362
FXUS66 KPDT 112230
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
230 PM PST Tue Nov 11 2025

.DISCUSSION...Clear skies with some high cloud bases entering the
southern part of the CWA near Central OR. Most of the fog we
observed from earlier this morning has since been lifted. We will
continue to be under the influence of a ridge over the next day,
that will continue our pattern of dry and light conditions save
for some mountain rain showers over the Cascades. Abundant upper
level moisture coupled with the increases influences of an
incoming trough will bring overcast skies through the night.
Though I`m a little less confident on the fog tomorrow morning
(10-15% chance) given the overcast skies, but none the less I
still put in some areas of patchy due to low level confidence, but
not expecting it to be as widespread as we saw this morning.

As we head into Thursday through Friday, a stationary front will
influence the pattern and increase coverage of precipitation
through the region. Every area by late Thursday evening/early
Friday morning will see 40-60% chances of PoP. This will mostly be
a rain event, but snow showers look to develop in the Cascades and
parts of the Eastern mountains as snow levels drop to 4500 to
5500 feet with accumulation looking to top of at around an inch
(50-70% chance) in the highest crests of the Cascades. Things will
dry out mostly in the Basin by the weekend due to a ridge
developing around the trough, creating a cut off low in southern
California through New Mexico. Although the Basin will dry out
through the weekend, instability from the cut off low will be just
enough to allow mountain snow and rain showers to continue. Any
sort of break from the precipitation will be short lived with
another shortwave forming off the coast by the beginning of the
work week and will continue the wet pattern, along with mountain
snow showers at 5000 to 6000 feet.

&&

.AVIATION...00Z TAFs...Fog lifted from this morning in the
impacted sites. Winds will be generally light and variable as we
still continue receiving the influence of the ridge. Not
expecting fog to be as widespread tomorrow morning as we saw this
morning, but we`ll have a question of how low ceilings will go
through tomorrow morning. Currently have a consensus of MVFR for
areas of the DLS late tomorrow morning as well as some LIFR
conditions for low ceilings in ALW/PDT earlier in the morning.
Will need to monitor if this trend continues as we go through the
period, but this will mostly be a CIG issue over a VIS issue due
to the nature of overcast skies tonight.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  56  41  63 /   0   0  10  60
ALW  42  54  44  62 /  10  10  10  60
PSC  37  54  37  57 /  10  10  10  50
YKM  39  54  39  56 /  10  10  20  70
HRI  40  54  40  58 /   0   0  10  50
ELN  36  51  36  53 /  20  20  30  80
RDM  40  64  44  63 /   0   0  10  50
LGD  44  62  47  63 /   0   0   0  60
GCD  43  66  47  66 /   0   0  10  60
DLS  45  56  45  57 /  10  10  40  90

&&

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

$$

SHORT TERM...95
LONG TERM....95
AVIATION...95