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.

light snow,fog

32°F

0°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	30.05 in (1017.61 mb)
Dewpoint	32°F (0°C)
Visibility	0.50 mi
Last update	09 Dec 04:56 PM PST

More Information:

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

Extended Forecast for

4 Miles S Snoqualmie Pass WA

Flood Watch December 9, 05:56pm until December 12, 07:00am

Click here for hazard details and duration

Flood Watch

Flood Watch December 9, 05:56pm until December 12, 07:00am
NOW until 7:00am Fri
Flood Watch
This Afternoon
High: 38 °F
Rain/Snow
Tonight
Low: 36 °F⇑
Rain/Snow
then Heavy
Rain
Wednesday
High: 47 °F
Heavy Rain
Wednesday Night
Low: 39 °F
Heavy Rain
Thursday
High: 42 °F
Rain/Snow
Thursday Night
Low: 38 °F
Rain
Friday
High: 43 °F
Rain/Snow
Likely
Friday Night
Low: 38 °F
Chance Rain

Detailed Forecast

This Afternoon

Rain, possibly mixed with snow. The rain could be heavy at times. High near 38. Light southeast wind. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.

Tonight

Rain, possibly mixed with snow, becoming all rain after 7pm. The rain could be heavy at times. Temperature rising to around 45 by 4am. Southeast wind 5 to 7 mph becoming southwest after midnight. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Wednesday

Rain. The rain could be heavy at times. High near 47. West wind 10 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.

Wednesday Night

Rain. The rain could be heavy at times. Low around 39. West wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

Thursday

Rain before 10am, then rain, possibly mixed with snow. High near 42. West wind around 8 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

Thursday Night

Rain. Low around 38. Chance of precipitation is 80%.

Friday

Rain likely, possibly mixed with snow, becoming all rain after 1pm. Mostly cloudy, with a high near 43. Chance of precipitation is 70%. Little or no snow accumulation expected.

Friday Night

A 50 percent chance of rain. Mostly cloudy, with a low around 38.

Saturday

A 30 percent chance of rain. Partly sunny, with a high near 44.

Saturday Night

Rain, mainly after 10pm. Mostly cloudy, with a low around 36.

Sunday

Rain. Mostly cloudy, with a high near 40.

Sunday Night

Rain likely. Mostly cloudy, with a low around 35.

Monday

Rain. Mostly cloudy, with a high near 41.