375
FXUS66 KPQR 051050 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
350 AM PDT SUN JUL 5 2026
UPDATED AVIATION DISCUSSION
SYNOPSIS
WARM AND SUNNY CONDITIONS CONTINUE THROUGH MONDAY
AS HIGH PRESSURE BUILDS OVER THE REGION. THIS WILL RESULT IN
LOCALIZED MODERATE HEATRISK. AN UPPER-LEVEL TROUGH MOVING INTO
BRITISH COLUMBIA TUESDAY TO WEDNESDAY WILL COOL TEMPERATURES A
FEW DEGREES AND BRING SLIGHT CHANCES FOR PRECIPITATION ALONG THE
SOUTH WASHINGTON COAST. SEASONABLE TEMPERATURES RETURN THURSDAY
TO FRIDAY WITH PERSISTENT ONSHORE FLOW. MAKE SURE TO PRACTICE
WATER SAFETY WHEN SWIMMING IN LOCAL RIVERS.
SHORT TERM...TODAY THROUGH MONDAY NIGHT
TODAY INTO MONDAY,
THERE REMAINS LITTLE CHANCE IN OVERALL ENSEMBLE GUIDANCE WHEN
COMPARED TO THE LAST 24-36 HOURS. ENSEMBLES CONTINUE TO SHOW
HIGH PRESSURE, ORIGINATING FROM THE GREAT BASIN WILL SLOWLY
BUILD OVER THE PACIFIC NORTHWEST, RESULTING IN WARMER
TEMPERATURES ACROSS THE AREA. DAYTIME HIGHS FOR INLAND LOCATIONS
ARE EXPECTED IN THE LOW TO MID 80S, FOR THE COAST EXPECTED
UPPER 60S TO MID 70S AND FOR THE CASCADES UPPER 60S TO UPPER
70S. MONDAY IS STILL ON TRACK TO BE THE WARMEST THIS WEEK, WITH
DAYTIME HIGHS ACROSS THE CWA 3-5 DEGREES F WARMER THAN TODAY.
CHANCES FOR EXCEEDING 90 DEGREES REMAIN AROUND 15-40% CHANCE
ACROSS THE WILLAMETTE VALLEY AND THE UPPER HOOD RIVER VALLEY.
HOWEVER, WE'LL STILL HAVE SOME LOCALIZED MODERATE HEATRISK ON
MONDAY WITHIN THE INNER PORTLAND METRO AND PARTS OF THE GORGE
AND UPPER HOOD RIVER VALLEY. THIS MEANS THIS LEVEL OF HEAT WILL
AFFECT THOSE SENSITIVE TO HEAT, ESPECIALLY THOSE WITHOUT
ADEQUATE COOLING OR HYDRATION. LOW TEMPERATURES IN THE 50S
ACROSS THE ENTIRE AREA SHOULD PROVIDE DECENT OVERNIGHT RELIEF
FROM THE HEAT.
IT IS IMPORTANT TO REMEMBER THAT WHILE TEMPERATURES WILL BE
WARM, MANY LOCAL LAKES AND RIVERS REMAIN VERY COLD AND CAN
CAUSE COLD WATER SHOCK. ALSO, RIVERS MAY STILL HAVE SWIFT
CURRENTS IN SOME AREAS, WHICH CAN QUICKLY SWEEP YOU AWAY. PLEASE
PRACTICE WATER SAFETY BY WEARING LIFE JACKETS, VISITING WITH A
BUDDY, AND ALWAYS BEING AWARE OF YOUR SURROUNDINGS. /42
LONG TERM...TUESDAY THROUGH SATURDAY
ENSEMBLE MODELS
CONTINUE TO SHOW MINIMAL CHANGE IN THE OVERALL FORECAST. SAID
MODELS CONTINUE TO SHOW AN UPPER-LEVEL TROUGH FROM THE GULF OF
ALASKA MOVING EAST/SOUTHEASTWARD INTO BRITISH COLUMBIA AND DE-
AMPLIFYING AN UPPER-LEVEL HIGH PRESSURE ANCHORED OVER THE GREAT
BASIN. MODELS CONTINUE TO KEEP THE ALASKAN SYSTEM NORTH OF THE
REGION, WHICH WILL KEEP THE REGION DRY, BUT WILL HELP TO
MAINTAIN RELATIVELY COOLER ONSHORE FLOW. ONSHORE FLOW LOOKS TO
INCREASE BY THE MIDDLE OF THE WEEK AND WILL HELP TO KEEP THE CWA
A FEW DEGREES CLOSER TO SEASONAL NORMALS FOR EARLY JULY. WEST-
NORTHWESTERLY WINDS ARE GENERALLY EXPECTED TO BE LIGHT FOR MOST
AREAS THROUGH THE END OF THE WEEK. HOWEVER, WILL SEE LOCALLY
BREEZIER WINDS ALONG THE CENTRAL COLUMBIA RIVER GORGE AND UPPER
HOOD RIVER VALLEY, WHERE THERE IS A 10-30% CHANCE FOR AT LEAST
ISOLATED WIND GUSTS EXCEEDING 40 MPH TUESDAY AND WEDNESDAY.
