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

Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Ravalli County Airport (KHRF)

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

Clear

61°F

16°C

Humidity 67%
Wind Speed SSE 5 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 19 Aug 09:15 PM MDT
Extended Forecast for

Corvallis MT

  • Tonight

    Tonight: Mostly clear, with a low around 50. Southeast wind 3 to 6 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

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

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy smoke after 11pm. Partly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Patchy Smoke

  • Friday

    Friday: Patchy smoke before 7am. Mostly sunny, with a high near 91. Calm wind becoming north around 5 mph in the afternoon.

    High: 91 °F

    Patchy Smoke
    then Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57. North northeast wind around 5 mph becoming light and variable in the evening.

    Low: 57 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 86. Chance of precipitation is 40%.

    High: 86 °F

    Slight Chance
    Rain then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 50. Southeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 90. Southeast wind around 5 mph becoming calm.
Thursday Night
Patchy smoke after 11pm. Partly cloudy, with a low around 55. Light and variable wind.
Friday
Patchy smoke before 7am. Mostly sunny, with a high near 91. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 57. North northeast wind around 5 mph becoming light and variable in the evening.
Saturday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Corvallis MT
 46.31°N 114.1°W (Elev. 3566 ft)
Last Update:
2:01 pm MDT Aug 19, 2026
Forecast Valid:
9pm MDT Aug 19, 2026-6pm MDT Aug 26, 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