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

Flood Watch until December 12, 04:00 AM PST

Current conditions at

CANYON CREEK (CYFW1)

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

42°F

6°C

Humidity	100%
Wind Speed	NNW 1 MPH
Barometer	NA
Dewpoint	42°F (6°C)
Visibility	NA
Last update	09 Dec 02:52 AM PST

More Information:

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

Extended Forecast for

3 Miles ENE Mount St Helens WA

Flood Watch December 9, 03:47am until December 12, 04:00am

Click here for hazard details and duration

Flood Watch

Flood Watch December 9, 03:47am until December 12, 04:00am
NOW until 4:00am Fri
Flood Watch
Overnight
Low: 38 °F
Rain/Snow
Tuesday
High: 44 °F
Rain/Snow
Likely then
Rain/Snow
Tuesday Night
Low: 40 °F⇑
Heavy Rain
and Breezy
Wednesday
High: 45 °F
Heavy Rain
and Breezy
Wednesday Night
Low: 43 °F
Rain and
Breezy
Thursday
High: 45 °F
Rain
Thursday Night
Low: 43 °F
Rain Likely
then Chance
Rain
Friday
High: 45 °F
Chance Rain

Detailed Forecast

Overnight

Rain before 5am, then rain and snow. The rain could be heavy at times. Snow level 5700 feet. Steady temperature around 38. West northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.

Tuesday

Rain likely, possibly mixed with snow before 1pm, then rain. Snow level 4000 feet rising to 8600 feet in the afternoon. High near 44. Northwest wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

Tuesday Night

Rain. The rain could be heavy at times. Temperature rising to around 45 by midnight. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

Wednesday

Rain. The rain could be heavy at times. High near 45. Breezy, with a southwest wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Wednesday Night

Rain. Low around 43. Breezy, with a west southwest wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Thursday

Rain. High near 45. Chance of precipitation is 100%.

Thursday Night

Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

Friday

A chance of rain. Mostly cloudy, with a high near 45.

Friday Night

A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 38.

Saturday

A chance of rain, mainly after 10am. Partly sunny, with a high near 45.

Saturday Night

Rain. Snow level 5800 feet. Mostly cloudy, with a low around 39.