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 >

Current conditions at

NCSB (NCSW1)

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

NA

36°F

2°C

Humidity 99%
Wind Speed NNW 8 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill30°F (-1°C)
Last update 09 Dec 02:06 AM PST
Extended Forecast for

Winthrop WA

  • Overnight

    Overnight: A 40 percent chance of rain.  Mostly cloudy, with a low around 31. West wind around 9 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Chance Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 4pm.  Increasing clouds, with a high near 43. West wind 5 to 9 mph becoming calm  in the afternoon.  New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow, becoming all rain after 3am.  Low around 30. Calm wind.  Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain.  High near 44. Northwest wind 3 to 6 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain.  Low around 34. West wind around 6 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Rain

  • Thursday

    Thursday: Rain likely, mainly before 10am.  Mostly cloudy, with a high near 44. Chance of precipitation is 70%.

    High: 44 °F

    Rain Likely
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain, mainly before 10pm.  Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly after 10am.  Mostly cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 10pm.  Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Overnight
A 40 percent chance of rain. Mostly cloudy, with a low around 31. West wind around 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 30 percent chance of rain, mainly after 4pm. Increasing clouds, with a high near 43. West wind 5 to 9 mph becoming calm in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain, possibly mixed with snow, becoming all rain after 3am. Low around 30. Calm wind. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday
Rain. High near 44. Northwest wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain. Low around 34. West wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 44. Chance of precipitation is 70%.
Thursday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 31.
Friday
A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 44.
Friday Night
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 32.
Saturday
A slight chance of rain and snow after 10am. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Sunday
A 50 percent chance of rain. Partly sunny, with a high near 41.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 30.
Monday
Rain. High near 42. Chance of precipitation is 80%.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop WA
 48.48°N 120.19°W (Elev. 1801 ft)
1:26 am PST Dec 9, 2025
2am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
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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