ESFSEW A moderately strong atmospheric river will impact Western Washington later today through Saturday night, bringing moderate to heavy rainfall to the region. Rainfall forecasts for the Olympics and Northern and Central Washington Cascades remains between 2 to 4 inches with locally 5+ inches through Saturday night. The Skokomish River is the only river currently forecast to reach flood stage Saturday. Other rivers are forecast to reach action stage Saturday, including the Bogachiel River on the Olympic Peninsula and the Skagit, Snohomish, Skykomish, and Snoqualmie Rivers flowing out of the Cascades. Some uncertainty remains over rainfall amounts. River conditions will continue to be monitored closely the next couple of days. Where heavy rain occurs, the relatively high rain rates could produce flash flooding/debris flows on the more sensitive burn scars. It could also cause ponding or nuisance flooding in urban areas and small streams where drainage is poor or drains are clogged by leaves. Please monitor the latest river forecasts from the National Weather Service for additional information.
ESFSEW A moderately strong atmospheric river will impact Western Washington later today through Saturday night, bringing moderate to heavy rainfall to the region. Rainfall forecasts for the Olympics and Northern and Central Washington Cascades will be increasing, generally between 3 to 5 inches with locally higher amounts possible through Saturday night. This increase in potential rainfall could lead to higher river levels that are not yet reflected in the forecast - which will be updated later today. The Skokomish River is the only river currently forecast to reach flood stage on Saturday. Other rivers are forecast to reach action stage Saturday, including the Bogachiel River on the Olympic Peninsula and the Skagit, Snohomish, Skykomish, and Snoqualmie Rivers flowing out of the Cascades. Some uncertainty still remains over rainfall amounts and how the rivers will respond. River conditions will continue to be monitored closely through the weekend. Where heavy rain occurs, the relatively high rain rates could produce flash flooding/debris flows on the more sensitive burn scars. It could also cause ponding or nuisance flooding in urban areas and small streams where drainage is poor or drains are clogged by leaves. Please monitor the latest river forecasts from the National Weather Service for additional information.
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WHAT: Flooding caused by excessive rainfall is possible.
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WHERE: Portions of northwest and west central Washington, including the following counties, in northwest Washington, Mason, Skagit and Whatcom. In west central Washington, King and Snohomish.
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WHEN: From late tonight through late Saturday night.
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IMPACTS: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Where heavy rain occurs, the relatively high rain rates could produce flash flooding/debris flows on the more sensitive burn scars. It could also cause ponding or nuisance flooding in urban areas and small streams where drainage is poor or drains are clogged by leaves.
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ADDITIONAL DETAILS:
- Rainfall forecasts between 3 to 5 inches with locally higher amounts possible through Saturday night. Snow levels will range from 8000 to 9000 feet. This amount of rainfall will drive some of the rivers in the watch area to near flood stage. The most likely rivers to reach flood stage is the Skokomish, Snohomish, Skykomish, and Snoqualmie, and to a lesser extent, the Skagit, Stillaguamish, and Nooksack rivers.
- http://www.weather.gov/safety/flood
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of northwest and west central Washington, including the following counties, in northwest Washington, Mason, Skagit and Whatcom. In west central Washington, King and Snohomish. * WHEN...From late tonight through late Saturday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Where heavy rain occurs, the relatively high rain rates could produce flash flooding/debris flows on the more sensitive burn scars. It could also cause ponding or nuisance flooding in urban areas and small streams where drainage is poor or drains are clogged by leaves. * ADDITIONAL DETAILS... - Rainfall forecasts between 3 to 5 inches with locally higher amounts possible through Saturday night. Snow levels will range from 8000 to 9000 feet. This amount of rainfall will drive some of the rivers in the watch area to near flood stage. The most likely rivers to reach flood stage is the Skokomish, Snohomish, Skykomish, and Snoqualmie, and to a lesser extent, the Skagit, Stillaguamish, and Nooksack rivers. - 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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