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              1
              <?php
            
              2
              
              3
              function weatherRound1(float $value): float
            
              4
              {
            
              5
                  return round($value, 1);
            
              6
              }
            
              7
              
              8
              function weatherWmo(int $code): array
            
              9
              {
            
              10
                  static $codes = [
            
              11
                      0 => ['label' => 'Clear sky', 'icon' => '☀️'],
            
              12
                      1 => ['label' => 'Mainly clear', 'icon' => '🌤️'],
            
              13
                      2 => ['label' => 'Partly cloudy', 'icon' => '⛅'],
            
              14
                      3 => ['label' => 'Overcast', 'icon' => '☁️'],
            
              15
                      45 => ['label' => 'Foggy', 'icon' => '🌫️'],
            
              16
                      48 => ['label' => 'Icy fog', 'icon' => '🌫️'],
            
              17
                      51 => ['label' => 'Light drizzle', 'icon' => '🌦️'],
            
              18
                      53 => ['label' => 'Drizzle', 'icon' => '🌦️'],
            
              19
                      55 => ['label' => 'Heavy drizzle', 'icon' => '🌧️'],
            
              20
                      61 => ['label' => 'Light rain', 'icon' => '🌧️'],
            
              21
                      63 => ['label' => 'Rain', 'icon' => '🌧️'],
            
              22
                      65 => ['label' => 'Heavy rain', 'icon' => '🌧️'],
            
              23
                      71 => ['label' => 'Light snow', 'icon' => '🌨️'],
            
              24
                      73 => ['label' => 'Snow', 'icon' => '❄️'],
            
              25
                      75 => ['label' => 'Heavy snow', 'icon' => '❄️'],
            
              26
                      77 => ['label' => 'Snow grains', 'icon' => '🌨️'],
            
              27
                      80 => ['label' => 'Light showers', 'icon' => '🌦️'],
            
              28
                      81 => ['label' => 'Showers', 'icon' => '🌧️'],
            
              29
                      82 => ['label' => 'Heavy showers', 'icon' => '🌧️'],
            
              30
                      85 => ['label' => 'Snow showers', 'icon' => '🌨️'],
            
              31
                      86 => ['label' => 'Heavy snow showers', 'icon' => '❄️'],
            
              32
                      95 => ['label' => 'Thunderstorm', 'icon' => '⛈️'],
            
              33
                      96 => ['label' => 'Thunderstorm w/ hail', 'icon' => '⛈️'],
            
              34
                      99 => ['label' => 'Thunderstorm w/ heavy hail', 'icon' => '⛈️'],
            
              35
                  ];
            
              36
              
              37
                  return $codes[$code] ?? ['label' => 'Unknown', 'icon' => '🌡️'];
            
              38
              }
            
              39
              
              40
              function weatherWindDirection(float $degrees): string
            
              41
              {
            
              42
                  $directions = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'];
            
              43
                  return $directions[((int)round($degrees / 45)) % 8];
            
              44
              }
            
              45
              
              46
              function weatherDewPoint(float $tempC, float $humidity): float
            
              47
              {
            
              48
                  $a = 17.625;
            
              49
                  $b = 243.04;
            
              50
                  $safeHumidity = max(0.1, min(100, $humidity));
            
              51
                  $gamma = log($safeHumidity / 100) + ($a * $tempC) / ($b + $tempC);
            
              52
                  return weatherRound1(($b * $gamma) / ($a - $gamma));
            
              53
              }
            
              54
              
              55
              function weatherWetBulb(float $tempC, float $humidity): float
            
              56
              {
            
              57
                  return $tempC * atan(0.151977 * sqrt($humidity + 8.313659))
            
              58
                      + atan($tempC + $humidity)
            
              59
                      - atan($humidity - 1.676331)
            
              60
                      + 0.00391838 * pow($humidity, 1.5) * atan(0.023101 * $humidity)
            
              61
                      - 4.686035;
            
              62
              }
            
              63
              
              64
              function weatherDeltaT(float $tempC, float $humidity): float
            
              65
              {
            
              66
                  return weatherRound1($tempC - weatherWetBulb($tempC, $humidity));
            
              67
              }
            
              68
              
              69
              function weatherSprayRating(
            
              70
                  float $deltaT,
            
              71
                  float $wind,
            
              72
                  float $tempC,
            
              73
                  float $precipMm,
            
              74
                  float $precipProbability
            
              75
              ): array {
            
              76
                  if ($precipMm > 0) return ['rating' => 'Poor — raining', 'cls' => 'spray-poor'];
            
              77
                  if ($wind > 24) return ['rating' => 'Poor — wind too high', 'cls' => 'spray-poor'];
            
              78
                  if ($deltaT < 1) return ['rating' => 'Poor — inversion risk', 'cls' => 'spray-poor'];
            
              79
                  if ($deltaT > 12) return ['rating' => 'Poor — too hot/dry', 'cls' => 'spray-poor'];
            
              80
                  if ($tempC < 5) return ['rating' => 'Poor — too cold', 'cls' => 'spray-poor'];
            
              81
                  if ($deltaT < 2) return ['rating' => 'Marginal — low Delta T', 'cls' => 'spray-marginal'];
            
              82
                  if ($deltaT > 10) return ['rating' => 'Marginal — high Delta T', 'cls' => 'spray-marginal'];
            
              83
                  if ($wind > 15) return ['rating' => 'Marginal — windy', 'cls' => 'spray-marginal'];
            
              84
                  if ($wind < 3) return ['rating' => 'Marginal — calm/inversion risk', 'cls' => 'spray-marginal'];
            
              85
                  if ($tempC < 10) return ['rating' => 'Marginal — cool', 'cls' => 'spray-marginal'];
            
              86
                  if ($precipProbability >= 50) return ['rating' => 'Marginal — rain likely', 'cls' => 'spray-marginal'];
            
              87
                  if ($deltaT >= 2 && $deltaT <= 8 && $wind >= 3 && $wind <= 15 && $tempC >= 10 && $precipProbability < 30) {
            
              88
                      return ['rating' => 'Ideal', 'cls' => 'spray-ideal'];
            
              89
                  }
            
              90
                  return ['rating' => 'Good', 'cls' => 'spray-good'];
            
              91
              }
            
              92
              
              93
              function weatherFetch(string $url, int $timeout, array $headers = []): ?string
            
              94
              {
            
              95
                  $headerLines = array_merge([
            
              96
                      'User-Agent: dispelled.ca weather dashboard (local farm conditions)',
            
              97
                      'Accept: application/json,text/html,application/xhtml+xml',
            
              98
                  ], $headers);
            
              99
                  $context = stream_context_create([
            
              100
                      'http' => [
            
              101
                          'method' => 'GET',
            
              102
                          'timeout' => $timeout,
            
              103
                          'ignore_errors' => true,
            
              104
                          'header' => implode("\r\n", $headerLines),
            
              105
                      ],
            
              106
                  ]);
            
