National Weather Service United States Department of Commerce

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >


A Pacific Storm Moves Through
the Area at Midweek

A Pacific storm off the southern California coast will move ashore Wednesday evening before tracking eastward across southern Nevada, southern Utah and onto the Four Corners region by Thursday morning. Though the arrival of the storm's center is a ways out, its impacts will be felt as early as Wednesday morning across southeast Utah and southwest Colorado as isolated to scattered light showers develop. A wintry mix of weather will spread north and eastward across the region as Wednesday progresses with the best chances for precipitation coming Wednesday night into Thursday morning as the storm moves to the Four Corners region.  The latest model output suggests snowfall amounts of up to one foot are possible over portions of the San Juan Mountains and up to 8 inches across the La Sal, Abajo Mountains of southeast Utah and portions of the Uncompahgre Plateau and Grand Mesa in western Colorado. Conditions improve later on Thursday as the storm shifts to the southern Plains during the afternoon.

 

Storm Track
5 PM this evening to 5 AM Thursday 12/5

Total Snow Forecast
Tonight through 5 AM, December 6