Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Stampede Pass (KSMP)

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

light snow,freezing fog

30°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	30.0 in (1015.92 mb)
Dewpoint	30°F (-1°C)
Visibility	0.50 mi
Last update	09 Dec 03:01 AM 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 until December 12, 07:00am

Click here for hazard details and duration

Flood Watch

Flood Watch until December 12, 07:00am
NOW until 7:00am Fri
Flood Watch
Overnight
Low: 30 °F
Heavy Snow
Tuesday
High: 35 °F
Snow Likely
then
Rain/Snow
Tuesday Night
Low: 31 °F⇑
Rain/Snow
then Heavy
Rain
Wednesday
High: 43 °F
Heavy Rain
Wednesday Night
Low: 35 °F
Rain/Snow
Thursday
High: 38 °F
Rain/Snow
Thursday Night
Low: 36 °F
Rain/Snow
Likely
Friday
High: 39 °F
Rain Likely

Detailed Forecast

Overnight

Snow. The snow could be heavy at times. Low around 30. Northwest wind around 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of 3 to 5 inches possible.

Tuesday

Snow before 4pm, then snow, possibly mixed with rain. The rain and snow could be heavy at times. High near 35. West wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

Tuesday Night

Rain, possibly mixed with snow, becoming all rain after 10pm. The rain and snow could be heavy at times. Temperature rising to around 42 by 4am. South wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Wednesday

Rain. The rain could be heavy at times. High near 43. West wind 11 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.

Wednesday Night

Rain, possibly mixed with snow. The rain could be heavy at times. Low around 35. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Thursday

Rain, possibly mixed with snow. High near 38. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday Night

Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 36. Chance of precipitation is 70%. Little or no snow accumulation expected.

Friday

Rain likely, mainly before 10am. Mostly cloudy, with a high near 39. Chance of precipitation is 60%.

Friday Night

A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.

Saturday

Rain and snow likely, mainly after 4pm. Partly sunny, with a high near 40.

Saturday Night

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