              107
                  $body = @file_get_contents($url, false, $context);
            
              108
                  if ($body === false) return null;
            
              109
              
              110
                  $status = 0;
            
              111
                  foreach ($http_response_header ?? [] as $line) {
            
              112
                      if (preg_match('#^HTTP/\S+\s+(\d{3})#', $line, $match)) {
            
              113
                          $status = (int)$match[1];
            
              114
                      }
            
              115
                  }
            
              116
                  return $status >= 200 && $status < 300 ? $body : null;
            
              117
              }
            
              118
              
              119
              function weatherJsonObjectAt(string $text, int $start): ?array
            
              120
              {
            
              121
                  $depth = 0;
            
              122
                  $inString = false;
            
              123
                  $escaped = false;
            
              124
                  $length = strlen($text);
            
              125
              
              126
                  for ($i = $start; $i < $length; $i++) {
            
              127
                      $char = $text[$i];
            
              128
                      if ($inString) {
            
              129
                          if ($escaped) {
            
              130
                              $escaped = false;
            
              131
                          } elseif ($char === '\\') {
            
              132
                              $escaped = true;
            
              133
                          } elseif ($char === '"') {
            
              134
                              $inString = false;
            
              135
                          }
            
              136
                          continue;
            
              137
                      }
            
              138
                      if ($char === '"') {
            
              139
                          $inString = true;
            
              140
                      } elseif ($char === '{') {
            
              141
                          $depth++;
            
              142
                      } elseif ($char === '}') {
            
              143
                          $depth--;
            
              144
                          if ($depth === 0) {
            
              145
                              $decoded = json_decode(substr($text, $start, $i - $start + 1), true);
            
              146
                              return is_array($decoded) ? $decoded : null;
            
              147
                          }
            
              148
                      }
            
              149
                  }
            
              150
                  return null;
            
              151
              }
            
              152
              
              153
              function weatherArdillRecordToObservation(array $record): ?array
            
              154
              {
            
              155
                  if (!isset($record['obsTimeLocal'], $record['obsTimeUtc'], $record['imperial'])) return null;
            
              156
              
              157
                  $observed = strtotime((string)$record['obsTimeUtc']);
            
              158
                  if ($observed === false || time() - $observed > 90 * 60 || !is_array($record['imperial'])) return null;
            
              159
                  $values = $record['imperial'];
            
              160
                  $number = static fn($value): ?float => is_numeric($value) ? (float)$value : null;
            
              161
                  $fToC = static fn(?float $value): ?float => $value === null ? null : ($value - 32) * 5 / 9;
            
              162
                  $miToKm = static fn(?float $value): ?float => $value === null ? null : $value * 1.609344;
            
              163
                  $inToMm = static fn(?float $value): ?float => $value === null ? null : $value * 25.4;
            
              164
                  $inHgToHpa = static fn(?float $value): ?float => $value === null ? null : $value * 33.8638866667;
            
              165
              
              166
                  $pressureLow = $number($values['pressureMin'] ?? $values['pressure'] ?? null);
            
              167
                  $pressureHigh = $number($values['pressureMax'] ?? $values['pressure'] ?? null);
            
              168
                  $averagePressure = ($pressureLow === null && $pressureHigh === null)
            
              169
                      ? null
            
              170
                      : (($pressureLow ?? $pressureHigh) + ($pressureHigh ?? $pressureLow)) / 2;
            
              171
              
              172
                  return [
            
              173
                      'observedAt' => (string)$record['obsTimeLocal'],
            
              174
                      'tempC' => $fToC($number($values['tempAvg'] ?? $values['temp'] ?? null)),
            
              175
                      'humidity' => $number($record['humidityAvg'] ?? $record['humidity'] ?? null),
            
              176
                      'dewPointC' => $fToC($number($values['dewptAvg'] ?? $values['dewpt'] ?? null)),
            
              177
                      'windKmh' => $miToKm($number($values['windspeedAvg'] ?? $values['windSpeed'] ?? null)),
            
              178
                      'windGustKmh' => $miToKm($number($values['windgustAvg'] ?? $values['windGust'] ?? null)),
            
              179
                      'windDirection' => $number($record['winddirAvg'] ?? $record['winddir'] ?? null),
            
              180
                      'pressureHpa' => $inHgToHpa($averagePressure),
            
              181
                      'precipRateMm' => $inToMm($number($values['precipRate'] ?? null)),
            
              182
                      'precipTodayMm' => $inToMm($number($values['precipTotal'] ?? null)),
            
              183
                      'uv' => $number($record['uvHigh'] ?? $record['uv'] ?? null),
            
              184
                  ];
            
              185
              }
            
              186
              
              187
              function weatherArdillObservation(): ?array
            
              188
              {
            
              189
                  $stationId = 'IARDIL4';
            
              190
                  $body = weatherFetch("https://www.wunderground.com/dashboard/pws/{$stationId}", 10);
            
              191
                  if ($body === null) return null;
            
              192
              
              193
                  $marker = '{"stationID":"' . $stationId . '"';
            
              194
                  $start = strrpos($body, $marker);
            
              195
                  if ($start !== false) {
            
              196
                      $record = weatherJsonObjectAt($body, $start);
            
              197
                      $observation = is_array($record) ? weatherArdillRecordToObservation($record) : null;
            
              198
                      if ($observation !== null) return $observation;
            
              199
                  }
            
              200
              
              201
                  if (!preg_match('/apiKey=([A-Za-z0-9]+)/', $body, $match)) return null;
            
              202
                  $params = http_build_query([
            
              203
                      'apiKey' => $match[1],
            
              204
                      'stationId' => $stationId,
            
              205
                      'numericPrecision' => 'decimal',
            
              206
                      'format' => 'json',
            
              207
                      'units' => 'e',
            
              208
                  ]);
            
              209
                  $currentBody = weatherFetch("https://api.weather.com/v2/pws/observations/current?{$params}", 10);
            
              210
                  if ($currentBody === null) return null;
            
              211
              
              212
                  $current = json_decode($currentBody, true);
            
              213
                  $record = $current['observations'][0] ?? null;
            
              214
                  return is_array($record) ? weatherArdillRecordToObservation($record) : null;
            
              215
              }
            
              216
              
              217
              function getFullWeather(): ?array
            
              218
              {
            
              219
                  $cacheFile = CACHE_DIR . '/weather_full.json';
            
              220
                  $cached = null;
            
              221
                  if (is_file($cacheFile)) {
            
              222
                      $decoded = json_decode((string)file_get_contents($cacheFile), true);
            
              223
                      if (is_array($decoded) && empty($decoded['error'])) {
            
              224
                          $cached = $decoded;
            
              225
                          if (time() - filemtime($cacheFile) < 900) return $cached;
            
              226
                      }
            
              227
                  }
            
              228
              
              229
                  $latitude = '49.9007';
            
              230
                  $longitude = '-105.79557';
            
