National Weather Service United States Department of Commerce
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Last Map Update: Sun, Feb. 25, 2018 at 5:14:11 pm PST

National Weather Service San Francisco Bay Area, CANational Weather Service San Joaquin Valley, CANational Weather Service Las Vegas, NV
National Weather Service Honolulu, HIZoom
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National Weather Service NWS Phoenix
National Weather Service Honolulu, HINational Weather Service San Diego, CANational Weather Service San Diego, CA

A cold weather system will move into the region between Monday and Tuesday, bringing a cold and showery weather pattern to Southwest California. Chances of showers are forecast for Monday afternoon through Monday night, including the Montecito area. Showers could possibly continue through Tuesday evening, shifting eastward to L.A. County. There is a slight chance of thunderstorms that could produce higher rainfall intensities and minor debris flows during this time. Rainfall amounts up to 0.33 inches are forecast, with isolated amounts of 0.50 to 1.00 inches possible if heavier showers or thunderstorms occur. A cold air mass will spread into the region with temperatures falling below normal for this time of year. The snow level will lower to 2500 to 3000 feet Monday night, possibly bringing accumulating snow to the Grapevine portion of Interstate 5. Snow showers may also affect the Cuyama Valley and the Antelope Valley. Snow accumulations of 2-6 inches are possible above the major mountain passes. S nowfall accumulation up to 2 inches are possible on the Tejon Pass. Wintry driving conditions could develop in the local mountains and across the Antelope and Cuyama Valleys. Icy roads could impact travel, especially on Highway 33 in Ventura County, Interstate 5 through Grapevine, Highways 14 and 138 in Los Angeles County, and Highway 166 in Santa Barbara County. As the storm exits, areas of frost will be possible early Tuesday, and early Wednesday.

 

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