Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 182308 AAA
AFDPDT

Area Forecast Discussion...UPDATED
National Weather Service Pendleton OR
408 PM PDT Sun Aug 18 2019


.AVIATION...
00Z TAFS...VFR conditions will continue through Monday, with few
if any clouds. Gusts to 25 kts at DLS and 15 to 20 kts at RDM will
decrease after sunset. All other locations will be 10 kts or less.
Gusts of 20 to 25 kts are psbl Monday aftn at DLS and 15 to 20 kts
at PDT, RDM, BDN, and ALW.

&&

.PREV DISCUSSION... /issued 121 PM PDT Sun Aug 18 2019/

SHORT TERM...Tonight through Wednesday...Sunny skies prevail
area wide this afternoon under dry westerly flow aloft. Channeled
W/NW flow through the Cascade gaps will produce breezy conditions
late this afternoon/evening across the Gorge/Kittitas Valley.
Mostly clear skies will prevail through Tuesday night under the
dry west/northwest flow pattern. A trough of low pressure will
approach the coast Wednesday, with a weak frontal boundary nearing
the Cascade crest Wednesday afternoon. Latest model concensus
shows a little greater deep layer moisture, perhaps enough for
a few showers across the east slopes of the Cascades of WA late
Wednesday. Further east, the main concern Wednesday will be the
wind. With increasing pressure gradients, expect breezy to windy
conditions for the Gorge and Kittitas Valley, perhaps extending
as far east as the Columbia Basin. Will monitor for possible fire
weather impacts, but forecast wind/RH conditions look to
remain under red flag criteria. Seasonably hot temperatures will
prevail for the short term, with Tuesday looking like the hottest
day, with lower elevation highs in the lower/mid 90s.

LONG TERM...Wednesday night through Sunday.  Wednesday night, a
weak front tries to cross the east of the Cascades, but appears to
be stretched apart with little precipitation for the region.  GFS is
the strongest with this feature and hold the moisture/dynamics
together for a slight chance over the northeast Oregon mountains.
Main effect will be some breezy winds Wednesday night.  West to
northwest flow is then expected through the rest of the extended
with dry conditions and a few period of breezy winds, mainly Friday
and again Sunday.  Temperatures will be around seasonal values in
the mid 80s to lower 90s.

AVIATION...18Z TAFS...VFR conditions through the period. A few high
level cirrus clouds becoming clear overnight.  Winds will be 5-15 kt
this afternoon and early evening but 15-25 kt at KDLS before
diminishing overnight.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  87  55  92 /   0   0   0   0
ALW  60  90  60  96 /   0   0   0   0
PSC  61  90  60  95 /   0   0   0   0
YKM  56  89  56  94 /   0   0   0   0
HRI  59  91  57  95 /   0   0   0   0
ELN  56  85  55  91 /   0   0   0   0
RDM  50  87  52  92 /   0   0   0   0
LGD  55  86  55  93 /   0   0   0   0
GCD  55  91  55  96 /   0   0   0   0
DLS  61  87  61  94 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

$$

80/93/77


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