288
FXUS66 KPQR 082000
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
100 PM PDT WED JUL 8 2026
SYNOPSIS
PERSISTENT ONSHORE FLOW WILL CONTINUE TO YIELD DRY
AND SEASONABLE WEATHER THROUGH THIS WEEKEND. TEMPERATURES TREND
WARMER EARLY NEXT WEEK AS HIGH PRESSURE BUILDS OVER THE PLAINS.
DISCUSSION...NOW THROUGH TUESDAY
LARGELY ZONAL FLOW ALOFT
BENEATH THE BASE OF AN UPPER-LEVEL TROUGH MOVING INLAND THROUGH
BRITISH COLUMBIA HAS SUPPORTED MORE WIDESPREAD LOW CLOUD COVER
THIS MORNING. SATELLITE TRENDS DEPICT RAPID CLEARING AND MOSTLY
SUNNY SKIES ARE EXPECTED TODAY ACROSS THE REGION, SAVE PERHAPS
THE FAR-NORTHERN OREGON AND SOUTH WASHINGTON COASTS. ANOTHER
UPPER TROUGH OR CLOSED LOW MOVING INTO BRITISH COLUMBIA THIS
WEEKEND WILL SEE FLOW ALOFT TURN SOUTHWESTERLY, RESULTING IN
ONLY MINOR CHANGES TO THE SENSIBLE WEATHER LOCALLY, NAMELY A
FARTHER INLAND PENETRATION AND DELAYED CLEARING OF OVERNIGHT AND
MORNING CLOUD COVER. AS SUCH, SEASONABLE WEATHER WILL CONTINUE
WITH AFTERNOON HIGH TEMPERATURES WITHIN A FEW DEGREES OF 80F
INLAND AND IN THE LOW TO MID 60S ALONG THE COAST, OVERNIGHT LOWS
IN THE UPPER 40S TO LOW 50S, AND LARGELY DRY CONDITIONS. THE
ONLY EXCEPTION MAY BE AREAS OF MIST OR DRIZZLE ALONG THE COAST
AND COAST RANGE DURING THE EARLY MORNING HOURS WHEN MARINE
STRATUS COVER IS AT ITS THICKEST.
EARLY NEXT WEEK, THERE IS HIGH CONFIDENCE THAT BROAD UPPER
RIDGING WILL DEVELOP OVER THE CENTRAL PLAINS, PUSHING HEIGHTS
ALOFT HIGHER AND FAVORING A WARMING TREND LOCALLY. MOST-LIKELY
HIGH TEMPERATURES THROUGH THE FIRST HALF OF NEXT WEEK LOOK TO
REACH THE MID TO UPPER 80S INLAND AND MID 60S TO NEAR 70 DEGREES
ALONG THE COAST, WHILE OVERNIGHT LOWS SIMILARLY PUSH A FEW
DEGREES WARMER INTO THE 50S ACROSS THE REGION. THIS COMBINATION
OF TEMPERATURES CONTINUES TO SUPPORT MINOR HEATRISK ACROSS THE
MAJORITY OF THE REGION WITH ISOLATED AREAS OF MODERATE HEATRISK
IN THE PORTLAND/VANCOUVER METRO AND THROUGH THE COLUMBIA GORGE.
THERE REMAINS A BROAD REGION FROM SALEM NORTH THROUGH THE LOWER
COWLITZ VALLEY AND EAST ALONG THE I-84 CORRIDOR THROUGH THE
GORGE WHERE THERE IS A 20-50% CHANCE OF MODERATE HEATRISK ON
BOTH MONDAY AND TUESDAY IF FORECAST TEMPERATURES TREND WARMER,
WITH THE HIGHEST LIKELIHOOD IN THE LOWER TUALATIN VALLEY
(BEAVERTON, TIGARD, TUALATIN) AND NEIGHBORING PORTIONS OF
MULTNOMAH AND CLACKAMAS COUNTIES (PORTLAND, WILSONVILLE).
CHANCES FOR MAJOR HEATRISK ARE 5% OR LESS ACROSS THE REGION.
UNCERTAINTY IN THE TEMPERATURE FORECAST INCREASES BEYOND MIDWEEK
AS CONSENSUS IS RELATIVELY LOW IN THE LONG-TERM EVOLUTION OF
THE STRONG UPPER RIDGE. NONETHELESS, CHANCES FOR RAIN REMAIN
MINIMAL THROUGH THE PERIOD. -36
AVIATION
RELATIVELY LIGHT WEST TO NORTHWEST FLOW ALOFT TODAY
AS A BROAD UPPER LEVEL TROUGH PERSISTS OVER THE REGION.
PREDOMINATELY VFR CONDITIONS ARE EXPECTED FOR INLAND TERMINALS
THROUGH MUCH OF THE TAF PERIOD, AS THERE IS CURRENTLY JUST A
10-20% CHANCE FOR STRATUS TO REDEVELOP TOMORROW MORNING. ANY
LINGERING STRATUS IS EXPECTED TO SCATTER OUT BY 21Z THIS
AFTERNOON. COASTAL LOCATIONS ARE MORE LIKELY TO SEE MARINE
STRATUS PUSH BACK ONSHORE AFTER 06-10Z THURSDAY WITH AROUND A
30-40% CHANCE OF IFR CONDITIONS DEVELOPING.
NORTHWEST WINDS ARE EXPECTED TO INCREASE THIS AFTERNOON TO
AROUND 10-15 KT, WHILE GUSTS UP TO 25 KT WILL BE POSSIBLE
ALONG THE CENTRAL OREGON COAST.
KPDX AND APPROACHES...VFR EXPECTED WITH FEW LINGERING CLOUDS
THIS AFTERNOON. ONLY AROUND A 10% CHANCE OF MVFR STRATUS
REDEVELOPING AFTER 12Z THU. NORTHWEST WINDS ARE EXPECTED TO
INCREASE TO AROUND 10-12 KT WITH GUSTS UP TO 20 KT POSSIBLE
BETWEEN 00-06Z THU. /DH
MARINE
HIGH PRESSURE WILL MAINTAIN NORTH TO NORTHWESTERLY
WINDS ACROSS THE COASTAL WATERS THROUGH THE WEEK. WINDS
GENERALLY REMAIN AROUND 15 KT OR LESS, THOUGH PRESSURE GRADIENTS
ARE EXPECTED TO TIGHTEN LATER THIS AFTERNOON AND EVENING
PRODUCING GUSTS UP TO 25 KT NEAR THE CENTRAL OREGON COAST. THUS,
HAVE ISSUED A SMALL CRAFT ADVISORY FOR THE COASTAL WATERS SOUTH
OF CAPE FOULWEATHER BETWEEN 3 PM TODAY AND 2 AM TONIGHT.
ISOLATED GUSTS UP TO 20-22 KT WILL ALSO BE POSSIBLE SOUTH OF
CAPE FALCON.
CONDITIONS EASE SLIGHTLY ON THURSDAY, AND MORESO ON FRIDAY, AS A
WEAK FRONT APPROACHES THE WATERS. SEAS ARE EXPECTED TO REMAIN
AROUND 4 TO 6 FT AS RELATIVELY BENIGN CONDITIONS PERSIST THROUGH
THE REMAINDER OF THE WEEK AND INTO THE WEEKEND. /DH
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 2 AM PDT THURSDAY FOR PZZ253-273.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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