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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

SHENANGO (SGOM8)

Lat: 45.45964°NLon: 111.24447°WElev: 5391.0ft.

NA

40°F

4°C

Humidity 93%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 25 Dec 05:39 AM MST
Extended Forecast for

12 Miles SSW Gallatin Gateway MT

  • Overnight

    Overnight: A chance of rain and snow. Mostly cloudy, with a low around 37. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 37 °F

    Chance
    Rain/Snow

  • Christmas Day

    Christmas Day: A chance of rain and snow before 8am, then a chance of snow between 8am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 42. South southwest wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 42 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 33. South southwest wind around 14 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Chance Snow

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 37. South southwest wind 14 to 18 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 21. South southwest wind 14 to 16 mph, with gusts as high as 34 mph. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Chance Snow

  • Saturday

    Saturday: Snow. High near 25. West northwest wind 10 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 25 °F

    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 6. Northwest wind around 6 mph becoming light and variable in the evening.

    Low: 6 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 21. Southwest wind around 6 mph.

    High: 21 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of rain and snow. Mostly cloudy, with a low around 37. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Christmas Day
A chance of rain and snow before 8am, then a chance of snow between 8am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 42. South southwest wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 33. South southwest wind around 14 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.
Friday
Snow likely. Mostly cloudy, with a high near 37. South southwest wind 14 to 18 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday Night
A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 21. South southwest wind 14 to 16 mph, with gusts as high as 34 mph. New snow accumulation of less than a half inch possible.
Saturday
Snow. High near 25. West northwest wind 10 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Mostly cloudy, with a low around 6. Northwest wind around 6 mph becoming light and variable in the evening.
Sunday
Mostly sunny, with a high near 21. Southwest wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 13.
Monday
Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Partly sunny, with a high near 40.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles SSW Gallatin Gateway MT
 45.45°N 111.32°W (Elev. 7234 ft)
Last Update:
5:07 am MST Dec 25, 2025
Forecast Valid:
5am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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