164
FXUS66 KPQR 101826
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
1125 AM PDT FRI JUL 10 2026
UPDATED AVIATION DISCUSSION
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.
BEYOND MIDWEEK, FORECAST UNCERTAINTY INCREASES BUT DRY AND
HOTTER WEATHER IS FAVORED.
DISCUSSION...NOW THROUGH THURSDAY
SEASONABLE CONDITIONS ARE
EXPECTED ACROSS THE REGION THROUGH THE WEEKEND. AN UPPER LEVEL
TROUGH OVER NORTHERN BRITISH COLUMBIA WILL SLIP FARTHER SOUTH
TODAY, SUPPORTING AVERAGE TEMPERATURES IN THE UPPERS 70S TO LOW
80S ACROSS THE INLAND VALLEYS AND IN THE LOW TO MID 60S ALONG
THE COAST EACH AFTERNOON. MARINE STRATUS EXPECTED TO REMAIN
CONFINED TO THE COAST, COAST RANGE VALLEYS, AND ALONG THE LOWER
COLUMBIA RIVER FRIDAY. COASTAL LOCATIONS MAY SEE A SHORT PERIOD
OF BROKEN OR SCATTERED CLOUDS THIS AFTERNOON BEFORE STRATUS
REBUILDS EASTWARD. STRATUS IS EXPECTED TO BE MORE WIDESPREAD
TONIGHT INTO SATURDAY MORNING AS THE TROUGH SHIFTS MORE
OVERHEAD. SATURDAY MORNING IS EXPECTED TO START OUT CLOUDY,
EVENTUALLY DISSIPATING BY THE AFTERNOON BUT OVERALL KEEPING THE
TEMPERATURES COOLER.
EXPECT A SHIFT TOWARD WARMER TEMPERATURES TO START NEXT WEEK AS
AN UPPER LEVEL RIDGE AMPLIFIES OVER THE CENTRAL PLAINS.
TEMPERATURES EXPECTED TO JUMP INTO THE MID 80S TO AROUND 90
DEGREES ON MONDAY AND TUESDAY FOR INLAND VALLEYS AND MID 60S TO
AROUND 70 DEGREES ALONG THE COAST. TUESDAY LOOKS LIKE THE
WARMEST DAY NEXT WEEK AND HAS THE HIGHEST AND MOST WIDESPREAD
PROBABILITIES FOR 90 DEGREES. CHANCES ARE 30-40% ALONG THE I-5
CORRIDOR AND AROUND THE PORTLAND METRO WITH LOWER CHANCES OF
15-30% WITHIN THE CASCADE AND COAST RANGE FOOTHILLS. THERE IS
ALSO A LOW (5-15%) CHANCE FOR SOME LOCATIONS AROUND THE CENTRAL
WILLAMETTE VALLEY TO REACH 95 OR GREATER. THE CHANCES FOR MODERATE
HEATRISK REACH 25-50%, HIGHEST IN THE LOWER TUALATIN VALLEY
(BEAVERTON, TIGARD, TUALATIN) AND ADJACENT PORTIONS OF MULTNOMAH
AND CLACKAMAS COUNTIES (PORTLAND, WILSONVILLE, CANBY), WHILE
THE CHANCES OF MAJOR HEATRISK REMAIN LESS THAN 5%.
CONFIDENCE BEGINS TO DROP OFF BY THE MIDDLE OF NEXT WEEK WITH
500 MB CLUSTERS DIVIDED ON WHETHER THE RIDGE REMAINS THE
DOMINANT FEATURE OR IF A TROUGH IS ABLE TO MOVE INTO THE REGION.
THERE IS A 15-20 DEGREE SPREAD IN THE 10TH-90TH PERCENTILE HIGH
TEMPERATURES FOR WEDNESDAY, RANGING FROM THE MID 70S TO MID
90S. AT THIS LEAD TIME AND GIVEN THE UNCERTAINTY, THE CHANCES
FOR MAJOR HEATRISK REACH 10-25% FROM SALEM NORTH TO THE LOWER
COWLITZ VALLEY AND PORTLAND EAST THROUGH THE COLUMBIA GORGE FROM
NEXT WEDNESDAY THROUGH FRIDAY. -19/36
AVIATION
A WEAK UPPER LEVEL TROUGH DIGS SOUTH TOWARDS AIRSPACE,
TURNING THE FLOW ALOFT MORE SOUTHWESTERLY. EXPECT VFR CONDITIONS
TO CONTINUE THROUGH THE TAF PERIOD FOR INLAND TERMINALS. FOR
COASTAL TERMINALS, SATELLITE CONTINUES TO SHOW PATCHY MVFR CLOUDS
SOUTH OF KTMK, WITH MORE PERVASIVE CLOUD COVER AROUND KAST. WILL
NOTE THAT CONDITIONS ARE BEGINNING TO LIFT ALONG THE NORTH COAST
SO WILL SEE SOME IMPROVEMENT OVER THE NEXT FEW HOURS. WEST TO
NORTHWESTERLY WINDS 5-10 KT AT ALL TERMINALS, HIGHEST DURING THE
AFTERNOON. POSSIBLE GUSTS UP TO 20 KT AT A FEW INLAND TERMINALS.
OVERNIGHT, HIGH RESOLUTION MODELS ARE SUGGESTING A RETURN OF MVFR
CIGS TO THE COAST WITH ANOTHER MARINE PUSH. INLAND TOO IS SHOWING
AROUND A 40-60% CHANCE OF MVFR CIGS, WHILE OTHER MODELS ARE
KEEPING AREAS HOVERING RIGHT AROUND 3500 FT. BACK BUILDING OFF OF
THE CASCADES WILL BE THE MAIN DRIVER ON WHETHER WE SEE THE DEEP
STRATUS.
KPDX AND APPROACHES...VFR CONDITIONS WITH A 40-70% CHANCE OF MVFR
CIGS; THOUGH CONFIDENCE IS LOW AS THEY INSTEAD COULD REMAIN JUST
ABOVE 3000 FT. NORTHWESTERLY WINDS AROUND 5-10 KT, WITH GUSTS UP
TO 20 KT POSSIBLE DURING THE AFTERNOON. -27
MARINE
A WEAK COLD FRONT WILL MOVE ACROSS THE WATERS ON
TODAY, ULTIMATELY DISRUPTING THE HIGH PRESSURE AND DECREASING
WINDS ACROSS THE WATERS. HIGH PRESSURE REBUILDS OVER THE
COASTAL WATERS THROUGH THE WEEKEND, RETURNING NORTHERLY WINDS
LATER SATURDAY AND INCREASING PRESSURE GRADIENTS ON SUNDAY.
CHANCES FOR GUSTS UP TO 25 KT RETURN SUNDAY AFTERNOON, MAINLY
ACROSS THE CENTRAL AND SOUTHERN WATERS OUT TO 30-40 NM. SEAS
ARE EXPECTED TO REMAIN AROUND 4 TO 6 FT AS RELATIVELY BENIGN
CONDITIONS PERSIST THROUGH THE WEEKEND AND INTO THE START OF
NEXT WEEK. -19/DH
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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