First Alert Forecast March 17, 2023 4:34 pm First Alert Forecast: Weekend Changes Saturday looks beautiful around Southern California, but changes start on Sunday. Meteorologist David Biggar has the evening forecast for Friday, March 17, 2023. US & World Videos 3:31 First Alert Forecast: Mostly Cloudy Saturday 3:12 First Alert Forecast: Rain this weekend 3:46 First Alert Forecast: Weekend Sprinkle Chance 3:47 First Alert Forecast: Morning Clouds & Fog 3:03 First Alert Forecast: More Clouds & Fog