              231
                  $timezone = new DateTimeZone('America/Regina');
            
              232
                  $today = new DateTimeImmutable('today', $timezone);
            
              233
                  $yesterday = $today->modify('-1 day');
            
              234
                  $seasonStart = $today->format('Y') . '-05-01';
            
              235
                  $fetchHistory = $yesterday->format('Y-m-d') >= $seasonStart;
            
              236
              
              237
                  $weatherParams = http_build_query([
            
              238
                      'latitude' => $latitude,
            
              239
                      'longitude' => $longitude,
            
              240
                      'current' => 'temperature_2m,relative_humidity_2m,apparent_temperature,weather_code,wind_speed_10m,wind_direction_10m,wind_gusts_10m,precipitation,surface_pressure,cloud_cover,visibility,uv_index,is_day',
            
              241
                      'hourly' => 'temperature_2m,relative_humidity_2m,dew_point_2m,precipitation_probability,precipitation,snowfall,weather_code,wind_speed_10m,wind_direction_10m,visibility,uv_index,shortwave_radiation,cape,lifted_index,freezing_level_height,soil_temperature_0cm,soil_temperature_6cm,soil_temperature_18cm,soil_moisture_0_to_1cm,soil_moisture_3_to_9cm,soil_moisture_9_to_27cm',
            
              242
                      'daily' => 'weather_code,temperature_2m_max,temperature_2m_min,apparent_temperature_max,apparent_temperature_min,sunrise,sunset,uv_index_max,precipitation_sum,precipitation_hours,precipitation_probability_max,snowfall_sum,wind_speed_10m_max,wind_gusts_10m_max,wind_direction_10m_dominant,et0_fao_evapotranspiration,sunshine_duration,shortwave_radiation_sum',
            
              243
                      'temperature_unit' => 'celsius',
            
              244
                      'wind_speed_unit' => 'kmh',
            
              245
                      'timezone' => 'America/Regina',
            
              246
                      'forecast_days' => 7,
            
              247
                      'past_days' => 7,
            
              248
                  ]);
            
              249
                  $weatherBody = weatherFetch("https://api.open-meteo.com/v1/forecast?{$weatherParams}", 10);
            
              250
                  if ($weatherBody === null) return $cached;
            
              251
                  $wx = json_decode($weatherBody, true);
            
              252
                  if (!is_array($wx) || empty($wx['current']) || empty($wx['daily']) || empty($wx['hourly'])) return $cached;
            
              253
              
              254
                  $history = null;
            
              255
                  if ($fetchHistory) {
            
              256
                      $historyParams = http_build_query([
            
              257
                          'latitude' => $latitude,
            
              258
                          'longitude' => $longitude,
            
              259
                          'start_date' => $seasonStart,
            
              260
                          'end_date' => $yesterday->format('Y-m-d'),
            
              261
                          'daily' => 'temperature_2m_max,temperature_2m_min',
            
              262
                          'timezone' => 'America/Regina',
            
              263
                      ]);
            
              264
                      $historyBody = weatherFetch("https://archive-api.open-meteo.com/v1/archive?{$historyParams}", 15);
            
              265
                      if ($historyBody !== null) $history = json_decode($historyBody, true);
            
              266
                  }
            
              267
                  $station = weatherArdillObservation();
            
              268
              
              269
                  $seasonGdd = 0.0;
            
              270
                  $seasonGddDays = 0;
            
              271
                  if (is_array($history['daily']['time'] ?? null)) {
            
              272
                      foreach ($history['daily']['time'] as $index => $_date) {
            
              273
                          $high = $history['daily']['temperature_2m_max'][$index] ?? null;
            
              274
                          $low = $history['daily']['temperature_2m_min'][$index] ?? null;
            
              275
                          if ($high !== null && $low !== null) {
            
              276
                              $seasonGdd += max(0, ((float)$high + (float)$low) / 2 - 10);
            
              277
                              $seasonGddDays++;
            
              278
                          }
            
              279
                      }
            
              280
                  }
            
              281
              
              282
                  $current = $wx['current'];
            
              283
                  $daily = $wx['daily'];
            
              284
                  $hourlyData = $wx['hourly'];
            
              285
                  $currentWmo = weatherWmo((int)$current['weather_code']);
            
              286
                  $currentTemp = (float)($station['tempC'] ?? $current['temperature_2m']);
            
              287
                  $currentHumidity = (float)($station['humidity'] ?? $current['relative_humidity_2m']);
            
              288
                  $currentWind = (float)($station['windKmh'] ?? $current['wind_speed_10m']);
            
              289
                  $currentWindDirection = (float)($station['windDirection'] ?? $current['wind_direction_10m']);
            
              290
                  $currentPrecip = (float)($station['precipRateMm'] ?? $current['precipitation'] ?? 0);
            
              291
                  $todayString = substr((string)$current['time'], 0, 10);
            
              292
              
              293
                  $precipHistory = [];
            
              294
                  foreach ($daily['time'] as $index => $date) {
            
              295
                      if ($date < $todayString) {
            
              296
                          $precipHistory[] = ['date' => $date, 'precip' => weatherRound1((float)($daily['precipitation_sum'][$index] ?? 0))];
            
              297
                      }
            
              298
                  }
            
              299
                  $sevenDayPastTotal = weatherRound1(array_sum(array_column($precipHistory, 'precip')));
            
              300
                  $daysSinceRain = 0;
            
              301
                  for ($index = count($precipHistory) - 1; $index >= 0; $index--) {
            
              302
                      if ($precipHistory[$index]['precip'] >= 1) break;
            
              303
                      $daysSinceRain++;
            
              304
                  }
            
              305
              
              306
                  $currentDeltaT = weatherDeltaT($currentTemp, $currentHumidity);
            
              307
                  $currentSpray = weatherSprayRating($currentDeltaT, round($currentWind), $currentTemp, $currentPrecip, 0);
            
              308
              
              309
                  $startIndex = 0;
            
              310
                  foreach ($hourlyData['time'] as $index => $time) {
            
              311
                      if ($time >= $current['time']) {
            
              312
                          $startIndex = $index;
            
              313
                          break;
            
              314
                      }
            
              315
                  }
            
              316
                  $hourly = [];
            
              317
                  $end = min($startIndex + 24, count($hourlyData['time']));
            
              318
                  for ($index = $startIndex; $index < $end; $index++) {
            
              319
                      $wmo = weatherWmo((int)$hourlyData['weather_code'][$index]);
            
              320
                      $temp = (float)$hourlyData['temperature_2m'][$index];
            
              321
                      $humidity = (float)($hourlyData['relative_humidity_2m'][$index] ?? 50);
            
              322
                      $deltaT = weatherDeltaT($temp, $humidity);
            
              323
                      $spray = weatherSprayRating(
            
              324
                          $deltaT,
            
              325
                          round((float)($hourlyData['wind_speed_10m'][$index] ?? 0)),
            
