« View county listFlood Watch
924 PM PST Tue Nov 21 2017
...FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON...
The Flood Watch continues for
* Portions of northwest Washington and west central Washington,
including the following counties, in northwest Washington,
Clallam, Grays Harbor, Jefferson, Skagit, and Whatcom. In west
central Washington, King, Lewis, Pierce, Snohomish, and
* Through Thursday afternoon
* Rainfall totals of 2 to almost 5 inches have fallen over the
Olympic Mountains, with 1 to 4 inches at Mount Rainier and
around 1 to 3 inches further north over the Cascades. The snow
level is around 9000 feet. Rain will continue at times tonight
and Wednesday, though amounts will be less that what occurred
today. A second frontal system will bring another 1 to 4 inches
of rain Wednesday night and Thursday, with the snow level
falling from 7000 feet to 4000 feet as the system moves through.
* The two systems in close succession present a threat of flooding
on rivers in Western Washington. Flooding could begin tonight or
Wednesday. It looks like the threat is for a relatively minor
flooding episode. Some of the rivers to be at risk the earliest
include the Snoqualmie, Nooksack, White, Tolt, and Skykomish
Rivers. Many others are at risk as well. Check out our website
and the Advanced Hydrologic Prediction Service webpage for
A Flood Watch means there is a potential for flooding based on
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.
$$Special Weather Statement
San Juan County-Western Whatcom County-Southwest Interior-
Western Skagit County-Everett and Vicinity-Tacoma Area-
Admiralty Inlet Area-Hood Canal Area-Lower Chehalis Valley Area-
Olympics-Eastern Strait of Juan de Fuca-
Western Strait of Juan De Fuca-North Coast-Central Coast-
East Puget Sound Lowlands-Bellevue and Vicinity-Seattle and Vicinity-
Bremerton and Vicinity-Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
400 PM PST Tue Nov 21 2017
...HEAVY RAINFALL TONIGHT THROUGH THURSDAY MORNING LEAD TO AN
INCREASED THREAT OF LANDSLIDES IN WESTERN WASHINGTON...
Recent rains have increased soil moisture to high levels across
Western Washington, with heavy rainfall expected at times this
evening and again Wednesday night and Thursday morning. At the
coast, rainfall amounts of 1 to 2 inches are likely, with a half to
one and a half inches over the interior lowlands.
This amount of rain will lead to an increased threat of landslides.
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