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.

The Nexlab OR Page
The Nexlab WA Page Main Text Page