381
FXUS66 KPQR 082153 AAA
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
253 PM PDT SUN JUN 8 2025
SYNOPSIS
HIGH PRESSURE OVER THE REGION WILL LEAD TO HOT
TEMPERATURES FOR INLAND AREAS WHILE THE COAST REMAINS COOL
THROUGH MONDAY. INCREASING ONSHORE FLOW WILL BRING A GRADUAL
RETURN TO COOLER TEMPERATURES FOR INLAND LOCATIONS THIS WEEK.
SHORT TERM...NOW THROUGH TUESDAY NIGHT
UPPER LEVEL RIDGING IS
PEAKING TODAY, WITH VERY WARM AFTERNOON TEMPERATURES THIS AFTERNOON
AS THE RIDGE AXIS PASSES DIRECTLY OVERHEAD. DAILY RECORD HIGHS ARE
NOT OUT OF THE QUESTION FOR MUCH OF THE WILLAMETTE VALLEY TODAY, AS
LITTLE TO NO CLOUD COVER IS EXPECTED AND STRONG DAYTIME HEATING IS
EXPECTED. NBM SHOWS A 70-90% CHANCE OF AFTERNOON HIGHS EXCEEDING 95
DEGREES FOR AREAS NORTH OF SALEM IN THE WILLAMETTE VALLEY, HIGHEST
AROUND THE PORTLAND METRO AREA. THE COLUMBIA RIVER GORGE GOING EAST
THROUGH HOOD RIVER VALLEY SEES SIMILAR TEMPERATURES. SOUTH OF SALEM,
SLIGHTLY LOWER TEMPERATURES CLOSER TO THE LOW 90S TODAY. THE COAST
INSTEAD SEES TEMPERATURES CLOSER TO THE LOW 70S THIS AFTERNOON.
OVERNIGHT LOWS WILL DROP TO THE MID 60S FOR MOST INLAND AREAS,
REMAINING FAIRLY ELEVATED FOR THIS TIME OF YEAR. WITH MODERATE HEAT
RISK, THE HEAT ADVISORY REMAINS IN PLACE THROUGHOUT THE DURATION OF
TODAY FOR THE ENTIRETY OF THE WILLAMETTE VALLEY AND ADJACENT CASCADE
FOOTHILLS, THE PORTLAND/VANCOUVER METRO, LOWER COLUMBIA/COWLITZ RIVER
VALLEYS, COLUMBIA GORGE, AND HOOD RIVER VALLEY. THOSE SENSITIVE TO
HEAT, AND ESPECIALLY THOSE WITHOUT EFFECTIVE COOLING AND/OR
HYDRATION, MAY FEEL IMPACTS FROM THE HEAT. A SMALLER AREA EXTENDING
FROM THE URBAN CORE OF THE PORTLAND/VANCOUVER METRO EAST THROUGH THE
COLUMBIA GORGE TO THE HOOD RIVER VALLEY WHERE BOTH DAYTIME AND
OVERNIGHT TEMPERATURES ARE EXPECTED TO BE THE HOTTEST MAY SEE MAJOR
HEATRISK, MEANING THE HEAT MAY AFFECT ANYONE WITHOUT ADEQUATE COOLING
AND/OR HYDRATION.
MONDAY SEES SIMILAR TEMPERATURES, WITH THE HEAT ADVISORY CONTINUING
THROUGH MONDAY EVENING. TEMPERATURES ON MONDAY AS WELL SEE A 40-70%
CHANCE OF EXCEEDING 95 DEGREES IN THE AFTERNOON, WITH SLIGHTLY BETTER
CHANCES OF THE SOUTHERN WILLAMETTE VALLEY SEEING TEMPERATURES ABOVE
95 DEGREES IN THE AFTERNOON. OVERALL FAIRLY SIMILAR CONDITIONS TO
TODAY, THOUGH OVERNIGHT TEMPERATURES MONDAY NIGHT WILL BE SLIGHTLY
COOLER, IN THE MID TO UPPER 50S. TUESDAY SEES THE RIDGE REALLY START
BREAKING DOWN, WITH TEMPERATURES IN THE MID TO UPPER 80S THROUGHOUT
MOST INLAND AREAS. TUESDAY NIGHT SEES TEMPERATURES BOTTOMING OUT
CLOSER TO THE LOW 50S FOR INLAND AREAS, BRINGING HEATRISK TO MINOR.
