011
FXUS66 KPDT 140540
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
940 PM PST Fri Feb 13 2026


.Updated for Aviation...

.KEY MESSAGES...
- Precipitation returns today through this weekend.

- Moderate to heavy mountain snow possible Monday onward next
  week.



&&

.DISCUSSION...
A synoptic scale upper trough, positive tiled from nrn BC into
the eastern Pacific, will shift toward the region through the
weekend, with some feature of a cutoff low at 500 mb developing
over the nrn CA coast. A swrly flow aloft will promote vort
advection and positive lift into wrn WA Tonight, with Mountain
snows increasing with time. IVT around the 100-200 kg/ms will
limit the amount of snow and overall lowland QPF. Snow levels
are already below pass levels. Ahead of the precipitation onset,
HREF ensemble members do not show a returning dense fog signal
across the Lower Columbia Basin/Tri-Cities area Tonight and
Tomorrow morning, like has been seen the previous 48 hours. For
this weekends system, the trend will begin with the mountain
snows and low land rains to begin across the Washington Cascades
with near 100 percent chances for snow. The snow amounts at
pass level will not be significant, as the NBM mean shows about
2-3 inches at White and Snoqualmie Pass. Next week, another AR
impacts the region as NBMs 25th to 75th members percentile
range of outcomes of roughly 1 to 2 feet of snow at the pass
levels for the 3 day period ending Saturday morning. With little
if any snow (mean is 2 inches) east of Cle Elum into the Yakima
Valley. Similar range of outcomes are showing from the NBM
members for the other pass levels of the Washington and and
Oregon Cascades, as well as the Northern Blue Mountains near
Tollgate. Uncertainty is high as to the overall impacts given
these range of outcomes but it seems reasonable to expects some
headlines going into the midweek period. Russell/71

&&

.AVIATION /06Z TAFS THROUGH 06Z SUNDAY/...
VFR conditions were occurring at all sites. While there are
some passing showers on the radar currently, more -RA is
expected in the morning and during the day on Saturday. With
this rain will come MVFR conditions, and even the possibility of
local IFR by evening and toward the end of the forecast period.
Winds will be light.

&&

.Preliminary Point Temps/PoPs...
PDT  38  46  35  46 /  30  60  70  30
ALW  40  46  37  46 /  50  60  80  50
PSC  36  49  36  50 /  40  30  40  10
YKM  31  46  32  46 /  40  10  20  10
HRI  36  47  36  49 /  30  40  60  20
ELN  30  43  28  42 /  50  10  10  10
RDM  30  44  29  47 /  10  50  40  10
LGD  36  47  36  50 /  30  80  80  60
GCD  35  48  33  50 /  10  60  60  30
DLS  38  47  39  48 /  70  40  50  20

&&

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

&&

$$

UPDATE...71
DISCUSSION...71
AVIATION...77