719  
FXUS66 KPDT 021729  
AFDPDT  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PENDLETON OR  
1029 AM PDT WED JUL 2 2025  
   
UPDATED AVIATION DISCUSSION
 
 
   
AVIATION...18Z TAFS
 
VFR CONDITIONS WILL PREVAIL THROUGH THIS TAF  
PERIOD. ALL SITES MAY HAVE SUSTAINED WINDS OF 12-20KTS WITH GUSTS AT  
20-30KTS THROUGHOUT THE DAY (>50% CONFIDENCE). WINDS SHOULD DECREASE  
TO 12KTS OR LESS THIS EVENING, WITH AN EXCEPTION OF KDLS HAVING  
GUSTY WINDS LASTING LONGER. FEASTER/97  
 

 
   
PREV DISCUSSION
 
/ISSUED 918 PM PDT TUE JUL 1 2025/  
 
UPDATE...  
MADE SOME MINOR ADJUSTMENTS TO THE FORECAST MAINLY FOR POPS BASED  
ON THE CURRENT RADAR AND LATEST MODEL GUIDANCE. THE HEAT ADVISORY  
HAS EXPIRED AND THE RED FLAG WARNING FOR TODAY ACROSS CENTRAL  
OREGON HAS ALSO EXPIRED.  
 
PREV DISCUSSION... /ISSUED 451 PM PDT TUE JUL 1 2025/  
 
SHORT TERM...TODAY THROUGH THURSDAY...THE PACNW WILL BE IN  
BETWEEN THE RIDGING TO THE NORTH AND THE CUTOFF LOW MOVING ACROSS  
CALIFORNIA. THE HEAT ADVISORY CONTINUES THROUGH THIS EVENING FOR  
THE BASIN, GORGE, YAKIMA/KITTITAS VALLEYS, SIMCOE HIGHLANDS AND  
NORTH CENTRAL OREGON, GIVEN THE UPPER RIDGE KEEPING OUR TODAY'S  
TEMPERATURES IN THE LOW 100S FOR THESE AREAS. THE REMAINING  
FORECAST AREA WILL BE IN THE 90S, THOUGH RHS WILL MAINLY BE IN THE  
TEENS ACROSS THE FORECAST AREA. AND WITH THE COLUMBIA BASIN AND  
KITTITAS VALLEY BEING DRIER AND WARMER THAN OTHER LOCATIONS, THIS  
WILL ELEVATE CRITICAL FIRE CONDITIONS FOR THOSE SPECIFIC AREAS AS  
WELL HEADING INTO WEDNESDAY. WITH ELEVATED CAPE VALUES (>500  
J/KG), PWATS OF 0.80-1 INCHES AND LOW LAPSE RATES OF 6.5-7.0 C/KM,  
WE ARE ALSO LOOKING AT THUNDERSTORMS THIS AFTERNOON INTO THIS  
EVENING WITH ABUNDANT LIGHTNING OVER CENTRAL OR, JOHN DAY  
HIGHLANDS, AND JOHN DAY BASIN, THANKS TO THE UPSTREAM  
INTENSIFICATION INFLUENCED FROM THE CUTOFF LOW. THIS ALLOWS THE  
RED FLAG WARNING FOR ZONE OR700 THROUGH THE EVENING AS WELL DUE TO  
ABUNDANT LIGHTNING FROM THESE STORMS. IN ADDITION TO THAT, BREEZY  
OUTFLOW WINDS (15-25 MPH) WILL BE INDUCED ACROSS THE CASCADE GAPS  
FROM THE STRONG SURFACE PRESSURE GRADIENTS. HOWEVER, THERE IS A  
30-60% PROBABILITY OF WIND GUSTS EXCEEDING TO 30- 35 MPH AROUND  
THE GORGE AND KITTITAS VALLEY. WITH PERSISTENT WARM TEMPS (<90  
DEGREES) AND LOW RHS (<20%), RED FLAG WARNING HAS BEEN ISSUED FOR  
WEDNESDAY FROM 2PM TO 9PM PDT FOR THE COLUMBIA BASIN.  
 