/JLIU/PICARD
LONG TERM...WEDNESDAY THROUGH SATURDAY
ENSEMBLE GUIDANCE
REMAINS IN GOOD AGREEMENT THAT THE UPPER-LEVEL RIDGE WILL WEAKEN
AND SHIFT FARTHER INLAND TOWARD THE ROCKIES THROUGH THE WEEK,
WHILE WEAK TROUGHING ARRIVE IN THE PACIFIC NORTHWEST. INCREASED
ONSHORE FLOW WILL CONTINUE TO SEE TEMPERATURES COOL TO MORE
SEASONAL LEVELS IN THE UPPER 50S TO 60S ALONG THE COAST AND 60S
TO 70S INLAND BY THE END OF THE WORKWEEK. DESPITE REPEATED
SHORTWAVES WHICH MAY MOVE ONSHORE IN THE LATTER HALF OF THE
WEEK, LONG-RANGE ENSEMBLES SUGGEST THE NEXT CHANCE FOR RAIN MAY
NOT BE UNTIL FRIDAY OR WEEKEND. EVEN THEN, EARLY INDICATIONS SHOW
VERY LITTLE RAIN ACCUMULATIONS AS ANY MOISTURE LOOKS FAIRLY WEAK.
-PICARD
AVIATION
LITTLE CHANGE IN THE FORECAST AS STRONG HIGH PRESSURE
MAINTAINS CLEAR SKY VFR CONDITIONS ACROSS THE REGION THROUGH THE
PERIOD. A NARROW BAND OF MARINE STRATUS CONTINUES TO SHIFT SOUTH
AND HAS NEARLY DISSIPATED ALONG THE CENTRAL OR COAST AS OF 21Z
SUN. CURRENT TRENDS CALL INTO QUESTION HOW QUICKLY THE MARINE
LAYER WILL BECOME RE-ESTABLISHED AT THE COASTAL TERMINALS
TONIGHT, BUT STILL EXPECT IFR/LIFR CIGS TO REDEVELOP AT KONP BY
02-04Z. IFR/LIFR PROBS ARE LOWER WITH NORTHWARD EXTENT, BUT
GUIDANCE DOES STILL HINT AT STRATUS AND FOG EVENTUALLY MAKING INTO
KAST 06-09Z MON. ANY STRATUS AND FOG THAT DOES REDEVELOP SHOULD
DISSIPATE BY 18Z MON AS COASTAL SITES CONTINUE TO FOLLOW A
STANDARD SUMMERTIME DIURNAL TREND WITH RESPECT TO MARINE STRATUS.
ELSEWHERE, HIGH TEMPERATURES IN THE MID TO UPPER 90S COULD RESULT
IN LOWER AIR DENSITY CONDITIONS AT THE INLAND TERMINALS THROUGH
MONDAY.
PDX AND APPROACHES...VFR UNDER CLEAR SKIES THROUGH THE PERIOD.
WEST WINDS 7-10 KT BECOMING NORTHWEST AROUND 5 KT AFTER 03Z MON.
/CB
MARINE
SURFACE HIGH PRESSURE CENTERED WELL OFFSHORE WILL
MAINTAIN A NORTHERLY WIND REGIME OVER THE COASTAL WATERS THROUGH
THE UPCOMING WEEK. SMALL CRAFT ADVISORIES WILL GO INTO EFFECT THIS
EVENING AS SEAS INCREASE INTO THE 6-8 FT RANGE WITH THE ARRIVAL OF
A BUILDING MID PERIOD SWELL FROM THE NORTHWEST. NORTHERLY WINDS
WILL ALSO BEGIN TO STRENGTHEN A BIT AS THE SURFACE PRESSURE
GRADIENT TIGHTENS, HOWEVER THE STRONGEST GUSTS TO 25 KT WILL
GENERALLY REMAIN BEYOND 30 NM OFFSHORE. EXTENDED THE CURRENT
HEADLINES OUT THROUGH TUESDAY AFTERNOON AS SEAS CONTINUE TO BUILD
INTO THE 8-10 FT RANGE BY MONDAY. /CB
CLIMATE
DAILY RECORD HIGH TEMPERATURES:
SUNDAY, JUNE 8
PORTLAND94 (1955)
SALEM98 (1955)
EUGENE93 (2015)
ASTORIA 97 (1903)
MONDAY, JUNE 9
PORTLAND95 (1955)
SALEM96 (1955)
EUGENE91 (2015)
ASTORIA 87 (1924)
PQR WATCHES/WARNINGS/ADVISORIES
OR...HEAT ADVISORY UNTIL 10 PM PDT MONDAY FOR ORZ108>125.
WA...HEAT ADVISORY UNTIL 10 PM PDT MONDAY FOR WAZ204>210.
PZ...SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 6 PM PDT TUESDAY
FOR PZZ251>253.
SMALL CRAFT ADVISORY UNTIL 6 PM PDT TUESDAY FOR PZZ271>273.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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