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

Flood Watch in effect from December 8, 10:00 AM PST until December 12, 04:00 AM PST

Current conditions at

CANYON CREEK (CYFW1)

Lat: 45.92944°NLon: 122.20278°WElev: 2592.0ft.

48°F

9°C

Humidity	100%
Wind Speed	SSE 11 MPH
Barometer	NA
Dewpoint	48°F (9°C)
Visibility	NA
Wind Chill	43°F (6°C)
Last update	08 Dec 01:52 PM PST

More Information:

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

Extended Forecast for

Mount St Helens WA

Flood Watch until December 12, 04:00am

Click here for hazard details and duration

Flood Watch

Flood Watch until December 12, 04:00am
NOW until 4:00am Fri
Flood Watch
This Afternoon
High: 37 °F
Heavy Rain
and Very
Windy
Tonight
Low: 29 °F
Very Windy.
Heavy Rain
then
Rain/Snow
Tuesday
High: 38 °F
Snow then
Rain/Snow
Tuesday Night
Low: 34 °F
Heavy Rain
and Very
Windy
Wednesday
High: 40 °F
Rain/Snow and
Very Windy
Wednesday Night
Low: 36 °F
Rain/Snow and
Windy
Thursday
High: 39 °F
Rain/Snow and
Breezy
Thursday Night
Low: 37 °F
Rain/Snow
Likely

Detailed Forecast

This Afternoon

Rain. The rain could be heavy at times. Snow level 8300 feet. High near 37. Very windy, with a southwest wind around 32 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Tonight

Snow, possibly mixed with rain, becoming all snow after 3am. The rain and snow could be heavy at times. Snow level 8000 feet lowering to 6600 feet after midnight . Low around 29. Very windy, with a southwest wind 28 to 38 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Tuesday

Snow before 1pm, then rain and snow. High near 38. North wind 9 to 11 mph becoming south southwest in the morning. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Tuesday Night

Rain. The rain could be heavy at times. Low around 34. Very windy, with a southwest wind 20 to 25 mph increasing to 26 to 31 mph after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.

Wednesday

Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 8500 feet lowering to 7800 feet in the afternoon . High near 40. Very windy, with a southwest wind 24 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

Wednesday Night

Rain, possibly mixed with snow before 10pm, then rain between 10pm and 1am, then rain, possibly mixed with snow after 1am. Snow level 8000 feet. Low around 36. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Thursday

Snow, possibly mixed with rain, mainly after 7am. Snow level 6900 feet rising to 7600 feet in the afternoon. High near 39. Breezy. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday Night

Snow likely, possibly mixed with rain, mainly before 10pm. Snow level 7100 feet. Mostly cloudy, with a low around 37.

Friday

A chance of rain and snow. Snow level 6900 feet. Mostly cloudy, with a high near 39.

Friday Night

A slight chance of rain and snow before 1am, then a slight chance of snow. Snow level 6600 feet. Mostly cloudy, with a low around 33.

Saturday

A chance of snow. Partly sunny, with a high near 36.

Saturday Night

Snow likely. Mostly cloudy, with a low around 31. Breezy.

Sunday

Snow. Mostly cloudy, with a high near 33. Breezy.