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

Ravalli County Airport (KHRF)

Lat: 46.25463°NLon: 114.1246°WElev: 3644.0ft.

Partly Cloudy

64°F

18°C

Humidity 72%
Wind Speed NW 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 12:35 AM MDT
Extended Forecast for

Corvallis MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. Light south southeast wind.

    Low: 52 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain before 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm.  Mostly cloudy, then gradually becoming sunny, with a high near 83. Calm wind becoming west northwest around 6 mph in the afternoon.  Chance of precipitation is 20%.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49. Northwest wind around 6 mph becoming light and variable.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. West northwest wind around 5 mph becoming light and variable  after midnight.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of rain after midnight.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. Light south southeast wind.
Tuesday
A slight chance of rain before 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 49. Northwest wind around 6 mph becoming light and variable.
Wednesday
Sunny, with a high near 85. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 50. West northwest wind around 5 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 55.
Friday
Mostly sunny, with a high near 90.
Friday Night
A slight chance of rain after midnight. Mostly cloudy, with a low around 56.
Saturday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 85.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 49.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Corvallis MT
 46.31°N 114.1°W (Elev. 3566 ft)
12:21 am MDT Aug 18, 2026
12am MDT Aug 18, 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