First Alert Forecast June 21, 2022 4:37 pm First Alert Forecast: Heat & Thunderstorms Temperatures will warm up a bit for Wednesday, and an increase in monsoonal moisture will bring a chance of thunderstorms. Meteorologist David Biggar has the evening forecast for Tuesday, June 21, 2022. US & World Videos 3:00 First Alert Forecast: Sunday forecast 2:35 First Alert Forecast: Another round of May Gray 3:09 First Alert Forecast: What's ahead for the weekend 3:39 First Alert Forecast: May Gray Lingers 3:04 First Alert Forecast: Temperatures stay in the 60s and 70s