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

Sieben I-15 MP 216 (MTSBN)

Lat: 46.88748267°NLon: 112.1111196°WElev: 4199.0ft.

NA

71°F

22°C

Humidity 19%
Wind Speed SE 7 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 08 Oct 05:15 PM MDT
Extended Forecast for

6 Miles WNW Marysville MT

  • Tonight

    Tonight: Mostly clear, with a low around 40. Southwest wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63. Calm wind becoming east northeast 5 to 8 mph in the morning.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. Northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers. Mostly sunny, with a high near 72. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 72 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 47. South wind around 7 mph.

    Low: 47 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after noon. High near 57. Southwest wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.

    High: 57 °F

    Showers

  • Saturday Night

    Saturday Night: Rain showers likely before midnight, then rain likely between midnight and 3am, then rain likely, possibly mixed with snow after 3am. Some thunder is also possible. Mostly cloudy, with a low around 35. West wind 9 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Sunday

    Sunday: Rain and snow, becoming all snow after noon. Mostly cloudy, with a high near 41. West wind 8 to 13 mph, with gusts as high as 24 mph.

    High: 41 °F

    Rain/Snow
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow likely. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Snow Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 40. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 63. Calm wind becoming east northeast 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 43. Northeast wind 5 to 7 mph becoming calm after midnight.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 72. Calm wind becoming south 5 to 8 mph in the afternoon.
Friday Night
A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 47. South wind around 7 mph.
Saturday
Showers, with thunderstorms also possible after noon. High near 57. Southwest wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Saturday Night
Rain showers likely before midnight, then rain likely between midnight and 3am, then rain likely, possibly mixed with snow after 3am. Some thunder is also possible. Mostly cloudy, with a low around 35. West wind 9 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Sunday
Rain and snow, becoming all snow after noon. Mostly cloudy, with a high near 41. West wind 8 to 13 mph, with gusts as high as 24 mph.
Sunday Night
Snow likely. Mostly cloudy, with a low around 28.
Columbus Day
A chance of snow. Mostly cloudy, with a high near 38.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 28.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 41.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 30.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WNW Marysville MT
 46.78°N 112.42°W (Elev. 4905 ft)
Last Update:
2:13 am MDT Oct 8, 2025
Forecast Valid:
5pm 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