253  
FXUS66 KPDT 071737  
AFDPDT  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PENDLETON OR  
1037 AM PDT THU AUG 7 2025  
 
UPDATED AVIATION DISCUSSION  
   
AVIATION...18Z TAFS
 
VFR CONDITIONS TO PREVAIL THROUGH THE  
PERIOD. SCT-BKN CIGS AROUND 4KFT AGL WILL CONTINUE TO IMPACT SITES  
RDM/BDN INTO THE EARLY AFTERNOON, WITH CIGS OTHERWISE ABOVE 10KFT  
AGL THROUGH THE REST OF THE PERIOD FOR ALL SITES. BREEZY WEST TO  
NORTHWEST WINDS 12-20KTS WITH GUSTS UP TO 30KTS WILL IMPACT SITES  
DLS/PDT THROUGH 7Z, BECOMING 12KTS OR LESS OVERNIGHT AND THROUGH  
THE REMAINDER OF THE PERIOD. WINDS 10-15KTS WITH GUSTS UP TO 25KTS  
WILL IMPACT SITE YKM THROUGH 4Z, AND SITE ALW THROUGH 00Z, AND  
RDM/BDN THROUGH 3Z, BECOMING LIGHT THROUGH THE REST OF THE PERIOD.  
WINDS WILL BE 12KTS OR LESS AT SITE PSC THROUGH THE PERIOD.  
LAWHORN/82  
 
PREV DISCUSSION... /ISSUED 142 PM PDT WED AUG 6 2025/  
 
DISCUSSION...STRATIFORM PRECIPITATION CURRENTLY MOVING THROUGH  
THE REGION AS A FRONT PUSHES THROUGH. MOST PRECIP WILL BE LIGHT  
ALBEIT EXPECTING SOME ISOLATED THUNDERSTORMS TO DEVELOP NEAR WA  
CASCADE/CASCADE CREST IN THE EARLY AFTERNOON HOURS. ADDITIONAL  
DAYTIME HEATING AND SOME CAPE DEVELOPING NEAR ~250 J/KG WILL BE  
ENOUGH TO TRIGGER A POP-UP STORM. NOT EXPECTING A WIDESPREAD  
EVENT, BUT SOME STORMS COULD PRODUCE SOME GUSTY OUTFLOW WINDS AND  
PEA SIZE HAIL. NOT EXPECTING SIGNIFICANT AMOUNTS OF PRECIP, BUT  
WETTING RAINS (>.10" INCH PER 24 HOURS) IS VERY POSSIBLE (>90%  
CHANCE) WITH NBM SHOWING UP TO A HALF INCH FALLING OVERNIGHT WHERE  
THE HEAVIEST STORMS ARE. SPC DOES NOT HAVE THIS AREA IN A RISK, SO  
NOT EXPECTING ANYTHING SEVERE OVERNIGHT.  
 
COOLER TEMPERATURES WILL CONTINUE TODAY AND TOMORROW AS A  
SHORTWAVE CONTINUES TO PUSH INTO THE AREA WITH HIGHS IN THE UPPER  
70S TO LOWER 80S FOR MUCH OF THE BASIN AND OTHER MOUNTAIN REGIONS.  
THIS WILL PROVIDE ADEQUATE LIFTING AND MOISTURE FOR THUNDERSTORMS  
TO SHIFT TOWARDS SE WASHINGTON/NE OREGON AS THE SHORTWAVE  
PROGRESSES TO THE EAST OVER THE NEXT 36 HOURS. THUNDERSTORM  
CHANCES SHIFT TO THE WALLOWAS, EASTERN MOUNTAINS, AND PARTS OF SE  
WASHINGTON. NOT EXPECTING AS MUCH QPF AS THE STORMS WE'LL HAVE IN  
THE CASCADES, BUT THEY WILL HAVE THE SAME POSSIBLE HAZARDS OF  
GUSTY OUTFLOW WINDS AND PEA SIZE HAIL.  
 
FIRE WEATHER CONDITIONS WILL BE TAMED VERY MUCH THANKS TO THE  
WETTER, COOLER WEATHER. NOT EXPECTING ANY RED FLAG CRITERIA TO BE  
A CONCERN UNTIL WE HEAD INTO EARLY NEXT WEEK AS RIDGING STARTS TO  
TAKE OVER THE SYNOPTIC PATTERN. DRYING AND WARMING WILL TAKE PLACE  
STARTING THE WORK WEEK, WHICH WILL COME WITH LOW RH, HIGH  
TEMPERATURES CONCERNS. NBM CURRENTLY DOESN'T SHOW WIDESPREAD EVENT  
OF LOW RH, BUT SMALL POCKETS OF OVERLAP BEGIN TO POP-UP.  
ADDITIONALLY, HEAT CONCERNS MAKE A COME BACK WITH THE RIDGE  
BUILDING IN HEAT, TEMPERATURES COULD REACH TRIPLE DIGITS IN SMALL  
PARTS OF THE BASIN. HEATRISK ONLY SHOWS WIDESPREAD "2"S BUT ONLY  
A SMALL POCKET OF MAJOR "3"S. WILL NEED TO KEEP AN EYE HOW  
STRONG/WEAK THE RIDGE DEVELOPS AS IT WILL TELL US A CLEARER STORY  
OF HOW HOT TEMPERATURES WILL BE. NBM CLUSTERS ARE SPLIT ABOUT  
PUSHING ON A STRONGER OR WEAKER RIDGE. FOR NOW, WE DON'T  
ANTICIPATE ANY HEAT HIGHLIGHTS WITH CURRENT FORECASTS, BUT WILL  
ALWAYS NEED TO MONITOR FOR ANY POSSIBLE TRENDS THAT FAVOR HEATING  
CONCERNS.  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
PDT 79 50 83 55 / 20 0 0 0  
ALW 79 55 83 61 / 30 0 0 0  
PSC 82 52 86 57 / 10 0 0 0  
YKM 79 52 86 58 / 0 0 0 0  
HRI 82 53 86 58 / 10 0 0 0  
ELN 74 52 84 57 / 10 0 0 0  
RDM 79 40 84 47 / 0 0 0 0  
LGD 76 46 81 51 / 30 0 0 0  
GCD 79 44 83 50 / 10 0 0 0  
DLS 77 56 86 61 / 0 0 0 0  
 

 
   
PDT WATCHES/WARNINGS/ADVISORIES
 
 
OR...NONE.  
WA...NONE.  

 
 

 
 
SHORT TERM...95  
LONG TERM....95  
AVIATION...82  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OR Page
The Nexlab WA Page Main Text Page