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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

JETTE (JETM8)

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

NA

61°F

16°C

Humidity 62%
Wind Speed SE 1 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 08 Aug 08:43 PM MDT
Extended Forecast for

Big Arm MT

  • Tonight

    Tonight: A 20 percent chance of rain before midnight. Partly cloudy, with a low around 55. West southwest wind around 6 mph becoming calm after midnight.

    Low: 55 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. West northwest wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. West wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 55. West southwest wind around 6 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 76. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 56. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 59. West wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Partly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Big Arm MT
 47.8°N 114.28°W (Elev. 3060 ft)
Last Update:
2:30 pm MDT Aug 8, 2025
Forecast Valid:
9pm MDT Aug 8, 2025-6pm MDT Aug 15, 2025
 
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