360
FXUS66 KPQR 061157 AAB
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
457 AM PDT MON JUL 6 2026
SYNOPSIS
WARM AND SUNNY CONDITIONS CONTINUE THROUGH THE
REMAINDER OF THE WEEK. HIGH PRESSURE TODAY WILL RESULT IN THE
WARMEST TEMPERATURES THIS WEEK. THIS WILL RESULT IN LOCALIZED
MODERATE HEATRISK ACROSS THE INNER PORTLAND METRO, COLUMBIA
RIVER GORGE, AND UPPER HOOD RIVER VALLEY. AN UPPER-LEVEL TROUGH
MOVING INTO BRITISH COLUMBIA TOMORROW WILL COOL TEMPERATURES A
FEW DEGREES AND ALSO BRING A 15-20% CHANCE FOR LIGHT RAIN ALONG
THE SOUTH WASHINGTON AND NORTH OREGON COAST ON WEDNESDAY. BROAD
TROUGHING WILL CONTINUE THROUGH THE WEEK AND BRING PERSISTENT
ONSHORE FLOW, WHICH WILL MAINTAIN SEASONABLE TEMPERATURES.
SHORT TERM...TODAY THROUGH WEDNESDAY
THE WARMEST DAY OF THE
WEEK IS EXPECTED TODAY WITH HIGH TEMPERATURES PEAKING IN THE
UPPER 80S TO LOW 90S ACROSS INTERIOR VALLEYS WHILE THE COAST
REMAINS IN THE LOW 60S TO LOW 70S. CHANCES FOR EXCEEDING 90
DEGREES REMAIN AROUND 10-35% CHANCE ACROSS THE WILLAMETTE
VALLEY, 50-75% CHANCE ALONG THE CENTRAL COLUMBIA RIVER GORGE THE
UPPER HOOD RIVER VALLEY, AND LESS THAN 10% FOR THE REST OF THE
INTERIOR VALLEYS. FOR THE WILLAMETTE VALLEY, THE CENTRAL
COLUMBIA RIVER GORGE AND THE UPPER HOOD RIVER VALLEY, THERE WILL
BE SOME LOCALIZED MODERATE HEATRISK, MEANING THIS LEVEL OF HEAT
WILL AFFECT THOSE SENSITIVE TO HEAT, ESPECIALLY THOSE WITHOUT
ADEQUATE COOLING OR HYDRATION. LOW TEMPERATURES TONIGHT AND INTO
TUESDAY MORNING ARE EXPECTED TO BE IN THE UPPER 40S TO MID 50S
ACROSS THE ENTIRE AREA SHOULD PROVIDE DECENT OVERNIGHT RELIEF
FROM THE HEAT.
TUESDAY TO WEDNESDAY, ENSEMBLE GUIDANCE REMAINS IN VERY GOOD TO
EXCELLENT AGREEMENT THAT AN UPPER-LEVEL TROUGH FROM THE GULF OF
ALASKA MOVING EAST/SOUTHEASTWARD INTO BRITISH COLUMBIA WILL HELP
TO DE-AMPLIFY THE HIGH PRESSURE ANCHORED OVER THE GREAT BASIN.
THIS SYSTEM IS EXPECTED TO STAY NORTHWARD OF OUR CWA, KEEPING
NORTHWEST OREGON AND SOUTHWEST WASHINGTON PREDOMINATELY DRY.
HOWEVER, COULD SEE A 15-20% CHANCE FOR VERY LIGHT PRECIPITATION
ALONG THE NORTH OREGON AND SOUTH WASHINGTON COAST. DESPITE THE
LACK OF PRECIPITATION, THIS SYSTEM WILL STILL MAINTAIN
RELATIVELY COOL, ONSHORE FLOW AND KEEP HELP TO KEEP TEMPERATURES
NEAR SEASONAL NORMALS. WEST- NORTHWESTERLY WINDS ARE GENERALLY
EXPECTED TO BE LIGHT FOR MOST AREAS DURING THIS TIME. HOWEVER,
WILL SEE LOCALLY BREEZIER WINDS ALONG THE CENTRAL COLUMBIA RIVER
GORGE AND UPPER HOOD RIVER VALLEY, WHERE THERE IS A 30-45%
CHANCE FOR AT LEAST ISOLATED WIND GUSTS EXCEEDING 40 MPH TUESDAY
AND WEDNESDAY.
IT IS IMPORTANT TO REMEMBER THAT WHILE TEMPERATURES WILL BE
WARM, 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 PERSONAL FLOATATION DEVICES, VISITING
WITH A BUDDY, AND ALWAYS BEING AWARE OF YOUR SURROUNDINGS.
