Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

59°F

15°C

Humidity 48%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 18 Aug 11:10 PM MDT
Extended Forecast for

4 Miles NW St Mary MT

  • Overnight

    Overnight: Patchy smoke. Mostly clear, with a low around 51. West southwest wind around 11 mph.

    Low: 51 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke. Mostly sunny, with a high near 69. West southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 69 °F

    Patchy Smoke

  • Wednesday Night

    Wednesday Night: Patchy smoke before 11pm. Partly cloudy, with a low around 50. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 50 °F

    Patchy Smoke
    then Partly
    Cloudy

  • Thursday

    Thursday: Sunny, with a high near 67. West wind around 6 mph becoming light and variable.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. North northwest wind 5 to 7 mph becoming light and variable  after midnight.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72. Calm wind becoming east southeast 5 to 7 mph in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after midnight.  Mostly cloudy, with a low around 55. East wind around 7 mph becoming south southwest after midnight.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 71. Southwest wind 5 to 11 mph.

    High: 71 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy smoke. Mostly clear, with a low around 51. West southwest wind around 11 mph.
Wednesday
Patchy smoke. Mostly sunny, with a high near 69. West southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Patchy smoke before 11pm. Partly cloudy, with a low around 50. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 67. West wind around 6 mph becoming light and variable.
Thursday Night
Mostly clear, with a low around 49. North northwest wind 5 to 7 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 72. Calm wind becoming east southeast 5 to 7 mph in the afternoon.
Friday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 55. East wind around 7 mph becoming south southwest after midnight.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 71. Southwest wind 5 to 11 mph.
Saturday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 51.
Sunday
Sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW St Mary MT
 48.78°N 113.48°W (Elev. 6329 ft)
12:31 pm MDT Aug 18, 2026
12am MDT Aug 19, 2026-6pm MDT Aug 25, 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