824
FXUS66 KPQR 062120
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
220 PM PDT THU AUG 6 2026
SYNOPSIS
WARM AND DRY CONDITIONS CONTINUE THROUGH TOMORROW
AS HIGH PRESSURE SLOWLY LOSES CONTROL OF THE REGION. STILL
EXPECTING UPPER 80S TO AROUND 90 DEGREES TOMORROW, YIELDING
MODERATE HEATRISK FOR MOST LOWLAND LOCATIONS. TEMPERATURES
MODERATE OVER THE WEEKEND WITH RENEWED ONSHORE FLOW KEEPING
SMOKE PINNED EAST OF THE CASCADE CRESTS. NEAR NORMAL SUMMERTIME
WEATHER CONDITIONS ARE ANTICIPATED MONDAY THROUGH THE MIDDLE
NEXT WEEK. NO PRECIPITATION EXPECTED DURING THE NEXT 7 DAYS
ACROSS NORTHWEST OR OR SOUTHWEST WA.
DISCUSSION...TONIGHT THROUGH WEDNESDAY
THE LATEST
OBSERVATIONS ACROSS THE AREA INDICATE LOWLAND TEMPERATURES
WARMING INTO THE 80S FOR MOST LOCATIONS WITH MOSTLY CLEAR
SKIES. SATELLITE IMAGERY DEPICTS SMOKE LINGERING OVER MOST
LOCATIONS OUTSIDE OF THE COASTAL AREAS. EASTERLY WINDS HAVE
SHIFTED MORE WEST TO NORTHWESTERLY AS THE UPPER LEVEL TROUGH
AXIS SHIFTS EAST TOWARD THE GREAT BASIN. THIS HAS HELPED STOP
SMOKE FROM EASTERN WILDFIRES FROM SPREADING INTO NW OR AND SW
WA. TEMPERATURES EXPECTED TO REMAIN WARM WITH HIGHS IN THE UPPER
80S TO LOW 90S EXPECTED FOR INTERIOR LOWLANDS AND 60S ALONG THE
COAST. A HEAT ADVISORY REMAINS IN EFFECT ACROSS THE INLAND
VALLEYS THROUGH THIS EVENING HIGHLIGHTING THE INCREASED RISK OF
HEAT-RELATED ILLNESSES. IN AREAS WITH AIR QUALITY ADVISORIES IN
EFFECT, IT IS RECOMMENDED TO KEEP WINDOWS AND DOOR SHUT TO
PREVENT SMOKE FROM GOING INDOORS. SOMETHING AS SIMPLE AS A LARGE
BOX FAN WITH A DAMP TOWEL DRAPED OVER THE FRONT OF IT CAN
PROVIDE EFFECTIVE COOLING GIVEN THE DRY AIRMASS IN PLACE TODAY
IF YOU'RE SEEKING SOME ALTERNATIVE MEANS OF RELIEF.
SMOKE IS EXPECTED TO LINGER INTO FRIDAY BUT INCREASING ONSHORE
FLOW IS EXPECTED TO ADVECT CLEANER AIR IN FROM THE NORTHWEST.
