223
FXUS66 KPQR 301016
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
315 AM 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 BY THE
4TH OF JULY (70-90% CHANCE).
DISCUSSION...TUESDAY THROUGH MONDAY NIGHT
CONDITIONS TODAY WILL BE
VERY SIMILAR TO WHAT WAS OBSERVED YESTERDAY AS MOIST ONSHORE FLOW
CONTINUES, BRINGING PERSISTENT CLOUD COVER AND BELOW AVERAGE HIGH
TEMPERATURES MAINLY IN THE 60S. CONDITIONS WILL BE MAINLY DRY ASIDE
FROM A FEW STRAY SPRINKLES, MAINLY OVER HIGHER TERRAIN. THIS
"WASH-RINSE-REPEAT" WEATHER PATTERN WILL HOLD STEADY ON WEDNESDAY AS
WELL, RESULTING IN ANOTHER MOSTLY CLOUDY DAY WITH HIGHS MAINLY IN THE
60S TO NEAR 70 DEGREES. THERE IS MINIMAL CHANGE TO THE WEATHER
PATTERN FOR THURSDAY TOO, ASIDE FROM TEMPERATURES ALOFT WARMING A FEW
DEGREES. AS A RESULT, TEMPERATURES ON THURSDAY ARE EXPECTED TO BE
SLIGHTLY WARMER WITH HIGHS MOST LIKELY IN THE LOW TO MID 70S FOR MOST
INLAND VALLEY LOCATIONS AND 60S AT THE COAST. THAT BEING SAID, THERE
IS A 5-15% CHANCE INLAND VALLEYS WILL STAY STUCK IN THE 60S FOR HIGHS
ON THURSDAY, WHICH WOULD OCCUR IF SKIES REMAIN MOSTLY CLOUDY THROUGH
THE DAY. REGARDLESS OF THE OUTCOME, TEMPERATURES WILL STILL BE
RUNNING A BIT BELOW AVERAGE FOR EARLY JULY AS AVERAGE HIGH
TEMPERATURES FOR INLAND VALLEYS ARE IN THE UPPER 70S FOR JULY 2.
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
CONTINUES TO SHOW A 70-90% CHANCE FOR HIGHS ABOVE 80 DEGREES BY THE
4TH OF JULY FOR INLAND VALLEYS WHILE THE COAST STAYS IN THE 60S.
PROBABILITIES FOR HIGHS ABOVE 80 DEGREES DECREASE SLIGHTLY TO 60-80%
ON SUNDAY AND MONDAY, HOWEVER HIGHS SOMEWHERE IN THE 80S REMAINS THE
MOST LIKELY OUTCOME. ONE CHANGE FROM YESTERDAY'S NBM GUIDANCE IS A
SLIGHT LOWERING OF PROBABILITIES FOR HIGHS ABOVE 90 DEGREES.
PROBABILITIES FOR HIGHS ABOVE 90 DEGREES THIS WEEKEND HAVE LOWERED TO
1-10%, SUGGESTING ABNORMALLY HOT CONDITIONS AND HEAT-RELATED IMPACTS
ARE UNLIKELY TO OCCUR. -23
AVIATION
CONDITIONS TODAY WILL BE VERY SIMILAR TO WHAT WAS
OBSERVED YESTERDAY, WITH CLOUDY SKIES THIS MORNING AND CEILINGS
HOVERING AROUND 3500-4000 FEET INLAND, LOWERING TO 2500-3000 FEET
TOWARDS 11-14Z TUESDAY. CEILINGS SHOULD RISE BACK ABOVE 4000 FEET
SOMETIME BETWEEN 18-22Z TUESDAY. THE EXCEPTION IS AT KAST, WHERE
CEILINGS ARE EXPECTED TO HOVER NEAR 2000 FT THROUGHOUT THE TAF
PERIOD. WINDS ARE GENERALLY LIGHT, BUT WILL INCREASE OUT OF THE
NORTHWEST LATE TUESDAY AFTERNOON AROUND 5 TO 10 KT.
KPDX AND APPROACHES...CLOUDY SKIES ARE EXPECTED THROUGH MOST OF
THE TAF PERIOD, WITH CEILINGS AROUND 3500-4000 FEET LOWERING TO
2500-3000 FEET BY APPROXIMATELY 14Z TUESDAY. CEILINGS WILL MOST
LIKELY RISE TO AROUND 4000 FT OR HIGHER BY APPROXIMATELY 18-19Z
TUESDAY, HOWEVER THE EXACT TIMING IS UNCERTAIN. BY 21Z TUESDAY,
PROBABILITIES FOR CEILINGS BELOW 3000 FT LOWER TO 15-20% AND THEN
FALL BELOW 10% BEGINNING AT 22Z. -23
MARINE
NORTHWEST WINDS AROUND 10 TO 20 KT WITH STEEP SEAS
NEAR 7 TO 10 FT AT 9 TO 10 SECONDS DRIVEN MAINLY BY A NORTHWEST
SWELL CONTINUE TODAY THROUGH EARLY WEDNESDAY. GIVEN STEEP SEAS
AND WIND GUSTS UPWARDS OF 20 KT, A SMALL CRAFT ADVISORY REMAINS IN
EFFECT FOR BOTH THE INNER AND OUTER WATERS THROUGH LATE WEDNESDAY
MORNING, EXCEPT THROUGH EARLY WEDNESDAY MORNING FOR THE CENTRAL
AND SOUTHERN INNER WATERS. ROUGH BAR CONDITIONS ARE ALSO EXPECTED
WITHIN THE MAIN CHANNEL OF THE COLUMBIA RIVER BAR THROUGH LATE
TUESDAY MORNING WITH STEEP SEAS AROUND 7 TO 9 FT AT 9 TO 10
SECONDS AND NORTHWEST WINDS AROUND 10 TO 15 KT. CONDITIONS OVER
THE BAR WILL BE PARTICULARLY STEEP AND CHOPPY BETWEEN 3-8 AM PDT
TUESDAY DURING A STRONG EBB CURRENT. THEREFORE, A SMALL CRAFT
ADVISORY REMAINS IN EFFECT FOR THE COLUMBIA RIVER BAR THROUGH 11
AM PDT TUESDAY.
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,
ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS WHEN GUSTS UP TO
20-25 KT ARE EXPECTED. -23
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 11 AM PDT THIS MORNING 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
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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