weather August 17, 2020 9:20 am How a Firenado Is Formed A rare fire tornado was spotted over the weekend during a wildfire burning in the Lake Tahoe area. Belen de Leon explains how a firenado is formed. As seen on Today in LA on Monday, Aug. 17, 2020. 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