746
FXUS66 KPQR 010555 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
1054 PM PDT TUE JUN 30 2026
..UPDATED AVIATION DISCUSSION
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
SATELLITE IMAGERY AND TERMINAL OBSERVATIONS AS OF
LATE TUESDAY EVENING DEPICT WIDESPREAD LOW-END VFR STRATUS SPREADING
ACROSS NORTHWEST OREGON AND SOUTHWEST WASHINGTON. HIGH CONFIDENCE
FOR LOW-END VFR CIGS ACROSS THE AREA (3-5 KFT) TONIGHT, WITH
INCREASING CHANCES FOR HIGH-END MVFR CIGS (2-3 KFT) AFTER 12Z WED.
GUIDANCE GENERALLY GIVES A 20-40% CHANCE FOR MVFR CIGS FOR
WILLAMETTE VALLEY TERMINALS AT ANY GIVEN HOUR BETWEEN 12-18Z WED,
AND A 40-60% CHANCE FOR COASTAL TERMINALS. BY 17-18Z WED, INCREASED
MIXING WILL IMPROVE CONDITIONS BACK TO VFR WITH CIGS GRADUALLY
RISING THROUGHOUT THE DAY. WINDS LIGHT AND UNDER 5 KT TONIGHT,
TURNING NORTHWESTERLY AND INCREASING TO 8-11 KT AFTER 21Z WED-00Z
THU.
KPDX AND APPROACHES...LOW-END VFR CIGS THROUGH EARLY WEDNESDAY
MORNING WITH A 30-40% CHANCE FOR HIGH-END MVFR CIGS (2-3 KFT) AT ANY
GIVEN HOUR BETWEEN 12-18Z WED. VARIABLE WINDS UNDER 5 KT THROUGH THE
MORNING. WINDS BECOME NORTHWESTERLY AND INCREASE TO 6-10 KT AFTER
21Z WED AND LAST THROUGH THE EVENING. -10
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.
WWW.WEATHER.GOV/PORTLAND
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