pocketmine\level\weather\WeatherManager::updateWeather PHP Method

    public static function updateWeather()
    {
        foreach (self::$registeredLevel as $level) {
            $level->getWeather()->calcWeather($level->getServer()->getTick());
        }
    }

 /**
  * Tries to execute a server tick
  */
 private function tick()
 {
     $tickTime = microtime(true);
     if ($tickTime - $this->nextTick < -0.025) {
         //Allow half a tick of diff
         return false;
     }
     Timings::$serverTickTimer->startTiming();
     ++$this->tickCounter;
     $this->checkConsole();
     Timings::$connectionTimer->startTiming();
     $this->network->processInterfaces();
     if ($this->rcon !== null) {
         $this->rcon->check();
     }
     Timings::$connectionTimer->stopTiming();
     Timings::$schedulerTimer->startTiming();
     $this->scheduler->mainThreadHeartbeat($this->tickCounter);
     Timings::$schedulerTimer->stopTiming();
     $this->checkTickUpdates($this->tickCounter, $tickTime);
     foreach ($this->players as $player) {
         $player->checkNetwork();
     }
     if (($this->tickCounter & 0b1111) === 0) {
         $this->titleTick();
         $this->maxTick = 20;
         $this->maxUse = 0;
         if (($this->tickCounter & 0b111111111) === 0) {
             if ($this->dserverConfig["enable"] and $this->dserverConfig["queryTickUpdate"] or !$this->dserverConfig["enable"]) {
                 $this->updateQuery();
             }
         }
         $this->getNetwork()->updateName();
     }
     if ($this->autoSave and ++$this->autoSaveTicker >= $this->autoSaveTicks) {
         $this->autoSaveTicker = 0;
         $this->doAutoSave();
     }
     if ($this->weatherEnabled) {
         WeatherManager::updateWeather();
     }
     /*if($this->sendUsageTicker > 0 and --$this->sendUsageTicker === 0){
     			$this->sendUsageTicker = 6000;
     			$this->sendUsage(SendUsageTask::TYPE_STATUS);
     		}*/
     if ($this->tickCounter % 100 === 0) {
         foreach ($this->levels as $level) {
             $level->clearCache();
         }
         if ($this->getTicksPerSecondAverage() < 1) {
             $this->logger->warning($this->getLanguage()->translateString("pocketmine.server.tickOverload"));
         }
     }
     if ($this->dispatchSignals and $this->tickCounter % 5 === 0) {
         pcntl_signal_dispatch();
     }
     $this->getMemoryManager()->check();
     Timings::$serverTickTimer->stopTiming();
     $now = microtime(true);
     $tick = min(20, 1 / max(0.001, $now - $tickTime));
     $use = min(1, ($now - $tickTime) / 0.05);
     //TimingsHandler::tick($tick <= $this->profilingTickRate);
     if ($this->maxTick > $tick) {
         $this->maxTick = $tick;
     }
     if ($this->maxUse < $use) {
         $this->maxUse = $use;
     }
     array_shift($this->tickAverage);
     $this->tickAverage[] = $tick;
     array_shift($this->useAverage);
     $this->useAverage[] = $use;
     if ($this->nextTick - $tickTime < -1) {
         $this->nextTick = $tickTime;
     } else {
         $this->nextTick += 0.05;
     }
     return true;
 }