Rainfall of 2 to 7 inches over the past 3 days has increased soil moisture to high levels across western Washington. Heavy rainfall of 0.75 up to 4 inches is expected over the next 30 hours. This amount of rain will put extra pressure on soil instability, leading to an increased threat of landslides and debris flows, especially from recent burned areas.
Over the last couple days at least one landslide has been reported in King County. More landslides are possible.
Areas most susceptible to landslides debris flows under these conditions are steep coastal bluffs, other steep hillsides or road cuts, and recent burned areas. A diminishing threat of landslides and debris flows will continue for several days after the rain ends.
For more information about current conditions, visit https://www.weather.gov/seattle, select Hydrology, and then scroll down for the links to the landslide information pages.
For more information on landslides, visit the website for the Washington State Department of Natural Resources landslide geologic hazards at: http://bit.ly/2mtA3wn
Rainfall of 2 to 7 inches over the past 3 days has increased soil moisture to high levels across western Washington. Heavy rainfall of 0.75 up to 4 inches is expected over the next 30 hours. This amount of rain will put extra pressure on soil instability, leading to an increased threat of landslides and debris flows, especially from recent burned areas. Over the last couple days at least one landslide has been reported in King County. More landslides are possible. Areas most susceptible to landslides debris flows under these conditions are steep coastal bluffs, other steep hillsides or road cuts, and recent burned areas. A diminishing threat of landslides and debris flows will continue for several days after the rain ends. For more information about current conditions, visit www.weather.gov/seattle, select Hydrology, and then scroll down for the links to the landslide information pages. For more information on landslides, visit the website for the Washington State Department of Natural Resources landslide geologic hazards at: http://bit.ly/2mtA3wn
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WHAT: Flooding caused by excessive rainfall continues to be possible.
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WHERE: Portions of northwest and west central Washington, including the following counties, in northwest Washington, Skagit and Whatcom. In west central Washington, King and Snohomish.
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WHEN: Through Friday afternoon.
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IMPACTS: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
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ADDITIONAL DETAILS:
- An additional 2 to 4 inches of rain are expected over the North and Central Cascades through Friday. Rainfall rates in the mountains will peak into Friday. This will create a double (or even triple) crest scenario on Friday, pushing some rivers back above flood stage. The Snoqualmie and Snohomish Rivers will likely remain above flood stage. The rivers most likely to go back above flood stage Friday are the Skykomish and Tolt Rivers. New rivers likely to exceed flood stage are the Stillaguamish and Skagit Rivers, with the latest forecast showing the Skagit River to rise into Moderate Flood stage and just below Major Flood stage.
- http://www.weather.gov/safety/flood
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest and west central Washington, including the following counties, in northwest Washington, Skagit and Whatcom. In west central Washington, King and Snohomish. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - An additional 2 to 4 inches of rain are expected over the North and Central Cascades through Friday. Rainfall rates in the mountains will peak into Friday. This will create a double (or even triple) crest scenario on Friday, pushing some rivers back above flood stage. The Snoqualmie and Snohomish Rivers will likely remain above flood stage. The rivers most likely to go back above flood stage Friday are the Skykomish and Tolt Rivers. New rivers likely to exceed flood stage are the Stillaguamish and Skagit Rivers, with the latest forecast showing the Skagit River to rise into Moderate Flood stage and just below Major Flood stage. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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