              326
                          $temp,
            
              327
                          (float)($hourlyData['precipitation'][$index] ?? 0),
            
              328
                          (float)($hourlyData['precipitation_probability'][$index] ?? 0)
            
              329
                      );
            
              330
                      $hourly[] = [
            
              331
                          'time' => substr((string)$hourlyData['time'][$index], 11, 5),
            
              332
                          'temp' => (int)round($temp),
            
              333
                          'rh' => (int)round($humidity),
            
              334
                          'dew_point' => weatherRound1((float)($hourlyData['dew_point_2m'][$index] ?? 0)),
            
              335
                          'delta_t' => $deltaT,
            
              336
                          'spray_rating' => $spray['rating'],
            
              337
                          'spray_cls' => $spray['cls'],
            
              338
                          'precip_prob' => $hourlyData['precipitation_probability'][$index] ?? 0,
            
              339
                          'precip' => weatherRound1((float)($hourlyData['precipitation'][$index] ?? 0)),
            
              340
                          'snowfall' => weatherRound1((float)($hourlyData['snowfall'][$index] ?? 0)),
            
              341
                          'wind' => (int)round((float)($hourlyData['wind_speed_10m'][$index] ?? 0)),
            
              342
                          'wind_dir' => weatherWindDirection((float)($hourlyData['wind_direction_10m'][$index] ?? 0)),
            
              343
                          'icon' => $wmo['icon'],
            
              344
                          'uv' => weatherRound1((float)($hourlyData['uv_index'][$index] ?? 0)),
            
              345
                          'shortwave' => (int)round((float)($hourlyData['shortwave_radiation'][$index] ?? 0)),
            
              346
                          'cape' => (int)round((float)($hourlyData['cape'][$index] ?? 0)),
            
              347
                          'lifted_index' => weatherRound1((float)($hourlyData['lifted_index'][$index] ?? 0)),
            
              348
                          'freezing_level' => isset($hourlyData['freezing_level_height'][$index]) ? (int)round((float)$hourlyData['freezing_level_height'][$index]) : null,
            
              349
                          'soil_temp_0' => weatherRound1((float)($hourlyData['soil_temperature_0cm'][$index] ?? 0)),
            
              350
                          'soil_temp_6' => weatherRound1((float)($hourlyData['soil_temperature_6cm'][$index] ?? 0)),
            
              351
                          'soil_temp_18' => weatherRound1((float)($hourlyData['soil_temperature_18cm'][$index] ?? 0)),
            
              352
                          'soil_moist_0' => weatherRound1((float)($hourlyData['soil_moisture_0_to_1cm'][$index] ?? 0) * 100),
            
              353
                          'soil_moist_3' => weatherRound1((float)($hourlyData['soil_moisture_3_to_9cm'][$index] ?? 0) * 100),
            
              354
                          'soil_moist_9' => weatherRound1((float)($hourlyData['soil_moisture_9_to_27cm'][$index] ?? 0) * 100),
            
              355
                          'visibility' => round((float)($hourlyData['visibility'][$index] ?? 0) / 100) / 10,
            
              356
                      ];
            
              357
                  }
            
              358
              
              359
                  $forecast = [];
            
              360
                  $gddCumulative = 0.0;
            
              361
                  foreach ($daily['time'] as $index => $date) {
            
              362
                      if ($date < $todayString) continue;
            
              363
                      $wmo = weatherWmo((int)$daily['weather_code'][$index]);
            
              364
                      $low = (int)round((float)$daily['temperature_2m_min'][$index]);
            
              365
                      $high = (int)round((float)$daily['temperature_2m_max'][$index]);
            
              366
                      $gdd = max(0, weatherRound1(($high + $low) / 2 - 10));
            
              367
                      $gddCumulative += $gdd;
            
              368
                      $forecast[] = [
            
              369
                          'date' => $date,
            
              370
                          'high' => $high,
            
              371
                          'low' => $low,
            
              372
                          'feels_high' => (int)round((float)$daily['apparent_temperature_max'][$index]),
            
              373
                          'feels_low' => (int)round((float)$daily['apparent_temperature_min'][$index]),
            
              374
                          'label' => $wmo['label'],
            
              375
                          'icon' => $wmo['icon'],
            
              376
                          'precip_prob' => $daily['precipitation_probability_max'][$index] ?? 0,
            
              377
                          'precip_sum' => weatherRound1((float)($daily['precipitation_sum'][$index] ?? 0)),
            
              378
                          'precip_hrs' => $daily['precipitation_hours'][$index] ?? 0,
            
              379
                          'snowfall_sum' => weatherRound1((float)($daily['snowfall_sum'][$index] ?? 0)),
            
              380
                          'wind_max' => (int)round((float)($daily['wind_speed_10m_max'][$index] ?? 0)),
            
              381
                          'gust_max' => (int)round((float)($daily['wind_gusts_10m_max'][$index] ?? 0)),
            
              382
                          'wind_dir' => weatherWindDirection((float)($daily['wind_direction_10m_dominant'][$index] ?? 0)),
            
              383
                          'uv_max' => weatherRound1((float)($daily['uv_index_max'][$index] ?? 0)),
            
              384
                          'sunrise' => !empty($daily['sunrise'][$index]) ? substr((string)$daily['sunrise'][$index], 11, 5) : '—',
            
              385
                          'sunset' => !empty($daily['sunset'][$index]) ? substr((string)$daily['sunset'][$index], 11, 5) : '—',
            
              386
                          'et0' => weatherRound1((float)($daily['et0_fao_evapotranspiration'][$index] ?? 0)),
            
              387
                          'sunshine_hrs' => weatherRound1((float)($daily['sunshine_duration'][$index] ?? 0) / 3600),
            
              388
                          'solar_sum' => weatherRound1((float)($daily['shortwave_radiation_sum'][$index] ?? 0)),
            
              389
                          'gdd' => $gdd,
            
              390
                          'gdd_cum' => weatherRound1($gddCumulative),
            
              391
                          'frost' => $low <= 2,
            
              392
                          'freeze' => $low <= 0,
            
              393
                      ];
            
              394
                  }
            
              395
                  if ($forecast) {
            
              396
                      $seasonGdd += $forecast[0]['gdd'];
            
              397
                      $seasonGddDays++;
            
              398
                  }
            
              399
              
              400
                  $data = [
            
              401
                      'location' => 'Ardill, SK',
            
              402
                      'temp' => (int)round($currentTemp),
            
              403
                      'feelsLike' => (int)round((float)$current['apparent_temperature']),
            
              404
                      'dewPoint' => isset($station['dewPointC']) ? weatherRound1((float)$station['dewPointC']) : weatherDewPoint($currentTemp, $currentHumidity),
            
              405
                      'deltaT' => $currentDeltaT,
            
              406
                      'spray' => $currentSpray,
            
              407
                      'humidity' => (int)round($currentHumidity),
            
              408
                      'windSpeed' => (int)round($currentWind),
            
              409
                      'windDir' => weatherWindDirection($currentWindDirection),
            
