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

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 >

Hazardous Weather Conditions

Current conditions at

Lewiston, Lewiston-Nez Perce County Airport (KLWS)

Lat: 46.37472°NLon: 117.01444°WElev: 1437.0ft.

Clear

41°F

5°C

Humidity 54%
Wind Speed N 0 MPH
Barometer 30.4 in (1029.46 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 30 Dec 12:56 PM PST
Extended Forecast for

Lewiston ID

Air Stagnation Advisory until January 1, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory until January 1, 12:00pm

    NOW until 12:00pm Thu

    Air Stagnation Advisory

  • This Afternoon

    High: 42 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 28. East wind 3 to 6 mph.

    Low: 28 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 42. Southeast wind around 5 mph becoming calm in the morning.

    High: 42 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 42. Light east wind.

    High: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 30 percent chance of rain, mainly after 10pm. Cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Friday

    Friday: A 40 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 42. Southeast wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 28. East wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 42. Southeast wind around 5 mph becoming calm in the morning.
Wednesday Night
Mostly cloudy, with a low around 30. Calm wind.
New Year's Day
A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 42. Light east wind.
Thursday Night
A 30 percent chance of rain, mainly after 10pm. Cloudy, with a low around 36.
Friday
A 40 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 50.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 40.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 51.
Saturday Night
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 36.
Sunday
A 20 percent chance of rain. Partly sunny, with a high near 48.
Sunday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 35.
Monday
A 20 percent chance of rain. Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewiston ID
 46.37°N 116.99°W (Elev. 1204 ft)
Last Update:
3:31 am PST Dec 30, 2025
Forecast Valid:
1pm PST Dec 30, 2025-6pm PST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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