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

Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Current conditions at

JETTE (JETM8)

Lat: 47.76706°NLon: 114.23378°WElev: 3593.0ft.

NA

70°F

21°C

Humidity 39%
Wind Speed N 1 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 01 Sep 10:43 AM MDT
Extended Forecast for

Big Arm MT

  • Today

    Today: Mostly sunny, with a high near 82. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 57. Southwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 48. South southwest wind 5 to 9 mph becoming calm after midnight. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before noon. Mostly cloudy, with a high near 62. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Partly sunny, with a high near 65.

    High: 65 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of rain. Partly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 82. Calm wind becoming east northeast around 5 mph in the afternoon.
Tonight
A 30 percent chance of showers between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 57. Southwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Wednesday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 48. South southwest wind 5 to 9 mph becoming calm after midnight. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers likely, mainly before noon. Mostly cloudy, with a high near 62. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Friday
A 20 percent chance of showers before noon. Partly sunny, with a high near 65.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 47.
Saturday
Partly sunny, with a high near 70.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 51.
Sunday
A slight chance of rain. Partly sunny, with a high near 72.
Sunday Night
Rain likely. Mostly cloudy, with a low around 53.
Labor Day
A chance of rain. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Big Arm MT
 47.82°N 114.32°W (Elev. 3045 ft)
Last Update:
2:01 am MDT Sep 1, 2026
Forecast Valid:
11am MDT Sep 1, 2026-6pm MDT Sep 7, 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