Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

HELENA (HRWM8)

Lat: 46.73167°NLon: 112.01917°WElev: 3800.0ft.

NA

70°F

21°C

Humidity 45%
Wind Speed SE 6 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 21 Sep 01:53 PM MDT
Extended Forecast for

3 Miles SW Marysville MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 63. Southwest wind around 5 mph.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. Calm wind becoming south southwest 5 to 8 mph in the evening.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 63. Southwest wind 3 to 8 mph.

    High: 63 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 5 to 10 mph.

    Low: 45 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 63. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46. Southwest wind 5 to 7 mph.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 67. South southeast wind 6 to 8 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. South wind 6 to 10 mph.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 63. Southwest wind around 5 mph.
Tonight
Mostly clear, with a low around 45. Calm wind becoming south southwest 5 to 8 mph in the evening.
Tuesday
Increasing clouds, with a high near 63. Southwest wind 3 to 8 mph.
Tuesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 63. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 46. Southwest wind 5 to 7 mph.
Thursday
Sunny, with a high near 67. South southeast wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 49. South wind 6 to 10 mph.
Friday
Mostly sunny, with a high near 62.
Friday Night
A slight chance of rain after midnight. Partly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Marysville MT
 46.73°N 112.35°W (Elev. 6768 ft)
12:31 pm MDT Sep 21, 2026
2pm MDT Sep 21, 2026-6pm MDT Sep 27, 2026
 
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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