719
FXUS66 KPQR 110424 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
924 PM PDT TUE JUN 10 2025
..UPDATED AVIATION DISCUSSION AND WWA
SYNOPSIS
A PATTERN CHANGE ALOFT WILL SEE A STEADY TRANSITION
TO COOLER WEATHER THROUGH THE WEEK AS ONSHORE FLOW STRENGTHENS.
LARGELY DRY CONDITIONS CONTINUE INTO THE WEEKEND, WITH THE NEXT
CHANCE FOR WIDESPREAD RAIN NOT EXPECTED UNTIL NEXT WEEK.
SHORT TERM...NOW THROUGH FRIDAY NIGHT
TEMPERATURES TODAY REMAIN
SOMEWHAT ELEVATED, WITH AFTERNOON HIGHS IN THE MID TO UPPER 80S
THROUGHOUT MOST OF THE INLAND AREAS. THE HOTTEST TEMPERATURES AROUND
90 DEGREES ARE EXPECTED ALONG THE CENTRAL COLUMBIA GORGE TO AROUND
HOOD RIVER, WHERE LOCALLY MODERATE HEATRISK MAY STILL PRESENT
HAZARDOUS CONDITIONS FOR THOSE WITHOUT EFFECTIVE COOLING AND/OR
ADEQUATE HYDRATION. THOSE SEEKING RELIEF FROM THE HEAT IN AREA LAKES
AND RIVERS SHOULD CONTINUE TO BE AWARE THAT WATER TEMPERATURES REMAIN
COLD AND HYPOTHERMIA CAN OCCUR DESPITE HOT AIR TEMPERATURES. COASTAL
HIGHS TODAY ARE CLOSER TO 60 DEGREES.
INCREASINGLY COOL TEMPERATURES IN THE NEXT FEW DAYS AS NORTHWEST
ONSHORE FLOW CONTINUES, BRINGING STEADILY DECREASING AFTERNOON HIGH
TEMPERATURES. UPPER LEVEL TROUGHING IS BEGINNING TO DEVELOP IN THE
NORTHERN PACIFIC OCEAN, THOUGH NO PRECIPITATION IS EXPECTED THROUGH
THE REST OF THE SHORT TERM. TEMPERATURES DAY-OVER-DAY CONTINUE TO
DECLINE, BOTTOMING OUT ON FRIDAY. ON FRIDAY, WE SEE A 70-80% CHANCE
OF HIGH TEMPERATURES IN THE WILLAMETTE VALLEY AND COLUMBIA LOWLANDS
EXCEEDING 70 DEGREES. RH VALUES CONTINUE TO INCREASE AS WELL DURING
THIS TIME, WITH MIN RH VALUES REACHING AROUND 40% ON FRIDAY.
/JLIU/PICARD
LONG TERM...SATURDAY THROUGH MONDAY
CONTINUED ENSEMBLE GUIDANCE
SHOWING A CLOSED UPPER LOW WILL TRACK TO THE SOUTHEAST FROM
SOUTH-CENTRAL ALASKA TOWARD THE HAIDA GWAII THIS WEEKEND. REPEATED
SHORTWAVE IMPULSES ON THE SOUTHERN FLANK OF THE LOW MAY BRING CHANCES
FOR LIGHT RAIN TO THE REGION THIS WEEKEND, BUT FEW ENSEMBLE MEMBERS
SUGGEST MUCH IN THE WAY OF ACCUMULATIONS UNTIL EARLY NEXT WEEK WHEN A
MORE ROBUST SHORTWAVE COULD BRING THE BEST CHANCE FOR WIDESPREAD
ACCUMULATING RAIN IN ALMOST TWO WEEKS. EVEN THEN, ONLY AROUND A
50-60% CHANCE OF ACCUMULATING RAINFALL AT THE MOMENT. /JLIU/PICARD
AVIATION
SATELLITE IMAGERY AS OF TUESDAY EVENING DEPICTS VFR
CONDITIONS WITH HIGH CLOUDS OVER THE WILLAMETTE VALLEY WHILE THE
COAST MAINTAINS MVFR STRATUS. HIGH CONFIDENCE COASTAL TERMINALS
MAINTAIN IFR/MVFR CIGS THROUGH WEDNESDAY MORNING. VFR CONDITIONS
PREVAIL INLAND THROUGH MOST OF THE TAF PERIOD. AN EXCEPTION WOULD BE
THE SOUTHERN WILLAMETTE VALLEY, WHERE GUIDANCE SUGGESTS A 30-50%
CHANCE FOR MVFR CIGS BETWEEN 10-16Z WED AS WINDS SHIFT MORE WEST-
SOUTHWESTERLY OVERNIGHT AND BRING MORE MOISTURE. ANY LOW STRATUS IN
THE VALLEY OVERNIGHT SHOULD DISSIPATE FROM DAYTIME HEATING BY 16-18Z
WED. ALONG THE COAST, MARINE STRATUS LIFTS ABOVE IFR THRESHOLDS
AFTER 19-20Z WED, BUT LIKELY (50-70% CHANCE) REMAINS MVFR THROUGH
WEDNESDAY EVENING. EXPECT WINDS TO BE AROUND 10 KT OR LESS.
PDX AND APPROACHES...VFR THROUGH THE TAF PERIOD WITH HIGH CLOUDS.
WEST-NORTHWESTERLY WINDS UNDER 10 KT. -ALVIZ
MARINE
ONSHORE CONTINUES TO AMPLIFY TODAY AS A WEAK AREA OF LOW
PRESSURE DROPS DOWN OVER THE WATERS. WILL SEE CLOUDY SKIES AND SEA
BREEZES IN THE AFTERNOON. NORTHWESTERLY WINDS OF 10-15 KT WITH GUSTS
UP TO 25 KT EXPECTED, ESPECIALLY IN THE OUTER WATERS. THE INNER
WATERS WILL BE LESS IMPACTED. 60-80% CHANCE OF GUSTS GREATER THAN 20
KT FOR THE INNER WATERS SOUTH OF TILLAMOOK THIS AFTERNOON INTO EARLY
WEDNESDAY MORNING. THE NORTHERN INNER WATERS HAVE MINIMAL CHANCES.
SEAS WILL BE PERSISTENT AT 7-10 FT AT 11 SECONDS. THE OUTER WATERS,
BETWEEN 30-60 NM WILL SEE MORE CONSISTENT 10 FT SEAS THROUGH
WEDNESDAY. WINDS AND SEAS WILL EASE ON THURSDAY BEFORE INCREASING
AGAIN ON FRIDAY. -MUESSLE
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 2 AM TO 9 AM PDT WEDNESDAY FOR PZZ210.
SMALL CRAFT ADVISORY UNTIL 5 PM PDT WEDNESDAY FOR PZZ271>273.
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