Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

WY28 - South Pass (KSOU)

Lat: 42.47752°NLon: 108.8444°WElev: 8196.0ft.

NA

25°F

-4°C

Humidity 91%
Wind Speed WSW 19 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility 1.24 mi
Wind Chill11°F (-12°C)
Last update 09 Dec 03:42 AM MST
Extended Forecast for

16 Miles NW South Pass City WY

Winter Weather Advisory December 9, 05:00am until December 10, 05:00pm
Click here for hazard details and duration
Winter Weather Advisory
  • Overnight

    Overnight: A 20 percent chance of snow after 4am.  Widespread blowing snow, mainly after 5am. Mostly cloudy, with a steady temperature around 23. Very windy, with a west wind around 40 mph, with gusts as high as 65 mph.

    Low: 23 °F

    Slight Chance
    Snow and
    Blowing Snow

  • Tuesday

    Tuesday: A 40 percent chance of snow, mainly before 4pm.  Widespread blowing snow, mainly before 1pm. Partly sunny, with a high near 28. Very windy, with a west wind 38 to 47 mph, with gusts as high as 75 mph.  New snow accumulation of less than a half inch possible.

    High: 28 °F

    Chance Snow
    and Blowing
    Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow, mainly after 2am.  Mostly cloudy, with a low around 20. Windy, with a west wind 21 to 31 mph, with gusts as high as 50 mph.  New snow accumulation of less than one inch possible.

    Low: 20 °F

    Chance Snow
    and Windy

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly before 9am.  Partly sunny, with a high near 31. Very windy, with a west wind 37 to 41 mph, with gusts as high as 65 mph.

    High: 31 °F

    Chance Snow
    and Very
    Windy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23. Very windy, with a west wind 34 to 37 mph, with gusts as high as 55 mph.

    Low: 23 °F

    Mostly Cloudy
    and Very
    Windy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. Very windy, with a west wind 32 to 36 mph, with gusts as high as 55 mph.

    High: 29 °F

    Mostly Sunny
    and Very
    Windy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 20. Windy, with a west wind 23 to 30 mph, with gusts as high as 47 mph.

    Low: 20 °F

    Mostly Cloudy
    and Windy

  • Friday

    Friday: Partly sunny, with a high near 27. Windy.

    High: 27 °F

    Partly Sunny
    and Windy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19. Breezy.

    Low: 19 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
A 20 percent chance of snow after 4am. Widespread blowing snow, mainly after 5am. Mostly cloudy, with a steady temperature around 23. Very windy, with a west wind around 40 mph, with gusts as high as 65 mph.
Tuesday
A 40 percent chance of snow, mainly before 4pm. Widespread blowing snow, mainly before 1pm. Partly sunny, with a high near 28. Very windy, with a west wind 38 to 47 mph, with gusts as high as 75 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
A 40 percent chance of snow, mainly after 2am. Mostly cloudy, with a low around 20. Windy, with a west wind 21 to 31 mph, with gusts as high as 50 mph. New snow accumulation of less than one inch possible.
Wednesday
A 30 percent chance of snow, mainly before 9am. Partly sunny, with a high near 31. Very windy, with a west wind 37 to 41 mph, with gusts as high as 65 mph.
Wednesday Night
Mostly cloudy, with a low around 23. Very windy, with a west wind 34 to 37 mph, with gusts as high as 55 mph.
Thursday
Mostly sunny, with a high near 29. Very windy, with a west wind 32 to 36 mph, with gusts as high as 55 mph.
Thursday Night
Mostly cloudy, with a low around 20. Windy, with a west wind 23 to 30 mph, with gusts as high as 47 mph.
Friday
Partly sunny, with a high near 27. Windy.
Friday Night
Mostly cloudy, with a low around 19. Breezy.
Saturday
Mostly sunny, with a high near 27. Breezy.
Saturday Night
Mostly cloudy, with a low around 19. Breezy.
Sunday
Mostly sunny, with a high near 28. Breezy.
Sunday Night
Partly cloudy, with a low around 18. Breezy.
Monday
Mostly sunny, with a high near 26. Blustery.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles NW South Pass City WY
 42.65°N 109.01°W (Elev. 10840 ft)
2:31 am MST Dec 9, 2025
3am MST Dec 9, 2025-6pm MST Dec 15, 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