Richland, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

683
FXUS66 KPDT 130000
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
500 PM PDT Thu Jun 12 2025

.Updated Aviation Discussion.


.AVIATION...00Z TAFS...VFR conditions currently across all sites,
which will stay the course through the period. There are active
wildfires in the vicinity of KDLS/KPDT/KALW/KPSC, but confidence in
the timing and severity of smoke related visibility reductions
are too low at this time to include in the taf. A weak system will
be moving through the area this evening, allowing for a low
chance of rain (20-30%) across KPDT/KALW with very low chances
(5-10%) for KRDM/KBDN/KPSC. Elevated gusts of 20-30kts will
continue for KDLS/KPDT/KRDM/KBDN/KALW through this evening,
dissipating tonight with the exception of KDLS still experiencing
20-25kt gusts that will extend through the period. 75



&&

.PREV DISCUSSION... /issued 158 PM PDT Thu Jun 12 2025/

SHORT TERM...Today through Saturday night...Breezy to locally
windy southwesterly to northwesterly winds are present across much
of the Columbia Plateau region this afternoon, driven by cross-
Cascade pressure and temperature differences of roughly 5-9 mb and
15-25 degrees, respectively. Coupled with RHs in the teens to
twenties, this is driving elevated fire weather conditions this
afternoon. Have opted not to issue any Red Flag Warnings due to
very limited coverage of overlapping wind/RH conditions within
declared fire weather zones.

Winds through the Kittitas Valley have been just below advisory
criteria (sustained winds of 30 mph or gusts of 45 mph).
Confidence in reaching criteria is medium (40-60%) so have held
off on issuing any wind highlights.

Looking ahead, ensemble NWP is in excellent agreement that a
couple shortwaves visible offshore in the Pacific will move
onshore overnight through Friday. Forcing from the first
shortwave may be able to tap into some weak elevated instability
overnight and generate elevated showers along a line from central
Oregon to southeast Washington. Confidence in lightning is low
(10% or less) given meager CAPE profiles in forecast soundings.

Friday afternoon, have introduced a slight chance (15%) of
thunder from central Oregon east through the Blue Mountains.
Instability is limited (300 J/kg or less) in forecast soundings,
but forcing from the second shortwave coupled with negative mid-
level (700-500 mb) Theta-E lapse rates and sufficiently moist mid
levels may be enough to get isolated showers and thunderstorms.
Confidence in occurrence of thunder somewhere within the
aforementioned region is medium (50%), lower than average.

Breezy to locally windy southwesterly to northwesterly winds will
again be present Friday, also in tandem with low RHs. However,
high temperatures in the 70s to lower 80s should keep RHs just
high enough to avoid Red Flag conditions. Will note elevated fire
weather conditions across much of the Columbia Plateau again.

Dry conditions are forecast for Saturday into Saturday night.
Plunkett/86

LONG TERM...Sunday through Wednesday...Ensemble NWP suggests some
form of a trough will be present through the period, with all
clusters of ensemble members indicating some flavor of a shortwave
for Sunday into Monday. Have held off introducing thunder into the
forecast for Sunday and Monday at this time due to medium
confidence (40%) in all ingredients necessary for convection.

Looking ahead to Tuesday and Wednesday, ensemble clusters show a
more zonal pattern aloft with above-normal 500-mb heights to our
south and below-normal 500-mb heights to our north. Westerly winds
through the Cascade gaps are expected, with a slight chance to
chance (15-50%) of showers along the Cascades. Plunkett/86


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  80  49  81 /  10  10   0   0
ALW  58  80  53  81 /  10  10  10   0
PSC  54  84  53  84 /  10   0   0   0
YKM  51  82  50  83 /   0   0   0   0
HRI  54  83  51  84 /  10   0   0   0
ELN  50  76  50  80 /   0   0   0   0
RDM  41  74  40  79 /  10  10   0   0
LGD  51  76  46  79 /  40  20  10   0
GCD  48  78  44  81 /  30  20  10   0
DLS  52  75  52  80 /   0   0   0   0

&&

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

$$

SHORT TERM...86
LONG TERM....86
AVIATION...75