THUNDERSTORMS WILL DEVELOP OVER THE EASTERN MOUNTAINS WEDNESDAY  
LATE MORNING INTO EVENING WITH THE CAMS SHOWING CAPE VALUES  
BECOMING SLIGHTLY MODEST (500-800 J/KG) ALONG WITH DECREASED PWATS  
(<0.75 INCHES). EVEN THOUGH THE MOISTURE LEVEL REMAINS LOW, DRY  
LIGHTNING CAN BE STILL BE THREATENING TO POTENTIAL NEW OR ONGOING  
FIRES. HOWEVER, THESE STORMS SHOULD MOVE FURTHER EASTWARD OUT OF  
OUR AREA BY TOMORROW NIGHT. BREEZY TO WINDY CONDITIONS WILL  
CONTINUE THROUGHOUT THE DAY TOMORROW ACROSS THE CASCADE GAPS FROM  
THE STRENGTHENING SURFACE PRESSURE GRADIENTS. THE RAW ENSEMBLES  
SUGGEST A 30-50% PROB FOR GUSTS EXCEEDING TO 40 MPH OVER THE GORGE  
AND KITTITAS VALLEY. WINDS WILL BEGIN DECREASING LATER IN THE  
EVENING.  
 
THURSDAY MORNING SHOULD BE RELATIVELY QUIET UNTIL EVENING SHOWERS  
ARRIVE. TEMPERATURES WILL DECREASE TO THE 70S AND 80S ACROSS THE  
FORECAST AREA WITH RHS GRADUALLY RECOVER A BIT TO THE 20S.  
HOWEVER, PORTIONS OF THE YAKIMA VALLEY, NORTH CENTRAL OR, AND  
UPPER PART OF THE LOWER BASIN MAY HAVE POCKETS OF LOW RHS IN THE  
TEENS. BUT, NO CRITICAL FIRE CONDITIONS WILL BE ANTICIPATED AT  
THIS TIME. THE CASCADE GAPS WILL HAVE BREEZY WINDS AT 15-25 MPH  
WITH A 30-40% PROB FOR GUSTS TO REACH 30 MPH AT KITTITAS VALLEY.  
FEASTER/97  
 
 
LONG TERM...FRIDAY THROUGH TUESDAY...LIGHT SHOWERS WILL ARRIVE  
FRIDAY LATE MORNING INTO EVENING AT THE EASTERN MOUNTAINS WITH  
SLIGHT CHANCES (<30%) OF AFTERNOON THUNDERSTORMS. WEAK INSTABILITY  
(300-800 J/KG) AND LOW MOISTURE LEVEL (<0.10 INCHES) MAY INHIBIT  
THE STORMS FROM BECOMING SEVERE, BUT CG LIGHTNING COULD BE THE  
MAIN THREAT. LATE FRIDAY EVENING INTO NIGHT, PRECIP ACTIVITY  
SHOULD BE OUT OF THE AREA. ALTHOUGH THE GORGE WILL BE GUSTING AT  
25-35 MPH IN THE AFTERNOON, THE REMAINING LOCATIONS WILL HAVE  
LIGHT WINDS WITH OCCASIONAL BREEZES. SATURDAY COULD HAVE MORNING  
SHOWERS OVER THE WALLOWAS BUT, CHANCES ARE LOW (<20%). STARTING  
SATURDAY AFTERNOON ONWARDS, THE WEATHER WILL BE WARM AND DRY WITH  
SLIGHT BREEZY WINDS. FEASTER/97  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
PDT 92 57 86 59 / 10 0 0 0  
ALW 91 61 86 62 / 10 0 0 0  
PSC 96 58 89 59 / 10 0 0 0  
YKM 93 57 87 58 / 0 0 0 0  
HRI 94 59 89 59 / 10 0 0 0  
ELN 88 56 84 57 / 0 0 0 0  
RDM 86 46 83 48 / 0 0 0 10  
LGD 89 54 84 57 / 20 20 0 10  
GCD 91 52 87 54 / 20 20 20 20  
DLS 86 59 85 59 / 0 0 0 0  
 

 
   
PDT WATCHES/WARNINGS/ADVISORIES
 
 
OR...RED FLAG WARNING FROM 2 PM THIS AFTERNOON TO 9 PM PDT THIS  
EVENING FOR ORZ691.  
 
WA...RED FLAG WARNING FROM 2 PM THIS AFTERNOON TO 9 PM PDT THIS  
EVENING FOR WAZ690-691.  
 

 
 

 
 
SHORT TERM...97  
LONG TERM....97  
AVIATION...97  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OR Page
The Nexlab WA Page Main Text Page