Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

FLATTOP MTN. (FTMM8)

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

NA

30°F

-1°C

Humidity 92%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 21 Mar 12:00 PM MDT
Extended Forecast for

16 Miles W St Mary MT

  • This Afternoon

    This Afternoon: Snow likely, mainly before 2pm.  Mostly cloudy, with a high near 28. West southwest wind 13 to 18 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 28 °F

    Snow Likely

  • Tonight

    Tonight: A 20 percent chance of snow before 7pm.  Mostly cloudy, with a low around 17. West southwest wind 16 to 18 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 27. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 33 mph.

    High: 27 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 18. Breezy, with a southwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 30 mph.

    Low: 18 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33. Southwest wind 11 to 17 mph, with gusts as high as 24 mph.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23. West southwest wind 11 to 16 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Snow, mainly after noon.  High near 30. Southwest wind 11 to 16 mph, with gusts as high as 24 mph.  Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    High: 30 °F

    Chance Snow
    then Snow

  • Tuesday Night

    Tuesday Night: Snow, mainly before midnight.  Mostly cloudy, with a low around 25. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 32 mph.

    Low: 25 °F

    Snow and
    Breezy

  • Wednesday

    Wednesday: Snow likely, mainly after noon.  Mostly cloudy, with a high near 29. Breezy.

    High: 29 °F

    Snow Likely
    and Breezy

Detailed Forecast

This Afternoon
Snow likely, mainly before 2pm. Mostly cloudy, with a high near 28. West southwest wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
A 20 percent chance of snow before 7pm. Mostly cloudy, with a low around 17. West southwest wind 16 to 18 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 27. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 33 mph.
Sunday Night
Partly cloudy, with a low around 18. Breezy, with a southwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 30 mph.
Monday
Mostly sunny, with a high near 33. Southwest wind 11 to 17 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 23. West southwest wind 11 to 16 mph, with gusts as high as 21 mph.
Tuesday
Snow, mainly after noon. High near 30. Southwest wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Tuesday Night
Snow, mainly before midnight. Mostly cloudy, with a low around 25. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 32 mph.
Wednesday
Snow likely, mainly after noon. Mostly cloudy, with a high near 29. Breezy.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 15. Breezy.
Thursday
A chance of snow. Mostly cloudy, with a high near 24.
Thursday Night
A chance of snow. Partly cloudy, with a low around 13.
Friday
A slight chance of snow. Mostly sunny, with a high near 28.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles W St Mary MT
 48.79°N 113.77°W (Elev. 7480 ft)
12:26 pm MDT Mar 21, 2026
12pm MDT Mar 21, 2026-6pm MDT Mar 27, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database