063
FXUS66 KPQR 081657
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
957 AM PDT TUE JUL 8 2025
UPDATED AVIATION DISCUSSION.
SYNOPSIS
HIGH PRESSURE REMAINS IN PLACE TODAY, SUPPORTING
TEMPS IN THE UPPER 80S TO LOW 90S INLAND. SLIGHT CHANCE FOR
SHOWERS ON WEDNESDAY IN SOUTHWEST WASHINGTON AS A WEAK
DISTURBANCE MOVES THROUGH THE REGION. WARMER TEMPERATURES
RETURN FOR THE LATTER PART OF THE WEEK AND INTO THE WEEKEND AS A
WEAK UPPER LEVEL RIDGING IS EXPECTED TO RETURN.
SHORT TERM...NOW THROUGH WEDNESDAY NIGHT
HIGH PRESSURE ACROSS THE
NORTHEAST PACIFIC WILL SUPPORT ANOTHER WARM DAY WITH HIGHS IN
THE UPPER 80S TO LOW 90S ACROSS THE INTERIOR LOWLANDS, MID 60S
TO LOW 70S ALONG THE COAST, AND MID 70S TO MID 80S IN THE
CASCADES. THERE REMAINS A MODERATE HEATRISK FOR THE INLAND
VALLEYS INCLUDING THE GORGE AND VALLEYS WITHIN THE CASCADE
FOOTHILLS THROUGH TUESDAY.
A BRIEF PATTERN CHANGE IS EXPECTED LATE TUESDAY THROUGH
WEDNESDAY AS PAIR OF DISTURBANCES APPROACH THE FORECAST AREA
BUT BRING MINIMAL IMPACTS. A SHORT WAVE TROUGH TO THE NORTH WILL
COME ONSHORE ACROSS BRITISH COLUMBIA, SENDING A WEAK TROUGH
THROUGH THE REGION TUESDAY NIGHT. THIS WILL SUPPORT TEMPS AROUND
10 DEGREES COOLER FOR THE INTERIOR LOWLANDS AND CASCADES ON
WEDNESDAY. THE AREAS ALONG THE COAST WON'T SEE AS DRAMATIC OF A
DROP-OFF IN TEMPS BUT STILL EXPECTED TEMPS AROUND 5 DEGREES
COOLER. LIGHT RAIN SHOWERS WILL ALSO BE POSSIBLE ALONG THE
NORTHERN OR AND SOUTHERN WA COAST AND COAST RANGES GIVEN THE
BETTER MOISTURE ADVECTION INTO THIS AREA. RAINFALL OF A FEW
HUNDREDTHS IS POSSIBLE WEDNESDAY WITH SPRINKLES POSSIBLE INLAND
ACROSS SOUTHWESTERN WA. AT THE SAME TIME, A CUT-OFF LOW OFF THE
NORTHERN CALIFORNIA COAST WILL SLOWLY DRIFT INLAND TOWARD
SOUTHERN/CENTRAL OREGON. MODEL GUIDANCE SHOWS MINIMAL
PRECIPITATION WITH THIS SYSTEM BUT THERE IS A SLIGHT CHANCE FOR
A COUPLE OF SHOWERS OR THUNDERSTORMS TO DEVELOP ALONG THE
CASCADES CREST OF LANE COUNTY LATE THIS EVENING. -BATZ
LONG TERM...THURSDAY THROUGH MONDAY
HIGH TEMPS ON THURSDAY
WILL BE SIMILAR TO WEDNESDAY, RIGHT AROUND AVERAGE FOR JULY.
CONDITIONS TREND WARMER AND DRIER FOR FRIDAY AND THROUGH THE
WEEKEND AS HIGH PRESSURE BUILDS BACK INTO THE REGION. HIGHS ARE
EXPECTED TO JUMP BACK INTO THE UPPER 80S TO LOW 90S INLAND, MID
60S TO LOW 70S ALONG THE COAST, AND INTO THE 80S FOR THE
CASCADES. NORTHERLY DIURNAL WINDS ARE EXPECTED EACH DAY WITH
VARIABLE WINDS OVERNIGHT. NO PRECIPITATION IS EXPECTED THURSDAY
THROUGH EARLY NEXT WEEK. -BATZ
AVIATION
IFR/LIFR CIGS AT THE COAST EXPECTED TO PERSIST THROUGH
17-20Z TUE, AFTERWARDS SEEING 90% CONFIDENCE IN RETURNING TO VFR
CONDITIONS. CEILINGS EXPECTED TO DETERIORATE ONCE AGAIN AFTER 06-09Z
WED. VFR CONDITIONS WITH MOSTLY CLEAR SKIES EXPECTED ELSEWHERE. FEW
SCATTERED SHOWERS POSSIBLE WITH A 10-15% CHANCE OF THUNDERSTORMS IN
THE CENTRAL OREGON CASCADES 00-06Z WED, THOUGH THUNDERSTORMS SHOULD
REMAIN WELL AWAY FROM ANY TERMINALS. LIGHT NORTHWEST WINDS ACROSS
THE REGION INCREASE FOR INLAND AREAS AFTER 21Z TUE WITH GUSTS UP TO
20 KTS POSSIBLE AT ALL INLAND TERMINALS. WINDS BECOME LIGHT AFTER 03-
06Z WED AND BEGIN SHIFTING SOUTHERLY 09-12Z WED AS A WEAK WEATHER
SYSTEM MOVES INTO THE REGION. THIS WEATHER SYSTEM WILL BRING LIGHT
RAIN SHOWERS TO THE COAST NORTH OF KTMK AND INLAND AREAS OF SW
WASHINGTON AFTER 12Z WED ALONG WITH LOWERING CEILINGS.
PDX AND APPROACHES...VFR WITH GENERALLY CLEAR SKIES. WEAK NORTHWEST
WINDS INCREASE AROUND 00Z TUE, WITH GUSTS UP TO 20 KT POSSIBLE.
DECREASING BELOW 5 KTS BY 06-09Z TUE. -HEC
MARINE
A TYPICAL SUMMERTIME PATTERN PERSISTS THROUGH MUCH OF
THE COMING WEEK AS SURFACE HIGH PRESSURE OFFSHORE MAINTAINS NORTH
TO NORTHWEST WINDS ACROSS THE COASTAL WATERS. WINDS HAVE COME DOWN
FROM DAYTIME HOURS, WITH GUSTS UNDER 15 KTS. SCA HAS BEEN ENDED AS
A RESULT. SEAS WILL REMAIN IN THE 4-6 FT RANGE, COMPRISED MAINLY
OF SHORT PERIOD WIND- DRIVEN WAVES AND A MODEST, MID- PERIOD
WESTERLY SWELL. NEXT CHANCE OF SMALL CRAFT ADVISORY CONDITIONS IS
THURSDAY, WITH LOW LEVEL SCA CONDITIONS POSSIBLE THROUGH THE
WEEKEND. -TK/JLIU
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSPORTLAND
X.COM/NWSPORTLAND
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page