Flash Flood Watch
Issued by NWS Seattle/Tacoma, WA

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000
WGUS66 KSEW 202222
FFASEW

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Seattle WA
222 PM PST Mon Nov 20 2017

WAC009-027-031-033-041-045-053-057-061-067-073-211030-
/O.NEW.KSEW.FA.A.0006.171122T0000Z-171124T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clallam-Grays Harbor-Jefferson-King-Lewis-Mason-Pierce-Skagit-
Snohomish-Thurston-Whatcom-
222 PM PST Mon Nov 20 2017

...FLOOD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH THURSDAY
AFTERNOON...

The National Weather Service in Seattle has issued a

* Flood Watch for portions of northwest Washington and west
  central Washington, including the following counties, in
  northwest Washington, Clallam, Grays Harbor, Jefferson, Mason,
  Skagit, and Whatcom. In west central Washington, King, Lewis,
  Pierce, Snohomish, and Thurston.

* From Tuesday afternoon through Thursday afternoon

* A couple of storm systems will produce a lot of rain, heavy at
  times, over the Olympic and Cascade mountains Tuesday through
  Wednesday. The first shot of rain Tuesday and Tuesday night will
  produce 3 to 5 inches of rain over the mountains. The second
  shot Wednesday and Wednesday night will produce 2 to 4 and a
  half inches of rain. The snow level will be above 8000 feet
  meaning for all but the highest peaks the precipitation will be
  in the form of rain and not snow. With the double shot of rain
  so close together, the accumulative affect could be enough
  drive multiple rivers to flood.

* At this time, river models show whatever flooding does occur to
  stay in the minor category. Potential rivers at risk are the
  Nooksack, Skagit, Snoqualmie White and Skokomish Rivers as well
  as others.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

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.

&&

$$

www.weather.gov/seattle



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