512
FXUS66 KPQR 262235
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
335 PM PDT SUN JUL 26 2026
SYNOPSIS
PERSISTENT ONSHORE FLOW WILL BRING NEAR-AVERAGE
TEMPERATURES WITH VARYING DEGREES OF MORNING CLOUDS AND
AFTERNOON SUNSHINE FOR MUCH OF THE NEXT WEEK. A SERIES OF WEAK
FRONTS WILL BRING NOTABLE CHANCES FOR LIGHT RAIN AND DRIZZLE TO
PORTIONS OF THE NORTH OREGON COAST TODAY AND TUESDAY.
DISCUSSION...NOW THROUGH FRIDAY
THE LATEST SATELLITE AND
RADAR IMAGERY DEPICTS CLOUD COVER ALONG THE COAST AND COAST
RANGE, EXTENDING WESTWARD OUT OVER THE PACIFIC. CONDITIONS ARE
MOSTLY CLEAR EAST OF THE COAST RANGE WITH A FEW FAIR WEATHER
CUMULUS DEVELOPING. SOUTHWEST FLOW IN THE MID LEVELS IS EXPECTED
TO PERSIST AS AN UPPER LEVEL TROUGH SITS OVER THE FAR NORTHEAST
PACIFIC. THIS IS SUPPORTING A WEAK COLD FRONT THAT IS MOVING
OVER THE AREA AND BRINGING LIGHT RAIN AND DRIZZLE TO THE COAST
NORTH OF TILLAMOOK AND INTO PACIFIC COUNTY IN WASHINGTON.
CONDITIONS DRY OUT THIS EVENING AND OVERNIGHT LOWS DROP INTO THE
50S FOR MOST LOCATIONS.
MARINE STRATUS IS EXPECTED TO DEVELOP OVERNIGHT, MAINLY
IMPACTING COASTAL LOCATIONS BUT COULD SEE SOME LOW CLOUDS IN THE
PORTLAND METRO AND SOUTHERN WILLAMETTE VALLEY TO START THE DAY.
DRY AND SEASONABLE CONDITIONS EXPECTED ON MONDAY AS UPPER LEVEL
HEIGHTS INCREASE SLIGHTLY, SUPPORTING TEMPERATURES IN THE LOW
80S FOR INTERIOR LOWLANDS AND 60S ALONG THE COAST. BY TUESDAY,
ANOTHER SHORTWAVE WILL PUSH THE WEAK BOUNDARY BACK TOWARD THE
COAST, YIELDING LIGHT RAIN CHANCES ON THE COAST AND WITHIN
COASTAL TERRAIN NORTH OF TILLAMOOK, WITH THE HIGHEST LIKELIHOOD
AGAIN IN PACIFIC COUNTY, WA. REINVIGORATED MARINE CLOUD COVER
ASSOCIATED WITH THE BOUNDARY WILL ALSO SEE TEMPERATURES COOL A
FEW DEGREES AGAIN ON TUESDAY, BEFORE HEIGHTS AGAIN REBUILD
ALOFT, FAVORING A SLOW WARMING TREND THROUGH THE REMAINDER OF
THE WORKWEEK. ENSEMBLE MEMBERS CONTINUE TO HIGHLIGHT ANOTHER
CHANCE FOR A SHORTWAVE AND WEAK SURFACE FRONT TO SUPPORT COOLER
TEMPERATURES AND LIGHT RAIN CHANCES ALONG THE NORTH OR/SOUTHERN
WA COAST LATE IN THE WEEK, BUT UNCERTAINTY IN THE TIMING AND
PLACEMENT OF THIS FEATURE REMAINS HIGH AT THIS LEAD TIME. -19/36
AVIATION...THROUGH 00Z TUESDAY
SOUTHWEST FLOW ALOFT
CONTINUES THROUGH THE TAF PERIOD. MAINLY VFR CONDITIONS ACROSS
THE AIRSPACE WITH CLEAR CONDITIONS EAST OF THE COAST RANGE AND
BKN MIDLEVEL CLOUD COVER ALONG THE COAST. THERE'S HIGHER
CONFIDENCE IN RESTRICTED CIG RETURNING BY 03-06Z MON. FOR INLAND
TERMINALS, THERE'S A 25-50% CHANCE OF MVFR CIGS RETURNING TO
THE SOUTHERN WILLAMETTE VALLEY, INCLUDING KEUG, AFTER 10Z MON.
ELSEWHERE, A 20-30% CHANCE, MAINLY AROUND 12-16Z MON.
SOUTHWEST WINDS 5-10 KT WILL BECOME LIGHT AND VARIABLE LATE THIS
EVENING. COULD SEE SOME ISOLATED GUSTS TO 20 KT ALONG THE NORTH
OR AND SOUTH WA COAST THROUGH THE AFTERNOON.
KPDX AND APPROACHES...MAINLY VFR CONDITIONS EXPECTED. SOUTHWEST
WINDS AROUND 4-7 KT BECOME LIGHT OVERNIGHT. ADDITIONAL 25-35%
CHANCES FOR MVFR CIGS AFTER 08-10Z MON AS STRATUS REDEVELOPS.
-19/03
MARINE
A WEAK FRONT CONTINUES TO MOVE EAST, BRINGING LIGHT
SHOWERS TO THE WATERS OFF THE SOUTH WA AND NORTH OR COASTS
THROUGH THE EVENING. SOUTHWEST WINDS AROUND 10 KT WITH GUSTS TO
15 KT. SEAS REMAIN IN THE 4-6 FOOT RANGE AT 9-10 SECONDS THROUGH
THE MIDDLE OF THE WEEK. WINDS WILL SHIFT TO A MORE SEASONABLE
NORTHERLY PATTERN BEHIND ANOTHER PASSING FRONTAL BOUNDARY ON
TUESDAY. STRENGTHENING NORTHERLY FLOW WILL SEE INCREASING
CHANCES (30-50%) FOR PEAK DIURNAL WIND GUSTS TO REACH 20-25 KT
WEDNESDAY AND THURSDAY AFTERNOONS, ESPECIALLY WITHIN 10 NM OF
THE COAST. SEAS OTHERWISE CONTINUE AT 4-6 FT THROUGH THE
REMAINDER OF THE WEEK. -19/36
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
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X.COM/NWSPORTLAND
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