/42-10
LONG TERM...THURSDAY THROUGH SUNDAY
THURSDAY, MOST ENSEMBLE
MEMBERS SHOW THE AFOREMENTIONED TROUGH WEAKENING AS IT CONTINUES
TO MOVE EASTWARD THROUGH BRITISH COLUMBIA AND INTO ALBERTA. AS
THE TROUGH LOOSES SYNOPTIC INFLUENCE OVER THE PAC NW, THE GREAT
BASIN HIGH IS EXPECTED TO BRIEFLY STRENGTHEN THUS RETURNING
DRY, ZONAL FLOW OVER THE REGION. HOWEVER, THE ZONAL FLOW LOOKS
TO BE RATHER SHORT LIVED AS BY THE LATTER PART OF THE WEEK,
ENSEMBLE MEMBERS ARE SHOWING ADDITIONAL TROUGHING MOVING DOWN
FROM THE GULF OF ALASKA INTO THE NORTHEAST PACIFIC/BRITISH
COLUMBIA REGION. THERE STILL REMAINS A FAIR AMOUNT OF UNCERTAINTY
IN THE FORECAST FOR THE LATTER PART OF THIS WEEK AND INTO THE
WEEKEND AS TO THE EXACT PLACEMENT AND MAGNITUDE OF THIS EASTERN
PACIFIC TROUGH, BUT ENSEMBLES ARE KEEPING THIS SYSTEM WELL TO
OUR NORTH TO KEEP US DRY, WITH NEAR TO SLIGHTLY COOLER THAN
NORMAL TEMPERATURES. /42
AVIATION
LARGELY VFR CONDITIONS CONTINUE ACROSS THE AIRSPACE
AND ARE EXPECTED TO PERSIST THROUGH THE TAF PERIOD. INLAND
LOCATIONS ARE EXPECTED TO MAINTAIN VFR CONDITIONS, BUT THERE IS A
VERY LOW PROBABILITY (5-10%) CHANCE OF A BRIEF PERIOD OF MVFR
CONDITIONS DEVELOPING WITHIN THE WILLAMETTE VALLEY THROUGH 18Z
MONDAY. NORTH/NORTHWEST WINDS 5-10 KT, BEFORE BECOMING LIGHT AND
VARIABLE AROUND 02-04Z TUESDAY.
FOR COASTAL LOCATIONS, IFR/LIFR WILL PERSIST THROUGH THE
MAJORITY OF THE TAF PERIOD. SOME IMPROVEMENT IS EXPECTED ALONG
THE COAST STARTING AROUND 19Z MONDAY, BUT WILL LIKELY BE LIMITED
TO AREAS BETWEEN KAST AND KTMK. KONP HAS A 15% CHANCE OF A
BRIEF PERIOD OF IFR CONDITIONS, BUT ANY IMPROVEMENT WILL BE
SHORT LIVED. IFR TO LIFR CONDITIONS ARE EXPECTED TO RETURN TO
THE COAST AROUND 01-04Z TUESDAY. NORTH/NORTHWEST WINDS BUILD TO
10-15 KT WITH GUSTS NEAR 20 KT THROUGH AROUND 04Z-06Z TUESDAY.
KPDX AND APPROACHES...VFR CONDITIONS EXPECTED TO DOMINATE THROUGH
THE TAF PERIOD. NORTH/NORTHWEST WINDS 5-10 KT, BEFORE BECOMING
LIGHT AND VARIABLE AROUND 02-04Z TUESDAY. /42
MARINE
HIGH PRESSURE OVER THE REGION IS RESULTING GUSTY
NORTHERLY WINDS ACROSS ALL WATERS AS GUSTS OF 20-25 KT AND SEAS
OF 6 TO 8 FT ARE CURRENTLY BEING OBSERVED THIS MORNING. WILL
MAINTAIN THE CURRENT SMALL CRAFT ADVISORY THROUGH EARLY THIS
MORNING. HOWEVER, A PATTERN CHANGE IS EXPECTED TO OCCUR TODAY AS
A BROAD, UPPER LEVEL ALASKAN TROUGH MOVES SOUTH/SOUTHEAST INTO
WESTERN CANADA. THIS WILL RESULT IN BOTH WINDS AND SEAS
SUBSIDING. THE NORTHERN WATERS WILL EASE FIRST, FOLLOWING BY THE
CENTRAL AND LASTLY THE SOUTHERN. EXPECT NORTHERLY WINDS TO
PERSIST, WITH GUSTS BELOW 15 KT AND SEAS OF 5 TO 7 FT THROUGH
THE REMAINDER OF THE WEEK. /42
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 11 AM PDT THIS MORNING FOR
PZZ251>253-271>273.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
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