918
FXUS66 KPQR 071757 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
1056 AM PDT FRI AUG 7 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. PRECIPITATION IS NOT EXPECTED DURING THE
NEXT WEEK ACROSS THE AREA.
DISCUSSION...TODAY THROUGH THURSDAY
THE UPPER LEVEL RIDGE AXIS
CONTINUES TO SHIFT EAST TODAY, WITH BROADENING OF THE RIDGE
EVENTUALLY FLATTENING OUT OVER THE WEEKEND. THIS WILL LEAD TO A
GRADUAL COOLING TREND TO NEAR NORMAL AUGUST TEMPERATURES BY SUNDAY.
ANOTHER STRONG PUSH OF ONSHORE WINDS LATER THIS AFTERNOON WILL
CONTINUE TO SCOUR OUT THE SMOKE AND HAZE IN THE AREA.
HIGH TEMPERATURES TODAY REMAIN ON THE WARMER SIDE, REACHING INTO THE
MID TO UPPER 80S INLAND, WITH A FEW LOCATIONS POTENTIALLY REACHING
90 DEGREES. STRATUS ALONG THE COAST SHOULD SCATTER OUT IN THE
AFTERNOON BEFORE THE NEXT MARINE PUSH OCCURS. A SHORTWAVE TROUGH
APPROACHING THE COAST EARLY SATURDAY WILL LIKELY DEEPEN THE MARINE
LAYER ENOUGH TO PUSH CLOUDS INLAND UP THE LOWER COLUMBIA RIVER
VALLEY INTO THE PORTLAND METRO. AFTERNOON SUN SHOULD ALLOW TEMPS TO
WARM AGAIN INTO THE MID TO UPPER 80S ACROSS THE INTERIOR LOWLANDS.
THERE IS HIGH CONFIDENCE TEMPERATURES TREND INTO THE LOWER TO MID
80S SUNDAY THROUGH EARLY NEXT WEEK AS A MORE ZONAL FLOW PATTERN
EMERGES. STILL NO RAINFALL CHANCES IN THE NEXT WEEK AS WE HEAD INTO
THE MIDDLE OF AUGUST. /DH
AVIATION...THROUGH 18Z SAT
WEST TO SOUTHWEST FLOW ALOFT
CONTINUES THROUGH THE PERIOD AS HIGH PRESSURE REMAINS OVER THE
REGION. MARINE STRATUS CONTINUES TO DETERIORATE ALONG THE COAST
AND LOWER COLUMBIA RIVER ACCORDING TO SATELLITE IMAGERY AS OF
1730Z FRI. WHILE INLAND TERMINALS WILL KEEP VFR THROUGH THE TAF
PERIOD, THERE IS LESS CONFIDENCE FOR IMPROVEMENT TO VFR FOR
COASTAL TERMINALS. PROBABILISTIC GUIDANCE SUGGESTS THE BEST
CHANCES OF IMPROVEMENT TO VFR OCCURRING BETWEEN 21Z FRI AND 03Z
SAT (50-70% CHANCE OF VFR CIGS). OTHERWISE, COASTAL TERMINALS WILL
MAINTAIN MVFR/IFR CONDITIONS THROUGH THE PERIOD, WITH A 50-60%
CHANCE OF MVFR, 40-50% CHANCE OF IFR, AND 20-30% CHANCE OF LIFR.
MARINE STRATUS IS EXPECTED TO REDEVELOP AT THE COAST BY 03Z
SAT, GIVING MORE CONFIDENCE FOR DETERIORATED CONDITIONS BY THEN.
LIGHT NORTHWESTERLY WINDS INCREASE TO AROUND 5-10 KT LATER THIS
AFTERNOON FOR ALL TERMINALS, EARLIEST ALONG THE COAST.
KPDX AND APPROACHES...VFR CONDITIONS WITH CLEAR SKIES THROUGH
PERIOD. LIGHT NORTHWEST WINDS INCREASE TO AROUND 6-8 KT THIS
AFTERNOON.
~12
MARINE
HIGH PRESSURE OFFSHORE WILL MAINTAIN NORTHERLY WINDS
THROUGH THE WEEKEND AND INTO NEXT WEEK. WINDS ARE EXPECTED TO
REMAIN 20 KT OR LESS TODAY THROUGH SATURDAY MORNING. BY SAT
AFTERNOON, SURFACE PRESSURE GRADIENTS ARE EXPECTED TO TIGHTEN AS
AN INVERTED SURFACE THERMAL TROUGH STRENGTHENS OVER NORTHERN
CALIFORNIA TOWARD THE SOUTH OREGON COAST. THIS WILL BRING
INCREASING CHANCES FOR WIND GUSTS UP TO 25 KT SOUTH OF CAPE
FOULWEATHER OVER THE WEEKEND AND INTO EARLY NEXT WEEK. GENERALLY
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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