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

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

NA

35°F

2°C

Humidity 97%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 08 Dec 01:06 PM PST
Extended Forecast for

11 Miles WSW Twisp WA

  • This Afternoon

    This Afternoon: Rain, possibly mixed with snow, becoming all rain after 4pm. High near 37. Southwest wind around 8 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Rain/Snow

  • Tonight

    Tonight: Rain and snow, becoming all snow after midnight. The rain and snow could be heavy at times. Low around 29. West wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 29 °F

    Rain/Snow
    then Heavy
    Snow

  • Tuesday

    Tuesday: Snow likely, mainly after 4pm. The snow could be heavy at times. Partly sunny, with a high near 33. West wind 6 to 11 mph becoming light and variable in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 33 °F

    Partly Sunny
    then Heavy
    Snow

  • Tuesday Night

    Tuesday Night: Snow before 1am, then rain, possibly mixed with snow. The snow could be heavy at times. Low around 28. West wind 3 to 6 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    Low: 28 °F

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Rain and snow. High near 38. West wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 38 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow, becoming all snow after 1am. Low around 33. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 33 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 35. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 35 °F

    Snow Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Snow

  • Friday

    Friday: A slight chance of snow before 10am, then a chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 30%.

    High: 37 °F

    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
Rain, possibly mixed with snow, becoming all rain after 4pm. High near 37. Southwest wind around 8 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Rain and snow, becoming all snow after midnight. The rain and snow could be heavy at times. Low around 29. West wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Snow likely, mainly after 4pm. The snow could be heavy at times. Partly sunny, with a high near 33. West wind 6 to 11 mph becoming light and variable in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Snow before 1am, then rain, possibly mixed with snow. The snow could be heavy at times. Low around 28. West wind 3 to 6 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Wednesday
Rain and snow. High near 38. West wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Wednesday Night
Rain, possibly mixed with snow, becoming all snow after 1am. Low around 33. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow likely. Mostly cloudy, with a high near 35. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Thursday Night
A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 30.
Friday
A slight chance of snow before 10am, then a chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 30%.
Friday Night
A chance of rain and snow, mainly before 10pm. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Saturday
Rain and snow likely. Partly sunny, with a high near 36. Chance of precipitation is 60%.
Saturday Night
Rain and snow likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Sunday
Snow likely. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Twisp WA
 48.29°N 120.33°W (Elev. 5220 ft)
Last Update:
1:17 pm PST Dec 8, 2025
Forecast Valid:
1pm PST Dec 8, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation