491
FXUS66 KPQR 242354
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
445 PM PDT FRI JUL 24 2026
SYNOPSIS
ONSHORE FLOW WILL BRING NEAR AVERAGE TEMPERATURES
WITH PERIODS OF MORNING CLOUDS AND AFTERNOON SUNSHINE FOR MUCH OF
THE NEXT WEEK. A WEAK FRONT WILL BRING LIGHT RAIN TO PORTIONS OF THE
COAST TONIGHT INTO SATURDAY WITH ANOTHER WEAK FRONT APPROACHING THE
REGION ON TUESDAY BRINGING WITH IT ANOTHER CHANCE FOR SOME LIGHT
RAIN.
DISCUSSION...NOW THROUGH THURSDAY
A CLOSED UPPER LEVEL LOW
OFF THE COAST WILL OPEN INTO ANOTHER TROUGH THAT WILL DROP
SOUTHWARD FROM THE GULF OF ALASKA. THE AXIS OF AN UPPER LEVEL
RIDGE OVER THE GREAT BASIN WILL SHIFT EASTWARD OVER THE ROCKIES
AND PLAINS. THIS WILL ALLOW ONSHORE FLOW TO STRENGTHEN, BRINGING
A MORE NOTICEABLE COOLING TREND THIS WEEKEND, ALONG WITH A
RETURN TO MORE MARINE INFLUENCE AND NIGHT/MORNING CLOUD COVER.
TEMPERATURES TREND SLIGHTLY BELOW NORMAL ON SATURDAY AND CLOSER
TO NORMAL ON SUNDAY WITH HIGHS IN THE UPPER 70S TO LOW 80S
INLAND ALONG WITH OVERNIGHT LOWS IN THE 50S.
A WEAK COLD FRONT WILL MOVE ONSHORE SATURDAY, INCREASING
SOUTHWESTERLY WINDS ACROSS THE AREA AND A SLIGHT CHANCE FOR RAIN
SHOWERS ALONG THE COAST. CHANCES FOR PRECIPITATION ARE 10-30%
NORTH OF LINCOLN CITY WITH THE HIGHEST CHANCES OVER THE LONG
BEACH PENINSULA. QPF TOTALS WILL BE VERY LIGHT AT 0.05 INCHES OR
LESS. WIND GUSTS 20-25 MPH WILL BE POSSIBLE WITH LOCALLY HIGHER
GUSTS UP TO 30-35 MPH ALONG THE COAST AND WITHIN THE COLUMBIA
RIVER GORGE.
LOOKING BEYOND THE WEEKEND, MORE SEASONABLE TEMPERATURES HANG
ON INTO EARLY NEXT WEEK BEFORE UNCERTAINTY INCREASES DURING THE
MIDDLE OF THE WEEK. CLUSTER ANALYSIS FAVORS THE RIDGE SLOWLY
BUILDING BACK INTO THE PACNW WHICH IN TURN WOULD BRING AN
INCREASE IN AFTERNOON HIGH TEMPERATURES. THE NBM 10TH-90TH
PERCENTILE SHOWS AN 8-12 DEGREE SPREAD FOR MOST DAYS NEXT WEEK,
RANGING FROM THE LOW TO UPPER 80S FOR INLAND LOCATIONS. THERE IS
NOT A SIGNAL FOR A MAJOR WARM-UP AT THIS POINT. SHORTWAVES
TRANSITING THE REGION WITHIN THE SOUTHWESTERLY FLOW ALOFT MAY
BRING FURTHER CHANCES FOR LIGHT PRECIPITATION, PARTICULARLY
ALONG THE COAST, BUT THE UNCERTAINTY IN THE POSITION AND TIMING
OF THESE FEATURES IS LOW AT THIS TIME. -19/36
AVIATION...THROUGH 00Z SUNDAY
SATELLITE IMAGERY AND TERMINAL
OBSERVATIONS AS OF EARLY FRIDAY AFTERNOON DEPICTS VFR CONDITIONS
WITH MOSTLY SUNNY SKIES ACROSS THE WILLAMETTE VALLEY, AND A MIX OF
MVFR/VFR CONDITIONS ALONG THE COAST AS MARINE CLOUDS LINGER. MODELS
ARE IN GOOD AGREEMENT IFR AND MVFR CEILINGS WILL FILL IN ALONG THE
ENTIRE COAST THROUGH 03Z SUNDAY AND PERSIST THROUGH 00Z SUNDAY.
INLAND TERMINALS REMAIN PREDOMINATELY VFR THROUGH THE TAF PERIOD,
WITH A 15-30% CHANCE FOR MVFR STRATUS AT ANY GIVEN HOUR BETWEEN 10-
18Z SAT AS A MODEST SOUTHWESTERLY ORIENTED MARINE PUSH BRINGS AT
LEAST SOME MARINE CLOUDS THROUGH THE COAST RANGE GAPS OVERNIGHT.
WINDS INCREASE WITH THE FRONTAL PASSAGE SATURDAY AFTERNOON WITH
GUSTS UP TO 25 KT ALONG THE COAST AND UP TO 20 KT ACROSS THE
WILLAMETTE VALLEY.
KPDX AND APPROACHES...PREDOMINATELY VFR THROUGH THE TAF PERIOD WITH
A 20-30% CHANCE FOR MVFR CIGS AT ANY GIVEN HOUR BETWEEN 12-18Z
SATURDAY. A BRIEF PERIOD OF GUSTY NORTHWESTERLY WINDS THIS EVENING
BEFORE EVENTUALLY TURNING SOUTHERLY OVERNIGHT WITH GUSTS OF 15-20 KT
SATURDAY AFTERNOON.
MARINE
WEAK LOW PRESSURE OFFSHORE CONTINUES TO SUPPORT LIGHT
WINDS UNDER 10 KT AND SEAS OF 4-5 FT EARLY THIS AFTERNOON. AS A
FRONT APPROACHES THE WATERS ON SATURDAY, SOUTHERLY WINDS WILL
INCREASE TO 15-25 KT WITH GUSTS UP TO 30 KT SATURDAY AFTERNOON.
A SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THROUGH 8 PM
SATURDAY ACROSS THE WATERS, AND FROM 11 AM THROUGH 8 PM SATURDAY
AT THE COLUMBIA RIVER BAR. SEAS DURING THIS TIME WILL ALSO BUILD
SLIGHTLY TO 6-7 FT WITH A DOMINANT NORTHWEST SWELL AT 8-9
SECONDS. BEHIND THE FRONTAL BOUNDARY, WINDS QUICKLY EASE DOWN TO
AROUND 10-15 KT OUT OF THE SOUTH AND SEAS TO 4-5 FT, PERSISTING
THROUGH AT MIDWEEK. SEASONABLE NORTHERLY FLOW RETURNS WEDNESDAY
THROUGH THE END OF THE WORKWEEK. -10/36
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 11 AM TO 8 PM PDT SATURDAY FOR PZZ210.
SMALL CRAFT ADVISORY FROM 8 AM TO 8 PM PDT SATURDAY FOR
PZZ251>253-271>273.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page