SMOKE CONCERNS WILL CONTINUE TO TREND LOWER EXCEPT NEAR ONGOING
WILDFIRES WHICH WILL PERSIST AS CREWS CONTINUE TO WORK ON
PUTTING THEM OUT. THE UPPER LEVEL RIDGE WILL CONTINUE TO LOOSEN
ITS GRIP OVER THE PACNW AS IT SHIFTS FARTHER EAST, SUPPORTING
GRADUALLY LOWER HIGH TEMPERATURES INTO NEXT WEEK. FRIDAY IS
STILL EXPECTED TO BE ON THE WARMER SIDE WITH HIGHS IN THE UPPER
80S TO AROUND 90 ACROSS THE INTERIOR LOWLANDS. SATURDAY TEMPS
COOL A COUPLE DEGREES INTO THE MID TO UPPER 80S AND FURTHER ON
SUNDAY INTO THE LOW AND MID 80S. TEMPS ALONG THE COAST ARE
EXPECTED TO STAY STEADY IN THE 60S EACH AFTERNOON. MARINE
STRATUS IS EXPECTED TO INFLUENCE THE COAST EACH NIGHT AND EARLY
MORNING WITH LOW CHANCES FOR STRATUS TO PUSH PAST THE COAST
RANGE EACH NIGHT. IF YOU'RE SEARCHING FOR ANY RAINFALL CHANCES
HEADED THROUGH THE MIDDLE TO END OF NEXT WEEK YOU'RE LIKELY OUT
OF LUCK AS THERE ARE NO SIGNS OF ANY APPRECIABLE PRECIPITATION
FOR WESTERN OR AND SOUTHWESTERN WA HEADED INTO THE MIDDLE OF
AUGUST. -19
AVIATION...THROUGH 00Z FRI
SATELLITE IMAGERY AND TERMINAL
OBSERVATIONS AS OF EARLY THURSDAY AFTERNOON DEPICTS IFR/MVFR
STRATUS ALONG THE COAST WITH HAZY SKIES FROM WILDFIRE SMOKE ACROSS
THE WILLAMETTE VALLEY. MARINE STRATUS CONTINUES TO DISSIPATE,
FAVORING A BRIEF IMPROVEMENT TO VFR AT KAST BETWEEN 21Z THU-00Z
FRI. FURTHER SOUTH TOWARD KONP, HIGH CONFIDENCE FOR IFR STRATUS
HOLDING ON ALL DAY. TONIGHT, IFR STRATUS RETURNS TO KAST AS LOW
LEVEL CONDITIONS MOISTEN.
LIGHT NORTHWESTERLY WINDS HAVE HELPED CLEAR OUT THE SMOKE FROM
KPDX, BUT SMOKE CONTINUES TO LINGER ACROSS THE OTHER VALLEY
TERMINALS AND BRINGING VIS REDUCTIONS OF 3-4 SM. NORTHWESTERLY
WINDS WILL CONTINUE TO GRADUALLY PUSH SMOKE EASTWARD TODAY,
GRADUALLY IMPROVING VIS BACK TO VFR AFTER 00Z FRI. VFR CONDITIONS
PREVAIL FOR THE REST OF THE TAF PERIOD FOR VALLEY TERMINALS.
KPDX AND APPROACHES...VFR CONDITIONS AT KPDX WHILE EAST METRO
LOCATIONS INCLUDING KTTD REMAIN IN 4SM VIS DUE TO WILDFIRE SMOKE.
GRADUAL IMPROVEMENT IN VIS EXPECTED THROUGH THIS EVENING AS SMOKE
GETS PUSHED EASTWARD FROM NORTHWESTERLY WINDS. VFR THROUGH THE
REST OF THE TAF PERIOD. -10
MARINE
HIGH PRESSURE AT THE SURFACE OVER THE EASTERN PACIFIC
KEEPS NORTHERLY WINDS IN PLACE THE REMAINDER OF THE WEEK THROUGH
THE WEEKEND AND INTO NEXT WEEK AS WELL. CONFIDENCE IS MODERATE TO
HIGH BOTH SEAS AND WINDS REMAIN BELOW SMALL CRAFT CRITERIA
THROUGH TODAY AND FRIDAY. HOWEVER, WINDS INCREASE LATER ON
SATURDAY WITH THE NBM PROJECTING A 40-70% CHANCE FOR AT LEAST
ISOLATED WIND GUSTS UP TO 25 KT SATURDAY EVENING. SIMILAR
PROBABILITIES ARE PRESENT DURING THE AFTERNOON/EVENING HOURS INTO
EARLY NEXT WEEK SO SMALL CRAFT ADVISORIES MAY BE NEEDED YET AGAIN,
MAINLY ACROSS THE OUTER WATERS. SEAS HOLD AROUND 4-7 FEET AT 7-8
SECONDS OVER THE NEXT 5-7 DAYS. -99/10
PQR WATCHES/WARNINGS/ADVISORIES
OR...HEAT ADVISORY UNTIL 11 PM PDT THIS EVENING FOR ORZ108>118.
WA...HEAT ADVISORY UNTIL 11 PM PDT THIS EVENING FOR WAZ204>208.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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