              410
                      'windGusts' => (int)round((float)($station['windGustKmh'] ?? $current['wind_gusts_10m'] ?? 0)),
            
              411
                      'precip' => weatherRound1($currentPrecip),
            
              412
                      'precipLabel' => isset($station['precipRateMm']) ? 'Precip rate' : 'Precip now',
            
              413
                      'precipUnit' => isset($station['precipRateMm']) ? 'mm/h' : 'mm',
            
              414
                      'precipToday' => isset($station['precipTodayMm']) ? weatherRound1((float)$station['precipTodayMm']) : null,
            
              415
                      'pressure' => (int)round((float)($station['pressureHpa'] ?? $current['surface_pressure'] ?? 0)),
            
              416
                      'cloud' => $current['cloud_cover'] ?? 0,
            
              417
                      'visibility' => round((float)($current['visibility'] ?? 0) / 100) / 10,
            
              418
                      'uv' => weatherRound1((float)($station['uv'] ?? $current['uv_index'] ?? 0)),
            
              419
                      'label' => $currentWmo['label'],
            
              420
                      'icon' => $currentWmo['icon'],
            
              421
                      'time' => $station['observedAt'] ?? $current['time'],
            
              422
                      'sources' => [
            
              423
                          'current' => $station
            
              424
                              ? ['label' => 'Ardill weather station IARDIL4', 'observedAt' => $station['observedAt'], 'url' => 'https://www.wunderground.com/dashboard/pws/IARDIL4']
            
              425
                              : ['label' => 'Open-Meteo location model for Ardill', 'observedAt' => $current['time'], 'url' => null],
            
              426
                          'enrichment' => 'Open-Meteo forecast, soil, history, and unavailable local fields for Ardill',
            
              427
                      ],
            
              428
                      'precipHistory' => $precipHistory,
            
              429
                      'sevenDayPastTotal' => $sevenDayPastTotal,
            
              430
                      'daysSinceRain' => $daysSinceRain,
            
              431
                      'forecast' => $forecast,
            
              432
                      'hourly' => $hourly,
            
              433
                      'seasonGdd' => weatherRound1($seasonGdd),
            
              434
                      'seasonGddDays' => $seasonGddDays,
            
              435
                      'seasonGddStart' => $seasonStart,
            
              436
                  ];
            
              437
              
              438
                  if (!is_dir(CACHE_DIR)) mkdir(CACHE_DIR, 0755, true);
            
              439
                  file_put_contents($cacheFile, json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE), LOCK_EX);
            
              440
                  return $data;
            
