From: 2026/04/21, 11:02
To: 2026/04/22, 17:00

* WHAT...Heavy snow. Additional snow accumulations of up to 6 to 12 inches above 5000 feet, with up to 18 inches at the highest peaks. Minor accumulations of up to 2 inches possible down to 4500 feet. Southwest winds could gust as high as 50 mph. * WHERE...Northern Sierra Nevada and southern Cascades above 5000 feet, including Highway 50, Interstate 80 and Lassen Volcanic National Park. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday and Wednesday commutes. * ADDITIONAL DETAILS...Snow levels 5500 to 6500 feet today, lowering to 4500 to 5500 feet by early Wednesday. Locally lower snow levels possible in heavier convective showers. Heaviest snowfall expected this afternoon and evening with snowfall rates of 1 to 2 inches per hour at times.

From: 2026/04/21, 13:28
To: 2026/04/21, 19:30

* WHAT...Urban and small stream flooding caused by thunderstorms. * WHERE...Portions of central and northern California, including the following counties, Placer, Amador, Calaveras, El Dorado, Nevada, Sacramento, San Joaquin, Stanislaus, Sutter, Tuolumne and Yolo. * WHEN...Until 730 PM PDT Tuesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. Water over roadways. * ADDITIONAL DETAILS... - At 124 PM PDT, Doppler radar and rain gauges indicated heavy rain due to thunderstorms. Local emergency managers reported flooding. Minor flooding is ongoing or expected to begin shortly in the advisory area. Potential for isolated mud or rock slides in the foothills as the line of storms moves eastward. Between 0.5 and 1 inch of rain has fallen in the last 6 hours. - Some locations that will experience flooding include... Sacramento, Stockton, Modesto, Elk Grove, Roseville, Citrus Heights, Tracy, Folsom, Rocklin, Galt, Oakdale, Auburn, Placerville, Sonora, Jackson, Paloma, El Dorado Hills, Fair Oaks, Cameron Park and Carmichael. - http://www.weather.gov/safety/flood