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.

heavy rain,fog

39°F

4°C

Humidity	100%
Wind Speed	N 3 MPH
Barometer	29.9 in (1012.53 mb)
Dewpoint	39°F (4°C)
Visibility	0.25 mi
Last update	08 Dec 12:31 PM PST

More Information:

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

Extended Forecast for

14 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
This Afternoon
High: 37 °F
Rain/Snow
Tonight
Low: 26 °F
Rain/Snow and
Breezy
Tuesday
High: 34 °F
Heavy Snow
Tuesday Night
Low: 30 °F
Rain/Snow
Wednesday
High: 37 °F
Rain/Snow
Wednesday Night
Low: 33 °F
Rain/Snow
Thursday
High: 37 °F
Rain/Snow
Thursday Night
Low: 35 °F
Rain/Snow
Likely

Detailed Forecast

This Afternoon

Rain, possibly mixed with snow, becoming all rain after 1pm. The rain could be heavy at times. High near 37. West wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around an inch possible.

Tonight

Rain before 10pm, then rain and snow between 10pm and 1am, then snow after 1am. The rain and snow could be heavy at times. Low around 26. Breezy, with a west wind 23 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

Tuesday

Snow. The snow could be heavy at times. High near 34. West wind 12 to 17 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Tuesday Night

Snow before 10pm, then rain, possibly mixed with snow. The rain and snow could be heavy at times. Low around 30. West wind 10 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Wednesday

Rain and snow. The rain could be heavy at times. High near 37. West wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Wednesday Night

Rain and snow. Low around 33. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Thursday

Rain, possibly mixed with snow. High near 37. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Thursday Night

Rain likely, possibly mixed with snow, becoming all rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 70%.

Friday

A 40 percent chance of rain. Mostly cloudy, with a high near 37.

Friday Night

A chance of rain. Mostly cloudy, with a low around 33.

Saturday

Rain and snow likely. Partly sunny, with a high near 38.