778 
FXUS66 KSEW 101011
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
311 AM PDT Wed Oct 10 2018

.SYNOPSIS...High pressure aloft will provide dry weather for the
next week. Mostly clear skies will allow for some night and
morning fog. Highs will be near normal.

&&

.SHORT TERM...An upper ridge offshore will produce dry northerly
flow aloft for Western Washington through Friday. A weak weather
system will pass to the north Thursday night and Friday but it is
not expected to have any impact on the area. Light northerly low
level offshore flow will prevail. This pattern is conducive to 
some night and morning fog for the lowlands, especially the usual
valley locations. For this morning, fog looks to be more limited 
due to a weak weather system bringing some mid and high clouds. 
Highs will be near normal the next few days. Schneider

.LONG TERM...Dry weather will continue Saturday through Tuesday
with a strong upper ridge just offshore. Low level offshore flow 
will continue as well. There will probably be some night and 
morning fog in the usual valley locations but the low level 
offshore flow should keep fog from becoming too widespread. 
Temperatures will be near normal. Schneider

&&

.AVIATION...North-northwesterly flow aloft will continue today as
a ridge of high pressure builds offshore. Some low-level stratus 
currently exists across W WA terminals with mostly VFR cigs. 
Expect scattered low-level stratus to continue into early this
afternoon. MVFR/IFR conditions may become more widespread this
morning (12z-17z) as fog develops in prone areas as surface winds
remain light. Mainly clear skies expected this afternoon after 
lingering fog clears. Surface winds remain light.

Widespread MVFR to IFR fog are expected again tonight into 
Thursday morning as skies remain clear with winds light.

KSEA...Above discussion applies. VFR cigs currently expected to 
erode to MVFR/IFR conditions this morning (14z-18z). VFR cigs 
will return by this afternoon. Light and variable winds this 
morning will become northerly in the afternoon with speeds between
4-7 knots. JD

&&

.MARINE...High pressure will remain over the area waters today and 
into the weekend...resulting in lighter winds and a fairly benign 
forecast. Areas of fog will be possible during the overnight and 
early morning hours. Northerly offshore flow at the surface during 
this period will keep wind speeds in check with no headlines 
anticipated for much of the forecast period. SMR

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.

&&

$$

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