First Alert Forecast March 21, 2024 3:39 pm First Alert Forecast: Mostly Cloudy Friday Plenty of clouds will stream through the area on Friday ahead of weekend showers. Meteorologist David Biggar has the evening forecast for Thursday, March 21, 2024. US & World Videos 3:21 First Alert Forecast: Slowly clearing marine layer 3:37 First Alert Forecast: Cool Wednesday 3:38 First Alert Forecast: More May Gray 3:04 First Alert Forecast: Temperatures in the 70s 2:11 First Alert Forecast: May Gray into sunny skies