National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

Current conditions at

Ravalli County Airport (KHRF)

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

Clear

75°F

24°C

Humidity 50%
Wind Speed N 10 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 12:35 PM MDT
Extended Forecast for

Corvallis MT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. West northwest wind around 9 mph.

    High: 84 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 48. Northwest wind 5 to 9 mph becoming south southeast after midnight.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. South southeast wind around 5 mph becoming calm in the morning.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 90. South wind around 5 mph becoming calm.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. West northwest wind around 9 mph.
Tonight
Mostly clear, with a low around 48. Northwest wind 5 to 9 mph becoming south southeast after midnight.
Wednesday
Sunny, with a high near 85. South southeast wind around 5 mph becoming calm in the morning.
Wednesday Night
Partly cloudy, with a low around 49. Calm wind becoming south southwest around 5 mph after midnight.
Thursday
Sunny, with a high near 90. South wind around 5 mph becoming calm.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 90.
Friday Night
A slight chance of rain before midnight. Mostly cloudy, with a low around 55.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 85.
Saturday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Corvallis MT
 46.3°N 114.13°W (Elev. 3510 ft)
Last Update:
2:00 pm MDT Aug 18, 2026
Forecast Valid:
3pm MDT Aug 18, 2026-6pm MDT Aug 25, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation