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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

Stampede Pass (KSMP)

Lat: 47.27648°NLon: 121.33817°WElev: 3970.0ft.

light rain,mist

37°F

3°C

Humidity 100%
Wind Speed W 5 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 37°F (3°C)
Visibility 1.00 mi
Wind Chill33°F (1°C)
Last update 07 Dec 10:23 PM PST
Extended Forecast for

Snoqualmie Pass WA

  • Tonight

    Tonight: Rain, possibly mixed with snow, becoming all rain after 1am. Low around 37. Light west wind. Winds could gust as high as 20 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow

  • Monday

    Monday: Rain, mainly after 7am. The rain could be heavy at times. High near 46. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    High: 46 °F

    Heavy Rain

  • Monday Night

    Monday Night: Rain before 1am, then rain and snow. The rain could be heavy at times. Low around 34. West wind 8 to 11 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 34 °F

    Heavy Rain
    then
    Rain/Snow

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, becoming all rain after 1pm. High near 40. Light west wind. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. The rain could be heavy at times. Low around 35. Light and variable wind. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    Low: 35 °F

    Heavy Rain

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 44. Chance of precipitation is 100%.

    High: 44 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Rain. The rain could be heavy at times. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Heavy Rain

  • Thursday

    Thursday: Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.

    High: 42 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.

    Low: 39 °F

    Rain Likely

Detailed Forecast

Tonight
Rain, possibly mixed with snow, becoming all rain after 1am. Low around 37. Light west wind. Winds could gust as high as 20 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Monday
Rain, mainly after 7am. The rain could be heavy at times. High near 46. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Monday Night
Rain before 1am, then rain and snow. The rain could be heavy at times. Low around 34. West wind 8 to 11 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
Rain, possibly mixed with snow, becoming all rain after 1pm. High near 40. Light west wind. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday Night
Rain. The rain could be heavy at times. Low around 35. Light and variable wind. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Wednesday
Rain. The rain could be heavy at times. High near 44. Chance of precipitation is 100%.
Wednesday Night
Rain. The rain could be heavy at times. Low around 37. Chance of precipitation is 80%.
Thursday
Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Friday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 46.
Friday Night
A chance of rain. Mostly cloudy, with a low around 38.
Saturday
Rain likely. Partly sunny, with a high near 45.
Saturday Night
Rain likely. Mostly cloudy, with a low around 37.
Sunday
Rain likely. Mostly cloudy, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Snoqualmie Pass WA
 47.41°N 121.41°W (Elev. 2812 ft)
Last Update:
9:15 pm PST Dec 7, 2025
Forecast Valid:
10pm PST Dec 7, 2025-6pm PST Dec 14, 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