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Flood Watch

Flood Watch
National Weather Service Seattle WA
339 PM PDT Fri Oct 20 2017

Clallam-Grays Harbor-Jefferson-King-Kitsap-Lewis-Mason-Skagit-
339 PM PDT Fri Oct 20 2017


The Flood Watch is now in effect for

* Portions of northwest Washington and west central Washington,
  including the following counties, in northwest Washington,
  Clallam, Grays Harbor, Jefferson, Kitsap, Mason, Skagit, and
  Whatcom. In west central Washington, King, Lewis, Snohomish,
  and Thurston.

* From Saturday afternoon through late Sunday night

* Heavy rain is forecast to fall Saturday afternoon through
  Sunday afternoon. The period of heaviest rain will be Saturday
  night with the focus of rainfall in the Cascades from about
  Stevens Pass southward. less rain is forecast for the North
  Cascades and Olympics. There is still a chance the heavy rain
  could spread to the northern Cascades and Olympics. The flood
  watch remains in effect for all counties in Western Washington
  with the exception of Island and San Juan counties.

* Minor flooding is forecast on most rivers flowing out of the
  Cascades from the Skykomish River southward, with a few rivers
  cresting in the moderate flood category. Other rivers in the
  area could also flood. In addition, urban and small stream
  flooding is possible beginning Saturday night.

* The headwaters of Greenwater River is in the Norse Peak Fire
  burn scar and could see greater than normal flows with heavy

* Soil moisture is still relatively dry below the surface since
  there has not been enough rainfall accumulation over a long
  enough period yet this wet season. While an isolated landslide
  is possible in western Washington with any rainstorm, and
  especially with high intensity rain, soil moisture conditions
  have not yet significantly increased the landslide threat. This
  storm will bring conditions close to that threshold.


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.



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