223
FXUS66 KPQR 031008
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
308 AM PDT FRI JUL 3 2026
SYNOPSIS
ONSHORE FLOW CONTINUES OVER THE NEXT WEEK. NEAR
ZONAL FLOW ALOFT IS EXPECTED THROUGH SUNDAY WILL SLOWLY BECOME
SOUTHWESTERLY BY THE START OF THE WEEK AS HIGH PRESSURE STARTS
TO BUILD OVER THE GREAT BASIN THROUGH THE WEEKEND. THIS PATTERN
WILL BRING WARMER TEMPERATURES AND A GOOD DEAL OF SUNSHINE
DURING PEAK HEATING HOURS EACH DAY. MOST INLAND VALLEYS WILL
WARM INTO THE LOW TO MID 80S EACH DAY, WITH THE WARMEST DAY
LOOKING TO OCCUR ON MONDAY. ONSHORE FLOW WILL KEEP THE COAST
COOLER WITH HIGHS IN THE 60S.
DISCUSSION...TODAY THROUGH THURSDAY
MINIMAL CHANGES IN THE
OVERALL PATTERN EXPECTED THROUGH THE WEEKEND AND INTO THE MIDDLE
OF NEXT WEEK. OUR CWA WILL BE SANDWICHED IN-BETWEEN AN EXITING
UPPER LEVEL TROUGH WITHIN CANADA AND A SLOWLY BUILDING UPPER
LEVEL HIGH OVER THE GREAT BASIN. THIS SYNOPTIC PATTERN IS
RESULTING IN ZONAL FLOW OVER THE REGION. THE GREAT BASIN HIGH
WILL SLOWLY BECOME MORE DOMINANT THROUGH THE LATTER PART OF THE
WEEKEND AND INTO THE START OF NEXT WEEK. HOWEVER, EVEN AS THE
GREAT BASIN HIGH DEVELOPS, ONSHORE FLOW WILL PERSIST AND THAT
WILL HELP TO MAINTAIN NORMAL TO SLIGHTLY WARMER THAN NORMAL
DAYTIME HIGHS ACROSS THE FORECAST AREA. OF NOTE, NORMALS FOR
THIS TIME OF YEAR ARE TYPICALLY IN THE UPPER 70S TO MID 80S,
WITH COOLER TEMPERATURES, WITHIN THE AFOREMENTIONED RANGE ALONG
THE COAST.
ENSEMBLE GUIDANCE IS IN AGREEMENT THAT RIDGING BUILDING OVER
THE GREAT BASIN WILL PUSH SLIGHTLY NORTHWEST INTO NW OR AND SW
WA BY MONDAY. THIS WILL RESULT IN MONDAY LOOKING TO BE THE
WARMEST DAY OF THE UPCOMING WEEK WITH DAYTIME HIGHS IN THE MID
TO UPPER 80S FOR THE INTERIOR LOWLANDS WITH A 10-35% CHANCE OF
TEMPERATURES REACHING 90 DEGREES BETWEEN VANCOUVER, WA AND
EUGENE, OR. DAYTIME HIGHS ALONG THE COAST ARE EXPECTED TO BE
ABOUT 10-15 DEGREES COOLER (UPPER 60S TO MID 70S) ALONG WITH
DAYTIME HIGHS FOR THE CASCADES ABOUT 5-10 DEGREES COOLER (MID
70S TO MID 80S).
AS TUESDAY APPROACHES, THE REGION IN FOR ANOTHER PATTERN CHANCE
AS ENSEMBLE GUIDANCE REMAINS IN AGREEMENT THAT A BROAD, ALASKAN
LOW WILL SLOWLY MOVE EAST INTO BRITISH COLUMBIA. THIS WILL
UNSEAT THE GREAT BASIN HIGH, THUS BRINGING DAYTIME HIGHS MUCH
CLOSER TO SEASONAL NORMALS ACROSS THE CWA. TEMPERATURES ARE
SLATED TO REMAIN IN THE LOW 80S FROM TUESDAY, WITH COOLER
TEMPERATURES ALONG THE COAST, THROUGH THE END OF NEXT WEEK WITH
LESS THAN 5% CHANCE OF TEMPERATURES REACHING 90 DEGREES.
