As of about 8 a.m., the heaviest rain was falling in the Sierra foothills, from Nevada County down to Calaveras County, along with areas east of Modesto and Turlock.
Expect a slick morning commute as you head out today. We’re getting multiple reports of backed-up storm drains causing problems across the valley. ?️Light snow is falling over the mountain passes and should begin to stick soon. ❄️ #cawx @CBSSacramento pic.twitter.com/kHjCZjNurd
— Ashley Nanfria (@ashleynanfria) April 21, 2026According to the National Weather Service, thunderstorms are most likely between 10 a.m. and 8 p.m.
In the Sierra, a Winter Storm Warning remains in effect through 5 p.m. Wednesday. Snowfall rates of up to 1-2 inches per hour is expected through Tuesday night. Up to 12 to 18 inches of snow is expected above 5,000 feet elevation, with up to 2 feet of snow on the highest peaks.
Alongside widespread rainfall, periods of moderate to heavy mountain snowfall are expected across the Sierra/southern Cascades today into Wednesday. As a result, a Winter Storm Warning remains in effect thru 5 pm Wednesday for the Sierra/southern Cascades above 5000'❄️#CAwx pic.twitter.com/QgI380YSfX
— NWS Sacramento (@NWSSacramento) April 21, 2026Forecasters said travelers in the Sierra should expect significant reductions in visibility and the potential for major travel delays.
As of 8:30 a.m., there are no chain controls in effect along Interstate 80 or Highway 50.
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