Weather Alerts for Snohomish County

Issued by the National Weather Service

Winter Storm Watch  WINTER STORM WATCH   Winter Storm Watch
SNOHOMISH COUNTY

Areas Affected:
Cascades of Whatcom and Skagit Counties - Cascades of Snohomish and Northern King Counties - Cascades of Southern King County - Cascades of Pierce and Lewis Counties - Olympics
Effective: Mon, 12/15 1:27am Updated: Mon, 12/15 3:15am Urgency: Future
Expires: Mon, 12/15 12:00pm Severity:  Severe  Certainty: Possible

 
Details:
...HEAVY SNOW POSSIBLE IN THE CASCADES AND OLYMPICS TUESDAY NIGHT
AND WEDNESDAY...

* WHAT...Heavy snow possible. Total snow accumulations of one and a
half to three feet. Winds could gust as high as 70 mph.

* WHERE...Cascades of Snohomish and Northern King Counties, Cascades
of Whatcom and Skagit Counties, Olympics, Cascades of Pierce and
Lewis Counties, and Cascades of Southern King County.

* WHEN...From Tuesday evening through Wednesday evening.

* IMPACTS...Travel could be very difficult to impossible. Very
strong winds could cause extensive tree damage.

Information:
Monitor the latest forecasts for updates on this situation.

Wind Advisory  WIND ADVISORY   Wind Advisory
SNOHOMISH COUNTY

Areas Affected:
San Juan County - Lowlands of Western Whatcom County - Lowlands of Western Skagit and Northwestern Snohomish Counties - Downtown Everett / Marysville Area - Shoreline / Lynnwood / South Everett Area - Eastside - City of Seattle - Lowlands of Pierce and Southern King Counties - Olympia and Southern Puget Sound - Lowlands of Lewis and Southern Thurston Counties - Middle Chehalis River Valley - Willapa and Black Hills - Southern Hood Canal - Northern Hood Canal - Eastern Kitsap County - Port Townsend Area - Western Strait of Juan de Fuca - Foothills of the Western and Southern Olympic Peninsula - Northern Washington Coast - Grays Harbor County Coast - Lower Chehalis River Valley - Island County
Effective: Mon, 12/15 12:45am Updated: Mon, 12/15 3:15am Urgency: Expected
Expires: Mon, 12/15 11:45am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...For the Wind Advisory, southwest winds 20 to 30 mph with
gusts up to 55 mph. For the High Wind Watch, southwest winds 25 to
45 mph with gusts 55 to 65 mph possible.

* WHERE...Portions of northwest and west central Washington.

* WHEN...For the Wind Advisory, until 10 PM PST this evening. For
the High Wind Watch, from Tuesday evening through Wednesday
morning.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles. Gusty winds could blow
around unsecured objects. Tree limbs could be blown down and a few
power outages may result.

* ADDITIONAL DETAILS...Due to saturated grounds from previous heavy
rain, expect more widespread impacts with these winds.

Information:
Monitor the latest forecasts and warnings for updates.

Use extra caution when driving, especially if operating a high
profile vehicles. Secure outdoor objects.

Secure outdoor objects.

Flood Watch  FLOOD WATCH   Flood Watch
SNOHOMISH COUNTY

Areas Affected:
Clallam, WA - Grays Harbor, WA - Jefferson, WA - King, WA - Kitsap, WA - Lewis, WA - Mason, WA - Pierce, WA - Skagit, WA - Snohomish, WA - Thurston, WA - Whatcom, WA
Effective: Sun, 12/14 4:37pm Updated: Mon, 12/15 3:15am Urgency: Future
Expires: Mon, 12/15 5:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of northwest 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, Pierce,
Snohomish and Thurston.

* WHEN...From Monday morning through Thursday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas. Storm drains and ditches may
become clogged with debris. Area creeks and streams are running
high and could flood with more heavy rain.

* ADDITIONAL DETAILS...
- A series of weather systems this week will bring another
round of significant rainfall to western Washington late
tonight through Wednesday. Preliminary liquid totals of 2 to
6 inches, locally higher in some spots, will cause additional
sharp rises to area rivers.
Urban and small stream flooding remains possible for areas
with poor drainage.

Very saturated soils will maintain increased risk for
potential landslides and debris flows off of burn scars.

- Http://www.weather.gov/safety/flood

Information:
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.

