133
FXUS66 KPDT 272113
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
213 PM PDT Thu Jun 27 2024

.SHORT TERM...Today through Saturday...Latest water vapor imagery
shows broad troughing encompassing much of the PacNW. As a result,
winds have been breezy across the forecast area, peaking at around
35 mph through the Basin and Gorge, with amounts closer to 40 mph in
the Kittitas Valley. Despite lift under the trough axis, the airmass
overhead is relatively cool and dry, thus limiting shower activity
to the Washington Cascade crests. Even then, shower activity is
beginning to wind down as we head into the early evening hours as
the center of the trough enters western Montana.

Transitory ridging will then move in for Friday and Saturday,
leaving us with benign weather and a brief warming trend before
another trough arrives on Sunday. Winds will be light and out of the
east Friday, shifting more westerly on Saturday as the
aforementioned Sunday trough begins to gain more influence over the
PacNW. Highs will climb into the upper 80s across the lower Basin
by Saturday, with 70s and 80s elsewhere. Evans/74

.LONG TERM...Sunday through Thursday...Seasonable temperatures
and gusty winds will be the highlight for Sunday through Monday
with an upper trough across the PacNW. Low confidence (<20%) on
isolated showers impacting the crests of the WA/OR Cascades and
Wallowa County due to limited moisture from the dry trough.
Temperatures will cool by a few degrees with the trough passing
Sunday through Monday. Tuesday onward, temperatures will then warm
a few degrees above normal again with the arrival of a ridge
across the forecast area.

Late Sunday afternoon through Monday night will have gusty winds at
25-35 mph around the Columbia Basin, Columbia River Gorge, Kittitas
and Yakima valleys. This is because of the tightened surface
pressure gradient along the Cascades from the trough. Probability is
low to moderate (30-50%) for wind gusts exceeding 40-45 mph. Tuesday
through Thursday, winds will settle down with the upper ridge
building over the forecast area. Breezy conditions will continue
across the forecast area with wind gusts at around 15-25 mph (<50%
confidence). Feaster/97

&&

.AVIATION...18Z TAFS (Previous Discussion)...All sites in VFR
during this period with current few to sct clouds within these
areas. Gusty winds will be a concern for all sites around 20-30kts
with sustained winds at 12-20kts. Wind conditions should improve
early tonight. Feaster/97

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  81  54  84 /   0   0   0   0
ALW  52  83  57  88 /   0   0   0   0
PSC  53  85  59  89 /   0   0   0   0
YKM  48  83  56  85 /   0   0   0   0
HRI  51  85  56  89 /   0   0   0   0
ELN  49  82  55  82 /   0   0   0   0
RDM  42  80  48  80 /   0   0   0   0
LGD  45  78  52  86 /   0   0   0   0
GCD  45  82  51  88 /   0   0   0   0
DLS  52  85  58  85 /   0   0   0   0

&&

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

$$

SHORT TERM...74
LONG TERM....97
AVIATION...97