First Alert Forecast October 21, 2024 4:40 pm First Alert Forecast: Midweek Warmth Temperatures will be warm for Tuesday and Wendesday. Meteorologist David Biggar has the evening forecast for Monday, October 21, 2024. US & World Videos 3:49 First Alert Forecast: Midweek Heat 2:58 First Alert Forecast: Warm days 3:01 First Alert Forecast: Warm and dry week ahead 3:46 First Alert Forecast: Red flag warnings 4:12 First Alert Forecast: Deep marine layer