Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

64°F

18°C

Humidity 43%
Wind Speed NA 1 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 17 Aug 08:10 PM MDT
Extended Forecast for

4 Miles W St Mary MT

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before midnight.  Patchy smoke. Partly cloudy, with a low around 48. West wind 5 to 9 mph.

    Low: 48 °F

    Slight Chance
    T-storms then
    Patchy Smoke

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms between 1pm and 5pm.  Patchy smoke. Partly sunny, with a high near 62. West wind 8 to 15 mph, with gusts as high as 23 mph.  Chance of precipitation is 20%.

    High: 62 °F

    Patchy Smoke
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Patchy smoke. Mostly clear, with a low around 49. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 49 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 64. West southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 64 °F

    Patchy Smoke
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. West southwest wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 63. West wind 5 to 7 mph becoming north northeast in the afternoon.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. East wind 5 to 8 mph becoming southwest after midnight.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 67. West southwest wind 5 to 7 mph becoming south southeast in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after midnight.  Mostly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before midnight. Patchy smoke. Partly cloudy, with a low around 48. West wind 5 to 9 mph.
Tuesday
A slight chance of showers and thunderstorms between 1pm and 5pm. Patchy smoke. Partly sunny, with a high near 62. West wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Tuesday Night
Patchy smoke. Mostly clear, with a low around 49. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Wednesday
Patchy smoke before 7am. Sunny, with a high near 64. West southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 48. West southwest wind 7 to 13 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 63. West wind 5 to 7 mph becoming north northeast in the afternoon.
Thursday Night
Mostly clear, with a low around 48. East wind 5 to 8 mph becoming southwest after midnight.
Friday
Mostly sunny, with a high near 67. West southwest wind 5 to 7 mph becoming south southeast in the afternoon.
Friday Night
A slight chance of showers after midnight. Mostly cloudy, with a low around 53.
Saturday
A chance of showers. Partly sunny, with a high near 65.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 48. Breezy.
Sunday
A slight chance of showers. Mostly sunny, with a high near 57. Breezy.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W St Mary MT
 48.73°N 113.53°W (Elev. 6778 ft)
12:32 pm MDT Aug 17, 2026
8pm MDT Aug 17, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database