              441
              }

1	`<?php`
2
3	function weatherRound1(float $value): float
4	{
5	return round($value, 1);
6	}
7
8	function weatherWmo(int $code): array
9	{
10	static $codes = [
11	0 => ['label' => 'Clear sky', 'icon' => '☀️'],
12	1 => ['label' => 'Mainly clear', 'icon' => '🌤️'],
13	2 => ['label' => 'Partly cloudy', 'icon' => '⛅'],
14	3 => ['label' => 'Overcast', 'icon' => '☁️'],
15	45 => ['label' => 'Foggy', 'icon' => '🌫️'],
16	48 => ['label' => 'Icy fog', 'icon' => '🌫️'],
17	51 => ['label' => 'Light drizzle', 'icon' => '🌦️'],
18	53 => ['label' => 'Drizzle', 'icon' => '🌦️'],
19	55 => ['label' => 'Heavy drizzle', 'icon' => '🌧️'],
20	61 => ['label' => 'Light rain', 'icon' => '🌧️'],
21	63 => ['label' => 'Rain', 'icon' => '🌧️'],
22	65 => ['label' => 'Heavy rain', 'icon' => '🌧️'],
23	71 => ['label' => 'Light snow', 'icon' => '🌨️'],
24	73 => ['label' => 'Snow', 'icon' => '❄️'],
25	75 => ['label' => 'Heavy snow', 'icon' => '❄️'],
26	77 => ['label' => 'Snow grains', 'icon' => '🌨️'],
27	80 => ['label' => 'Light showers', 'icon' => '🌦️'],
28	81 => ['label' => 'Showers', 'icon' => '🌧️'],
29	82 => ['label' => 'Heavy showers', 'icon' => '🌧️'],
30	85 => ['label' => 'Snow showers', 'icon' => '🌨️'],
31	86 => ['label' => 'Heavy snow showers', 'icon' => '❄️'],
32	95 => ['label' => 'Thunderstorm', 'icon' => '⛈️'],
33	96 => ['label' => 'Thunderstorm w/ hail', 'icon' => '⛈️'],
34	99 => ['label' => 'Thunderstorm w/ heavy hail', 'icon' => '⛈️'],
35	];
36
37	return $codes[$code] ?? ['label' => 'Unknown', 'icon' => '🌡️'];
38	}
39
40	function weatherWindDirection(float $degrees): string
41	{
42	$directions = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'];
43	return $directions[((int)round($degrees / 45)) % 8];
44	}
45
46	function weatherDewPoint(float $tempC, float $humidity): float
47	{
48	$a = 17.625;
49	$b = 243.04;
50	$safeHumidity = max(0.1, min(100, $humidity));
51	$gamma = log($safeHumidity / 100) + ($a * $tempC) / ($b + $tempC);
52	return weatherRound1(($b * $gamma) / ($a - $gamma));
53	}
54
55	function weatherWetBulb(float $tempC, float $humidity): float
56	{
57	return $tempC * atan(0.151977 * sqrt($humidity + 8.313659))
58	+ atan($tempC + $humidity)
59	- atan($humidity - 1.676331)
60	+ 0.00391838 * pow($humidity, 1.5) * atan(0.023101 * $humidity)
61	- 4.686035;
62	}
63
64	function weatherDeltaT(float $tempC, float $humidity): float
65	{
66	return weatherRound1($tempC - weatherWetBulb($tempC, $humidity));
67	}
68
69	function weatherSprayRating(
70	float $deltaT,
71	float $wind,
72	float $tempC,
73	float $precipMm,
74	float $precipProbability
75	): array {
76	if ($precipMm > 0) return ['rating' => 'Poor — raining', 'cls' => 'spray-poor'];
77	if ($wind > 24) return ['rating' => 'Poor — wind too high', 'cls' => 'spray-poor'];
78	if ($deltaT < 1) return ['rating' => 'Poor — inversion risk', 'cls' => 'spray-poor'];
79	if ($deltaT > 12) return ['rating' => 'Poor — too hot/dry', 'cls' => 'spray-poor'];
80	if ($tempC < 5) return ['rating' => 'Poor — too cold', 'cls' => 'spray-poor'];
81	if ($deltaT < 2) return ['rating' => 'Marginal — low Delta T', 'cls' => 'spray-marginal'];
82	if ($deltaT > 10) return ['rating' => 'Marginal — high Delta T', 'cls' => 'spray-marginal'];
83	if ($wind > 15) return ['rating' => 'Marginal — windy', 'cls' => 'spray-marginal'];
84	if ($wind < 3) return ['rating' => 'Marginal — calm/inversion risk', 'cls' => 'spray-marginal'];
85	if ($tempC < 10) return ['rating' => 'Marginal — cool', 'cls' => 'spray-marginal'];
86	if ($precipProbability >= 50) return ['rating' => 'Marginal — rain likely', 'cls' => 'spray-marginal'];
87	if ($deltaT >= 2 && $deltaT <= 8 && $wind >= 3 && $wind <= 15 && $tempC >= 10 && $precipProbability < 30) {
88	return ['rating' => 'Ideal', 'cls' => 'spray-ideal'];
89	}
90	return ['rating' => 'Good', 'cls' => 'spray-good'];
91	}
92
93	function weatherFetch(string $url, int $timeout, array $headers = []): ?string
94	{
95	$headerLines = array_merge([
96	'User-Agent: dispelled.ca weather dashboard (local farm conditions)',
97	'Accept: application/json,text/html,application/xhtml+xml',
98	], $headers);
99	$context = stream_context_create([
100	'http' => [
101	'method' => 'GET',
102	'timeout' => $timeout,
103	'ignore_errors' => true,
104	'header' => implode("\r\n", $headerLines),
105	],
106	]);
107	$body = @file_get_contents($url, false, $context);
108	if ($body === false) return null;
109
110	$status = 0;
111	foreach ($http_response_header ?? [] as $line) {
112	if (preg_match('#^HTTP/\S+\s+(\d{3})#', $line, $match)) {
113	$status = (int)$match[1];
114	}
115	}
116	return $status >= 200 && $status < 300 ? $body : null;
117	}
118
119	function weatherJsonObjectAt(string $text, int $start): ?array
120	{
121	$depth = 0;
122	$inString = false;
123	$escaped = false;
124	$length = strlen($text);
125
126	for ($i = $start; $i < $length; $i++) {
127	$char = $text[$i];
128	if ($inString) {
129	if ($escaped) {
130	$escaped = false;
131	} elseif ($char === '\\') {
132	$escaped = true;
133	} elseif ($char === '"') {
134	$inString = false;
135	}
136	continue;
137	}
138	if ($char === '"') {
139	$inString = true;
140	} elseif ($char === '{') {
141	$depth++;
142	} elseif ($char === '}') {
143	$depth--;
144	if ($depth === 0) {
145	$decoded = json_decode(substr($text, $start, $i - $start + 1), true);
146	return is_array($decoded) ? $decoded : null;
147	}
148	}
149	}
150	return null;
151	}
152
153	function weatherArdillRecordToObservation(array $record): ?array
154	{
155	if (!isset($record['obsTimeLocal'], $record['obsTimeUtc'], $record['imperial'])) return null;
156
157	$observed = strtotime((string)$record['obsTimeUtc']);
158	if ($observed === false \|\| time() - $observed > 90 * 60 \|\| !is_array($record['imperial'])) return null;
159	$values = $record['imperial'];
160	$number = static fn($value): ?float => is_numeric($value) ? (float)$value : null;
161	$fToC = static fn(?float $value): ?float => $value === null ? null : ($value - 32) * 5 / 9;
162	$miToKm = static fn(?float $value): ?float => $value === null ? null : $value * 1.609344;
163	$inToMm = static fn(?float $value): ?float => $value === null ? null : $value * 25.4;
164	$inHgToHpa = static fn(?float $value): ?float => $value === null ? null : $value * 33.8638866667;
165
166	$pressureLow = $number($values['pressureMin'] ?? $values['pressure'] ?? null);
167	$pressureHigh = $number($values['pressureMax'] ?? $values['pressure'] ?? null);
168	$averagePressure = ($pressureLow === null && $pressureHigh === null)
169	? null
170	: (($pressureLow ?? $pressureHigh) + ($pressureHigh ?? $pressureLow)) / 2;
171
172	return [
173	'observedAt' => (string)$record['obsTimeLocal'],
174	'tempC' => $fToC($number($values['tempAvg'] ?? $values['temp'] ?? null)),
