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.

rain,mist

45°F

7°C

Humidity	100%
Wind Speed	W 8 MPH
Barometer	29.83 in (1010.16 mb)
Dewpoint	45°F (7°C)
Visibility	0.75 mi
Wind Chill	41°F (5°C)
Last update	08 Dec 03:56 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 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: 41 °F
Heavy Rain
and Breezy
Tonight
Low: 30 °F
Rain/Snow and
Breezy
Tuesday
High: 38 °F
Snow Likely
then
Rain/Snow
Tuesday Night
Low: 32 °F
Rain/Snow
then Heavy
Rain
Wednesday
High: 41 °F
Rain/Snow and
Breezy
Wednesday Night
Low: 35 °F
Rain/Snow
Thursday
High: 39 °F
Rain/Snow
Thursday Night
Low: 37 °F
Rain/Snow
Likely

Detailed Forecast

This Afternoon

Rain. The rain could be heavy at times. High near 41. Breezy, with a west wind around 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an 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 30. Breezy, with a northwest wind 24 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Tuesday

Snow before 4pm, then snow, possibly mixed with rain. The rain and snow could be heavy at times. High near 38. West wind 6 to 13 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

Tuesday Night

Rain, possibly mixed with snow, becoming all rain after 10pm. The rain and snow could be heavy at times. Low around 32. South wind 9 to 14 mph becoming west 16 to 21 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

Wednesday

Rain and snow. The rain could be heavy at times. High near 41. Breezy, with a west wind 14 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

Wednesday Night

Rain and snow. The rain could be heavy at times. Low around 35. Chance of precipitation is 100%. Little or no snow accumulation expected.

Thursday

Rain and snow before 10am, then snow between 10am and 1pm, then rain and snow after 1pm. High near 39. Chance of precipitation is 90%. Little or no snow accumulation expected.

Thursday Night

Rain likely, possibly mixed with snow, mainly before 10pm. Mostly cloudy, with a low around 37. Chance of precipitation is 70%.

Friday

A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.

Friday Night

A chance of rain. Mostly cloudy, with a low around 35.

Saturday

Rain likely. Partly sunny, with a high near 39.

Saturday Night

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

Sunday

Snow. Mostly cloudy, with a high near 34.