Weather Alerts for West Olympia

Issued by the National Weather Service

Flood Watch  FLOOD WATCH   Flood Watch

Areas Affected:
Clallam - Grays Harbor - Island - Jefferson - King - Kitsap - Lewis - Mason - Pierce - San Juan - Skagit - Snohomish - Thurston - Whatcom
Effective: Thu, 11/30 9:35pm Updated: Fri, 12/1 5:30am Urgency: Future
Expires: Thu, 12/7 4:00am Severity:  Moderate  Certainty: Possible

.An active weather pattern will continue with a series of frontal
systems set to move across the Pacific Northwest through the middle
of next week bringing multiple rounds of rain and mountain snow with
increasing intensity through the weekend and into next week. Current
snow levels around 2700 feet this evening will rise closer to 6000
to 7000 feet by Sunday and then closer to 8000 to 9000 feet Monday
evening as persistent atmospheric river moisture advects into the
Western Washington. Prolonged heavy rainfall will lead to rapid
rises on rivers Sunday into early next week, especially when
combined with melting snow as snow levels most notably rise Sunday
and Monday.
Numerous rivers are currently forecast to go into flood stage, some
from Moderate to near Major, starting with the Skokomish River in
Mason County late Saturday then eastward with many of the Cascade
Rivers by early next week. Excessive rainfall may also lead to
isolated residential and/or urban flooding.
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...Portions of northwest and west central Washington,
including the following counties, in northwest Washington,
Clallam, Grays Harbor, Island, Jefferson, Kitsap, Mason, San Juan,
Skagit and Whatcom. In west central Washington, King, Lewis,
Pierce, Snohomish and Thurston.
* WHEN...From Saturday evening through late Wednesday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Extensive
street flooding and flooding of creeks and rivers are possible.
- Excessive rainfall from a long-duration atmospheric river
event. Total rainfall forecast has increased with total
liquid accumulation through Wednesday of next week ranging
from 3 to 7 inches over the lowlands to upwards of 10 to 12
inches over the Cascades and 10 to 15 inches over the

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.