Small Craft Advisory 32, NWS Seattle, WA

Area Forecast Discussion
National Weather Service Seattle WA
830 PM PST Sun Feb 4 2018

.SYNOPSIS...A frontal system moved inland. Showers will mainly be in
the Cascades and the Puget Sound Convergence Zone through Monday
night. A weather system moving into British Columbia Tuesday and
Wednesday will just brush the north part of Western Washington. A
front will move through the region Thursday afternoon and night. Dry
weather is possible for the end of the week.

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.SHORT TERM...The flood watch has been cancelled for Lewis and
Thurston counties. The wet frontal system has moved inland. A few
showers with partial clearing at times will be the rule for much of
the lowlands through Monday. The Cascades will have more showers,
but the snow level will be around 3500 feet so that is a step in the
right direction. There will likely be convergence zone activity at
times.

.LONG TERM...Weak drippy dirty ridge precip is possible in the north
for the middle of the week. A front is likely Thursday afternoon and
evening. There is a good chance of dry weather for the end of the
week.

&&

.AVIATION...NW flow aloft through Monday. Low level onshore flow
will ease Monday. The air will remain moist, although some
partial clearing periods are likely now behind the front. As the air
stabilizes and the winds relax overnight there is a good chance
that low cloud cover will become more solid through the rest of
the night into the morning hours on Monday, and then some
improvement is possible into the afternoon.

KSEA....Mostly cloudy skies and a southwest breeze should continue
through Monday. A PSCZ will set up but it should remain well north
of Seattle--staying up in Snohomish County.

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.MARINE...Strong low level onshore flow will gradually ease
overnight. Gale force westerlies developed midday in the central and
eastern Strait of Juan de Fuca, and they should continue til around
midnight. The next significant front should reach the area Thursday,
followed by northeast flow on Friday.

&&

.HYDROLOGY...After we get through the rivers cresting tonight
they'll recede Monday and there should not be any renewed threat of
flooding in the week ahead. A threat of landslides remains over the
area through Monday due to recent rainfall on top of saturated
soils. The special weather statement was updated for the increased
landslide threat.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Flood Watch through late Monday night for Whatcom, Skagit,
     Snohomish, King, and Pierce counties.

PZ...Small Craft Advisory until midnight PST tonight for Coastal
     Waters From Cape Flattery To James Island 10 To 60 Nm-
     Coastal Waters From James Island To Point Grenville 10 To
     60 Nm-Coastal Waters From Point Grenville To Cape
     Shoalwater 10 To 60 Nm-Northern Inland Waters Including The
     San Juan Islands-Puget Sound and Hood Canal.

     Small Craft Advisory from midnight tonight to 6 PM PST Monday
     for Central U.S. Waters Strait Of Juan De Fuca-East
     Entrance U.S. Waters Strait Of Juan De Fuca.

     Gale Warning until midnight PST tonight for Central U.S. Waters
     Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of
     Juan De Fuca.

     Small Craft Advisory until 3 AM PST Monday for Admiralty Inlet-
     West Entrance U.S. Waters Strait Of Juan De Fuca.

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