Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Current conditions at

Ririe (ITD18)

Lat: 43.6111°NLon: 111.70531°WElev: 5106.0ft.

NA

19°F

-7°C

Humidity 72%
Wind Speed SE 18 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility 1.24 mi
Wind Chill4°F (-16°C)
Last update 30 Dec 11:00 AM MST
Extended Forecast for

Swan Valley ID

  • Today

    Today: Sunny, with a high near 33. Light east wind.

    High: 33 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 13. Calm wind becoming east around 6 mph in the evening.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41. East wind 5 to 7 mph becoming calm  in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after 5am.  Mostly cloudy, with a low around 29. East southeast wind 3 to 6 mph.  Little or no snow accumulation expected.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • New Year's Day

    New Year's Day: Rain likely, possibly mixed with snow, becoming all rain after 2pm.  Snow level rising to 6900 feet in the afternoon. Mostly cloudy, with a high near 40. South southeast wind 3 to 7 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Rain.  Snow level 7100 feet. Low around 33. Chance of precipitation is 80%.

    Low: 33 °F

    Rain

  • Friday

    Friday: Rain likely.  Snow level 7300 feet. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.

    High: 42 °F

    Rain Likely

  • Friday Night

    Friday Night: A 40 percent chance of rain.  Snow level 7400 feet. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain before 11am, then rain and snow likely.  Snow level 7200 feet lowering to 6500 feet in the afternoon . Mostly cloudy, with a high near 43. Chance of precipitation is 60%.

    High: 43 °F

    Rain/Snow
    Likely

Detailed Forecast

Today
Sunny, with a high near 33. Light east wind.
Tonight
Mostly clear, with a low around 13. Calm wind becoming east around 6 mph in the evening.
Wednesday
Mostly sunny, with a high near 41. East wind 5 to 7 mph becoming calm in the afternoon.
Wednesday Night
A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 29. East southeast wind 3 to 6 mph. Little or no snow accumulation expected.
New Year's Day
Rain likely, possibly mixed with snow, becoming all rain after 2pm. Snow level rising to 6900 feet in the afternoon. Mostly cloudy, with a high near 40. South southeast wind 3 to 7 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
Rain. Snow level 7100 feet. Low around 33. Chance of precipitation is 80%.
Friday
Rain likely. Snow level 7300 feet. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of rain. Snow level 7400 feet. Mostly cloudy, with a low around 35.
Saturday
A chance of rain before 11am, then rain and snow likely. Snow level 7200 feet lowering to 6500 feet in the afternoon . Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Saturday Night
Rain and snow likely, mainly before 11pm. Snow level 6300 feet lowering to 5500 feet after midnight . Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Sunday
A 50 percent chance of snow. Mostly cloudy, with a high near 40.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 25.
Monday
A 30 percent chance of snow. Mostly cloudy, with a high near 39.
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ABOUT THIS FORECAST

 
Point Forecast:
Swan Valley ID
 43.46°N 111.34°W (Elev. 5509 ft)
10:31 am MST Dec 30, 2025
11am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database