First Alert Forecast August 12, 2022 4:47 pm First Alert Forecast: Weekend Heat Heat and thunderstorm chances will continue into the weekend. Meteorologist David Biggar has the evening forecast for Friday, August 12, 2022. US & World Videos 3:31 First Alert Forecast: Mostly Cloudy Saturday 3:12 First Alert Forecast: Rain this weekend 3:46 First Alert Forecast: Weekend Sprinkle Chance 3:47 First Alert Forecast: Morning Clouds & Fog 3:03 First Alert Forecast: More Clouds & Fog