Travel & RV Weather Forecast a.m. Sunday 12 December 2021

** High Impact Weather for California tonight and Sunday **

  • Strong, slow-moving storm spreads inches of rain and feet of mountain snows into central California, across the Great Basin and into the northern Rockies through Tuesday.
  • Expect passes across the Sierra Nevada to close late today and Monday.
  • High winds today over the northern and Central Rockies, and tomorrow across the Sierra and Great Basin.
  • Quiet and mild weather in the East.

For details, check out the latest weather animations.

Here’s the long-range travel & RV weather outlook (next update: later today)

— Coastal northern and central OR above 1500 feet: Winter Weather Advisories this evening though Monday evening. 3-7 inches snow likely.

— South-central OR: Winter Storm Warnings and Advisories through Monday night. 6-16 inches snow expected. Snow tapers off this morning but resumes Sunday evening.

— Northern CA above 3000 feet: Winter Storm Warnings through Monday night. 10-30 inches snow expected. Snow tapers off this morning but resumes Sunday night. I-5 highly impacted.

— CA Sierra Nevada Mountains above 3500 feet: Winter Storm Warnings through Tuesday night. Expect an additional 3-5 feet of snow with some locations seeing 6 feet. Gusts to 50 mph in lower elevations and wind gusts to 100 mph at the higher peaks. Expect I-80, US-50 and other major passes will be shut down during this storm.

— CA Sacramento and San Joaquin Valleys: Wind Advisories Monday. Gusts 45-50. I-5, I-80, CA-99 impacted.

— CA Central Coast including the Bay Area: Wind Advisory this afternoon through Monday morning. Gusts to 55 mph. I-80, US-101 impacted.

— CA Central Coast: Slight risk of flash flooding tonight and Monday from heavy rains. Up to 4-8 inches rain possible in the Big Sur Mountains. US-101, CA-1 potentially impacted.

— CA southern Central Coast, San Luis Obispo and Santa Barbara Mountains: High Wind Watch Monday evening through Tuesday morning. Gusts to 60 mph. US-101 impacted.

— Southern CA northeast of Los Angeles and San Diego County mountains and deserts: High Wind Watches late Monday night through Tuesday night. Gusts 65-75 mph. I-8, I-15 impacted.

— Central and Southern NV: Winter Storm Warnings and Watches late Monday night through early Wednesday morning above 5000 feet. Expect 6-14 inches snow. Highest accumulations above 7000 feet where storm will likely remain all snow. Winds to gust up to 45 mph. US-50 impacted.

— ID north of I-84, western MT, northwest WY: Winter Storm Warnings and Advisories through Tuesday night for much of the region. Heaviest snows in southern ID with 12-18 inches at pass levels. MT snow accumulations generally 4-10 inches and 6-12 inches for WY. I-15, I-90 impacted.

— South-central MT: High Wind Warning today in the Livingston and Beartooth foothills. Gusts to 75 mph. I-90 highly impacted.

— Northwest, central and southeast WY: High Wind Warnings today. Gusts 60-70 mph. I-25, I-80 impacted.

— Northeast WY: Winter Weather Advisory today for Blowing Snow and gusts to 55 mph. Warned area just south of I-90 and east of I-25.

— Northern ME: Wind Advisory through early this afternoon. Gusts 45-50 mph. I-95 impacted.

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