July 26, 2019 12:00 am Jeff's Forecast: Dangerous Weekend Heat Temperatures will rapidly increase this weekend. Chief Meteorologist Jeff Ranieri has more on the heat warning and how long it will last in your Microclimate Forecast. US & World Videos 2:58 Jeff's Forecast: Saturday rain drops temps and brings major Sierra snow 3:25 Bay Area Forecast: Storm brings rain, colder temps and big Sierra snow 2:31 Forecast: Rainy Saturday ahead 2:12 Kari's forecast: Rainy Saturday ahead 2:48 Jeff's Forecast: Dry Friday; rain returns this weekend