Keizer, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

486
FXUS66 KPQR 240537 AAA
AFDPQR

Area Forecast Discussion...UPDATED
National Weather Service Portland OR
937 PM PST Fri Jan 23 2026

Updated aviation discussion.

.SYNOPSIS...Dry weather continues through most of the weekend
as high pressure remains over the region. Gusty winds persist
through the Columbia Gorge. Expect cold overnight lows in the
upper teens to mid 20s through Saturday night/Sunday morning in
the lowlands. Clear skies and light winds away from the Columbia
River Gorge will result in frost formation for the interior
lowland valleys and coast range Valleys. Chances for
precipitation return by the middle of next week, but details on
the exact timing and impacts remain uncertain at this time.

&&

.SHORT TERM...Now through Saturday Night...Fairly benign
weather across the PacNW as high pressure continues to dominate
the Pacific NW and NE Pacific Ocean. Clear skies today will
bring about very cold overnight temperatures for the majority of
the CWA. Expect overnight lows and wind chills (apparent
temperatures) in the 15 to 25 degree fahrenheit range for all
areas west of the Cascade Crests to include the Hood River
Valley (65-95% probability) for at least 4 hours. Therefore,
have issued a Cold Weather Advisory for the Lower Elevations of
Northwest Oregon, and the Lower Elevations of Southwest
Washington. While the Cascade Crests will also be very cold,
they are not expected to fall below Cold Weather Advisory
Criteria tonight. Cold overnight to morning temperatures will
continue Saturday night into Sunday morning and Sunday night
into Monday morning as high pressure persists, though the
potential for Cold Weather Advisory criteria decreases
substantially after Saturday night/Sunday morning.

Transport winds have increased and as a result have helped to
mix the air trapped at or near the surface. Therefore, have
expired the Air Stagnation Advisory. However, transport winds do
decrease towards the latter part of this weekend and into the
start of next week. So, another Air Stagnation Advisory may be
warranted, mainly for the Willamette Valley depending on how
long conditions are expected to persist. /42/19

.LONG TERM...Sunday through Thursday...Models and their
associated ensembles are starting to show a pattern shift next
week as a trough digs across the Pacific. This may weaken the
anchored ridge enough to finally see a substantial change by the
middle/end of the upcoming week. Ensembles agree that a weak
short wave and associated cold front will pass through the
region during the Sunday night through Monday night timeframe.
However, precipitation is negligible (if any) for the area with
at most a few hundredths of an inch. Even if this system brings
little in the form of precipitation, it will still play an
important role in breaking the ridge down and setting the stage
for more beneficial precipitation toward the middle/end of next
week. Ensemble guidance remains in agreement that a moderate,
Pacific low will finally break down the strong ridging over the
region by midweek, though details are still unclear. At this
time, model ensemble guidance is pointing towards a moderate PoP
(35-60% chance) with relatively low/moderate QPF (0.10-0.50
inches total) event. At this point, there are no major impacts
expected with this weather system, and if precipitation does
occur, it would be more beneficial than impactful, especially
after the recent dry spell. /42/19


&&

.AVIATION...Clear skies continue across the region as high
pressure builds overhead. Tonight into Saturday morning,
temperatures drop below freezing for most inland sites with frost
accumulation possible on surfaces where winds are light. We still
need to keep an eye on a chance (25-30%) for fog formation in the
far southern Willamette Valley approaching sunrise which would
impact KEUG - much lower chances for fog elsewhere. However, the
atmosphere is very dry so saturation will be quite difficult.
Otherwise, high confidence VFR conditions prevail the next 24
hours.

KPDX AND APPROACHES...VFR with gusty easterly winds over the next
3-6 hours. Temperatures will drop near freezing with frost
possible in some shaded areas but in general winds will be
elevated enough to keep it at bay. Winds aloft below 5000 ft will
remain at 20-25 kt through 20Z Saturday. -27


&&

.MARINE...
Expect fairly benign conditions, especially by January
standards, to continue across the coastal waters the next several
days. East to northeasterly winds have increased this afternoon as
a thermal trough along the coast expands northward and high
pressure rebuilds inland. Winds generally increase to around 10-15
kt with gusts up to 20 kt, but isolated gusts to 25-30 kt will be
possible extending from the coast range gaps across the coastal
waters. Winds slowly decrease the latter half of the weekend
followed by a switch to southerly winds on Monday as a weak
weather disturbance passes by primarily to our north. Through
early next week wave heights hold between 3-6ft. Our next frontal
system of note likely approaches the waters by the middle of next
week increasing chances for Small Craft Advisory conditions,
particularly on Wednesday. Given the uncertainty in the track and
strength of this disturbance, confidence decreases in the wave
height forecast mid-week onward but the GEFS does indicate a
20-30% chance for wave heights to exceed 15 ft as early as
Wednesday evening. -99/19

&&

.PQR WATCHES/WARNINGS/ADVISORIES...
OR...Cold Weather Advisory until noon PST Saturday for ORZ101>125.
WA...Cold Weather Advisory until noon PST Saturday for WAZ201>210.
PZ...None.
&&

$$

www.weather.gov/portland

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