code: def refresh(self):
          
          self._raw = self._get_nws_feed()
          self._save_feed_cache(self._raw)
          return self._raw
docs: NOTE: You probably don't want to call this... This does not update the alerts loaded
          in the WeatherAlerts object, only the underlying feed. This is only used internally now and as such,
          will likely be deprecated soon. Please call `WeatherAlerts.refresh()` instead.