795 
FXUS66 KPDT 190926
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
126 AM PST Wed Nov 19 2025

.DISCUSSION...Skies are clearing across much of the forecast area 
early this morning as a ridge of high pressure accompanied by cold 
and dry air slides into the PacNW. Low clouds are lingering (and 
even building) across some of our elevated valleys in central and 
eastern Oregon, but otherwise much of the Basin and mountain 
foothills are seeing clear skies. Could see patchy fog develop 
across some of our usual fog-prone areas along river valleys, but 
given the lack of a temperature inversion present across obs, 
thinking is that this morning will just be cold, with much of the 
forecast area seeing below-freezing temps. As of this discussion's 
writing, the Freeze Warning in the Columbia River Gorge is flirting 
with verification with temps in the mid to upper 30s, and as long as 
low stratus does not form via light easterly winds, the last of our 
freeze-eligible zones should finally fall. 

Looking ahead, Wednesday will be dry before our forecast area is 
clipped by the next system - a low diving to our south and east 
before settling over southern California. The trajectory of this 
system is not favorable for widespread precip, so as of now, the 
forecast for late Wednesday into Thursday looks to be that of light 
mountain snow generally less than an inch above primarily 4500-5000 
ft, with perhaps a stray shower impacting the Basin (15-30%) via 
wraparound moisture from the low as it digs to our south. But with 
most of this system's moisture landing to our west, impacts are 
overall anticipated to be minimal. 

We enter another relatively benign pattern Friday through Sunday as 
ridging, slightly dirty in nature, prevails over the region. 
Guidance favors persistent shower chances across primarily the WA 
Cascades over the weekend, but QPF is once again minuscule. Ensemble 
guidance starts to diverge Monday onward, but some members do depict 
an upper-level wave moving down from the ridge upon us early Monday 
morning, which would provide for the next-best chance for area-wide 
precip. But beyond that, forecast confidence weakens (30-40%) as 
ensemble solutions diverge in light of a relatively progressive 
synoptic pattern. 74 

&&

.AVIATION...06z TAFs (Previous Discussion)...An area of 
cloudiness extended from east of PSC through PDT and southwest to 
east of BDN and RDM. There were a few embedded -SHRA in the 
clouds. These clouds will continue moving east with clearing 
behind as high pressure moves into the region. VFR conditions and 
light winds are expected through Wednesday.

Clouds will being to increase by the end of the period as the next
system approaches Wednesday night.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  32  47  32 /   0  20  30   0 
ALW  48  35  46  36 /   0  20  40  10 
PSC  49  32  49  30 /   0  10  10   0 
YKM  48  32  50  29 /   0  20  10   0 
HRI  48  34  48  31 /   0  20  20   0 
ELN  45  29  48  29 /   0  20  10  10 
RDM  50  28  47  23 /   0  60  20   0 
LGD  50  34  50  30 /   0  20  50  10 
GCD  53  35  49  29 /   0  30  40   0 
DLS  50  39  52  36 /   0  60  40  10 

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Freeze Warning until 10 AM PST this morning for ORZ041.

WA...Freeze Warning until 10 AM PST this morning for WAZ024.

&&

$$

DISCUSSION...74 
AVIATION...77