High Wind Watch  HIGH WIND WATCH   High Wind Watch
SNOHOMISH COUNTY

Areas Affected:
San Juan County - Lowlands of Western Whatcom County - Lowlands of Western Skagit and Northwestern Snohomish Counties - Downtown Everett / Marysville Area - Shoreline / Lynnwood / South Everett Area - Eastside - City of Seattle - Lowlands of Pierce and Southern King Counties - Olympia and Southern Puget Sound - Lowlands of Lewis and Southern Thurston Counties - Middle Chehalis River Valley - Willapa and Black Hills - Southern Hood Canal - Northern Hood Canal - Eastern Kitsap County - Port Townsend Area - Western Strait of Juan de Fuca - Foothills of the Western and Southern Olympic Peninsula - Northern Washington Coast - Grays Harbor County Coast - Lower Chehalis River Valley - Island County
Effective: Mon, 12/15 12:45am Updated: Mon, 12/15 3:15am Urgency: Future
Expires: Mon, 12/15 11:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...For the Wind Advisory, southwest winds 20 to 30 mph with
gusts up to 55 mph. For the High Wind Watch, southwest winds 25 to
45 mph with gusts 55 to 65 mph possible.

* WHERE...Portions of northwest and west central Washington.

* WHEN...For the Wind Advisory, until 10 PM PST this evening. For
the High Wind Watch, from Tuesday evening through Wednesday
morning.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles. Gusty winds could blow
around unsecured objects. Tree limbs could be blown down and a few
power outages may result.

* ADDITIONAL DETAILS...Due to saturated grounds from previous heavy
rain, expect more widespread impacts with these winds.

Information:
Monitor the latest forecasts and warnings for updates.

Use extra caution when driving, especially if operating a high
profile vehicles. Secure outdoor objects.

Secure outdoor objects.

High Wind Watch  HIGH WIND WATCH   High Wind Watch
SNOHOMISH COUNTY

Areas Affected:
Foothills and Valleys of the North Cascades - Foothills and Valleys of Snohomish and Northern King Counties - Foothills and Valleys of Central King County - Foothills and Valleys of Pierce and Southern King Counties - Foothills and Valleys of Thurston and Lewis Counties - Eastern Strait of Juan de Fuca - Lake Crescent Area Including US 101
Effective: Mon, 12/15 12:45am Updated: Mon, 12/15 3:15am Urgency: Future
Expires: Mon, 12/15 11:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Southwest winds 25 to 45 mph with gusts 55 to 65 mph
possible.

* WHERE...Eastern Strait of Juan de Fuca, Foothills and Valleys of
the North Cascades, Lake Crescent Area Including US 101, Foothills
and Valleys of Central King County, Foothills and Valleys of
Pierce and Southern King Counties, Foothills and Valleys of
Snohomish and Northern King Counties, and Foothills and Valleys of
Thurston and Lewis Counties.

* WHEN...From Tuesday evening through Wednesday morning.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.

* ADDITIONAL DETAILS...Saturated soils from heavy rain ahead of the
event will make it easier for these winds to create widespread
impacts.

Information:
Monitor the latest forecasts and warnings for updates.

Special Weather Statement  SPECIAL WEATHER STATEMENT   Special Weather Statement
SNOHOMISH COUNTY

Areas Affected:
San Juan County - Cascades of Whatcom and Skagit Counties - Cascades of Snohomish and Northern King Counties - Cascades of Southern King County - Cascades of Pierce and Lewis Counties - Foothills and Valleys of the North Cascades - Foothills and Valleys of Snohomish and Northern King Counties - Foothills and Valleys of Central King County - Foothills and Valleys of Pierce and Southern King Counties - Foothills and Valleys of Thurston and Lewis Counties - Lowlands of Western Whatcom County - Lowlands of Western Skagit and Northwestern Snohomish Counties - Downtown Everett / Marysville Area - Shoreline / Lynnwood / South Everett Area - Eastside - City of Seattle - Lowlands of Pierce and Southern King Counties - Olympia and Southern Puget Sound - Lowlands of Lewis and Southern Thurston Counties - Middle Chehalis River Valley - Willapa and Black Hills - Southern Hood Canal - Northern Hood Canal - Eastern Kitsap County - Port Townsend Area - Eastern Strait of Juan de Fuca - Western Strait of Juan de Fuca - Lake Crescent Area Including US 101 - Olympics - Foothills of the Western and Southern Olympic Peninsula - Northern Washington Coast - Grays Harbor County Coast - Lower Chehalis River Valley - Island County
Effective: Sun, 12/14 10:38am Updated: Mon, 12/15 3:15am Urgency: Expected
Expires: Mon, 12/15 10:45am Severity:  Moderate  Certainty: Observed

 
Details:
Rainfall from the past week has increased soil moisture to high
levels across western Washington. Additional rainfall of around 2-6
inches is expected early this week. This amount of rain will put
extra pressure on soil instability, leading to an increased threat of
landslides and debris flows, especially from recent burned areas.
This rain event could act as a trigger for new landslides.

Areas most susceptible to landslides debris flows under these
conditions are steep coastal bluffs, other steep hillsides or
road cuts, and recent burned areas. A diminishing threat of
landslides and debris flows will continue for several days after
the rain ends.

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