029
FXUS66 KPQR 081754 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
1054 AM PDT SAT AUG 8 2026
UPDATED AVIATION DISCUSSION...
SYNOPSIS
WARM AND DRY CONDITIONS CONTINUE TODAY, BUT TEMPERATURES
ARE EXPECTED TO GRADUALLY MODERATE TOWARD AUGUST NORMS BY SUNDAY,
CONTINUING INTO EARLY NEXT WEEK. 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 ARE
LIKELY TO TREND WARMER AGAIN LATE NEXT WEEK.
DISCUSSION...TODAY THROUGH FRIDAY
BROAD HIGH PRESSURE OVER THE
REGION TODAY WILL MAINTAIN WARM AND DRY CONDITIONS WITH HIGHS
REACHING THE MID TO UPPER 80S INLAND. A WEAK SHORTWAVE TROUGH WILL
BRING A FEW HIGH CLOUDS ACROSS THE AREA THIS MORNING WHILE MARINE
STRATUS LIKELY REMAINS AT THE COAST, WITH AFTERNOON SUN EXPECTED.
ANOTHER ROUND OF ONSHORE FLOW WILL BRING BREEZY NORTHWEST WINDS
LATER THIS AFTERNOON AND EVENING.
WHILE WINDS FROM THE WEST/NORTHWEST GENERALLY REMAIN 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 UP TO 30-35 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. 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.
THERE IS HIGH CONFIDENCE TEMPERATURES TREND A FEW DEGREES COOLER
INTO THE LOW TO MID 80S SUNDAY THROUGH EARLY NEXT WEEK AS A MORE
ZONAL FLOW PATTERN EMERGES. MAJORITY OF ENSEMBLE MEMBERS SHOW A WEAK
TROUGH APPROACHING THE PACIFIC NORTHWEST MIDDLE OF NEXT WEEK,
HOWEVER, IT APPEARS TO BE A DRY TROUGH WITH NO PRECIPITATION CHANCES
EXPECTED. ENSEMBLE CLUSTERS INDICATE INCREASING PROBABILITIES FOR A
STEEPER RIDGE DEVELOPING OFFSHORE LATE NEXT WEEK, WHICH WOULD ALLOW
FOR TEMPERATURES TO WARM AGAIN INTO THE UPPER 80S TO LOWER 90S
POTENTIALLY. DH/10
AVIATION...THROUGH 18Z SUN
FLOW ALOFT SHIFTS WESTERLY TODAY AS
HIGH PRESSURE WEAKENS OVER THE REGION. AS OF 17Z SAT, WIDESPREAD
VFR CONDITIONS AS MARINE STRATUS HAS FINALLY CLEARED OUT OF THE
COASTAL TERMINALS. INLAND TERMINALS WILL CONTINUE TO SEE VFR
CONDITIONS THROUGH THE PERIOD, WHILE COASTAL TERMINALS WILL AGAIN
SEE DETERIORATED CONDITIONS BY 04-10Z SUN. PROBABILISTIC GUIDANCE
SUGGESTS INCREASING CHANCES THROUGH THE LATTER HALF OF THE
PERIOD, WITH CHANCES BETWEEN 06-12Z SUN AROUND 30-50% FOR MVFR
CIGS, 30-40% FOR IFR CIGS, AND 10-20% FOR LIFR CIGS, THEN BETWEEN
12-18Z SUN AROUND 50-80% FOR MVFR CIGS, 40-60% FOR IFR CIGS, AND
10-40% FOR LIFR CIGS. HIGHER TO LOWER END CHANCES FROM KONP TO
KAST. IN SHORT, CONFIDENCE FOR DETERIORATED CONDITIONS AT COASTAL
TERMINALS WILL INCREASE BETWEEN 06-12Z SUN.
OTHERWISE, NORTHWESTERLY WINDS INCREASE AGAIN TO 6-12 KT THIS
AFTERNOON. KONP AND A FEW INLAND TERMINALS MAY SEE GUSTS UP TO 20
KT AFTER 18Z SAT, DECREASING BY 04-07Z SUN.
KPDX AND APPROACHES...VFR CONDITIONS THROUGH PERIOD. LIGHT
NORTHWEST WINDS INCREASE TO AROUND 9-12 KT AFTER 21Z SAT, WITH
GUSTS UP TO 20 KT POSSIBLE. WINDS WILL THEN DECREASE AROUND 07-09Z
SUN. ~12
MARINE
HIGH PRESSURE OFFSHORE WILL MAINTAIN NORTHERLY WINDS
THROUGH THE WEEKEND AND INTO NEXT WEEK. WINDS WILL REMAIN 20 KT
OR LESS THROUGH THIS MORNING. SURFACE PRESSURE GRADIENTS WILL
THEN TIGHTEN 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 IS A 40% CHANCE FOR
SMALL CRAFT WIND GUSTS TODAY SOUTH OF CAPE FOULWEATHER, THEN
INCREASED CHANCES OF 50-70% ON SUNDAY. WIND DRIVEN SEAS ARE
EXPECTED TO REMAIN AROUND 4 TO 6 FT THROUGH THE NEXT WEEK. /DH
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
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