Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA
FXUS66 KSEW 012225
Area Forecast Discussion
National Weather Service Seattle WA
325 PM PDT FRI JUL 1 2016
.SYNOPSIS...Weak fronts will bring a slight chance of rain at
times. Otherwise, onshore flow will bring a mix of clouds and
sunshine and near normal temperatures for the next several days.
.SHORT TERM...The remnants of a weak front are currently
dissipating over the north interior. Tonight should be dry after
the last few sprinkles fade away late this afternoon. Onshore flow
should allow low clouds to fill back in by Saturday morning.
A weak upper trough will be over the area Saturday with low level
onshore flow. There are no obvious weather systems moving through.
There might be some morning drizzle or a few sprinkles but it
should basically be a dry day. Morning clouds should burn off for
partly sunny weather for the interior in the afternoon.
Another weak front will reach the area Sunday. This front should
be similar to the front today with a good chance of rain for the
coast and lesser chances inland. Some sunshine is also likely,
especially for the central and south part of the interior in the
An upper trough will dig across the north part of the forecast
area Monday for a continued chance of showers. The better chances
will be over the north half of the area. Schneider
.LONG TERM...A broad upper trough will remain over the area
Tuesday and Wednesday but no organized weather systems are
expected to move through. Models are beginning to converge on the
idea that a somewhat sharper and wetter upper trough will settle
over the area Thursday and Friday for a showery period. This is
still a pretty new idea in the models and confidence in the
details is not especially high. Schneider
.AVIATION...Westerly flow aloft with low level onshore flow
through Saturday. Weak front dissipating over the northern
portion of the area tonight.
Ceilings in the 4000-5000 foot range from about KHQM to KNUW
northward with dissipating front. South of the front just some
mid and high clouds. Little change this evening. With the low
level onshore flow stratus forming again over the interior in the
10z-14z time frame with ceilings 1500-2500 feet. Stratus
scattering over the interior midday Saturday.
KSEA...Scattered sc with just some high clouds until the early
morning hours. Stratus returning to the terminal around 12z with
ceilings near 1500 feet. Westerly winds until around 01z becoming
light northerly. Winds switching back to southerly 12z-15z
.MARINE...Higher pressure offshore with low pressure inland will
maintain moderate to strong onshore flow through Wednesday. Small
craft advisory strength winds are likely in the strait each
evening. A system Saturday night and Sunday could enhance the
onshore flow enough for possible gales in the central and eastern
PZ...Small Craft Advisory from 6 PM this evening to 5 AM PDT Saturday
for Central U.S. Waters Strait Of Juan De Fuca-East
Entrance U.S. Waters Strait Of Juan De Fuca.
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