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

Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

Lat: 46.52361°NLon: 112.80843°WElev: 4327.0ft.

NA

39°F

4°C

Humidity 76%
Wind Speed NW 5 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 15 Apr 05:00 AM MDT
Extended Forecast for

12 Miles W Marysville MT

Winter Weather Advisory April 15, 06:00pm until April 16, 09:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: A 20 percent chance of snow showers. Mostly cloudy, with a low around 27. Breezy, with a west southwest wind around 25 mph, with gusts as high as 29 mph.

    Low: 27 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Wednesday

    Wednesday: Snow showers, mainly after 3pm. Some thunder is also possible. High near 32. Breezy, with a west southwest wind 24 to 28 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 32 °F

    Breezy.
    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers before 4am, then a slight chance of snow showers after 5am. The snow could be heavy at times. Low around 16. Wind chill values as low as -2. Windy, with a west wind 23 to 30 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 16 °F

    Windy. Heavy
    Snow then
    Chance Snow
    Showers

  • Thursday

    Thursday: Snow showers. High near 21. Wind chill values as low as -2. Breezy, with a west wind 22 to 24 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 21 °F

    Snow Showers
    and Breezy

  • Thursday Night

    Thursday Night: A 50 percent chance of snow showers. Mostly cloudy, with a low around 18. Blustery, with a west wind 18 to 25 mph, with gusts as high as 30 mph. New snow accumulation of 1 to 2 inches possible.

    Low: 18 °F

    Chance Snow
    Showers and
    Blustery

  • Friday

    Friday: Snow showers, mainly after noon. High near 24. Blustery. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 24 °F

    Chance Snow
    Showers then
    Snow Showers
    and Blustery

  • Friday Night

    Friday Night: A 20 percent chance of snow showers before midnight. Partly cloudy, with a low around 17. Blustery.

    Low: 17 °F

    Slight Chance
    Snow Showers
    and Blustery
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 35. Breezy.

    High: 35 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow showers. Mostly cloudy, with a low around 27. Breezy, with a west southwest wind around 25 mph, with gusts as high as 29 mph.
Wednesday
Snow showers, mainly after 3pm. Some thunder is also possible. High near 32. Breezy, with a west southwest wind 24 to 28 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow showers before 4am, then a slight chance of snow showers after 5am. The snow could be heavy at times. Low around 16. Wind chill values as low as -2. Windy, with a west wind 23 to 30 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Thursday
Snow showers. High near 21. Wind chill values as low as -2. Breezy, with a west wind 22 to 24 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
A 50 percent chance of snow showers. Mostly cloudy, with a low around 18. Blustery, with a west wind 18 to 25 mph, with gusts as high as 30 mph. New snow accumulation of 1 to 2 inches possible.
Friday
Snow showers, mainly after noon. High near 24. Blustery. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday Night
A 20 percent chance of snow showers before midnight. Partly cloudy, with a low around 17. Blustery.
Saturday
Sunny, with a high near 35. Breezy.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 30.
Monday
A slight chance of rain and snow. Mostly sunny, with a high near 48.
Monday Night
A slight chance of rain and snow. Partly cloudy, with a low around 34.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
Last Update:
2:01 am MDT Apr 15, 2026
Forecast Valid:
5am MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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