First Alert Forecast January 31, 2024 5:00 pm Timeline: When rain, mountain snow is forecast to hit SoCal Two incoming systems are slated to bring widespread rain to Southern California and mountain snow through the rest of the week. David Biggar reports for the NBC4 News on Jan. 31, 2024. US & World Videos 3:50 First Alert Forecast: Breezy Wednesday 3:42 First Alert Forecast: Winds & Fire Danger 2:53 First Alert Forecast: Weekend weather 3:32 First Alert Forecast: Hazy sunshine 3:02 First Alert Forecast: Cloudy morning