Southwest Interior Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Areal Flood Watch
Issued: 10:13 AM PST Nov. 21, 2017 – National Weather Service

... Flood Watch remains in effect from 4 PM PST this afternoon
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
Thurston.

* From 4 PM PST this afternoon through Thursday afternoon

* rain has begun ahead of a warm front and the plume of
subtropical moisture with it that will bring 2 to 5.5 inches of
rain to the Olympics and Mount Rainier today and tonight, and 1
to 4 inches of rain to the Cascades north of Mount Rainier. The
snow level will be near 8000 feet. A second frontal system will
bring another 1 to 4 inches on 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 presents 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 for most areas though some may
get close to moderate severity. 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 details.



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


Special Statement
Issued: 4:04 AM PST Nov. 21, 2017 – National Weather Service

... Heavy rainfall today and tonight will 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 today and
tonight. 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


Www.Weather.Gov/Seattle

404 am PST Tue Nov 21 2017

... Heavy rainfall today and tonight will 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 today and
tonight. 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


Www.Weather.Gov/Seattle


Areal Flood Watch
Issued: 10:13 AM PST Nov. 21, 2017 – National Weather Service

... Flood Watch remains in effect from 4 PM PST this afternoon
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
Thurston.

* From 4 PM PST this afternoon through Thursday afternoon

* rain has begun ahead of a warm front and the plume of
subtropical moisture with it that will bring 2 to 5.5 inches of
rain to the Olympics and Mount Rainier today and tonight, and 1
to 4 inches of rain to the Cascades north of Mount Rainier. The
snow level will be near 8000 feet. A second frontal system will
bring another 1 to 4 inches on 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 presents 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 for most areas though some may
get close to moderate severity. 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 details.



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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