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

Heavy to Excessive Rainfall for the Southwest U.S.; Watching for Possible East Coast Storm

Thunderstorms and a chance for some isolated flash flooding will continue today in the Southwest U.S. before an influx of tropical moisture from Priscilla brings widespread heavy rainfall and a flash flooding threat late this week into this weekend. A coastal storm may develop off the southeast U.S. coast Friday night and drift north just off the Mid-Atlantic coast through the weekend. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

Lat: 47.47333°NLon: 111.38222°WElev: 3675.0ft.

Clear

73°F

23°C

Humidity 17%
Wind Speed SW 13 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 08 Oct 03:05 PM MDT
Extended Forecast for

Ulm MT

  • Tonight

    Tonight: Mostly clear, with a low around 34. West southwest wind 5 to 7 mph becoming calm after midnight.

    Low: 34 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Northeast wind around 6 mph becoming calm after midnight.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77. Calm wind becoming south southeast 5 to 8 mph in the afternoon.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 46. South southwest wind 7 to 9 mph.

    Low: 46 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 69. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 33. West wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 33 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of rain before noon, then a chance of rain and snow. Partly sunny, with a high near 48. West wind 14 to 16 mph, with gusts as high as 24 mph.

    High: 48 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain and snow. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 34. West southwest wind 5 to 7 mph becoming calm after midnight.
Thursday
Sunny, with a high near 65. Calm wind becoming northeast around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 34. Northeast wind around 6 mph becoming calm after midnight.
Friday
Sunny, with a high near 77. Calm wind becoming south southeast 5 to 8 mph in the afternoon.
Friday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 46. South southwest wind 7 to 9 mph.
Saturday
Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 69. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 33. West wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Sunday
A chance of rain before noon, then a chance of rain and snow. Partly sunny, with a high near 48. West wind 14 to 16 mph, with gusts as high as 24 mph.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 24.
Columbus Day
A chance of snow before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 42.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 25.
Tuesday
A slight chance of rain and snow. Partly sunny, with a high near 46.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 27.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ulm MT
 47.43°N 111.51°W (Elev. 3392 ft)
Last Update:
2:13 am MDT Oct 8, 2025
Forecast Valid:
3pm MDT Oct 8, 2025-6pm MDT Oct 15, 2025
 
Forecast Discussion
 
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Additional Resources

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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