First Alert Forecast March 20, 2023 4:43 pm First Alert Forecast: Heavy Rain For Tuesday Heavy rain will move in for Tuesday and continue into Wednesday. Meteorologist David Biggar has the evening forecast for Monday, March 20, 2023. US & World Videos 3:25 First Alert Forecast: Critical fire weather 3:50 First Alert Forecast: Breezy Wednesday 3:42 First Alert Forecast: Winds & Fire Danger 2:55 First Alert Forecast: Red flag warning 2:53 First Alert Forecast: Weekend weather