974  
FXUS66 KPDT 062042  
AFDPDT  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PENDLETON OR  
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 WALLOWA'S, 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.  
 
 
   
AVIATION...18Z TAFS  
A FRONTAL PASSAGE IS BRINGING WIDESPREAD  
STRATIFORM PRECIPITATION ACROSS THE AREA. THE ONLY SITES NOT BEING  
IMPACTED BY RAIN IS BDN/RDM. EVERYONE ELSE IS INITIALIZING WITH  
LIGHT RAIN AND SHOULD LAST UNTIL THE EARLY EVENING HOURS. NOT  
EXPECTING ANY THUNDERSTORM THREATS, AS THE STORMS WILL BE SECLUDED  
THROUGH THE WA CASCADES THIS AFTERNOON. SOME HEAVIER PASSING RAIN  
SHOWERS COULD DIP VISIBILITIES BRIEFLY IN THE 4-5 MILE RANGE, BUT  
OTHERWISE EXPECTING VFR CONDITIONS TO PREVAIL FOR THE MOST PART.  
 
 
   
PRELIMINARY POINT TEMPS/POPS  
 
PDT 58 78 50 84 / 40 30 0 0  
ALW 62 78 55 83 / 40 30 0 0  
PSC 59 81 52 87 / 40 10 0 0  
YKM 54 78 52 87 / 40 10 0 0  
HRI 60 81 54 87 / 40 10 0 0  
ELN 53 73 52 84 / 50 10 0 0  
RDM 47 78 40 84 / 10 0 0 0  
LGD 55 75 46 81 / 30 40 0 0  
GCD 53 78 45 82 / 10 10 0 0  
DLS 60 77 56 86 / 30 0 0 0  
 
 
   
PDT WATCHES/WARNINGS/ADVISORIES  
 
OR...NONE.  
WA...NONE.  
 
 
 
 
SHORT TERM...95  
LONG TERM....95  
AVIATION...95  
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