First Alert Forecast July 28, 2022 4:38 pm First Alert Forecast: Mountain Storms Return Thunderstorms will develop over the mountains this weekend as monsoonal moisture increases. Meteorologist David Biggar has the evening forecast for Thursday, July 28, 2022. US & World Videos 3:46 First Alert Forecast: Beautiful Week Ahead 3:18 First Alert Forecast: Breezy Sunday 3:31 First Alert Forecast: Mostly Cloudy Saturday 3:12 First Alert Forecast: Rain this weekend 3:46 First Alert Forecast: Weekend Sprinkle Chance