593
FXUS66 KPQR 290951
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
250 AM PDT MON JUN 29 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...NOW THROUGH SUNDAY NIGHT
VERY LITTLE CHANGE IS
EXPECTED TO THE OVERALL WEATHER PATTERN MONDAY THROUGH THURSDAY.
MODEL ENSEMBLE GUIDANCE CONTINUES TO SUGGEST COOL ONSHORE FLOW WILL
PERSIST, WITH EXTENSIVE CLOUD COVER EACH DAY DURING THE MORNING AND
EARLY TO MID AFTERNOON HOURS. THIS WILL KEEP TEMPERATURES COOLER THAN
AVERAGE FOR THIS TIME OF YEAR WITH HIGH TEMPERATURES RANGING FROM THE
MID 60S TO LOWER 70S EACH DAY, COOLEST AT THE COAST. THE LATEST
FORECAST IS TRENDING MAINLY DRY EACH DAY ASIDE FROM A FEW STRAY
SPRINKLES FROM TIME TO TIME, MAINLY OVER HIGHER TERRAIN.
CONDITIONS WILL BEGIN TRENDING WARMER FRIDAY INTO THE UPCOMING
HOLIDAY WEEKEND AS WEAK UPPER LEVEL RIDGING DEVELOPS. ALTHOUGH THERE
IS STILL A LARGE DEGREE OF TOTAL MODEL SPREAD FOR TEMPERATURES,
CONFIDENCE HAS INCREASED HIGHS WILL WARM TO AT LEAST 80 DEGREES FOR
INLAND VALLEYS BY THE 4TH OF JULY (70-90% CHANCE PER THE LATEST NBM
GUIDANCE). PROBABILITIES FOR HIGHS OF 80 DEGREES OR WARMER ARE
SIMILAR ON JULY 5TH AS WELL. CHANCES FOR HIGHS OF 90 DEGREES OR
WARMER OVER THE WEEKEND ARE GENERALLY UNDER 10%, EXCEPT ON SUNDAY
WHEN CHANCES INCREASE TO 10-20%. THAT BEING SAID, CHANCES FOR HIGHS
AT OR ABOVE 95 DEGREES ARE ONLY 0-5%, SUGGESTING THE WARMEST POSSIBLE
SCENARIO WOULD BE SOMEWHERE IN THE LOWER 90S. IN ADDITION, OVERNIGHT
LOWS ARE EXPECTED TO BE IN THE 50S, WHICH WILL OFFER EXCELLENT RELIEF
FOR THOSE WITHOUT ACCESS TO AIR CONDITIONING REGARDLESS OF WHETHER OR
NOT WE WIND UP IN THE 80S OR LOWER 90S. -23
AVIATION
SATELLITE AND SURFACE WEATHER OBSERVATIONS FROM 09Z
MONDAY DEPICTED WIDESPREAD CLOUD COVER ACROSS NORTHWEST OREGON
AND SOUTHWEST WASHINGTON. CEILINGS ARE GENERALLY RANGING BETWEEN
2000-4000 FEET, RESULTING IN A MIX OF MVFR TO LOW-END VFR FLIGHT
CONDITIONS. MVFR CEILINGS ARE EXPECTED TO BECOME MORE PREDOMINANT
BY 12Z MONDAY AND THEN LINGER THROUGH MONDAY MORNING.
AFTER 19Z-21Z MONDAY, CONDITIONS INLAND LOOK TO IMPROVE BACK
TOWARDS VFR WITH CEILINGS LIKELY RISING ABOVE 3500-4000 FEET.
MEANWHILE, THE COAST WILL LIKELY REMAIN MVFR THROUGH THE TAF
PERIODS (70-90% CHANCE).
KPDX AND APPROACHES...CEILINGS ARE EXPECTED TO HOVER BETWEEN
2500-3000 FEET MONDAY MORNING BEFORE RISING ABOVE 4000 FEET MONDAY
AFTERNOON. THERE IS AN 80-90% CHANCE FOR CEILINGS AT OR BELOW
3000 FEET BETWEEN 12-17Z MONDAY, LOWERING TO A 50-60% CHANCE
BETWEEN 18-20Z MONDAY. AFTER 20Z, THERE IS AN 80-90% CHANCE
CEILINGS WILL LIFT ABOVE 4000 FEET. NORTHWEST WINDS AROUND 5-10 KT
ARE EXPECTED BETWEEN 23Z MONDAY AND 06Z TUESDAY, WITH MAX WIND
GUSTS UP TO AROUND 15 KT LIKELY (75% CHANCE). -23
MARINE
NORTHWEST WINDS AROUND 10 TO 20 KT WITH STEEP SEAS
NEAR 7 TO 9 FT AT 9 SECONDS DRIVEN MAINLY BY A FRESH NORTHWEST
SWELL WILL CONTINUE ON MONDAY. ALTHOUGH WEAK HIGH PRESSURE WILL BE
BUILDING OVER THE WATERS, NORTHWEST WINDS WILL CONTINUE TO BUILD
THE ONGOING NORTHWEST SWELL WITH SIGNIFICANT WAVE HEIGHTS
INCREASING SLIGHTLY TO 8 TO 11 FT MONDAY AFTERNOON. SEAS WILL BE
HIGHEST OVER THE OUTER WATERS. THERE IS A 30-50% CHANCE SIGNIFICANT
WAVE HEIGHTS WILL PEAK SLIGHTLY OVER 11 FT BEYOND 40 NM OFFSHORE
ON MONDAY, MAINLY TO THE NORTH OF THE COLUMBIA RIVER BAR. NORTHWEST
WINDS AND A FRESH NORTHWEST SWELL THEN CONTINUES TUESDAY THROUGH
WEDNESDAY MORNING, MAINTAINING STEEP SEAS AND HAZARDOUS CONDITIONS
FOR SMALL CRAFT. WINDS AND SEAS WILL EASE SIGNIFICANTLY WEDNESDAY
AFTERNOON AND EVENING, WITH BENIGN CONDITIONS EXPECTED THURSDAY
AND FRIDAY.
GIVEN STEEP SEAS AND WIND GUSTS UPWARDS OF 20 KT, A SMALL CRAFT
ADVISORY IS IN EFFECT FOR BOTH THE INNER AND OUTER WATERS THROUGH
TUESDAY EVENING. ROUGH BAR CONDITIONS ARE ALSO EXPECTED WITHIN THE
MAIN CHANNEL OF THE COLUMBIA RIVER BAR LATE MONDAY MORNING
THROUGH LATE TUESDAY MORNING WITH STEEP SEAS AROUND 7 TO 10 FT AT
9 SECONDS WITH NORTHWEST WINDS AROUND 10 TO 20 KT. A STRONG EBB
CURRENT WILL OCCUR TUESDAY MORNING, WHICH IS WHEN SEAS ARE
EXPECTED TO PEAK NEAR 10 FT. AS SUCH, A SMALL CRAFT ADVISORY HAS
BEEN ISSUED FOR THE COLUMBIA RIVER BAR. -23
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 11 AM THIS MORNING TO 11 AM PDT
TUESDAY FOR PZZ210.
SMALL CRAFT ADVISORY UNTIL 11 PM PDT TUESDAY FOR PZZ251>253-
271>273.
WWW.WEATHER.GOV/PORTLAND
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