142
FXUS66 KPQR 090923
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
222 AM PDT SUN AUG 9 2026
SYNOPSIS
WARM AND DRY CONDITIONS CONTINUE THROUGH THE UPCOMING
WEEK AS TEMPERATURES GRADUALLY MODERATE TOWARDS AUGUST NORMALS.
RENEWED ONSHORE FLOW WILL KEEP SMOKE EAST OF THE CASCADES,
WHILE PRECIPITATION CHANCES REMAIN VERY LOW THROUGH AT LEAST THE
MIDDLE OF NEXT WEEK. TEMPERATURES MAY TREND WARMER LATER NEXT WEEK.
DISCUSSION...TODAY THROUGH SATURDAY
AFTER 5 CONSECUTIVE DAYS OF
90 DEGREE WEATHER, EXPECT TEMPERATURES TO COOL ABOUT 4-7 DEGREES AS
NEAR AVERAGE CONDITIONS ARE EXPECTED TODAY WITH HIGHS REACHING INTO
THE LOWER TO MID-80S. THE SYNOPTIC FLOW ALOFT BECOMES PREDOMINATELY
ZONAL OVER THE REGION TODAY INTO EARLY NEXT WEEK. AN EMBEDDED
SHORTWAVE TROUGH WILL USHER IN ANOTHER ROUND OF ENHANCED ONSHORE
FLOW LATER THIS AFTERNOON, WITH BREEZY NORTHWEST WINDS CONTINUING
THROUGH THIS EVENING. SUNNY SKIES EXPECTED INLAND WHILE MARINE
STRATUS EBBS AND FLOWS NEAR THE COAST. THIS PATTERN GENERALLY
REMAINS IN PLACE THROUGH TUESDAY.
BY WEDNESDAY, ENSEMBLES ARE SHOWING A GENERAL TREND TOWARD UPPER
LEVEL TROUGHING DROPPING OUT OF BRITISH COLUMBIA, THOUGH CHANCES FOR
RAIN HERE REMAIN VERY LOW (BELOW 5%). THIS COULD BRING IN SOME
COOLER TEMPERATURES BY MID-WEEK, AS INDICATED BY GROWING UNCERTAINTY
IN THE POTENTIAL HIGH TEMPERATURES INTO LATE NEXT WEEK. FOR EXAMPLE,
THE SPREAD BETWEEN THE 10TH AND 90TH PERCENTILES ON FRIDAY AT PDX
RANGE BETWEEN 81 AND 96 DEGREES. THAT IS BECAUSE ENSEMBLES ARE SPLIT
BETWEEN UPPER LEVEL RIDGING POSSIBLY DEVELOPING OFFSHORE, WHILE
OTHERS SHOW SOME SORT OF TROUGHING PERSISTING OVER THE AREA. /DH
AVIATION...THROUGH 12Z MON
WESTERLY FLOW ALOFT CONTINUES TODAY
WITH PREDOMINATELY VFR CONDITIONS AND MOSTLY CLEAR SKIES EXPECTED
INLAND ACROSS THE WILLAMETTE VALLEY. SHALLOW MARINE STRATUS HAS
DEVELOPED ALONG THE COAST WITH IFR TO LOW-END MVFR CIGS AT COASTAL
TERMINALS. CONDITIONS ARE LIKELY (70-80% CHANCE) TO IMPROVE TO
VFR AT KONP AFTER 18Z SUNDAY WHILE CHANCES FOR IMPROVEMENT AT KAST
THIS AFTERNOON IS LOWER (40-50%). CHANCES FOR MARINE STRATUS
REDEVELOPING AT THE COAST INCREASES AGAIN BY 03-04Z MONDAY.
NORTH TO NORTHWEST WINDS INCREASE AGAIN THIS AFTERNOON WITH GUSTS
UP TO 25 KT ALONG THE COAST AND UP TO 20 KT INLAND.
KPDX AND APPROACHES...VFR THROUGH THE TAF PERIOD WITH CLEAR
SKIES. THERE IS A 10-20% CHANCE FOR STRATUS TO DEVELOP IN THE
PORTLAND METRO BETWEEN 12-17Z SUNDAY. NORTHWEST WINDS INCREASE TO
AROUND 10-12 KT IN THE AFTERNOON WITH GUSTS UP TO 20 KT. /DH
MARINE
HIGH PRESSURE OFFSHORE WILL MAINTAIN NORTHERLY WINDS
THROUGH MUCH OF NEXT WEEK. SURFACE PRESSURE GRADIENTS TIGHTEN
THIS AFTERNOON, BRINGING HIGH CHANCES FOR WIND GUSTS UP TO 25 KT
SOUTH OF CAPE FOULWEATHER TODAY AND INTO EARLY NEXT WEEK. AS A
RESULT, A SMALL CRAFT ADVISORY HAS BEEN ISSUED FOR THE INNER AND
OUTER WATERS SOUTH OF CAPE FOULWEATHER FROM 12 PM SUNDAY TO 2 AM
MONDAY. SIMILAR SMALL CRAFT CONDITIONS MAY REOCCUR MONDAY FOR THE
WATERS SOUTH OF CAPE FOULWEATHER. WIND DRIVEN SEAS ARE EXPECTED TO
REMAIN AROUND 4 TO 6 FT THROUGH MOST OF NEXT WEEK. /DH
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM NOON TODAY TO 2 AM PDT MONDAY FOR
PZZ253-273.
WWW.WEATHER.GOV/PORTLAND
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