Wilsonville, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

910
FXUS66 KPQR 300505
AFDPQR

Area Forecast Discussion
National Weather Service Portland OR
1005 PM PDT Mon Jun 29 2026

.SYNOPSIS...Cool onshore flow and persistent cloud cover will
maintain below average temperatures over the area through
Thursday with little change in the overall weather pattern.
Conditions will be mainly dry aside from a few stray sprinkles,
mainly over higher terrain. A gradual warming trend develops
Friday into the holiday weekend with inland valleys likely
warming above 80 degrees by the 4th of July (70-90% chance).

&&

.DISCUSSION...Monday afternoon through Sunday night...Visible
satellite imagery Monday afternoon shows mostly cloudy skies
across NW OR and SW WA. Temperature observations at 2 PM are
only in the low to mid 60s across the interior lowlands and 50s
to low 60s elsewhere under the cloud cover. This is due to
longwave situated over the Western US bringing cooler and moist
air from the north into the PacNW. Model ensemble guidance
continues to suggest this pattern will continue through
Thursday, allowing cool onshore flow to persist with extensive
cloud cover each day during the morning and early to mid
afternoon hours. This will keep temperatures cooler than average
for this time of year with high temperatures ranging from the
mid 60s to lower 70s each day, coolest at the coast. The latest
forecast is trending mainly dry each day aside from a few stray
sprinkles from time to time, mainly over higher terrain.

Conditions will begin trending warmer Friday into the upcoming
holiday weekend as weak upper level ridging develops. Although there
is still a large degree of total model spread for temperatures,
confidence has increased highs will warm to at least 80 degrees for
inland valleys by the 4th of July Saturday (70-90% chance per
the latest NBM guidance). Probabilities for highs of 80 degrees
or warmer are similar on July 5th as well. Chances for highs of
90 degrees or warmer are under 10% on Saturday, increasing
Sunday to 10-25%. That being said, chances for highs at or
above 95 degrees are only 0-5%, suggesting the warmest possible
scenario would be somewhere in the lower 90s. In addition,
overnight lows are expected to be in the 50s, which will offer
excellent relief for those without access to air conditioning
regardless of whether or not temperatures end up in the 80s or
lower 90s. -23/03

&&

.AVIATION...Widespread cloud cover continues with the majority of
the airspace fluctuating between VFR and MVFR conditions through
the TAF period. Starting around 08Z Tuesday, coastal locations
will have a 5-15% chance for IFR conditions to develop, with KONP
having a higher chance. Inland locations will generally be VFR
with CIGs between FL030 to FL050, with occasional periods of MVFR
at any given time and location. Around 18Z-20Z Tuesday, conditions
are expected to improve to predominately VFR conditions.
Generally west/northwest winds less than 10 kt.

KPDX AND APPROACHES...Widespread cloud cover is resulting in VFR
conditions between FL030 to FL050, with occasional periods of
MVFR at any given time through the TAF period. Generally
west/northwest winds less than 10 kt. /42

&&

.MARINE...Northwest winds around 10 to 20 kt with steep seas
near 7 to 9 ft at 9 to 10 seconds driven mainly by a northwest
swell continue today through early Wednesday. These northwest
winds will increase significant wave heights towards 8 to 11 ft
Tuesday morning. Seas will be highest over the outer waters,
mainly north of Cape Falcon, with a 10-20% chance significant
wave heights will peak slightly over 11 ft. Winds and seas will
ease significantly Wednesday afternoon and evening, with benign
conditions expected Thursday and Friday.

Given steep seas and wind gusts upwards of 20 kt, a Small Craft
Advisory is in effect for both the inner and outer waters through
Tuesday night. Rough bar conditions are also expected within the
main channel of the Columbia River Bar late Monday morning through
late Tuesday morning with steep seas around 7 to 10 ft at 9
seconds and northwest winds around 10 to 15 kt. There is also a
Small Craft Advisory on Tuesday morning for a strong ebb current
and seas near 10 ft at the Columbia River Bar. ~12/23

&&

.PQR WATCHES/WARNINGS/ADVISORIES...

OR...None.
WA...None.
PZ...Small Craft Advisory until 11 AM PDT Tuesday for PZZ210.

     Small Craft Advisory until 11 AM PDT Wednesday for PZZ251-
     271>273.

     Small Craft Advisory until 2 AM PDT Wednesday for
     PZZ252-253.

&&

$$

www.weather.gov/portland

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