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	1.50 mi
Last update	09 Dec 10:42 PM PST

More Information:

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

Extended Forecast for

5 Miles ENE Snoqualmie Pass WA

Flood Watch December 9, 10:52pm until December 12, 07:00am

Click here for hazard details and duration

Flood Watch

Flood Watch December 9, 10:52pm until December 12, 07:00am
NOW until 7:00am Fri
Flood Watch
Tonight
Low: 35 °F⇑
Heavy Rain
Wednesday
High: 45 °F
Heavy Rain
and Breezy
Wednesday Night
Low: 34 °F
Heavy Rain
and Breezy
Thursday
High: 37 °F
Rain/Snow and
Breezy then
Snow
Thursday Night
Low: 35 °F
Rain/Snow
Friday
High: 39 °F
Rain/Snow
Likely
Friday Night
Low: 35 °F
Chance Rain
Saturday
High: 39 °F
Chance Rain

Detailed Forecast

Tonight

Rain. The rain could be heavy at times. Temperature rising to around 42 by 4am. West wind 11 to 17 mph, with gusts as high as 24 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 45. Breezy, with a west wind 21 to 25 mph, with gusts as high as 39 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 34. Breezy, with a west wind 26 to 29 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

Thursday

Rain and snow, becoming all snow after 10am. High near 37. Breezy, with a west wind 13 to 22 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday Night

Rain and snow. Low around 35. West wind around 9 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Friday

Rain likely, possibly mixed with snow, becoming all rain after 1pm. Mostly cloudy, with a high near 39. 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 35.

Saturday

A 30 percent chance of rain. Mostly cloudy, with a high near 39.

Saturday Night

Rain likely before 1am, then rain, possibly mixed with snow. Low around 32. Chance of precipitation is 80%.

Sunday

Rain and snow. Mostly cloudy, with a high near 34.

Sunday Night

Rain and snow likely. Mostly cloudy, with a low around 32.

Monday

Rain, possibly mixed with snow. Mostly cloudy, with a high near 37.