Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

32°F

0°C

Humidity 64%
Wind Speed E 12 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Wind Chill23°F (-5°C)
Last update 18 Jan 06:30 PM MST
Extended Forecast for

12 Miles W Marysville MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 13. Wind chill values as low as -1. East southeast wind 9 to 14 mph becoming west northwest after midnight.

    Low: 13 °F

    Decreasing
    Clouds

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 21. Wind chill values as low as -1. West wind 15 to 18 mph, with gusts as high as 24 mph.

    High: 21 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 18. Breezy, with a west wind 22 to 25 mph, with gusts as high as 28 mph.

    Low: 18 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: A 40 percent chance of snow.  Cloudy through mid morning, then gradual clearing, with a high near 20. West northwest wind 14 to 20 mph.  New snow accumulation of less than a half inch possible.

    High: 20 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 11. West wind 16 to 18 mph, with gusts as high as 21 mph.

    Low: 11 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow before 11am.  Partly sunny, with a high near 18.

    High: 18 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 22.

    High: 22 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of snow, mainly after 11pm.  Mostly cloudy, with a low around 9.

    Low: 9 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 13. Wind chill values as low as -1. East southeast wind 9 to 14 mph becoming west northwest after midnight.
M.L.King Day
Mostly sunny, with a high near 21. Wind chill values as low as -1. West wind 15 to 18 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 18. Breezy, with a west wind 22 to 25 mph, with gusts as high as 28 mph.
Tuesday
A 40 percent chance of snow. Cloudy through mid morning, then gradual clearing, with a high near 20. West northwest wind 14 to 20 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
Partly cloudy, with a low around 11. West wind 16 to 18 mph, with gusts as high as 21 mph.
Wednesday
A 20 percent chance of snow before 11am. Partly sunny, with a high near 18.
Wednesday Night
Mostly cloudy, with a low around 14.
Thursday
Mostly cloudy, with a high near 22.
Thursday Night
A chance of snow, mainly after 11pm. Mostly cloudy, with a low around 9.
Friday
A chance of snow. Mostly cloudy, with a high near 12.
Friday Night
A chance of snow. Mostly cloudy, with a low around 1.
Saturday
A chance of snow. Mostly cloudy and cold, with a high near 10.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 4.
Sunday
A chance of snow. Mostly cloudy, with a high near 18.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
2:07 pm MST Jan 18, 2026
6pm MST Jan 18, 2026-6pm MST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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