AT THE END OF NEXT WEEK AND INTO NEXT WEEKEND, MOST ENSEMBLE
MEMBERS SHOW THE AFOREMENTIONED TROUGH WEAKENING AS IT MOVES
EASTWARD THROUGH BRITISH COLUMBIA. AT THE SAME TIME, ENSEMBLE
MEMBERS ARE SHOWING ADDITIONAL TROUGHING MOVING DOWN FROM THE
GULF OF ALASKA INTO THE NORTHEAST PACIFIC/BRITISH COLUMBIA.
THERE STILL REMAINS UNCERTAINTY WITH THE EXACT PLACEMENT AND
MAGNITUDE OF THIS ADDITIONAL TROUGHING, THUS UNCERTAINTY WITH
ANY POTENTIAL IMPACTS AT THIS TIME. IF THIS PATTERN DOES PAN
OUT, THIS WOULD SUPPORT CONTINUED ONSHORE FLOW WITH SEASONABLE
TEMPERATURES AND LITTLE TO NO PRECIPITATION. /42-10
AVIATION
GENERALLY VFR CONDITIONS REMAIN IN PLACE ACROSS MOST
OF THE AIRSPACE AS SURFACE HIGH PRESSURE CONTINUES TO BUILD, BUT
CHANCES INCREASE FOR MVFR CIGS DEVELOPING THROUGH 18Z SUNDAY
ACROSS THE AIRSPACE. ALONG THE COAST, 60-80% CHANCE IN MVFR AND
25-35% CHANCE FOR IFR CONDITIONS TO DEVELOP THROUGH 18Z SUNDAY.
HIGHEST CHANCES ALONG THE NORTH OR AND SOUTH WA COAST NEAR KAST.
FOR INLAND LOCATIONS, BACK BUILDING CLOUDS FROM THE CASCADES ARE
RESULTING IN A 10-40% CHANCE OF MVFR CONDITIONS IMPACTING LOCATIONS
WITHIN THE WILLAMETTE VALLEY. HIGHEST CHANCES ARE IN THE NORTHERN
WILLAMETTE VALLEY, PRIMARILY FOR KPDX, KVUO, KTTD, KHIO AND KUAO
THROUGH 18Z SUNDAY. ANY LOWERED FLIGHT CONDITIONS SHOULD IMPROVE
TO VFR AROUND 18Z-20Z SUNDAY AND PERSIST THROUGH AROUND 06Z-08Z
MONDAY, WHEN MARINE STRATUS IS EXPECTED TO RETURN AND IMPACT
COASTAL LOCATIONS.
NORTHERLY WINDS PERSIST AROUND 5-10 KT AND ARE EXPECTED TO
STRENGTHEN TO 8-12 KT AROUND 23Z SUNDAY THROUGH 03Z MONDAY FOR
INLAND LOCATIONS. ALONG THE COAST, NORTHERLY WINDS ALSO PERSIST
AROUND 7-12 KT AND ARE EXPECTED TO STRENGTHEN TO 8-15 KT AROUND
20Z SUNDAY THROUGH 06Z MONDAY. GUSTS UP TO 25 KT EXPECTED ALONG
THE COAST AND GUSTS UP TO 20 KT WITHIN THE WILLAMETTE VALLEY.
KPDX AND APPROACHES...VFR CONDITIONS EXPECTED THROUGH THE MAJORITY
OF THE TAF PERIOD. 20-40% CHANCE OF BACKBUILDING MVFR CIGS DEVELOPING
THROUGH 18Z SUNDAY, WITH ANY LOWERED FLIGHT CONDITIONS SHOULD IMPROVING
BACK TO VFR AFTERWARDS. NORTHERLY WINDS PERSIST AROUND 5-10 KT AND
ARE EXPECTED TO STRENGTHEN TO 7-12 KT AROUND 00Z MONDAY, WITH GUSTS
UP TO TO 20 KT. /42
MARINE
HIGH PRESSURE OVER THE REGION IS RESULTING IN
INCREASING WINDS AND BUILDING SEAS THROUGH MONDAY. NORTHERLY
WINDS WILL CONTINUE TO SLOWLY INCREASE THROUGH THIS AFTERNOON
WITH GUSTS UP TO 30 KT EXPECTED. SEAS WILL BUILD FROM 4 TO 6 FT
TOWARDS 6 TO 8 FT THROUGH TODAY AS WELL. HIGHEST WINDS EXPECTED
IN ZONES PZZ252, PZZ253, PZZ272 AND PZZ273. THEREFORE, WILL MAINTAIN
THE CURRENT SUITE OF SMALL CRAFT ADVISORIES THROUGH TONIGHT.
CONDITIONS EASE MONDAY NIGHT INTO TUESDAY AS HIGH PRESSURE GIVES
WAY TO A BROAD UPPER LEVEL TROUGH MOVING SOUTHEASTWARD OUT OF
THE GULF OF ALASKA, WHICH WILL BRING ABOUT RELATIVELY BENIGN
CONDITIONS THROUGH THE REMAINDER OF THE WEEK. /42
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 2 AM PDT MONDAY FOR PZZ251>253-
271>273.
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