Hermiston, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

659
FXUS66 KPDT 141202 CCA
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
402 AM PST Sat Feb 14 2026

.Updated Aviation Discussion...


.KEY MESSAGES...

- Precip activity continues this weekend.

- Moderate to Heavy Mountains snow accumulations Monday onward
  next week.


.DISCUSSION...Current radar and satellite imagery shows light band
of precip moving through portions of the Foothills-Northern Blue
Mountains of OR extending across the Northern Blues and OR Cascades.

With an incoming shortwave trough, precip activity will continue
through this weekend with the help from a weak atmospheric river
(100-200 kg m/s). Storm Total QPF amounts from this morning
through early Monday morning (09Z Sat to 12Z Mon) for the lower
elevations will continue exceeding 0.05 inch or more (>50%
probability) with 0.35 inch or higher for the eastern OR
mountains (Northwest Blues and portions of Wallowa County) and
OR Cascades (50-70% prob). The QPF amounts had slightly trend
downward for the Lower slopes of WA Cascades to 0.05-0.10 inch
with East Slopes of WA Cascades exceeding 0.20 inch or more
(25-40% confidence). Snow accumulations also have trend slightly
downward ranging from 1 to 4 inches for the Northwest Blues,
East Slopes of WA Cascades, but 6 to 12 inches for the mountain
area in Wallowa County today through early Monday morning. Snow
levels will be drop at 2.5 kft or below for Yakima/Kittitas
Valleys with above 3 kft for the remaining forecast area through
this weekend.

Monday through early Thursday morning, heavy snow accumulations will
persist across the mountain areas within a 72-hr period (12Z Monday
through 12Z Thursday). Snow levels will drop to 2.5-3.5 kft Monday
and then further to 1.5-2.5 kft Tuesday through Wednesday. Winter
Weather Advisories may be considered with WA/OR Cascades (mainly the
East slopes of WA Cascades and crest of OR Cascades) seeing a 3-day
Storm Total Snow exceeding 5 inches or more (>50% confidence) and 8
inches or more for the Northwest Blues (20-40% confidence). For now,
Monday will be the first day to be monitored for snow concerns.
Tuesday as well but being 4+ days out, confidence will remain low
(<30%) at this time. Feaster/97

&&


.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...VFR conditions will
prevail for most sites through the period with the exception of KYKM
being in MVFR until later this morning. Light rain may impact all
sites during the day from the system. KRDM/KBDN may see rain
returning this evening with KPSC joining in tonight (<30%
probability). This could also bring down VSBYs and CIGs to MVFR/IFR
conditions for KDLS/KPDT/KYKM/KALW/KPSC (30-50% confidence).
Feaster/97

&&

.Preliminary Point Temps/PoPs...
PDT  36  46  34  47 /  80  30  20  70
ALW  37  47  37  48 /  90  50  30  80
PSC  36  49  35  50 /  60  20  10  60
YKM  33  46  32  43 /  30  10  10  50
HRI  36  49  35  48 /  70  20  20  60
ELN  30  41  29  39 /  20  10  10  50
RDM  28  48  29  44 /  40  10  20  50
LGD  36  51  33  47 /  80  50  30  80
GCD  34  51  33  47 /  50  20  20  70
DLS  38  48  38  45 /  70  20  20  70

&&

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

&&

$$

DISCUSSION...97
AVIATION...97