First Alert Weather June 21, 2021 11:34 am Tracking More Heat Ahead of Storm Threat NBC10 First Alert Weather meteorologist Krystal Klei is tracking hot and humid conditions Monday that could lead to strong storms later in the day. She has the latest on the First Alert. US & World Videos 2:36 Gloomy weather sticks around for Sunday's Broad Street Run 2:44 Cloudy, chance for rain this weekend 2:41 The weekend kicks off with mostly cloudy skies and passing showers 2:31 Back to cooler temperatures 2:36 Back to spring temperatures