Pendleton, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

058
FXUS66 KPDT 241106
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
306 AM PST Sat Jan 24 2026

.KEY POINTS...

1. A high pressure ridge will dominate through mid-week bring in
   above average temperatures back

2. Fog/stratus will be the main concern

3. An upper level system mid-week could clear the area of stagnant
conditions temporarily.


.DISCUSSION...Current satellite shows the stratus layer beginning to
erode from north to south with many basin and adjacent valley
locations reporting clear skies. The dry northwest flow aloft will
continue to slowly erode the stratus deck, however, fog will likely
return across many locations early this morning.

Models show the ridge to continue to build in over the region which
will bring back the stratus deck as well as the fog. Raw ensembles
show 10-20% chances of patchy fog returning to much f the area by
morning with areas along the I-84 corridor of the Blues seeing 30-
40% probabilities of seeing 5 mile or less in visibility through the
morning. HREF shows that the stratus deck will again reform,
especially along the foothills of the Blues and through portions of
central and north-central OR again through tomorrow. In other words,
the cold pool will continue to plague the region through at least
mid-week.

Models show that by Wednesday morning an upper level trough will
form off the coast of the PacNW which will bring in slight chances
(15-30%) of light mountain precipitation and assist with pushing the
cold pool out of the region. However, looking at the 700 mb wind
speeds couple with the omega field, confidence that this system will
completely erode the cold pool is low/moderate (30-50% confidence).
This in part due to the models showing the 700 mb winds speeds to be
below 25 kts and the omega field only showing -7 ubar, which implies
that mixing will not be very strong. With that said, we could see
some clearing of the stratus deck across some areas, but it will
likely be short lived as models show yet another high pressure ridge
pushing inland by Friday. 90


&&

.AVIATION...(previous discussion)
Drier air is eroding some of the stratus form north to south
across sections of the Columbia basin of WA, which should lessen
impacts to some of the terminals heading into Saturday. Focus
areas for continues risk of low ceilings or visibility continues
to be BDN and RDM where ceilings can lower into the IFR category
overnight. As stratus begins to erode overnight, radiation fog
development is possible, impacting visibility by around 10-12z.
PSC is already in the drier air and should remain VFR. There is
about a 20 percent chance for quarter mile visibility to develop
at PDT and ALW.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  28  23  29  21 /   0   0   0   0
ALW  30  23  31  24 /   0   0   0   0
PSC  33  25  33  22 /   0   0   0   0
YKM  30  25  30  21 /   0   0   0   0
HRI  32  25  32  22 /   0   0   0   0
ELN  27  23  27  19 /   0   0   0   0
RDM  29  20  31  21 /   0   0   0   0
LGD  30  23  31  24 /   0   0   0   0
GCD  28  21  30  24 /   0   0   0   0
DLS  34  27  34  26 /   0   0   0   0

&&

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

$$

SHORT TERM...90
LONG TERM....90
AVIATION...71