Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

NA

50°F

10°C

Humidity 77%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 20 Jun 07:10 AM MDT
Extended Forecast for

5 Miles SW St Mary MT

Winter Storm Warning June 21, 09:00am until June 22, 12:00pm
Click here for hazard details and duration
Winter Storm Warning
  • Today

    Today: Showers, with thunderstorms also possible after 3pm. Some of the storms could produce heavy rainfall.  High near 54. Northeast wind around 8 mph becoming west southwest in the afternoon.  Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 54 °F

    Heavy Rain

  • Tonight

    Tonight: Showers and thunderstorms.  Low around 34. West southwest wind 6 to 14 mph, with gusts as high as 28 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Showers

  • Saturday

    Saturday: Rain.  High near 44. West southwest wind 15 to 18 mph, with gusts as high as 36 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 44 °F

    Rain

  • Saturday Night

    Saturday Night: Rain.  Low around 31. West wind 9 to 13 mph, with gusts as high as 26 mph.  Chance of precipitation is 100%.

    Low: 31 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: Rain likely before noon, then showers likely after noon.  Cloudy, with a high near 48. North northwest wind around 8 mph.  Chance of precipitation is 70%.

    High: 48 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before midnight.  Mostly cloudy, with a low around 31. West southwest wind around 7 mph.  Chance of precipitation is 60%.

    Low: 31 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 53. West southwest wind 7 to 9 mph.  Chance of precipitation is 70%.

    High: 53 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers before midnight.  Partly cloudy, with a low around 33. Southwest wind 5 to 8 mph.

    Low: 33 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers after noon.  Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Today
Showers, with thunderstorms also possible after 3pm. Some of the storms could produce heavy rainfall. High near 54. Northeast wind around 8 mph becoming west southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
Showers and thunderstorms. Low around 34. West southwest wind 6 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain. High near 44. West southwest wind 15 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Saturday Night
Rain. Low around 31. West wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 100%.
Sunday
Rain likely before noon, then showers likely after noon. Cloudy, with a high near 48. North northwest wind around 8 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 31. West southwest wind around 7 mph. Chance of precipitation is 60%.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 53. West southwest wind 7 to 9 mph. Chance of precipitation is 70%.
Monday Night
A chance of showers before midnight. Partly cloudy, with a low around 33. Southwest wind 5 to 8 mph.
Tuesday
A slight chance of showers after noon. Mostly sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW St Mary MT
 48.69°N 113.52°W (Elev. 4491 ft)
3:25 am MDT Jun 20, 2025
7am MDT Jun 20, 2025-6pm MDT Jun 26, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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