Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

BIG SHEEP MOUNTAIN (LCFM8)

Lat: 47.02819°NLon: 105.80472°WElev: 3172.0ft.

NA

28°F

-2°C

Humidity 99%
Wind Speed SSE 11 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill18°F (-8°C)
Last update 10 Dec 08:08 AM MST
Extended Forecast for

10 Miles NW Rock Springs MT

Winter Storm Watch December 11, 08:00pm until December 13, 11:00am
Winter Weather Advisory until December 11, 08:00pm
Click here for hazard details and duration
Winter Storm Watch
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 11, 08:00pm

    NOW until 8:00pm Thu

    Winter Weather Advisory

  • Today

    High: 42 °F

    Snow Likely
    then
    Rain/Snow

  • Tonight

    Tonight: Rain likely, mainly between 11pm and 3am.  Cloudy, with a steady temperature around 40. West wind 11 to 17 mph.  Chance of precipitation is 60%.

    Low: 40 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely before 3pm, then rain likely, possibly mixed with snow between 3pm and 4pm, then snow likely after 4pm.  Cloudy, with a temperature rising to near 42 by 11am, then falling to around 27 during the remainder of the day. Breezy, with a west wind 16 to 24 mph, with gusts as high as 30 mph.  Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain Likely
    then
    Rain/Snow
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow.  Cloudy, with a low around 2. Wind chill values between -10 and zero. North wind 14 to 20 mph, with gusts as high as 25 mph.  New snow accumulation of less than a half inch possible.

    Low: 2 °F

    Chance Snow

  • Friday

    Friday: Snow likely, mainly after 11am.  Cloudy, with a high near 9. Northeast wind 7 to 10 mph.  Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 9 °F

    Snow Likely

  • Friday Night

    Friday Night: Snow. The snow could be heavy at times.  Low around -2. East northeast wind 7 to 10 mph.  Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.

    Low: -2 °F

    Heavy Snow

  • Saturday

    Saturday: A 30 percent chance of snow before 11am.  Mostly cloudy, with a high near 9. North northeast wind 7 to 10 mph becoming east southeast in the afternoon.  Little or no snow accumulation expected.

    High: 9 °F

    Chance Snow
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 0. Southeast wind 7 to 10 mph.

    Low: 0 °F

    Mostly Cloudy

Detailed Forecast

Today
Snow before 2pm, then rain and snow likely between 2pm and 3pm, then a chance of rain after 3pm. High near 42. South southeast wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Rain likely, mainly between 11pm and 3am. Cloudy, with a steady temperature around 40. West wind 11 to 17 mph. Chance of precipitation is 60%.
Thursday
Rain likely before 3pm, then rain likely, possibly mixed with snow between 3pm and 4pm, then snow likely after 4pm. Cloudy, with a temperature rising to near 42 by 11am, then falling to around 27 during the remainder of the day. Breezy, with a west wind 16 to 24 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday Night
A 40 percent chance of snow. Cloudy, with a low around 2. Wind chill values between -10 and zero. North wind 14 to 20 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.
Friday
Snow likely, mainly after 11am. Cloudy, with a high near 9. Northeast wind 7 to 10 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Friday Night
Snow. The snow could be heavy at times. Low around -2. East northeast wind 7 to 10 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 30 percent chance of snow before 11am. Mostly cloudy, with a high near 9. North northeast wind 7 to 10 mph becoming east southeast in the afternoon. Little or no snow accumulation expected.
Saturday Night
Mostly cloudy, with a low around 0. Southeast wind 7 to 10 mph.
Sunday
Partly sunny, with a high near 38. Southwest wind 11 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 22. West southwest wind around 11 mph.
Monday
Mostly sunny, with a high near 37. Southwest wind around 10 mph.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Partly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NW Rock Springs MT
 46.9°N 106.4°W (Elev. 2864 ft)
2:34 am MST Dec 10, 2025
8am 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