793
FXUS66 KPQR 242203
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
303 PM PDT FRI JUL 24 2026
SYNOPSIS
MORE SEASONABLE TEMPERATURES RETURN ACROSS THE
REGION THIS WEEKEND. A PASSING FRONT WILL BEING CHANCES FOR
LIGHT SHOWERS TO THE COAST AND COAST RANGE. SIMILAR CONDITIONS
PERSIST INTO NEXT WEEK.
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. THE
BEST CLEARING ALONG THE COAST WOULD BE FROM NOW THROUGH 00-03Z
SAT. AFTER 00-03Z SAT, IFR/MVFR MARINE STRATUS COMPLETELY RETURNS
TO THE COAST. INLAND TERMINALS REMAIN PREDOMINATELY VFR THROUGH
THE TAF PERIOD, WITH A 15-30% CHANCE FOR MVFR STRATUS AT ANY GIVEN
HOUR BETWEEN 10-16Z SAT AS THE LOW LEVEL ATMOSPHERE MOISTENS.
WEST-SOUTHWESTERLY WINDS AROUND 5-10 KT THROUGH THIS EVENING FOR
MOST TERMINALS, TURNING MORE SOUTHERLY SATURDAY MORNING AS A FRONT
APPROACHES. 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 15-30% CHANCE FOR MVFR CIGS AT ANY GIVEN HOUR BETWEEN
10-16Z SAT. NORTHWESTERLY WINDS UNDER 10 KT THROUGH THIS EVENING,
TURNING SOUTHERLY AND INCREASING NEAR 10 KT SATURDAY MORNING. -10
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.
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