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

Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

Current conditions at

HORSE THIEF (HORM8)

Lat: 46.42581°NLon: 108.6745°WElev: 3414.0ft.

NA

34°F

1°C

Humidity 47%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Wind Chill29°F (-2°C)
Last update 29 Dec 09:39 AM MST
Extended Forecast for

Roundup MT

  • Today

    Today: Sunny, with a high near 44. West southwest wind 11 to 14 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 26. West southwest wind 8 to 11 mph.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. West southwest wind 8 to 11 mph.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. West southwest wind 10 to 15 mph.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 49. Southwest wind 8 to 11 mph.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 26. West southwest wind around 8 mph.

    Low: 26 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 49. Southwest wind 8 to 11 mph.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. West southwest wind 8 to 11 mph.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 52. West southwest wind 10 to 16 mph.

    High: 52 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 44. West southwest wind 11 to 14 mph.
Tonight
Partly cloudy, with a low around 26. West southwest wind 8 to 11 mph.
Tuesday
Mostly sunny, with a high near 49. West southwest wind 8 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 30. West southwest wind 10 to 15 mph.
Wednesday
Sunny, with a high near 49. Southwest wind 8 to 11 mph.
Wednesday Night
Mostly clear, with a low around 26. West southwest wind around 8 mph.
New Year's Day
Partly sunny, with a high near 49. Southwest wind 8 to 11 mph.
Thursday Night
Mostly cloudy, with a low around 32. West southwest wind 8 to 11 mph.
Friday
Mostly cloudy, with a high near 52. West southwest wind 10 to 16 mph.
Friday Night
Mostly cloudy, with a low around 31. West southwest wind 11 to 13 mph.
Saturday
Partly sunny, with a high near 50. West southwest wind around 8 mph.
Saturday Night
Mostly cloudy, with a low around 27. West southwest wind around 6 mph.
Sunday
Partly sunny, with a high near 49. West southwest wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roundup MT
 46.45°N 108.53°W (Elev. 3219 ft)
Last Update:
4:09 am MST Dec 29, 2025
Forecast Valid:
9am MST Dec 29, 2025-6pm MST Jan 4, 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