748
FXUS66 KPQR 081000
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
300 AM 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
CONTINUES TO BUILD OVER THE REGION, WITH THE LATEST WATER VAPOR
IMAGERY SHOWING HIGH PRESSURE ALOFT CENTERED JUST OFFSHORE OF
SOUTHWESTERN OREGON EARLY THIS MORNING. THIS FEATURE WILL SLOWLY
BUT STEADILY TRACK EASTWARD WITH THE RIDGE AXIS PASSING OVERHEAD
TODAY. MID-LEVEL WARMTH WILL PEAK TODAY AND MONDAY AS 850-HPA
TEMPERATURES REACH 19-21C EACH AFTERNOON, DESPITE THE RIDGE
CONTINUING TO SHIFT EAST AND BEGINNING TO DEAMPLIFY ON MONDAY.
DEEP MIXING AND ABUNDANT SUNSHINE WILL REALIZE HOT SURFACE
TEMPERATURES INLAND EACH DAY, LIKELY THE HOTTEST DAYS OF THE
YEAR SO FAR AND PUTTING DAILY RECORD HIGHS IN PORTLAND, SALEM,
AND EUGENE IN JEOPARDY. THERE REMAINS HIGH CONFIDENCE IN
TEMPERATURES REACHING AFTERNOON HIGHS IN THE UPPER 80S TO 90S
ACROSS INTERIOR LOW ELEVATIONS, WITH GREATER THAN 50% LIKELIHOOD
OF REACHING 95F OR HOTTER ALONG MUCH OF THE I-5/I-84 CORRIDORS,
AND AS HIGH AS 75-95% LIKELIHOOD FROM SALEM NORTH TO PORTLAND
AND EAST TO HOOD RIVER. MILD OVERNIGHT LOWS TONIGHT IN THE UPPER
50S TO MID 60S MAY PROVIDE LIMITED RELIEF FROM THE HEAT.
THIS COMBINATION OF HOT DAYTIME AND MILD OVERNIGHT TEMPERATURES
WILL YIELD WIDESPREAD MODERATE HEATRISK ACROSS AREAS EAST OF
THE COAST RANGE AND WILLAPA HILLS, MEANING 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. MARGINALLY
COOLER TEMPERATURES LARGELY IN THE 50S MONDAY NIGHT WILL OFFER
MORE RELIEF, LIMITING THE INLAND HEATRISK TO MODERATE TO BEGIN
THE WORKWEEK. AS SUCH, HEAT ADVISORIES REMAIN IN EFFECT ACROSS
MOST INLAND AREAS, INCLUDING 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 FROM 10 AM TODAY THROUGH 10 PM MONDAY.
ALONG THE COAST, SUFFICIENT ONSHORE FLOW WILL YIELD MUCH COOLER
BUT STILL UNSEASONABLY WARM TEMPERATURES IN THE 60S TO MID 70S
THIS AFTERNOON. CONDITIONS WILL BEGIN TO TREND COOLER ALONG THE
COAST BY MONDAY AND INLAND ON TUESDAY AS THE RIDGE WEAKENS.
AFTERNOON HIGHS WILL REMAIN WARM TO HOT IN THE MID TO UPPER 80S
ACROSS INLAND LOW ELEVATIONS ON TUESDAY, WHILE OVERNIGHT LOWS
IN THE 40S AND 50S ACROSS THE REGION TUESDAY NIGHT WILL LIMIT
THE HEATRISK TO MINOR. -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. -PICARD
AVIATION
AS OF 10Z SUNDAY, VFR CONDITIONS AND CLEAR SKIES
THROUGHOUT MOST OF THE AIRSPACE, WITH LIFR FOG AT KTMK AND
SOUTHWARD (INCLUDING KONP) BEING THE ONLY EXCEPTION. EXPECT
THESE DETERIORATED COASTAL CONDITIONS TO PERSIST UNTIL 18-20Z
SUNDAY, THEN LIKELY IMPROVE BACK TO VFR. BY 03Z MONDAY, LOW
STRATUS/FOG WILL LIKELY REDEVELOP, BRINGING A RETURN OF IFR/LIFR
CONDITIONS. PROBABILISTICALLY, THERE IS A 20-40% CHANCE OF LIFR
CIGS AND 50-70% CHANCE OF IFR CIGS AFTER 03-04Z MONDAY.
INLAND WILL STAY VFR THROUGH THE TAF PERIOD. EXPECT NORTHERLY TO
WESTERLY WINDS UNDER 10 KT FOR ALL TERMINALS THROUGH THE TAF
PERIOD. DAYTIME HIGH TEMPERATURES WILL BE IN THE 90S TODAY AND
TOMORROW FOR ALL INLAND TERMINALS. THIS COULD RESULT IN LOWER
AIR DENSITY CONDITIONS.
PDX AND APPROACHES...VFR CONDITIONS, CLEAR SKIES, AND
NORTHWESTERLY WINDS AROUND 3-7 KT THROUGH THE TAF PERIOD. ~HALL
MARINE
SURFACE HIGH PRESSURE CENTERED WELL OFFSHORE WILL
MAINTAIN A NORTHERLY FLOW REGIME WITH BUOYS OVER THE COASTAL
WATERS THROUGH THE UPCOMING WEEK. NORTHERLY WINDS WILL BEGIN TO
STRENGTHEN A BIT BY MONDAY EVENING AS THE SURFACE PRESSURE
GRADIENT TIGHTENS, HOWEVER THE STRONGEST WINDS WILL OCCUR BEYOND
30 NM OFFSHORE. GUIDANCE SUGGESTS THE OUTER WATERS WILL LIKELY
SEE 20-25 KT WIND GUSTS BY MONDAY EVENING. SEAS WILL ALSO BEGIN
TO TREND UPWARD EARLY IN THE COMING WEEK AS AN ONGOING
NORTHWESTERLY SWELL BUILDS TO 8 TO 10 FT, HIGHEST OVER THE OUTER
WATERS. AS A RESULT OF EXPECTED WINDS ON MONDAY EVENING, A
SMALL CRAFT ADVISORY FOR ALL WATERS HAS BEEN ISSUED FROM SUNDAY
EVENING THROUGH MONDAY NIGHT. NOTE THE ADVISORY WILL LIKELY NEED
TO BE EXTENDED BEYOND MONDAY NIGHT, BUT HAVE DECIDED TO HOLD
OFF ON EXTENDING THE ADVISORY THIS FAR OUT IN TIME FOR NOW.
~HALL/TK
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 FROM 10 AM THIS MORNING TO 10 PM PDT MONDAY FOR
ORZ108>125.
WA...HEAT ADVISORY FROM 10 AM THIS MORNING TO 10 PM PDT MONDAY FOR
WAZ204>210.
PZ...SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 5 AM PDT
TUESDAY FOR PZZ251>253.
SMALL CRAFT ADVISORY FROM 5 PM THIS AFTERNOON TO 5 AM PDT
TUESDAY FOR PZZ271>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