Lebanon, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

425
FXUS66 KPQR 241701 AAA
AFDPQR

Area Forecast Discussion...UPDATED
National Weather Service Portland OR
1000 AM PDT Tue Jun 24 2025

Updated Aviation Discussion...

.SYNOPSIS...Above normal temperatures continue through today,
with highs in the mid 80s across the interior valleys this
afternoon. Continued onshore flow brings milder and cloudier
weather Wednesday through Friday, with chances for light rain
along the coast and north of Salem Wednesday into Thursday.
Another stretch of warmer weather appears likely this weekend
into early next week.

&&

.DISCUSSION...Little change in the pattern this morning as broad
onshore flow in the wake of a passing shortwave trough maintains
benign weather conditions across the Pacific Northwest.
Satellite imagery shows marine stratus along the coast with
mostly clear skies inland aside from a few passing high clouds.
Temperatures may run a a degree or two warmer across the the
interior lowlands today as 850 temps remain in the 12-13C range,
with highs in the mid 80s in most valley locations. Marine
influences will maintain highs in the 60s along the coast today
and for much of the coming week as onshore flow persists across
the region.

Expect cloudier skies and milder temperatures Wednesday through
Friday as the region begins to feel the influence of large
scale troughing spanning from the Gulf of Alaska into western
Canada. This will result in inland highs closer to the mid 70s
each day through the end of the work week. Meanwhile, a series
of weak fronts will bring chances for light rain to the area
Wednesday and Thursday. The first of these fronts will approach
the coast late tonight into Wednesday. Expect inland locations
to remain dry through Wednesday as any rain associated with this
feature remains confined to the coast. Model QPF amounts remain
minimal, with most coastal locations expected to pick up no more
than a few hundredths of an inch at best. The second weak front
will cross the area Wednesday night into Thursday, bringing a
better chance for light rain to southwest Washington and at
least northern parts of the Willamette Valley. That said, still
only expect a trace to a few hundredths in these locations as
models keep the chance to receive a tenth of an inch below 10%
inland and only around 10-15% along the coast through Thursday
evening. Areas from Salem south look more likely than not to
remain completely dry through Thursday. Then expect dry
conditions area wide on Friday in the wake of the second front.
Onshore flow will maintain breezy conditions through the
Columbia River Gorge through the period, with west winds
gusting as high as 25-30 mph in the central Gorge each
afternoon.

Medium range models and their ensembles continue to depict a
warming trend this weekend into early next week as upper level
ridging develops over the western CONUS. Forecast highs jump
back up into the mid to upper 80s in the inland valleys by
Sunday, with the NBM showing a 10-30% chance to reach 90 degrees
in the Willamette Valley on Sunday and a 30-40% chance on
Monday. /CB

&&

.AVIATION...Currently as of 9 AM, VFR conditions inland and
IFR/LIFR stratus along the coast. Expect these deteriorated
conditions to continue through the TAF period, potentially
improving to MVFR between 19Z Tuesday and 02Z Wednesday (greater
likelihood for KAST). Probabilistically, the coast have a 40-60%
chance of IFR conditions through the TAF period. Winds generally
westerly to northwesterly around 10 kt or less. Inland will stay
VFR through the period.

PDX AND APPROACHES...VFR with high clouds and northwesterly winds
around 5-7 kt. There is a 10-20% chance of MVFR conditions after
09Z Wednesday. ~Hall

&&

.MARINE...High pressure will maintain northerly to northwesterly
winds across the waters today. Wednesday to Friday, a few weak
fronts will move through and turn winds more westerly to
southwesterly. Minimal impacts are expected as sustained winds
are forecast between 5-15 kt through the rest of the week. Expect
wave heights of 4-5 ft around 9-11 seconds through the end of the
week with a westerly swell. High pressure strengthens late this
weekend, returning breezy northerly winds. Guidance suggests a
60-80% chance of northerly wind gusts reaching Small Craft
Advisory levels (>21 kt) on Sunday.     -Alviz

&&

.PQR WATCHES/WARNINGS/ADVISORIES...

OR...None.
WA...None.
PZ...None.

&&

$$

www.weather.gov/portland

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