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

50°F

10°C

Humidity 71%
Wind Speed NA 2 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 19 Aug 05:10 AM MDT
Extended Forecast for

5 Miles SW St Mary MT

  • Today

    Today: Patchy smoke before 9am. Partly sunny, then gradually becoming sunny, with a high near 77. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 77 °F

    Patchy Smoke
    then Sunny

  • Tonight

    Tonight: Patchy smoke before 1am. Partly cloudy, with a low around 49. West southwest wind 3 to 8 mph.

    Low: 49 °F

    Patchy Smoke

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 79. West southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.

    High: 79 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 52. East southeast wind around 6 mph becoming light and variable  after midnight.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 81. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 49. Southwest wind 8 to 15 mph, with gusts as high as 33 mph.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Patchy smoke before 9am. Partly sunny, then gradually becoming sunny, with a high near 77. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Tonight
Patchy smoke before 1am. Partly cloudy, with a low around 49. West southwest wind 3 to 8 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 79. West southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 47. West wind 5 to 7 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 52. East southeast wind around 6 mph becoming light and variable after midnight.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Southwest wind 8 to 15 mph, with gusts as high as 33 mph.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW St Mary MT
 48.69°N 113.52°W (Elev. 4491 ft)
4:16 am MDT Aug 19, 2026
5am MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
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Additional Resources

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