467  
FXUS65 KBOI 090958  
AFDBOI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOISE ID  
358 AM MDT WED JUL 9 2025  
   
SHORT TERM...TODAY THROUGH FRIDAY NIGHT
 
WATER VAPOR SATELLITE  
IMAGERY SHOWING AN UPPER LOW CENTERED OVER NORTHERN CA TONIGHT.  
SHOWERS AND THUNDERSTORMS WILL DEVELOP OUT AHEAD OF THE LOW  
AS IT TRACKS THROUGH SE OREGON AND SW IDAHO THIS AFTERNOON. THE  
HIGHER THUNDERSTORM PROBABILITY WILL STRETCH FROM CENTRAL  
HARNEY AND MALHEUR COUNTIES IN OREGON INTO SOUTHWEST IDAHO FROM  
THE BOISE MTNS TO THE NV BORDER. OUTFLOW WINDS WILL BE THE MAIN  
THREAT FROM STORMS WITH GUSTS UP TO 60 MPH POSSIBLE FROM  
MALHEUR COUNTY EASTWARD THROUGH THE SNAKE PLAIN AND BOISE MTNS.  
WHILE NOT ALL LOCATIONS WILL SEE WINDS THIS STRONG, A BROAD AREA  
OF 35 TO 50 MPH WINDS IS LOOKING MORE LIKELY ACROSS NORTHERN  
MALHEUR COUNTY, THE WEISER BASIN, TREASURE VALLEY AND  
W-CENTRAL/BOISE MTNS. BLOWING DUST WILL ACCOMPANY THE WINDS AS  
WELL, ESPECIALLY AT LOWER ELEVATIONS. THIS SYSTEM ISN'T  
PARTICULARLY WET (PW VALUES IN THE 50-60 %TILE) WITH MAJORITY OF  
HIGH RES MODELS SHOWING 0.25-0.50"/HR RAINFALL. WHILE THESE  
AMOUNTS AREN'T GENERALLY A FLOOD CONCERN, WILL NEED TO KEEP AN  
EYE ON BURN SCARS, ESPECIALLY THE WAPITI, WHICH CARRY LOWER  
THRESHOLDS FOR FLOOD/DEBRIS POTENTIAL. THE CHANCE FOR  
THUNDERSTORMS CARRIES THROUGH SUNSET FOR MOST LOCATIONS,  
LINGERING THROUGH MIDNIGHT IN THE BOISE MTNS. BIGGEST CHANGES TO  
THE FORECAST TONIGHT WERE TO INCREASE THUNDERSTORM CHANCES TO  
30-40% IN AREA WHERE STRONG OUTFLOW WINDS ARE MORE LIKELY (WHICH  
ALSO MATCHES UP WITH SPC'S AREA OF MARGINAL RISK).  
 
THURSDAY AND FRIDAY WILL SEE A RETURN TO DRY WEATHER UNDER  
WEAK TROUGHING IN NW FLOW. TEMPERATURES BOTH DAYS WILL BE AT OR  
SLIGHTLY BELOW NORMAL. DAYTIME MIXING WILL BRING BREEZY  
CONDITIONS ON THURSDAY WITH GUSTS OF 25-35 MPH IN SNAKE PLAIN  
EAST OF BOISE.  
   
LONG TERM...SATURDAY THROUGH WEDNESDAY
 
A STRONG RIDGE OF HIGH  
PRESSURE IS EXPECTED TO SLOWLY BUILD INTO THE AREA OFF THE  
CALIFORNIA COAST OVER THE WEEKEND, RETURNING A WARMING AND  
DRYING TREND FROM SATURDAY TO EARLY NEXT WEEK. VALLEY DAYTIME  
TEMPERATURES ARE EXPECTED TO REACH THE MID TO UPPER 90S SATURDAY  
AND SUNDAY, AND CLOSE TO 100 ON MONDAY. LONG-TERM GUIDANCES  
GENERALLY PROJECT AN UPPER TROUGH SWEEPING ACROSS THE NORTHWEST  
REGION, BUT PRECIPITATION IS NOT HINTED BY THIS SYSTEM.  
WEDNESDAY WILL SEE A RIDGE BUILD INTO THE AREA ON TOP OF THE  
LARGE HIGH PRESSURE SYSTEM OVER THE DESERT SOUTHWEST, CONTINUING  
VERY WARM AND DRY CONDITIONS.  
 

 
   
AVIATION
 
MAINLY VFR UNDER FEW HIGH CLOUDS OVERNIGHT AND EARLY  
MORNING. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL  
DEVELOP ACROSS THE AREA WEDNESDAY AFTERNOON/EARLY EVENING. GUSTS  
UP TO 50 KT AND BLOWING DUST REDUCING VISIBILITY WILL BE  
POSSIBLE. SURFACE WINDS: W-NW 5-15 KT THROUGH MORNING AND EARLY  
AFTERNOON. WINDS ALOFT AT 10KFT MSL: S-SW 5-15 KT.  
 
KBOI...VFR THROUGH EARLY MORNING. SURFACE WINDS: VARIABLE LESS  
THAN 7 KT OVERNIGHT AND EARLY MORNING. WINDS NW 5-15 KT WITH  
GUSTS TO 20 KT WEDNESDAY AFTERNOON.  
 

 
   
BOI WATCHES/WARNINGS/ADVISORIES
 
 
ID...RED FLAG WARNING FROM 3 PM THIS AFTERNOON TO MIDNIGHT MDT  
TONIGHT IDZ400-420-423-424-426.  
OR...RED FLAG WARNING FROM 3 PM MDT /2 PM PDT/ THIS AFTERNOON TO  
MIDNIGHT MDT /11 PM PDT/ TONIGHT ORZ670-672>674.  
 

 
 

 
 
WWW.WEATHER.GOV/BOISE  
 
INTERACT WITH US VIA SOCIAL MEDIA:  
WWW.FACEBOOK.COM/NWSBOISE  
WWW.X.COM/NWSBOISE  
 
SHORT TERM...DG  
LONG TERM....JY  
AVIATION.....JY  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab ID Page
The Nexlab OR Page Main Text Page