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- Rain and snow today for parts of the Pacific Northwest and Northern Rockies; storms resume Tuesday afternoon. Storms starting Tuesday may continue for five days.
- Developing low pressure in the Gulf of Mexico will spread rain showers and thunderstorms over much of Florida tonight and Tuesday.
- Some snow for the Northern Plains and Upper Midwest tonight and Tuesday.
For details, check out the latest weather animations.
Here’s the long-range travel & RV weather outlook (updated yesterday evening)
— WA and OR Cascades, northern OR, southern WA, northern ID, northwest MT: Winter Storm Warnings and Advisories through late this afternoon. Additional snow accumulations will vary between a few inches in the valleys to 5-10 inches in the Cascades. I-84, I-90 impacted.
— West-central OR: Flood Watch through this morning. I-5 potentially impacted.
— Northwest NV: Freezing Fog Advisory through late this morning. I-80, US-50 impacted.
— Northern CA and CA Sierra Nevada Range: Winter Storm Watches Tuesday evening through Sunday(!) afternoon. This will be a 5-day snow event. Snow levels 4500-5000 feet. Accumulations may range from 1-3 feet at lower elevations to 5-7 feet on the higher passes. I-5, I-80, US-50 have the potential to be highly impacted.
— Central CA: Dense Fog Advisory through midday today for the San Joaquin Valley. I-5, CA-99 impacted.
— East-central, south-central MT: Winter Weather Advisories through early afternoon. 1-3 inches snow expected.
— South-central MT Livingston area and Beartooth Foothills. Wind Advisory this evening through midday Wednesday. Gusts to 65 mph. I-90, US-191 impacted.
— Southeast and east-central WY: High Wind Warnings and Watches this evening through midday Tuesday. Gusts 60-70 mph. I-25, I-80 impacted.
— MT Southern Big Horn Mountains and WY Sheridan Foothills: Winter Weather Advisory for freezing drizzle, freezing fog and light snow through midday today. I-25/I-90 very slick.
— Northwest WY Cody Foothills: High Wind Warning this afternoon through Tuesday morning. Gusts 60-75 mph.
— Eastern ND, northern MN, northern WI: Snow late tonight and Tuesday spreading west to each. Accumulations generally 1-3 inches. No warnings currently issued. I-29, I-35, I-94 impacted.
— FL Peninsula: Expect some strong or possibly severe thunderstorms tonight and Tuesday. Some localized flooding possible on the Space Coast. I-4, I-75, I-95 impacted.
National Weather Service Warnings Watches and Advisories issued Monday morning 20 December Monday 20 December Wind Gusts Monday afternoon 20 December Snowfall accumulation through Monday evening 20 December High temperatures Monday 20 December Low temperatures Tuesday morning 21 December Tuesday 21 December Wind gusts Tuesday afternoon 21 December Total snowfall accumulation through Tuesday evening 21 December Total precipitation amounts through Tuesday evening 21 December High temperatures Tuesday 21 December Wednesday 22 December Wind Gusts Wednesday afternoon 22 December High temperatures Wednesday 22 December
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