storm January 27, 2021 6:11 am What to Know About Atmospheric Rivers and How They Impact Storms in California Atmospheric rivers are like rivers in the sky. They’re behind some of California’s wettest winters. NBC4 forecaster Anthony Yanez shows how they work. US & World Videos 3:07 First Alert Forecast: Patchy clouds and fog 2:59 First Alert Forecast: Windy Friday with possible showers 3:46 First Alert Forecast: Windy Friday 2:51 First Alert Forecast: Cooler weather lingers before weekend warm-up 3:49 First Alert Forecast: Cloudy & Drizzly Thursday