037  
FXUS65 KBOI 290859  
AFDBOI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOISE ID  
259 AM MDT FRI AUG 29 2025  
   
SHORT TERM...TODAY THROUGH SUNDAY NIGHT  
FOR TODAY, LINGERING  
MID-LEVEL MOISTURE WILL SUPPORT ANOTHER ROUND OF AFTERNOON AND  
EVENING THUNDERSTORMS. SIMILAR TO YESTERDAY, STORMS WILL  
INITIATE ACROSS SE OREGON AND MOUNTAINOUS AREAS ALONG THE ID/OR  
BORDER. ISOLATED STRONGER STORMS ARE POSSIBLE, BRINGING WINDS TO  
45 MPH BRIEF HEAVY RAIN AND SMALL HAIL. SATURDAY AND SUNDAY  
WILL SEE AN AMPLIFYING UPPER RIDGE BRING DRY AND STABLE  
CONDITIONS TO THE REGION, SHUTTING DOWN ANY POTENTIAL FOR  
THUNDERSTORM DEVELOPMENT. TEMPERATURES WILL WARM SEVERAL DEGREES  
EACH DAY THROUGH SUNDAY, PLACING VALLEYS IN THE LOW 90S AND  
MTNS IN THE LOW-MID 80S OVER THE WEEKEND. WESTERLY FLOW WILL  
CONTINUE TO TRANSPORT SMOKE FROM WILDFIRES (MOSTLY THE EMIGRANT  
FIRE LOCATED SW OF BEND) INTO SE OREGON AND SW IDAHO. COULD SEE  
SOME IMPROVEMENT OVER THE WEEKEND AS SOUTHERLY FLOW DEFLECTS  
THE THICKER SMOKE TO THE NORTH AND WEST OF OUR AREA.  
   
LONG TERM...MONDAY THROUGH FRIDAY  
A HIGH AMPLITUDE RIDGE WILL  
REMAIN POSITIONED OVER THE INTERIOR WESTERN US THROUGH MOST OF  
NEXT WEEK. SOUTHERLY FLOW ON THE WEST SIDE OF THE RIDGE AND A  
MINOR CLOSED LOW ALONG THE CA COAST WILL DRAW MONSOON MOISTURE  
NORTHWARD INTO THE REGION TUE/WED. THERE ARE DIFFERING IDEAS  
AMONG THE OPERATIONAL SOLUTIONS ON HOW TO HANDLE THESE FEATURES,  
BUT INITIAL THOUGHTS WOULD BE THAT SE OREGON AND AREAS ALONG  
THE ID/NV BORDER ARE THE MOST LIKELY SPOTS TO SEE A RESULTING  
CHANCE OF THUNDERSTORMS. THIS THREAT WOULD POSSIBLY SHIFT INTO  
CENTRAL IDAHO FOR WED/THUR, THOUGH CONFIDENCE ON THESE DETAILS  
IS LOW. FOR NOW STICKING WITH THE NBM OUTPUT WHICH CARRIES A  
10-15% CHANCE IN THESE AREAS STARTING TUESDAY. TEMPERATURES HOLD  
AROUND 5 DEGREES ABOVE NORMAL UNDER THE RIDGE, OR HIGHS IN THE  
LOW 90S ACROSS LOWER VALLEYS AND MID 80S IN MTN VALLEYS.  
 
 
   
AVIATION  
GENERALLY VFR. HAZE FROM WILDFIRE SMOKE THROUGH  
~20KFT MSL. ISOLATED SHOWERS/THUNDERSTORMS IN E-CENTRAL OREGON,  
AND HIGHER TERRAIN SURROUNDING THE SNAKE PLAIN IN IDAHO AFTER  
20Z TODAY. THUNDERSTORMS CAPABLE OF MODERATE/HEAVY RAINFALL,  
SMALL HAIL, AND GUSTS TO 30-45 KT. SURFACE WINDS: VARIABLE UP TO  
10 KT. WINDS ALOFT AT 10KFT MSL: VARIABLE 5-10 KT.  
 
KBOI...VFR. HAZE FROM WILDFIRE SMOKE. LIGHT SE SURFACE WINDS,  
BECOMING NW IN THE AFTERNOON.  
 
WEEKEND OUTLOOK...VFR. CONTINUED HAZE FROM WILDFIRE SMOKE.  
SURFACE WINDS GENERALLY S-E 5-15 KT.  
 
 
   
BOI WATCHES/WARNINGS/ADVISORIES  
 
ID...NONE.  
OR...NONE.  
 
 
 
 
 
WWW.WEATHER.GOV/BOISE  
 
INTERACT WITH US VIA SOCIAL MEDIA:  
WWW.FACEBOOK.COM/NWSBOISE  
WWW.X.COM/NWSBOISE  
 
SHORT TERM...DG  
LONG TERM....DG  
AVIATION.....DG  
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