Beachie Trail Oregon Weather Forecast Discussion

759
FXUS66 KPQR 140002 AAA
AFDPQR
Area Forecast Discussion...UPDATED
National Weather Service Portland OR
501 PM PDT Mon Oct 13 2025
Updated PQR WATCHES/WARNINGS/ADVISORIES.
.SYNOPSIS...A low pressure system has dropped south of the area,
allowing for mostly sunny skies and increasing offshore flow this
afternoon. A broad upper level ridge slides over the region Tuesday
through the end of the week, supporting mostly dry conditions and
seasonable temperatures through Saturday. A weak front brings
increasing clouds and a chance for very light rain late Thursday
into Friday. The next Pacific frontal system is very likely to push
across the area later this weekend, with potential for more
substantial rainfall amounts.
&&
.DISCUSSION...Tonight through Sunday...Relatively quiet weather
expected these next few days, with mostly sunny skies and seasonable
fall-like temperatures. An upper level trough over much of the
western US continues to dig south with an upper level low over
southern Oregon dropping into central California on Tuesday. This
will bring offshore flow with east to northeast winds across the
area through Tuesday night. East winds strongest out of the Columbia
River Gorge through this evening with gusts up to 30 mph possible.
Clear skies tonight will allow for optimal conditions for
radiational cooling, but only in areas sheltered from the east
winds. Therefore, Frost Advisories have been issued for temperatures
falling below 38 degrees overnight across much of the southern
Willamette Valley, as well as parts of the Tualatin Valley, and
northern Clark County in Washington. Not all locations within the
advisory will see temperatures that cold, but still a good idea to
cover or move sensitive plants indoor. A Freeze Warning remains in
effect for the Upper Hood River Valley where overnight temperatures
are likely to drop to around 28-32 degrees. Elsewhere, east winds
will maintain slightly warmer temperatures overnight.
By early Wednesday, the upper low shifts east across the Great
Basin, allowing for more north to northwesterly flow across the
region. Weak upper level ridging begins to nudge over the Pacific NW
by the middle of the week. This ridge is expected to flatten out
through the end of the week, and will likely allow a weak front to
push across the area late Thursday into Friday. Not much rain is
expected with this front as there is generally less than a 20%
chance of a tenth inch of precipitation. Mainly, increasing clouds
will bring slightly cooler afternoon temperatures on Thursday.
Generally expect highs this week to remain fairly seasonable, with
temperatures ranging from the upper 50s to mid-60s.
There is relatively good model and ensemble agreement for a frontal
system to push across the region sometime later Saturday or Sunday,
with a decent amount of rainfall possible. Probabilities for 1.0
inch of rainfall through Sunday night are 50-70% along the coast and
around 20-30% inland.
&&
.AVIATION...VFR conditions across the region are expected to
continue through the overnight. Winds remain from the east as low
pressure slips southward into northern California. Sustained winds
10-15 kt with gusts 20-25 kt are expected to continue into tonight
before the pressure gradient weakens over the area. Winds
decrease to around 10 kt late tonight before increasing from the
northeast again Tuesday morning.
KPDX AND APPROACHES...VFR conditions expected through the TAF
period. Easterly winds 10-15 kt with gust 20-25 kt expected
through the evening. Winds die down late tonight to around 10 kt
from the northeast. /19
&&
.MARINE...Low pressure continues to drop southward, supporting
northeast flow through Tuesday. Winds 15-20 kt with gusts to 25 kt
will slowly weaken overnight as the pressure gradient loosens.
Winds over the northern waters are expected to drop below Small
Craft criteria this evening and the central and southern inner
waters later tonight. The central and southern outer waters hang
on to gusty winds through Tuesday afternoon. Winds turn
northwesterly on Wednesday to around 10 kt.
Seas 9-10 feet at 10 seconds will continue to drop overnight to
around 7-8 feet at 9 seconds. Seas continue to drop to 4-5 feet at
8 seconds on Wednesday, persisting through Friday.
While the weather pattern remains a bit uncertain for this
upcoming weekend, model guidance for wave height has improved. On
Saturday, there is moderate to high confidence for seas around 8
to 10 ft. The latter half of the weekend into early next week
shows a large range for potential wave heights. The high end
scenario (10% chance) pushes waves to 18-20 feet while the low
end scenario (10% chance) is closer to 10-12 feet. /19
&&
.PQR WATCHES/WARNINGS/ADVISORIES...
OR...Frost Advisory from midnight tonight to 9 AM PDT Tuesday for
     ORZ104-108-109-116>118-124-125.
Freeze Warning from midnight tonight to 9 AM PDT Tuesday for
     ORZ121.
WA...Frost Advisory from midnight tonight to 9 AM PDT Tuesday for
     WAZ204>206-208.
PZ...Small Craft Advisory until 11 PM PDT this evening for
     PZZ252-253.
Small Craft Advisory until 5 PM PDT Tuesday for PZZ272-273.
&&
$$
www.weather.gov/portland
Interact with us via social media:
www.facebook.com/NWSPortland
x.com/NWSPortland

NWS PQR Office Area Forecast Discussion