Kennewick, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

261
FXUS66 KPDT 260513
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1013 PM PDT Wed Jun 25 2025

Updated Aviation Discussion

.AVIATION...06z TAFs...VFR conditions expected. Sct-bkn mid to
high clouds will prevail through the period. Winds will lighten
overnight before picking back up once again across all sites
during the day Thursday, gusting up to 20 kts at times, mainly out
of the W and NW. Evans/74

&&

PREV DISCUSSION... /issued 156 PM PDT Wed Jun 25 2025/

SHORT TERM...Today through Friday...Current satellite and
radar imagery show clear skies across the forecast area with few
clouds forming over portions of Kittitas and Yakima Valley including
John Day Highlands. Thanks to the southwest flow, isolated
thunderstorms will develop over the eastern mountains this afternoon
through evening. Abundant lightning may be main threat with a 30-50%
probability, suggested from HREF 4-hr prob of thunder. CAMs show
CAPE values to be about 500-800 J/Kg with the raw ensembles favoring
a 30-50% prob for very light showers. That said, it is doubtful for
these storms to be severe due to weak instability and lack of
moisture support. Showers may linger over the Wallowas tonight
before gradually decreasing Thursday. Dry conditions will return
Friday.

Breezy to locally windy conditions will continue for this period
across the Cascade Gaps, influenced from the strong pressure
gradients. The raw ensembles suggest a >50% prob for gusts exceeding
to 30 mph over the Columbia River Gorge and Kittitas Valley today
and tomorrow in the afternoons, but mainly the Gorge for Friday
afternoon also. There is a 30-40% chance of gusts at 35 mph as well.
Otherwise, winds will remain breezy for the remaining forecast area.

Temperatures will remain mainly in the 70s and 80s across majority
of the forecast area through this term. However, the Columbia Basin
will be in the high 80s and low 90s before slightly cooling by few
degrees tomorrow into Friday. RH values continue in recovery through
Friday as this weak system passes. Feaster/97

LONG TERM...Saturday through Wednesday...Warm, dry conditions
prevail through the weekend before the system arrives Monday and
Tuesday. Showers will develop across the Southern Blues and eastern
mountains with a slight chance (<30%) of thunderstorms over the high
terrains of central OR Monday evening. Severity is less likely due
to weak instability and low moisture level, though CG lightning
could be threatening.

Temperatures remain trending upward into next week with RHs
gradually decreasing to the teens and 20s. Sunday onwards, temps
will reach into the 90s or higher with Monday and Tuesday being our
warmest and driest days of this period with temperatures reaching
to the low 100s across the Columbia Basin (>60% confidence). That
said, this could potentially raise concerns for critical fire
conditions. Heat Risk will remain moderate across most of the
forecast area Sunday and beyond, but with portions of the Columbia
Basin remaining in pockets of Major Heat Risk Monday and Tuesday.

Winds will be light with occasional breezes for this long term
period. Feaster/97

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  82  55  83 /  10   0   0   0
ALW  61  81  58  81 /  10   0   0   0
PSC  58  84  56  86 /   0   0   0   0
YKM  56  81  53  81 /   0  10   0   0
HRI  59  83  56  85 /  10   0   0   0
ELN  55  75  54  77 /   0  10   0   0
RDM  45  79  44  80 /   0   0   0   0
LGD  54  80  51  78 /  10  10   0   0
GCD  51  83  49  81 /  10   0   0   0
DLS  59  76  57  80 /  10   0   0   0

&&

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

$$

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