370
FXUS66 KPQR 090447 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
947 PM PDT SAT AUG 8 2026
..UPDATED AVIATION DISCUSSION
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 TREND WARMER TOWARDS THE
LATTER PART OF THE UPCOMING WEEK.
DISCUSSION...TONIGHT THROUGH FRIDAY
ZONAL FLOW ALOFT WITH
WEST/NORTHWEST WINDS AT THE SURFACE WILL HELP TO SUPPORT NEAR TO
SLIGHTLY WARMER THAN NORMAL DAYTIME HIGHS THROUGH THE WEEKEND
AND INTO AT LEAST THE MIDDLE OF NEXT WEEK. TOWARDS THURSDAY,
A MAJORITY OF ENSEMBLE MEMBERS ARE SHOWING A WEAK TROUGH DROPPING
DOWN OUT OF BRITISH COLUMBIA, WHICH LOOKS TO BRING RELATIVELY
COOLER TEMPERATURES INTO THE REGION. HOWEVER, SAID SYSTEM LOOKS
TO BE DRY WITH NO PRECIPITATION EXPECTED. LOOKING TOWARDS THE
END OF NEXT WEEK AND INTO THE FOLLOWING WEEKEND, ENSEMBLE
CLUSTERS INDICATE INCREASING PROBABILITIES FOR A STEEPER RIDGE
DEVELOPING OFFSHORE, WHICH WOULD ALLOW FOR TEMPERATURES TO WARM
AGAIN INTO THE UPPER 80S TO LOWER 90S POTENTIALLY.
THROUGH THE FORECAST PERIOD EXPECT WINDS FROM THE WEST/NORTHWEST
AROUND 15 MPH OR WEAKER ACROSS MOST AREAS, THE BREEZIEST
LOCATIONS WILL BE ALONG THE CENTRAL COLUMBIA RIVER GORGE AND
PORTIONS OF THE UPPER HOOD RIVER VALLEY WHERE GAP WINDS ARE
FORECAST TO GUST APPROACHING 35 MPH, WITH A 20-30% CHANCE FOR
GUSTS EXCEEDING 40 MPH. COMBINED WITH LOW RELATIVE HUMIDITY AND
DRY FUELS, THESE CONDITIONS WOULD BE FAVORABLE FOR RAPID FIRE
SPREAD. IT SHOULD BE NOTED THAT NWS PENDLETON HAS ISSUED A RED
FLAG WARNING FOR THE CENTRAL GORGE AND PORTIONS OF EASTERN HOOD
RIVER COUNTY, IN EFFECT THROUGH 11 PM SATURDAY. ELSEWHERE ACROSS
NORTHWEST OREGON AND SOUTHWEST WASHINGTON, HIGHER RELATIVE
HUMIDITY AND WEAKER WINDS WILL NOT BE FAVORABLE FOR RAPID FIRE
SPREAD. /42-DH
AVIATION...THROUGH 06Z MON
SATELLITE IMAGERY AS OF LATE
SATURDAY EVENING DEPICTS MARINE STRATUS RE-DEVELOPING ALONG THE
COAST. HIGH CONFIDENCE FOR IFR/MVFR CIGS AFTER 06-08Z SUN FOR
COASTAL TERMINALS DUE TO THIS STRATUS AND LASTING THROUGH 18-21Z
SUN. BETWEEN 21Z SUN-03Z MON, THERE IS ABOUT A 50-70% CHANCE AT ANY
GIVEN HOUR FOR MARINE STRATUS TO BREAK OUT AND BRIEFLY IMPROVE
CONDITIONS ALONG THE COAST TO VFR. LOW MARINE STRATUS RETURNS SUNDAY
EVENING. FOR WILLAMETTE VALLEY TERMINALS, PREDOMINATELY VFR WITH
CLEAR SKIES THROUGH THE TAF PERIOD. NORTHWESTERLY ACROSS ALL
TERMINALS, STRONGEST IN THE AFTERNOON WITH GUSTS UP TO 25 KT ALONG
THE COAST AND UP TO 18-20 KT ACROSS THE VALLEY.
KPDX AND APPROACHES...VFR THROUGH THE TAF PERIOD WITH CLEAR SKIES.
10-20% CHANCE FOR STRATUS DEVELOPMENT IN THE FAR EASTERN PORTLAND
METRO AT ANY GIVEN HOUR BETWEEN 12-17Z SUN. NORTHWESTERLY WINDS
AROUND 5 KT TONIGHT, STRENGTHENING TO 10-11 KT IN THE AFTERNOON WITH
GUSTS UP TO 19-20 KT. -10
MARINE
HIGH PRESSURE OFFSHORE WILL MAINTAIN NORTHERLY WINDS
THROUGH THE WEEKEND AND INTO NEXT WEEK. SURFACE PRESSURE
GRADIENTS HAVE TIGHTENED THIS AFTERNOON, BRINGING INCREASED
CHANCES FOR WIND GUSTS UP TO 25 KT SOUTH OF CAPE FOULWEATHER
THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK. SPECIFICALLY, THERE
REMAINS A 40% CHANCE FOR SMALL CRAFT WIND GUSTS TODAY SOUTH OF
CAPE FOULWEATHER, THEN A 60-80% CHANCE ON SUNDAY. 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 THE WEEKEND AND MOST OF NEXT WEEK.
~12/DH
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM NOON SUNDAY TO 2 AM PDT MONDAY FOR
PZZ253.
SMALL CRAFT ADVISORY FROM 3 PM SUNDAY TO 2 AM PDT MONDAY FOR
PZZ273.
WWW.WEATHER.GOV/PORTLAND
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X.COM/NWSPORTLAND
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