First Alert Forecast 18 hours ago First Alert Forecast: Inside Slider Temperatures cool through Thursday before offshore flow starts to develop. Meteorologist David Biggar has the evening forecast for Tuesday, October 15, 2024. US & World Videos 4:12 First Alert Forecast: Deep marine layer 3:46 First Alert Forecast: Cloudier & Cooler 2:56 First Alert Forecast: Cooler week ahead 3:40 First Alert Forecast: Finally Feeling Like Fall 2:04 First Alert Forecast: Cooling trend begins