IT IS IMPORTANT TO REMEMBER THAT WHILE TEMPERATURES WILL BE
WARMING UP FOR THE HOLIDAY WEEKEND AND NEXT WEEK, MANY LOCAL
LAKES AND RIVERS REMAIN VERY COLD AND CAN CAUSE COLD WATER
SHOCK. ALSO, RIVERS MAY STILL HAVE SWIFT CURRENTS IN SOME AREAS,
WHICH CAN QUICKLY SWEEP YOU AWAY. PLEASE PRACTICE WATER SAFETY
BY WEARING LIFE JACKETS, VISITING WITH A BUDDY, AND ALWAYS BEING
AWARE OF YOUR SURROUNDINGS. /42-03
AVIATION
SATELLITE IMAGERY AND TERMINAL OBSERVATIONS SHOW
WIDESPREAD MARINE STRATUS ALONG THE COAST BRINGING MVFR TO LIFR
CONDITIONS. MEANWHILE, INLAND LOCATIONS ARE MAINTAINING VFR
CONDITIONS BETWEEN FL035 TO FL050, WITH A 10-30% CHANCE OF MVFR
CONDITIONS FROM 13Z-17Z FRIDAY. COASTAL LOCATIONS ARE EXPECTED TO
MAINTAIN MVFR TO LIFR CONDITIONS IMPROVING TOWARDS VFR AROUND
18Z-20Z FRIDAY. INLAND LOCATIONS ARE EXPECTED TO IMPROVE WITH
CIGS EXPECTED TO LIFT ABOVE FL050 AROUND 18Z-20Z FRIDAY.
MARINE STRATUS IS EXPECTED TO RETURN TOWARDS 04Z-08Z SATURDAY AND
WILL BRING ANOTHER ROUND OF IFR/LIFR CONDITIONS TO THE COAST AND
VFR CONDITIONS BETWEEN FL035 TO FL050 FOR INLAND LOCATIONS ONCE
AGAIN. LIGHT AND VARIABLE WINDS UNDER 5 KT THROUGH 15Z-18Z FRIDAY
AT ANY GIVEN TERMINAL, BECOMING NORTHWESTERLY IN THE AFTERNOON AND
REMAINING UNDER 10 KT.
KPDX AND APPROACHES...VFR CONDITIONS BETWEEN FL035 TO FL050
EXPECTED, WITH CIGS LIFTING ABOVE FL050 AROUND 18Z FRIDAY. LIGHT
AND VARIABLE WINDS UNDER 5 KT THROUGH 15Z-18Z FRIDAY AT ANY GIVEN
TERMINAL, BECOMING NORTHWESTERLY IN THE AFTERNOON AND REMAINING
UNDER 10 KT.
MARINE
CURRENT SEAS OF 4 TO 6 FT AND NORTHERLY WINDS AROUND 5
TO 10 KT WILL CONTINUE THROUGH TODAY. NORTH/NORTHWESTERLY WINDS
INCREASE THIS AFTERNOON TO AROUND 10 TO 15 KT, STRONGEST TO THE
SOUTH OF CAPE FOULWEATHER WHERE GUSTS UP TO 20 KT ARE EXPECTED
LATE IN THE DAY.
SATURDAY AND SUNDAY, A THERMALLY INDUCED SURFACE TROUGH DEVELOPS
ALONG THE COAST, WHICH WILL RESULT IN NORTHERLY WINDS INCREASING
NORTHWARD, IMPACTING ALL WATERS WITH GUSTS UP TO 30 KT. IN ADDITION
SEAS WILL ALSO REACT TO THE INCREASING WINDS THUS BUILDING
TOWARDS 5 TO 8 FT BY SATURDAY NIGHT/SUNDAY. IN RESPONSE TO
EXPECTED GUSTY WINDS, SMALL CRAFT ADVISORIES HAVE BEEN ISSUED
ACROSS ALL WATERS AS GUSTS ARE EXPECTED TO BUILD TOWARDS 25-30 KT
WITH HIGHEST WIND GUSTS EXPECTED IN ZONES PZZ253 AND PZZ273. SMALL
CRAFT CONDITIONS ARE EXPECTED TO PERSIST THROUGH THE WEEKEND AND
LIKELY INTO THE START OF NEXT WEEK. BY MID-WEEK CONDITIONS ARE
EXPECTED TO SUBSIDE BELOW SMALL CRAFT ADVISORY LEVELS. /42
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 11 PM SATURDAY TO 8 PM PDT SUNDAY FOR
PZZ251-271.
SMALL CRAFT ADVISORY FROM 8 PM SATURDAY TO 8 PM PDT SUNDAY FOR
PZZ252-272.
SMALL CRAFT ADVISORY FROM 2 PM SATURDAY TO 8 PM PDT SUNDAY FOR
PZZ253-273.
WWW.WEATHER.GOV/PORTLAND
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