175	'humidity' => $number($record['humidityAvg'] ?? $record['humidity'] ?? null),
176	'dewPointC' => $fToC($number($values['dewptAvg'] ?? $values['dewpt'] ?? null)),
177	'windKmh' => $miToKm($number($values['windspeedAvg'] ?? $values['windSpeed'] ?? null)),
178	'windGustKmh' => $miToKm($number($values['windgustAvg'] ?? $values['windGust'] ?? null)),
179	'windDirection' => $number($record['winddirAvg'] ?? $record['winddir'] ?? null),
180	'pressureHpa' => $inHgToHpa($averagePressure),
181	'precipRateMm' => $inToMm($number($values['precipRate'] ?? null)),
182	'precipTodayMm' => $inToMm($number($values['precipTotal'] ?? null)),
183	'uv' => $number($record['uvHigh'] ?? $record['uv'] ?? null),
184	];
185	}
186
187	function weatherArdillObservation(): ?array
188	{
189	$stationId = 'IARDIL4';
190	$body = weatherFetch("https://www.wunderground.com/dashboard/pws/{$stationId}", 10);
191	if ($body === null) return null;
192
193	$marker = '{"stationID":"' . $stationId . '"';
194	$start = strrpos($body, $marker);
195	if ($start !== false) {
196	$record = weatherJsonObjectAt($body, $start);
197	$observation = is_array($record) ? weatherArdillRecordToObservation($record) : null;
198	if ($observation !== null) return $observation;
199	}
200
201	if (!preg_match('/apiKey=([A-Za-z0-9]+)/', $body, $match)) return null;
202	$params = http_build_query([
203	'apiKey' => $match[1],
204	'stationId' => $stationId,
205	'numericPrecision' => 'decimal',
206	'format' => 'json',
207	'units' => 'e',
208	]);
209	$currentBody = weatherFetch("https://api.weather.com/v2/pws/observations/current?{$params}", 10);
210	if ($currentBody === null) return null;
211
212	$current = json_decode($currentBody, true);
213	$record = $current['observations'][0] ?? null;
214	return is_array($record) ? weatherArdillRecordToObservation($record) : null;
215	}
216
217	function getFullWeather(): ?array
218	{
219	$cacheFile = CACHE_DIR . '/weather_full.json';
220	$cached = null;
221	if (is_file($cacheFile)) {
222	$decoded = json_decode((string)file_get_contents($cacheFile), true);
223	if (is_array($decoded) && empty($decoded['error'])) {
224	$cached = $decoded;
225	if (time() - filemtime($cacheFile) < 900) return $cached;
226	}
227	}
228
229	$latitude = '49.9007';
230	$longitude = '-105.79557';
231	$timezone = new DateTimeZone('America/Regina');
232	$today = new DateTimeImmutable('today', $timezone);
233	$yesterday = $today->modify('-1 day');
234	$seasonStart = $today->format('Y') . '-05-01';
235	$fetchHistory = $yesterday->format('Y-m-d') >= $seasonStart;
236
237	$weatherParams = http_build_query([
238	'latitude' => $latitude,
239	'longitude' => $longitude,
240	'current' => 'temperature_2m,relative_humidity_2m,apparent_temperature,weather_code,wind_speed_10m,wind_direction_10m,wind_gusts_10m,precipitation,surface_pressure,cloud_cover,visibility,uv_index,is_day',
241	'hourly' => 'temperature_2m,relative_humidity_2m,dew_point_2m,precipitation_probability,precipitation,snowfall,weather_code,wind_speed_10m,wind_direction_10m,visibility,uv_index,shortwave_radiation,cape,lifted_index,freezing_level_height,soil_temperature_0cm,soil_temperature_6cm,soil_temperature_18cm,soil_moisture_0_to_1cm,soil_moisture_3_to_9cm,soil_moisture_9_to_27cm',
242	'daily' => 'weather_code,temperature_2m_max,temperature_2m_min,apparent_temperature_max,apparent_temperature_min,sunrise,sunset,uv_index_max,precipitation_sum,precipitation_hours,precipitation_probability_max,snowfall_sum,wind_speed_10m_max,wind_gusts_10m_max,wind_direction_10m_dominant,et0_fao_evapotranspiration,sunshine_duration,shortwave_radiation_sum',
243	'temperature_unit' => 'celsius',
244	'wind_speed_unit' => 'kmh',
245	'timezone' => 'America/Regina',
246	'forecast_days' => 7,
247	'past_days' => 7,
248	]);
249	$weatherBody = weatherFetch("https://api.open-meteo.com/v1/forecast?{$weatherParams}", 10);
250	if ($weatherBody === null) return $cached;
251	$wx = json_decode($weatherBody, true);
252	if (!is_array($wx) \|\| empty($wx['current']) \|\| empty($wx['daily']) \|\| empty($wx['hourly'])) return $cached;
253
254	$history = null;
255	if ($fetchHistory) {
256	$historyParams = http_build_query([
257	'latitude' => $latitude,
258	'longitude' => $longitude,
259	'start_date' => $seasonStart,
260	'end_date' => $yesterday->format('Y-m-d'),
261	'daily' => 'temperature_2m_max,temperature_2m_min',
262	'timezone' => 'America/Regina',
263	]);
264	$historyBody = weatherFetch("https://archive-api.open-meteo.com/v1/archive?{$historyParams}", 15);
265	if ($historyBody !== null) $history = json_decode($historyBody, true);
266	}
267	$station = weatherArdillObservation();
268
269	$seasonGdd = 0.0;
270	$seasonGddDays = 0;
271	if (is_array($history['daily']['time'] ?? null)) {
272	foreach ($history['daily']['time'] as $index => $_date) {
273	$high = $history['daily']['temperature_2m_max'][$index] ?? null;
274	$low = $history['daily']['temperature_2m_min'][$index] ?? null;
275	if ($high !== null && $low !== null) {
276	$seasonGdd += max(0, ((float)$high + (float)$low) / 2 - 10);
277	$seasonGddDays++;
278	}
279	}
280	}
281
282	$current = $wx['current'];
283	$daily = $wx['daily'];
284	$hourlyData = $wx['hourly'];
285	$currentWmo = weatherWmo((int)$current['weather_code']);
286	$currentTemp = (float)($station['tempC'] ?? $current['temperature_2m']);
287	$currentHumidity = (float)($station['humidity'] ?? $current['relative_humidity_2m']);
288	$currentWind = (float)($station['windKmh'] ?? $current['wind_speed_10m']);
289	$currentWindDirection = (float)($station['windDirection'] ?? $current['wind_direction_10m']);
290	$currentPrecip = (float)($station['precipRateMm'] ?? $current['precipitation'] ?? 0);
291	$todayString = substr((string)$current['time'], 0, 10);
292
293	$precipHistory = [];
294	foreach ($daily['time'] as $index => $date) {
295	if ($date < $todayString) {
296	$precipHistory[] = ['date' => $date, 'precip' => weatherRound1((float)($daily['precipitation_sum'][$index] ?? 0))];
297	}
298	}
299	$sevenDayPastTotal = weatherRound1(array_sum(array_column($precipHistory, 'precip')));
300	$daysSinceRain = 0;
301	for ($index = count($precipHistory) - 1; $index >= 0; $index--) {
302	if ($precipHistory[$index]['precip'] >= 1) break;
303	$daysSinceRain++;
304	}
305
306	$currentDeltaT = weatherDeltaT($currentTemp, $currentHumidity);
307	$currentSpray = weatherSprayRating($currentDeltaT, round($currentWind), $currentTemp, $currentPrecip, 0);
308
309	$startIndex = 0;
310	foreach ($hourlyData['time'] as $index => $time) {
311	if ($time >= $current['time']) {
312	$startIndex = $index;
313	break;
314	}
315	}
316	$hourly = [];
317	$end = min($startIndex + 24, count($hourlyData['time']));
318	for ($index = $startIndex; $index < $end; $index++) {
319	$wmo = weatherWmo((int)$hourlyData['weather_code'][$index]);
