745
FXUS66 KPQR 070448 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
948 PM PDT THU AUG 6 2026
..UPDATED AVIATION DISCUSSION
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 06Z FRI
SATELLITE IMAGERY AND TERMINAL
OBSERVATIONS AS OF LATE THURSDAY EVENING DEPICTS SMOKE BEGINNING TO
CLEAR OUT OF THE AREA AS WEST/NORTHWEST WINDS ALOFT PUSH SMOKE
EASTWARD. STILL EXPECTING SOME THIN SMOKE/HAZE, BUT IT DOESN'T
APPEAR TO BE THICK ENOUGH TO CAUSE VIS REDUCTIONS OF 5SM OR LOWER.
EXPECT VFR CONDITIONS THROUGHOUT THE TAF PERIOD FOR WILLAMETTE
VALLEY TERMINALS. MEANWHILE, MARINE STRATUS HAS RETURNED TO THE
COAST. HIGH CONFIDENCE FOR LIFR/IFR CONDITIONS THROUGH AT LEAST 18-
19Z FRI ALONG THE COAST FROM THIS STRATUS AS HIGH PRESSURE KEEPS THE
CLOUDS LOW. 40-50% CHANCE AT ANY GIVEN HOUR BETWEEN 19Z FRI-00Z SAT
FOR COASTAL TERMINALS TO BRIEFLY IMPROVE TO VFR BEFORE MARINE
STRATUS RE-DEVELOPS IN THE EVENING. WEST/NORTHWESTERLY WINDS UNDER
10 KT THROUGH THE TAF PERIOD FOR ALL TERMINALS.
KPDX AND APPROACHES...PREDOMINATELY VFR CONDITIONS THROUGH THE TAF
PERIOD. EXPECT SOME LINGERING HAZE/SMOKE IN THE VICINITY, BUT LIGHT
NORTHWESTERLY WINDS AROUND 5 KT WILL HELP MAINTAIN VFR VIS/CIGS AT
KPDX. -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
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