Post, Oregon Weather Forecast Discussion

125
FXUS66 KPDT 221713
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
1013 AM PDT Mon Sep 22 2025
.AVIATION...
/18z TAFs/
VFR conditions with mostly clear skies will prevail across the
airspace through at least the next 24 hours as upper-level ridging
builds over the PacNW. Winds will be light through the period,
with diurnal, terrain-influenced changes in direction being the
only minor impacts to otherwise variable conditions. Depending on
the afternoon fire activity over central WA, there is a low
probability for visibility impacts due to smoke during the
overnight and early morning hours, primarily across portions of
southeast WA and northeast OR.
MJ
&&
.PREV DISCUSSION... /issued 430 AM PDT Mon Sep 22 2025/
AVIATION...
Post frontal high pressure will lead to light boundary layer
winds and VFR flight categories for area terminals over the next
18-24 hours. Expect winds to be light and variable (under 12
knots) and terrain driven.
PREV DISCUSSION... /issued 153 AM PDT Mon Sep 22 2025/
DISCUSSION...Clearing has taken place over the forecast area early
this morning after the passage of a cold front. Temperatures have
plummeted as a result, with widespread lows in the 40s and even 30s
across our elevated valleys. Confidence was not high enough in
widespread freezing temperatures for any of our non-mountain zones
eligible for Freeze Warnings, but isolated pockets of freezing
temperatures may occur (confidence 40%) in central Oregon, the Bear
Valley, and the Wallowa Valley.
Ridging will then build behind yesterday`s front for most of the
work week. High temps will slowly build back into the 80s, with
chilly overnights in the 40s expected as clear skies and light winds
enable efficient nighttime cooling. Models generally don`t introduce
PoPs of any kind until Friday, when a weak shortwave to our north
looks to flatten our ridge just a tad, which is then followed by a
weak southwesterly flow pattern heading into next weekend, at least
according to the consensus of ensemble guidance as of now. Precip
looks to be limited to the Washington Cascades however, and looks to
be fairly minimal in the absence of a more defined synoptic feature.
Otherwise, expect pleasant daytime conditions for at least the
duration of the upcoming work week. Evans/74
&&
.PRELIMINARY POINT TEMPS/POPS...
PDT  73  47  82  50 /   0   0   0   0
ALW  74  51  81  56 /   0   0   0   0
PSC  75  44  81  47 /   0   0   0   0
YKM  75  48  80  50 /   0   0   0   0
HRI  75  45  81  48 /   0   0   0   0
ELN  73  43  79  46 /   0   0   0   0
RDM  75  38  87  41 /   0   0   0   0
LGD  73  42  81  47 /   0   0   0   0
GCD  75  45  85  47 /   0   0   0   0
DLS  78  51  84  54 /   0   0   0   0
&&
.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&
$$
DISCUSSION...74
AVIATION...MJ

NWS PDT Office Area Forecast Discussion