First Alert Forecast September 23, 2024 4:41 pm First Alert Forecast: Thin Marine Layer High pressure will keep the squeeze on the marine layer for the next few days. Meteorologist David Biggar has the evening forecast for Monday, September 23, 2024. 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