Area Forecast Discussion
Issued by NWS Pendleton, OR

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802
FXUS66 KPDT 202321
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
421 PM PDT Tue Aug 20 2019

.AVIATION...
00Z TAFS...VFR conditions to continue through tonight and into
Wednesday. Mainly high clouds tonight and early Wednesday will
thicken and lower, especially for DLS, RDM and BDN with a midlevel
CIG by afternoon. Otherwise, gusty winds will continue through the
evening before decreasing to mainly 10 kts or less. Gusts will
return on Wednesday mainly 15 t0 20 kts at PDT, BDN and RDM and up
to 25 kts at DLS.

&&

.PREV DISCUSSION... /issued 133 PM PDT Tue Aug 20 2019/

SHORT TERM...Tonight through Friday night...An upper level ridge of
high pressure will be over the region tonight with some high clouds
passing through the area. The ridge will move off to the east on
Wednesday as an upper level trough moves inland and pushes a cold
front through the forecast area in the afternoon and evening. Main
impact of the front will be some increasing westerly winds behind
the front. There will also be some rain showers ahead of the front
and a slight chance of thunderstorms over eastern Grant and Wallowa
counties through the evening. Cooler air will filter into the region
Wednesday night and Thursday as the upper level trough passes over
the region. There will be some lingering locally breezy conditions
Thursday along the east slope of the Cascades. Temperatures will
begin to rebound Friday as a dry flat westerly flow returns.

LONG TERM...Saturday through Tuesday...A quiet,dry pattern sets up
for the weekend and early next week. Dominant flow across the region
will be zonal/northwesterly through at least next Tuesday. This will
keep temperatures near normal with afternoon highs in the mid to
upper 80s for the lower elevations and 70s expected for the
mountains. Locally breezy winds sustained between 10-20 mph with
gusts ~30 mph are expected for Saturday and Sunday afternoon through
the Columbia River Gorge, Columbia Basin, and Kittitas Valley and
will diminish heading into early next week. Richards



&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  62  88  56  80 /   0   0  30   0
ALW  63  90  60  82 /   0   0  30  10
PSC  62  90  61  84 /   0  10  30   0
YKM  58  83  54  82 /   0  40  20   0
HRI  63  90  57  83 /   0  10  30   0
ELN  57  81  56  79 /   0  40  20   0
RDM  52  87  46  81 /   0  20  30   0
LGD  55  90  52  77 /   0   0  30  10
GCD  58  92  54  80 /   0   0  30   0
DLS  61  79  59  81 /   0  40  20   0

&&

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

$$

91/75/77



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