320	$temp = (float)$hourlyData['temperature_2m'][$index];
321	$humidity = (float)($hourlyData['relative_humidity_2m'][$index] ?? 50);
322	$deltaT = weatherDeltaT($temp, $humidity);
323	$spray = weatherSprayRating(
324	$deltaT,
325	round((float)($hourlyData['wind_speed_10m'][$index] ?? 0)),
326	$temp,
327	(float)($hourlyData['precipitation'][$index] ?? 0),
328	(float)($hourlyData['precipitation_probability'][$index] ?? 0)
329	);
330	$hourly[] = [
331	'time' => substr((string)$hourlyData['time'][$index], 11, 5),
332	'temp' => (int)round($temp),
333	'rh' => (int)round($humidity),
334	'dew_point' => weatherRound1((float)($hourlyData['dew_point_2m'][$index] ?? 0)),
335	'delta_t' => $deltaT,
336	'spray_rating' => $spray['rating'],
337	'spray_cls' => $spray['cls'],
338	'precip_prob' => $hourlyData['precipitation_probability'][$index] ?? 0,
339	'precip' => weatherRound1((float)($hourlyData['precipitation'][$index] ?? 0)),
340	'snowfall' => weatherRound1((float)($hourlyData['snowfall'][$index] ?? 0)),
341	'wind' => (int)round((float)($hourlyData['wind_speed_10m'][$index] ?? 0)),
342	'wind_dir' => weatherWindDirection((float)($hourlyData['wind_direction_10m'][$index] ?? 0)),
343	'icon' => $wmo['icon'],
344	'uv' => weatherRound1((float)($hourlyData['uv_index'][$index] ?? 0)),
345	'shortwave' => (int)round((float)($hourlyData['shortwave_radiation'][$index] ?? 0)),
346	'cape' => (int)round((float)($hourlyData['cape'][$index] ?? 0)),
347	'lifted_index' => weatherRound1((float)($hourlyData['lifted_index'][$index] ?? 0)),
348	'freezing_level' => isset($hourlyData['freezing_level_height'][$index]) ? (int)round((float)$hourlyData['freezing_level_height'][$index]) : null,
349	'soil_temp_0' => weatherRound1((float)($hourlyData['soil_temperature_0cm'][$index] ?? 0)),
350	'soil_temp_6' => weatherRound1((float)($hourlyData['soil_temperature_6cm'][$index] ?? 0)),
351	'soil_temp_18' => weatherRound1((float)($hourlyData['soil_temperature_18cm'][$index] ?? 0)),
352	'soil_moist_0' => weatherRound1((float)($hourlyData['soil_moisture_0_to_1cm'][$index] ?? 0) * 100),
353	'soil_moist_3' => weatherRound1((float)($hourlyData['soil_moisture_3_to_9cm'][$index] ?? 0) * 100),
354	'soil_moist_9' => weatherRound1((float)($hourlyData['soil_moisture_9_to_27cm'][$index] ?? 0) * 100),
355	'visibility' => round((float)($hourlyData['visibility'][$index] ?? 0) / 100) / 10,
356	];
357	}
358
359	$forecast = [];
360	$gddCumulative = 0.0;
361	foreach ($daily['time'] as $index => $date) {
362	if ($date < $todayString) continue;
363	$wmo = weatherWmo((int)$daily['weather_code'][$index]);
364	$low = (int)round((float)$daily['temperature_2m_min'][$index]);
365	$high = (int)round((float)$daily['temperature_2m_max'][$index]);
366	$gdd = max(0, weatherRound1(($high + $low) / 2 - 10));
367	$gddCumulative += $gdd;
368	$forecast[] = [
369	'date' => $date,
370	'high' => $high,
371	'low' => $low,
372	'feels_high' => (int)round((float)$daily['apparent_temperature_max'][$index]),
373	'feels_low' => (int)round((float)$daily['apparent_temperature_min'][$index]),
374	'label' => $wmo['label'],
375	'icon' => $wmo['icon'],
376	'precip_prob' => $daily['precipitation_probability_max'][$index] ?? 0,
377	'precip_sum' => weatherRound1((float)($daily['precipitation_sum'][$index] ?? 0)),
378	'precip_hrs' => $daily['precipitation_hours'][$index] ?? 0,
379	'snowfall_sum' => weatherRound1((float)($daily['snowfall_sum'][$index] ?? 0)),
380	'wind_max' => (int)round((float)($daily['wind_speed_10m_max'][$index] ?? 0)),
381	'gust_max' => (int)round((float)($daily['wind_gusts_10m_max'][$index] ?? 0)),
382	'wind_dir' => weatherWindDirection((float)($daily['wind_direction_10m_dominant'][$index] ?? 0)),
383	'uv_max' => weatherRound1((float)($daily['uv_index_max'][$index] ?? 0)),
384	'sunrise' => !empty($daily['sunrise'][$index]) ? substr((string)$daily['sunrise'][$index], 11, 5) : '—',
385	'sunset' => !empty($daily['sunset'][$index]) ? substr((string)$daily['sunset'][$index], 11, 5) : '—',
386	'et0' => weatherRound1((float)($daily['et0_fao_evapotranspiration'][$index] ?? 0)),
387	'sunshine_hrs' => weatherRound1((float)($daily['sunshine_duration'][$index] ?? 0) / 3600),
388	'solar_sum' => weatherRound1((float)($daily['shortwave_radiation_sum'][$index] ?? 0)),
389	'gdd' => $gdd,
390	'gdd_cum' => weatherRound1($gddCumulative),
391	'frost' => $low <= 2,
392	'freeze' => $low <= 0,
393	];
394	}
395	if ($forecast) {
396	$seasonGdd += $forecast[0]['gdd'];
397	$seasonGddDays++;
398	}
399
400	$data = [
401	'location' => 'Ardill, SK',
402	'temp' => (int)round($currentTemp),
403	'feelsLike' => (int)round((float)$current['apparent_temperature']),
404	'dewPoint' => isset($station['dewPointC']) ? weatherRound1((float)$station['dewPointC']) : weatherDewPoint($currentTemp, $currentHumidity),
405	'deltaT' => $currentDeltaT,
406	'spray' => $currentSpray,
407	'humidity' => (int)round($currentHumidity),
408	'windSpeed' => (int)round($currentWind),
409	'windDir' => weatherWindDirection($currentWindDirection),
410	'windGusts' => (int)round((float)($station['windGustKmh'] ?? $current['wind_gusts_10m'] ?? 0)),
411	'precip' => weatherRound1($currentPrecip),
412	'precipLabel' => isset($station['precipRateMm']) ? 'Precip rate' : 'Precip now',
413	'precipUnit' => isset($station['precipRateMm']) ? 'mm/h' : 'mm',
414	'precipToday' => isset($station['precipTodayMm']) ? weatherRound1((float)$station['precipTodayMm']) : null,
415	'pressure' => (int)round((float)($station['pressureHpa'] ?? $current['surface_pressure'] ?? 0)),
416	'cloud' => $current['cloud_cover'] ?? 0,
417	'visibility' => round((float)($current['visibility'] ?? 0) / 100) / 10,
418	'uv' => weatherRound1((float)($station['uv'] ?? $current['uv_index'] ?? 0)),
419	'label' => $currentWmo['label'],
420	'icon' => $currentWmo['icon'],
421	'time' => $station['observedAt'] ?? $current['time'],
422	'sources' => [
423	'current' => $station
424	? ['label' => 'Ardill weather station IARDIL4', 'observedAt' => $station['observedAt'], 'url' => 'https://www.wunderground.com/dashboard/pws/IARDIL4']
425	: ['label' => 'Open-Meteo location model for Ardill', 'observedAt' => $current['time'], 'url' => null],
426	'enrichment' => 'Open-Meteo forecast, soil, history, and unavailable local fields for Ardill',
427	],
428	'precipHistory' => $precipHistory,
429	'sevenDayPastTotal' => $sevenDayPastTotal,
430	'daysSinceRain' => $daysSinceRain,
431	'forecast' => $forecast,
432	'hourly' => $hourly,
433	'seasonGdd' => weatherRound1($seasonGdd),
434	'seasonGddDays' => $seasonGddDays,
435	'seasonGddStart' => $seasonStart,
436	];
437
438	if (!is_dir(CACHE_DIR)) mkdir(CACHE_DIR, 0755, true);
439	file_put_contents($cacheFile, json_encode($data, JSON_UNESCAPED_SLASHES \| JSON_UNESCAPED_UNICODE), LOCK_EX);
440	return $data;
441	}