Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

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	30.02 in (1016.59 mb)
Dewpoint	32°F (0°C)
Visibility	2.50 mi
Last update	08 Dec 08:56 AM PST

More Information:

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

Extended Forecast for

11 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
Today
High: 41 °F
Rain/Snow
Tonight
Low: 29 °F
Rain/Snow and
Breezy
Tuesday
High: 36 °F
Snow
Tuesday Night
Low: 32 °F
Rain/Snow
Wednesday
High: 40 °F
Rain/Snow
Wednesday Night
Low: 34 °F
Rain/Snow
Thursday
High: 40 °F
Rain/Snow
Thursday Night
Low: 36 °F
Rain/Snow
Likely then
Rain Likely

Detailed Forecast

Today

Rain, possibly mixed with snow, becoming all rain after 1pm. The rain could be heavy at times. High near 41. West wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.

Tonight

Rain before 10pm, then rain, possibly mixed with snow between 10pm and 1am, then snow after 1am. The rain and snow could be heavy at times. Low around 29. Breezy, with a west wind 22 to 24 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Tuesday

Snow. High near 36. West wind 6 to 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Tuesday Night

Rain, possibly mixed with snow, becoming all rain after 1am. The rain could be heavy at times. Low around 32. West wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Wednesday

Rain and snow. The rain could be heavy at times. High near 40. West wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Wednesday Night

Rain, possibly mixed with snow. Low around 34. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday

Rain, possibly mixed with snow. High near 40. Chance of precipitation is 80%. Little or no snow accumulation expected.

Thursday Night

Rain likely, possibly mixed with snow, becoming all rain after 10pm. Mostly cloudy, with a low around 36. Chance of precipitation is 70%.

Friday

A 40 percent chance of rain. Mostly cloudy, with a high near 40.

Friday Night

A chance of rain. Mostly cloudy, with a low around 34.

Saturday

A chance of rain. Partly sunny, with a high near 41.