712
FXUS66 KPQR 302240
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
340 PM PDT TUE JUN 30 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 FOR THE 4TH OF JULY INTO EARLY NEXT
WEEK (60-90% CHANCE).
DISCUSSION...TUESDAY AFTERNOON THROUGH MONDAY NIGHT
VERY
LITTLE CHANGE IN WEATHER CONDITIONS IS EXPECTED THROUGH THURSDAY
AS UPPER LEVEL TROUGHING REMAINS IN PLACE OVER THE WESTERN US.
SATELLITE IMAGERY SHOWS CLOUD COVER BLANKETING NW OR AND SW WA
WITH LITTLE CLEARING EXPECTED DUE TO INCREASED ONSHORE FLOW.
HIGH TEMPERATURES EACH DAY ARE FORECAST TO BE IN THE MID TO
UPPER 60S FOR INLAND VALLEYS WITH 50S TO LOW 60S ELSEWHERE.
THURSDAY WILL LIKELY BE SLIGHTLY WARMER WITH INLAND VALLEYS
INTO THE LOW TO MID 70S AS TEMPERATURES ALOFT WARM A FEW
DEGREES, THOUGH IF CLOUD COVER REMAINS FAIRLY DENSE, OBSERVED
HIGH TEMPERATURES COULD END UP LOWER THAN THIS. A FEW LIGHT
SHOWERS OR DRIZZLE ARE POSSIBLE EACH DAY, AS WELL, MAINLY OVER
THE HIGHER TERRAIN.
CONFIDENCE INCREASES FOR A MORE NOTICEABLE WARM-UP FRIDAY INTO THE
UPCOMING HOLIDAY WEEKEND DUE TO THE ARRIVAL OF WEAK UPPER LEVEL
RIDGING AND LESS CLOUD COVER DURING PEAK HEATING HOURS. THE NBM
SHOWS A 60-90% CHANCE FOR HIGHS ABOVE 80 DEGREES BY THE 4TH OF
JULY THROUGH MONDAY FOR INLAND VALLEYS SOUTH OF VANCOUVER WHILE
THE COAST STAYS IN THE 60S. PROBABILITIES FOR HIGHS ABOVE 90
DEGREES THIS WEEKEND REMAIN AT 1-10%, AND THE 90TH PERCENTILE
INDICATES THE HIGH END SCENARIO FOR HIGH TEMPERATURES IS IN THE
UPPER 80S FOR THE WEEKEND. THIS INDICATES ABNORMALLY HOT
CONDITIONS AND HEAT- RELATED IMPACTS ARE UNLIKELY TO OCCUR FOR
THE HOLIDAY WEEKEND. -03/23
AVIATION
CONTINUED OVERCAST SKIES TODAY WILL PERSIST THROUGH
THE EVENING AS ONSHORE FLOW REMAINS DOMINATE. GENERALLY VFR THIS
AFTERNOON, THOUGH WITH ONSHORE FLOW, WILL SEE ADDITIONAL MOISTURE
OVERNIGHT. HIGH RESOLUTION MODELS CONTINUE TO SUGGEST A GREATER
THAN 70% PROBABILITY OF MVFR CIGS ALONG THE COAST AS EARLY AS 00Z
WED WITH HIGHER PROBABILITIES AFTER 09Z WED. WINDS WILL CONTINUE
TO BE FROM THE NORTH-NORTHWEST THEN BECOME VARIABLE OVERNIGHT.
THIS WIND DIRECTION WILL HELP WITH CLOUDS BACK BUILDING OFF OF THE
CASCADE FOOTHILLS, CAUSING SKIES POTENTIALLY LOWER WITHIN THE
INTERIOR VALLEYS. CONFIDENCE IS LOW IN REGARDS TO WHETHER
CONDITIONS WILL BE MVFR OR VFR. RETURN TO VFR CONDITIONS AFTER
18Z WED INLAND.
KPDX AND APPROACHES...OVERCAST SKIES WITH CIGS AROUND 4000-5500 FT
MSL. NORTHWEST WINDS. 60% CHANCE OF MVFR CIGS AS EARLY AS 10Z WED,
DISSIPATING BY 20Z WED. -27
MARINE
NORTHWESTERLY SWELL THROUGH THE NEXT SEVERAL DAYS WITH
STEEP SEAS OF 8 TO 10 FT AT 9 SECONDS THROUGH EARLY WEDNESDAY
MORNING. POSSIBLE ISOLATED SEAS TO 10 FT IN THE OUTER WATERS OF
PZZ271-272 PAST THE SMALL CRAFT ADVISORY, HOWEVER THEY ARE NOT
EXPECTED TO BE WIDESPREAD OR LONG LASTING. WINDS AND SEAS WILL
EASE SIGNIFICANTLY WEDNESDAY AFTERNOON AND EVENING, WITH BENIGN
CONDITIONS EXPECTED THURSDAY AND FRIDAY. SEAS ARE EXPECTED TO
RANGE BETWEEN 4 AND 6 FT WEDNESDAY NIGHT THROUGH THE UPCOMING
WEEKEND, WITH NORTH TO NORTHWEST WINDS CONTINUING. NORTHERLY WINDS
DO INCREASE IN STRENGTH OVER THE WEEKEND AS A TYPICAL SUMMERTIME
RIDGE SETS IN. WE WILL SEE THERMALLY DRIVE WINDS IN THE AFTERNOON
AND EVENING HOURS WHEN GUSTS UP TO 20-25 KT ARE EXPECTED.
-27/23
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 11 AM PDT WEDNESDAY FOR PZZ251-
271>273.
SMALL CRAFT ADVISORY UNTIL 2 AM PDT WEDNESDAY FOR PZZ252-253.
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