Area Forecast Discussion
Issued by NWS Pendleton, OR

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914
FXUS66 KPDT 251132
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
424 AM PDT WED MAY 25 2016

.SHORT TERM...Today through Friday night...Weak flow aloft
today is associated with a broad long wave mid/upper level trough.
Very marginal shallow layer of instability will yield scattered rain
showers in the Blue Mountains eastward to Idaho this afternoon.
Elsewhere, dry conditions expected through this afternoon. Tonight
and Thursday westerly flow aloft will occur across forecast area
ahead of a large upper low digging southeast over British Columbia.
This flow pattern will produce dry conditions across the region
through Thursday afternoon. Thursday night and Friday the
aforementioned low opens up to a broad upper level trough, which
covers British Columbia as well as WA/OR. Forecast area will remain
on the southern flank of the trough thus giving us westerly flow
aloft and therefore dry conditions through Friday afternoon, except
for slop over showers along the east slopes of the WA/OR Cascades.
Friday night the same synoptic scale flow pattern continues in place
for a continuation of dry conditions, but with a chance of showers
near the crests of the Cascades.  polan

.LONG TERM...Saturday through Tuesday. Weak upper level trough over
the region Saturday and Sunday with northwest flow aloft. Scattered
showers over the Cascades and Blues otherwise partly to mostly
cloudy skies. Temperatures near normal with highs in the 60s to mid
70s. Upper level ridge building into the area Monday and Tuesday
with partly cloudy skies and warmer temps. Highs in the 70s with
near 80 in the Columbia basin. No significant winds expected through
the extended period. 94

&&

.AVIATION...12Z TAFS. Sct-bkn 040-070 today and tonight. Winds
increasing late morning into the afternoon becoming westerly 10-
25kt.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  73  48  69  46 /   0  10  10  10
ALW  75  52  70  50 /  10  10  10  10
PSC  81  52  76  50 /   0  10   0  10
YKM  78  48  72  44 /   0  10   0  10
HRI  79  51  73  49 /   0  10   0  10
ELN  72  48  65  46 /   0  10  10  10
RDM  67  38  65  36 /  10  10  10  10
LGD  67  44  65  42 /  20  10  10  10
GCD  68  42  66  41 /  10  10  10  10
DLS  73  52  68  51 /   0  10  10  10

&&

.PDT Watches/Warnings/Advisories...
OR...None.
WA...None.
&&

$$

99/94/94



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