National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

ROLLA (K06D)

Lat: 48.88°NLon: 99.62°WElev: 1824ft.

Fog/Mist

12°F

-11°C

Humidity 85%
Wind Speed NA
Barometer 29.76 in
Dewpoint 9°F (-13°C)
Visibility 1.75 mi
Last update 26 Dec 3:55 am CST
Extended Forecast for

Shell Valley ND

  • Today

    Today: Patchy fog. Otherwise, cloudy, with a high near 22. West wind around 6 mph becoming calm.

    High: 22 °F

    Patchy Fog

  • Tonight

    Tonight: A slight chance of freezing rain before 11pm, then a slight chance of freezing rain after 5am. Patchy fog. Otherwise, cloudy, with a steady temperature around 19. Southeast wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 20%.

    Low: 19 °F

    Slight Chance
    Freezing Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before noon. Otherwise, mostly cloudy, with a temperature falling to around 15 by 5pm. Southwest wind 6 to 10 mph becoming northeast in the morning.

    High: 19 °F⇓

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around -3. Wind chill values as low as -20. Northwest wind 10 to 15 mph, with gusts as high as 23 mph.

    Low: -3 °F

    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Mostly cloudy and cold, with a high near 2. Northwest wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 2 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -12. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    Low: -12 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 16. Southwest wind 6 to 9 mph.

    High: 16 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 4. West wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 4 °F

    Chance Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 26. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 26 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy fog. Otherwise, cloudy, with a high near 22. West wind around 6 mph becoming calm.
Tonight
A slight chance of freezing rain before 11pm, then a slight chance of freezing rain after 5am. Patchy fog. Otherwise, cloudy, with a steady temperature around 19. Southeast wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 20%.
Saturday
Patchy fog before noon. Otherwise, mostly cloudy, with a temperature falling to around 15 by 5pm. Southwest wind 6 to 10 mph becoming northeast in the morning.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around -3. Wind chill values as low as -20. Northwest wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday
A 20 percent chance of snow before noon. Mostly cloudy and cold, with a high near 2. Northwest wind 15 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Partly cloudy, with a low around -12. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday
Mostly sunny, with a high near 16. Southwest wind 6 to 9 mph.
Monday Night
A chance of snow. Mostly cloudy, with a low around 4. West wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 26. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of snow before midnight. Mostly cloudy, with a low around -8. North wind 7 to 9 mph.
Wednesday
Partly sunny and cold, with a high near 1. North wind 7 to 10 mph.
Wednesday Night
Partly cloudy, with a low around -14. Northwest wind around 8 mph.
New Year's Day
Mostly sunny and cold, with a high near -2. Northwest wind 7 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Shell Valley ND
 48.8°N 99.85°W
Last Update:
3:36 am CST Dec 26, 2025
Forecast Valid:
4am CST Dec 26, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation