Camas, Washington Weather Forecast Discussion

698
FXUS66 KPQR 180445 AAA
AFDPQR
Area Forecast Discussion...UPDATED
National Weather Service Portland OR
945 PM PDT Wed Sep 17 2025
Updated marine and aviation discussions. Updated PQR
WATCHES/WARNINGS/ADVISORIES.
.SYNOPSIS...Onshore flow and seasonable temperatures are
expected through Saturday. A larger trough digging southeast
from the Gulf of Alaska this weekend will bring a more
noticeable cool- down and higher rain chances, especially for
the coast and southwest Washington Saturday night through
Sunday.
&&
.SHORT TERM...Now through Saturday...Seasonable temperatures and
tranquil conditions are expected through Saturday. A weak cold
front passing through the area brought little in the form of
precipitation, a few light sprinkles along the coast where
clouds haven`t dissipated are possible. Onshore flow behind the
front is expected to persist through the remainder of the work
week as high pressure offshore builds towards the coast. Highs
on Thursday are expected to be tad cooler, topping out in the
mid to upper 70s inland and low to mid 60s along the coast and
higher terrain. Friday and Saturday will be slightly warmer,
closer to the 80 mark as a weak upper level short wave ridge
passes overhead. -Batz
.LONG TERM...Saturday night through Tuesday night...Dry
conditions will come to an end Saturday night as a strong short
waver trough drops southeast along the British Columbia coast.
A cold front will approach the WA and OR coasts Saturday night
into Sunday. Probabilities for measurable rain will range from
20-60% for most of northwest Oregon, with lower chances (as low
as 15%) in the southern Willamette Valley and into the Lane/Linn
County Cascades and foothills. Higher chances of 50-80% are
expected north and west of a line from the Willapa Hills down to
Tillamook, including the southwest Washington coast and around
Astoria. Temperatures trend cooler for Sunday, generally into
the low 70s inland and 60s along the coast as cloud cover
increases.
Looking into early next week, highs remain seasonable in the
mid to upper 70s inland, with continued cool conditions along
the coast. Tuesday into Wednesday, a low pressure system off the
coast of northern California rides up a trough over the
northeast Pacific and into Oregon. Guidance currently suggests
widespread 20-30% probabilities for precipitation, though
details such as timing remains uncertain. -Batz/Hall
&&
.AVIATION...Skies remain mostly clear across the area Wednesday
evening, with VFR flight conditions at all terminals. While some
low cloud cover remains in place over the coastal mountains, most
of these clouds have cleared out. That said, a broken marine
stratus deck may redevelop at the coast towards 12-15z Thursday
(50-60% chance) before scattering back out between 18-21z. If
marine stratus does redevelop cigs will most likely range between
500-1500 ft, lowest at KONP. Overall confidence for forecast cigs
at KAST and KONP is low. Confidence is higher at KTTD, where there
is a 70-80% chance for cigs around 1000-1500 ft by 12-15z
Thursday as low clouds backbuild from the adjacent Cascade
foothills. KUAO, KHIO, KSLE, and KEUG will likely stay clear. KPDX
has a 30-40% chance for MVFR cigs by 12z Thursday. Any low clouds
that do develop tonight should scatter out around 18z Thursday.
KPDX AND APPROACHES...VFR with clear skies this evening with
northwest winds around 7-8 kt. There is a 30-40% chance for MVFR
cigs beginning around 12z Thursday as morning stratus in the far
eastern metro around KTTD attempts to backbuild westward towards
the KPDX terminal. Since current probabilities favor this stratus
deck staying east of the KPDX terminal, have decided not to
include a broken or overcast MVFR stratus deck in the TAF. Even if
this stratus deck does make it far enough west to reach the
terminal, it would likely scatter out by 18z. -TK
&&
.MARINE...Small Craft Advisories remain in effect across the
waters through Thursday evening for northerly winds 15-20 kt with
gusts up to 25 kt. Buoy observations are matching forecast winds
well, so no changes were needed to the wind forecast with this
evening`s update. However, have decided to extend the Small Craft
Advisory for the Columbia River Bar through 11 PM Thursday,
except from 5am-11am Thursday morning when wind gusts will briefly
fall below 20 kt over the bar. Seas are also expected to build to
around 8 to 10 ft by sunrise Thursday, with a dominant wave period
of 10-11 seconds.
High pressure shifts south and eases on Friday, weakening
northerly winds across the waters. A frontal system arrives this
weekend from the north, returning southerly winds. No substantial
impacts expected for now, with guidance suggesting a 15-30% chance
for southerly wind gusts of 21 kt or greater (small craft advisory
conditions). -TK/Alviz
&&
.PQR WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Thursday for PZZ210.
Small Craft Advisory from 11 AM to 11 PM PDT Thursday for
     PZZ210.
Small Craft Advisory until 11 PM PDT Thursday for PZZ251>253-
     271>273.
&&
$$
www.weather.gov/portland
Interact with us via social media:
www.facebook.com/NWSPortland
x.com/NWSPortland

NWS PQR Office Area Forecast Discussion