First Alert Forecast March 20, 2024 6:47 am First Alert Forecast: First full day of spring Here’s the forecast for the first full day of spring. Belen De Leon has the forecast for Wednesday March 20, 2024. US & World Videos 3:04 First Alert Forecast: Temperatures stay in the 60s and 70s 3:36 First Alert Forecast: More May Gray 3:21 First Alert Forecast: Slowly clearing marine layer 3:37 First Alert Forecast: Cool Wednesday 3:38 First Alert Forecast: More May Gray