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

Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East

A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

Comertown Turn-Off MT-5 MP 13.4 (MTCOM)

Lat: 48.81°NLon: 104.2529°WElev: 2359.0ft.

NA

-23°F

-31°C

Humidity 62%
Wind Speed WSW 11 MPH
Barometer NA
Dewpoint -32°F (-36°C)
Visibility NA
Wind Chill-45°F (-43°C)
Last update 23 Jan 08:45 PM MST
Extended Forecast for

Westby MT

Extreme Cold Warning January 23, 09:09pm until January 25, 01:00pm
Click here for hazard details and duration
Extreme Cold Warning
  •  
    Extreme Cold Warning January 23, 09:09pm until January 25, 01:00pm

    NOW until 1:00pm Sun

    Extreme Cold Warning

  • Tonight

    Low: -30 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near -5. Wind chill values between -30 and -40. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: -5 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -28. Wind chill values between -35 and -45. North northwest wind 6 to 8 mph.

    Low: -28 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny and cold, with a high near -5. Wind chill values between -35 and -45. Northwest wind 6 to 10 mph becoming southwest in the afternoon.

    High: -5 °F

    Cold

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -12. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: -12 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 13. West southwest wind 14 to 18 mph becoming northwest in the morning. Winds could gust as high as 26 mph.

    High: 13 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around -7. Northwest wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: -7 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 13. West wind 6 to 8 mph.

    High: 13 °F

    Partly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around -30. Wind chill values between -45 and -50. South wind 5 to 8 mph.
Saturday
Mostly cloudy and cold, with a high near -5. Wind chill values between -30 and -40. Calm wind becoming north northeast around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -28. Wind chill values between -35 and -45. North northwest wind 6 to 8 mph.
Sunday
Sunny and cold, with a high near -5. Wind chill values between -35 and -45. Northwest wind 6 to 10 mph becoming southwest in the afternoon.
Sunday Night
Partly cloudy, with a low around -12. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 13. West southwest wind 14 to 18 mph becoming northwest in the morning. Winds could gust as high as 26 mph.
Monday Night
Mostly cloudy, with a low around -7. Northwest wind 7 to 13 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 13. West wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 0. Northwest wind around 8 mph.
Wednesday
Partly sunny, with a high near 13. North northwest wind around 8 mph.
Wednesday Night
Mostly cloudy, with a low around 0. East southeast wind around 7 mph.
Thursday
Partly sunny, with a high near 15.
Thursday Night
Mostly cloudy, with a low around 0.
Friday
Partly sunny, with a high near 18.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.89°N 104.06°W (Elev. 1949 ft)
Last Update:
1:50 pm MST Jan 23, 2026
Forecast Valid:
9pm MST Jan 23, 2026-6pm MST Jan 30, 2026
 
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