Kennewick, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

062
FXUS66 KPDT 290241
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
741 PM PDT Sun Jun 28 2026

.KEY MESSAGES...

- Widespread breezy to windy conditions through this evening,
  strongest winds in the Kittitas Valley

- Morning showers in eastern portions of the Columbia Basin
  tomorrow

- Below-normal temperatures, breezy to locally windy west
  winds, and occasional light mountain showers through the week

&&

.UPDATE...
A strong cross-Cascade pressure gradient has persisted this
afternoon, peaking thus far at a 13-mb difference between PDX
(Portland) and GEG (Spokane). Widespread breezy to windy
westerly winds of 20-35 mph with gusts of 35-45 mph have
expanded eastward across north-central Oregon, the lower
Columbia Basin of Oregon, and the foothills of the Blue
Mountains of Oregon. Have opted to expand the Wind Advisories to
include the aforementioned zones through 11 PM this evening.

&&

.DISCUSSION...
Water vapor satellite imagery this afternoon shows a closed low
centered along the MT/Alberta/Saskatchewan border, which
facilitated a shortwave passage over the forecast area earlier
today. Showers associated with this shortwave continue to push
south across Wallowa, Union, and Grant counties this afternoon,
with shower activity expected to diminish by early this evening.
Otherwise, a surface low strengthening under the upper low has
resulted in a tightening cross-Cascade pressure gradient, with
breezy to locally windy westerly winds (15-30 mph with gusts
25-45 mph) spilling through the Cascade gaps and into the lower
elevations. The strongest winds so far have been noted in
portions of the Kittitas Valley and the eastern Columbia River
Gorge, with gusts up to 50 mph and sustained winds around 30
mph.

Monday through Thursday: A prolonged troughing pattern
supported by periodic shortwave passages will remain over the
PacNW through the workweek. The upper low will continue to
meander east tonight through Monday, with the next round of
shower activity expected to arrive across the eastern third of
the forecast area with a shortwave passage late tonight through
tomorrow morning. There is increasing confidence (55-75%) that
showers will also impact eastern portions of the Columbia Basin
(including Tri-Cities and Hermiston) tomorrow morning, with
heaviest showers expected along the WA Blue Mountain foothills.

Cluster ensemble guidance remains in good agreement of a
shortwave trough diving down the AK/BC coastlines and across
the PacNW Tues/Wed which will bring another round of light
mountain rain showers (confidence 55-75%). Another shortwave
trough is advertised to drop into the PacNW Thursday, however,
over the last 24 hours, ensemble and deterministic guidance has
trended drier with this system. Confidence in another round of
light mountain showers for Thursday is low-mod (30-45%).

Breezy winds will remain in place across the lower elevations
and Cascade gaps through much of the work week as the troughing
pattern persists overhead. After today, winds will generally be
between 15-25 mph with gusts up to 40 mph throughout the week.

Lastly, the persistent trough pattern will keep temperatures
much cooler than normal through the week, with afternoon
temperatures generally 5 to 15 degrees below normal (confidence
60-75%). This means that afternoon temperatures in the lower
elevations will be in the 70s, with locally 80s, throughout much
of the week. In the mountains, mid-elevations will generally be
in the upper 50s to 60s, with lower to mid 50s in the high-
elevations.

Friday and Saturday: Late Friday into Saturday, ensemble
cluster guidance is in agreement of the upper trough pushing
east, with a quasi-zonal flow and weak upper level high
pressure developing over the PacNW (confidence 40-65%). This
will result in a warming trend into near to above normal
temperatures across the forecast area (80s in the lower
elevations, 60s and 70s mountains) with dry conditions and light
winds by Saturday. Lawhorn/82

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
VFR conditions will persist through the forecast period. Winds
will continue to be be the primary concern with all TAF sites
seeing breezy conditions that range between 12-22 kts sustained
with gusts between 21-30kts.

&&

.Preliminary Point Temps/PoPs...
PDT  53  73  48  75 /  10  50  10   0
ALW  54  74  54  76 /  60  70  10   0
PSC  57  79  51  80 /  30  50  10   0
YKM  59  82  52  82 /   0  10  10   0
HRI  55  77  50  78 /   0  30  10   0
ELN  54  72  49  73 /  10  10  10   0
RDM  42  71  36  73 /   0   0   0   0
LGD  50  69  46  74 /  30  60  10  10
GCD  46  71  42  75 /   0  10  10   0
DLS  57  72  53  72 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
WA...Wind Advisory until 11 PM PDT this evening for WAZ024-026.
OR...Wind Advisory until 11 PM PDT this evening for ORZ041.
     Wind Advisory until 11 PM PDT this evening for ORZ044-507-508-
     510.

&&

$$

UPDATE...86
DISCUSSION...82
AVIATION...90