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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

FLATTOP MTN. (FTMM8)

Lat: 48.80225°NLon: 113.85713°WElev: 6300.0ft.

NA

35°F

2°C

Humidity 94%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 15 Nov 05:00 PM MST
Extended Forecast for

16 Miles W St Mary MT

  • Tonight

    Tonight: A slight chance of snow before 8pm, then a slight chance of rain and snow after 4am. Cloudy, with a low around 29. Southwest wind 8 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: A slight chance of rain and snow before 9am, then a chance of rain and snow after 4pm. Mostly cloudy, with a high near 33. South southwest wind around 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 33 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain before 2am, then a chance of rain and snow. Cloudy, with a low around 29. Southwest wind 6 to 9 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 29 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Monday

    Monday: A chance of rain and snow before 8am, then snow likely. Cloudy, with a high near 31. West southwest wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Monday Night

    Monday Night: Snow. Low around 24. West southwest wind around 9 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 24 °F

    Snow

  • Tuesday

    Tuesday: Snow. High near 26. West southwest wind 7 to 10 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 26 °F

    Snow

  • Tuesday Night

    Tuesday Night: Snow likely. Cloudy, with a low around 17. West southwest wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 17 °F

    Snow Likely

  • Wednesday

    Wednesday: A chance of snow. Mostly cloudy, with a high near 21. West southwest wind around 9 mph.

    High: 21 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A slight chance of snow. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow

Detailed Forecast

Tonight
A slight chance of snow before 8pm, then a slight chance of rain and snow after 4am. Cloudy, with a low around 29. Southwest wind 8 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday
A slight chance of rain and snow before 9am, then a chance of rain and snow after 4pm. Mostly cloudy, with a high near 33. South southwest wind around 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday Night
A chance of rain before 2am, then a chance of rain and snow. Cloudy, with a low around 29. Southwest wind 6 to 9 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Monday
A chance of rain and snow before 8am, then snow likely. Cloudy, with a high near 31. West southwest wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night
Snow. Low around 24. West southwest wind around 9 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Snow. High near 26. West southwest wind 7 to 10 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Tuesday Night
Snow likely. Cloudy, with a low around 17. West southwest wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Wednesday
A chance of snow. Mostly cloudy, with a high near 21. West southwest wind around 9 mph.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 18.
Thursday
A chance of snow, mainly after 11am. Partly sunny, with a high near 23.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 19.
Friday
A chance of snow. Partly sunny, with a high near 23.
Friday Night
A chance of snow. Mostly cloudy, with a low around 19. Breezy.
Saturday
A chance of snow. Mostly cloudy, with a high near 23.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles W St Mary MT
 48.79°N 113.77°W (Elev. 7480 ft)
Last Update:
2:18 pm MST Nov 15, 2025
Forecast Valid:
6pm MST Nov 15, 2025-6pm MST Nov 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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