Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. 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.

Rain

48°F

9°C

Humidity	96%
Wind Speed	W 11 MPH
Barometer	29.88 in (1011.85 mb)
Dewpoint	47°F (8°C)
Visibility	7.00 mi
Wind Chill	43°F (6°C)
Last update	10 Dec 06:25 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 10, 06:49pm until December 12, 07:00am

Click here for hazard details and duration

Flood Watch

Flood Watch December 10, 06:49pm until December 12, 07:00am
NOW until 7:00am Fri
Flood Watch
Tonight
Low: 38 °F
Heavy Rain
then
Rain/Snow
Thursday
High: 42 °F
Rain/Snow
Thursday Night
Low: 39 °F⇑
Rain
Friday
High: 44 °F
Rain Likely
Friday Night
Low: 37 °F
Chance Rain
Saturday
High: 49 °F
Slight Chance
Rain
Saturday Night
Low: 39 °F
Chance Rain
then Rain
Sunday
High: 43 °F
Rain

Detailed Forecast

Tonight

Rain before 4am, then rain, possibly mixed with snow. The rain could be heavy at times. Low around 38. West wind 10 to 14 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

Thursday

Rain, possibly mixed with snow. The rain could be heavy at times. High near 42. West wind around 6 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Thursday Night

Rain. Temperature rising to around 42 by 1am. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Rain likely, mainly before 10am. Mostly cloudy, with a high near 44. Calm wind becoming west around 6 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 37. West wind around 6 mph becoming calm in the evening.

Saturday

A 10 percent chance of rain after 4pm. Mostly sunny, with a high near 49.

Saturday Night

Rain, mainly after 4am. Low around 39. Chance of precipitation is 80%.

Sunday

Rain. High near 43. Chance of precipitation is 80%.

Sunday Night

Rain. Low around 39. Chance of precipitation is 80%.

Monday

Rain. Mostly cloudy, with a high near 44.