Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

RONAN (RONM8)

Lat: 47.53639°NLon: 114.09889°WElev: 3068.0ft.

NA

38°F

3°C

Humidity 96%
Wind Speed SSW 3 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 10 Dec 03:31 AM MST
Extended Forecast for

9 Miles E St. Ignatius MT

Flood Watch until December 11, 05:00pm
Winter Weather Advisory until December 10, 11:00am
Click here for hazard details and duration
Flood Watch
Winter Weather Advisory
  •  
    Flood Watch until December 11, 05:00pm
    Winter Weather Advisory until December 10, 11:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 17 °F

    Heavy Snow

  • Wednesday

    Wednesday: Snow before 2pm, then snow, possibly mixed with rain. The snow could be heavy at times.  High near 32. Breezy, with a west southwest wind around 23 mph, with gusts as high as 46 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    High: 32 °F

    Breezy. Heavy
    Snow then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times.  Low around 28. Breezy, with a west southwest wind 25 to 29 mph, with gusts as high as 46 mph.  Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.

    Low: 28 °F

    Heavy Snow
    and Breezy

  • Thursday

    Thursday: Snow. The snow could be heavy at times.  High near 30. Breezy, with a west wind 23 to 26 mph, with gusts as high as 47 mph.  Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    High: 30 °F

    Heavy Snow
    and Breezy

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times.  Low around 26. West northwest wind 14 to 21 mph, with gusts as high as 34 mph.  Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.

    Low: 26 °F

    Heavy Snow

  • Friday

    Friday: Snow. The snow could be heavy at times.  High near 28. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 28 °F

    Heavy Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 11pm. The snow could be heavy at times.  Cloudy, with a low around 26. Breezy.  Chance of precipitation is 60%. New snow accumulation of 5 to 9 inches possible.

    Low: 26 °F

    Heavy Snow
    and Breezy

  • Saturday

    Saturday: A chance of snow.  Partly sunny, with a high near 29.

    High: 29 °F

    Chance Snow

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 17. West southwest wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 9 to 13 inches possible.
Wednesday
Snow before 2pm, then snow, possibly mixed with rain. The snow could be heavy at times. High near 32. Breezy, with a west southwest wind around 23 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Wednesday Night
Snow. The snow could be heavy at times. Low around 28. Breezy, with a west southwest wind 25 to 29 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.
Thursday
Snow. The snow could be heavy at times. High near 30. Breezy, with a west wind 23 to 26 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Thursday Night
Snow. The snow could be heavy at times. Low around 26. West northwest wind 14 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.
Friday
Snow. The snow could be heavy at times. High near 28. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Friday Night
Snow likely, mainly before 11pm. The snow could be heavy at times. Cloudy, with a low around 26. Breezy. Chance of precipitation is 60%. New snow accumulation of 5 to 9 inches possible.
Saturday
A chance of snow. Partly sunny, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
A chance of snow, mainly after 11am. Partly sunny, with a high near 29.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 25.
Monday
A chance of snow. Mostly cloudy, with a high near 27.
Monday Night
Snow. Cloudy, with a low around 24. Breezy.
Tuesday
Snow. Cloudy, with a high near 26. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles E St. Ignatius MT
 47.31°N 113.9°W (Elev. 8199 ft)
1:02 am MST Dec 10, 2025
3am MST Dec 10, 2025-6pm MST Dec 16, 2025
 
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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