055  
FXUS66 KPDT 052052  
AFDPDT  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PENDLETON OR  
152 PM PDT TUE AUG 5 2025  
   
DISCUSSION
 
CURRENT CONDITIONS SHOW CLOUDS CLEARING OUT IN THE  
EARLY AFTERNOON. TEMPERATURES WARMED UP A LITTLE BIT THANKS TO THE  
CLEARING PATTERN OVER THE REGION. RH LEVELS IN THE WARM SPRINGS  
RESERVATION ARE LOWER THAN PREVIOUSLY THOUGHT WITH WINDS REACHING  
CRITERIA. GIVEN THAT, WE ISSUED A RED FLAG WARNING FOR THE ORZ703  
UNTIL 8PM THIS EVENING. NOT EXPECTING ANYMORE RED FLAGS FOR TODAY,  
HOWEVER THE BASIN (ORZ691) IS INCHING NEAR RED FLAG STATUS.  
LOCALIZED POCKETS MIGHT REACH CRITERIA, BUT NOTHING WIDESPREAD  
ENOUGH TO ISSUE RFW'S.  
 
FIRE WEATHER CONDITIONS ARE NOT AS CONDUCIVE THROUGH THE MIDDLE OF  
THE WEEK, GOING CLOSE TO THE WEEKEND. EXPECT THE NEXT COUPLE OF  
DAYS TO BE MORE CLOUDY, COOLER, AND RAINIER AS A SHORTWAVE DIGS  
DOWN FROM THE GULF OF ALASKA/BRITISH COLUMBIA SHORELINE. THIS  
PATTERN WILL BRING MAINLY STRATIFORM RAIN SHOWERS THROUGH THE  
BASIN AND MUCH OF THE MOUNTAIN ZONES. CHANCES OF SOME SCATTERED  
THUNDERSTORMS (15-25% CHANCE) GO UP FOR PARTS OF THE WA CASCADES,  
WITH PEAK STORM INTENSITY IN THE EARLY TO MID AFTERNOON HOURS. THE  
TROUGH WILL BECOME MORE AMPLIFIED GOING INTO THURSDAY, SPREADING  
RAIN CHANCES FOR MUCH OF THE BASIN, KITTITAS VALLEY, AND LARGE  
PORTIONS OF THE EASTERN MOUNTAINS. LARGEST CAPE VALUES, ACCORDING  
TO THE NBM, ARE LOCATED IN WALLOWA COUNTY AND PORTIONS OF EASTERN  
WASHINGTON (200-400 J/KG). THIS IS WHERE THE STRONGEST STORMS ARE  
EXPECTED GOING THROUGH THURSDAY. CAN'T RULE OUT THE POSSIBILITY  
THAT SOME OF THESE STORMS PRODUCE PEA SIZE HAIL WITH GUSTY OUTFLOW  
WINDS.  
 
THE PATTERN WILL FLIP TO A DRY, WARMER SCENARIO AS RIDGING RE-  
ENTERS THE PICTURE. HIGH TEMPERATURES WILL GRADUALLY WARM INTO  
THE LOW TO MID 90S FROM SATURDAY TO TUESDAY. A LITTLE UNCERTAIN  
ABOUT EXACT DETAILS OF HOW WARM IT WILL GET DUE TO UNCERTAINTY OF  
THE STRENGTH OF THE RIDGE. CLUSTERS FORM A DISAGREEMENT ON THIS  
ISSUE WITH 47% BRINING ON A STRONGER RIDGE ALONG WITH WARMER  
TEMPERATURES, WHILE 21% ACTUALLY BRING COOLER TEMPERATURES. FIRE  
WEATHER CONCERNS RETURN REGARDLESS OVER THE WEEKEND INTO EARLY  
NEXT WEEK, AS DRY AND BREEZY CONDITIONS MAKE OUR SOUTHERN FIRE  
WEATHER ZONES MORE SUSCEPTIBLE TO ELEVATED FIRE CONCERNS.  
 

 
   
AVIATION...18Z TAFS
 
CURRENT CONDITIONS ARE CLEAR WITH LIGHT AND  
VARIABLE WINDS. NOT EXPECTING ANYTHING LESS THAN VFR CONDITIONS  
FOR THE REST OF THE PERIOD. A COUPLE ROUND OF SHOWERS WOULD MAKE  
THEIR WAY INTO THE AREA FROM THE COLUMBIA BASIN INTO THE KITTITAS  
VALLEYS TOMORROW MORNING. WASN'T CONFIDENT ON WIDESPREAD  
PRECIPITATION, SO WENT AHEAD AND PUT A PROB30 GROUP FOR MOST OF  
THE BASIN SITES.  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
PDT 60 81 59 79 / 0 10 20 30  
ALW 65 81 62 78 / 0 10 20 40  
PSC 62 84 59 81 / 0 20 20 20  
YKM 63 80 54 78 / 20 50 30 20  
HRI 63 84 61 82 / 0 10 20 20  
ELN 60 76 53 73 / 20 60 40 20  
RDM 51 80 49 77 / 0 10 10 10  
LGD 54 79 56 75 / 0 10 20 40  
GCD 53 81 54 78 / 0 10 10 20  
DLS 64 79 61 77 / 20 60 30 10  
 

 
   
PDT WATCHES/WARNINGS/ADVISORIES
 
 
OR...RED FLAG WARNING UNTIL 8 PM PDT THIS EVENING FOR ORZ703.  
 
WA...NONE.  

 
 

 
 
SHORT TERM...95  
LONG TERM....95  
AVIATION...95  
 
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