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

Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Lewiston, Lewiston-Nez Perce County Airport (KLWS)

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

Overcast

55°F

13°C

Humidity 66%
Wind Speed SSW 14 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 08 Dec 08:35 PM PST
Extended Forecast for

Lewiston ID

Wind Advisory until December 9, 07:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until December 9, 07:00am

    NOW until 7:00am Tue

    Wind Advisory

  • Tonight

    Low: 50 °F

    Breezy.
    Chance Rain
    then Rain

  • Tuesday

    Tuesday: Rain, mainly before 10am. High near 55. West wind 12 to 17 mph becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Temperature falling to near 46 by 8pm, then rising to around 53 during the remainder of the night. East wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F⇑

    Rain

  • Wednesday

    Wednesday: Rain. High near 60. Southwest wind around 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely. Cloudy, with a low around 53. Southwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 10am. Cloudy, with a high near 59. Chance of precipitation is 70%.

    High: 59 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain, mainly after 4am. Low around 50. Breezy, with a southwest wind 17 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain, mainly before 10am. High near 55. West wind 12 to 17 mph becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Temperature falling to near 46 by 8pm, then rising to around 53 during the remainder of the night. East wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. High near 60. Southwest wind around 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain likely. Cloudy, with a low around 53. Southwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain likely, mainly before 10am. Cloudy, with a high near 59. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 48.
Friday
Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 44.
Saturday
Partly sunny, with a high near 56.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 43.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 53.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 41.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewiston ID
 46.39°N 116.97°W (Elev. 1407 ft)
Last Update:
8:22 pm PST Dec 8, 2025
Forecast Valid:
8pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
Forecast Discussion
 
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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