Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Flood Watch until December 12, 07:00 AM PST

Current conditions at

Stampede Pass (KSMP)

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

unknown precip,mist

32°F

0°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	29.94 in (1013.89 mb)
Dewpoint	32°F (0°C)
Visibility	0.75 mi
Last update	09 Dec 09:23 PM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

8 Miles NE Snoqualmie Pass WA

Flood Watch December 9, 09:53pm until December 12, 07:00am

Click here for hazard details and duration

Flood Watch

Flood Watch December 9, 09:53pm until December 12, 07:00am
NOW until 7:00am Fri
Flood Watch
Tonight
Low: 32 °F⇑
Rain/Snow
then Heavy
Rain
Wednesday
High: 39 °F
Heavy Rain
and Breezy
Wednesday Night
Low: 31 °F
Breezy. Heavy
Rain then
Rain/Snow
Thursday
High: 34 °F
Rain/Snow
then Snow
Thursday Night
Low: 31 °F
Snow
Friday
High: 36 °F
Snow Likely
then
Rain/Snow
Likely
Friday Night
Low: 32 °F
Chance
Rain/Snow
Saturday
High: 35 °F
Chance
Rain/Snow

Detailed Forecast

Tonight

Rain, possibly mixed with snow, becoming all rain after 10pm. The rain could be heavy at times. Temperature rising to around 39 by 5am. West wind 9 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.

Wednesday

Rain. The rain could be heavy at times. High near 39. Breezy, with a west wind 22 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New precipitation amounts in excess of 4 inches possible.

Wednesday Night

Rain before 4am, then rain, possibly mixed with snow. The rain could be heavy at times. Low around 31. Breezy, with a west wind around 26 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

Thursday

Rain, possibly mixed with snow, becoming all snow after 7am. High near 34. West wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Thursday Night

Snow. Low around 31. West wind around 10 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Friday

Snow likely before 1pm, then rain likely. Mostly cloudy, with a high near 36. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Friday Night

A chance of rain before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Saturday

A chance of rain and snow. Mostly cloudy, with a high near 35. Chance of precipitation is 40%.

Saturday Night

Snow, possibly mixed with rain, mainly after 10pm. The snow could be heavy at times. Low around 30. Chance of precipitation is 80%.

Sunday

Snow. The snow could be heavy at times. Mostly cloudy, with a high near 31.

Sunday Night

Snow. Mostly cloudy, with a low around 29.

Monday

Rain and snow. Mostly cloudy, with a high near 32.

Monday Night

Rain and snow. The snow could be heavy at times. Mostly cloudy, with a low around 29.