369  
FXUS65 KBOI 080927  
AFDBOI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOISE ID  
327 AM MDT TUE JUL 8 2025  
   
SHORT TERM...TODAY THROUGH THURSDAY NIGHT
 
THE HEAT PEAKS  
TODAY IN RESPONSE TO UPPER LEVEL RIDGING OVER THE AREA. THE  
TREASURE VALLEY WILL SEE THE HOTTEST TEMPERATURES AND THE HEAT  
ADVISORY REMAINS IN PLACE TO COVER HIGHS OF 100 TO 105. AND  
THE MID-LEVEL MOISTURE RESPONSIBLE FOR SHOWER/THUNDERSTORM  
DEVELOPMENT OVER CENTRAL OREGON YESTERDAY, WILL SPREAD TO THE  
NORTH AND EAST TODAY BRINGING A 15-20% CHANCE OF THUNDERSTORMS  
TO SE OREGON AND THE W-CENTRAL IDAHO MTNS. EXPECT SMALL AND  
SHORT-LIVED DEVELOPMENT GIVEN THE MARGINAL CONDITIONS AND WEAK  
SHEAR ENVIRONMENT. LOCAL WIND GUSTS TO 45 MPH ARE POSSIBLE FROM  
SHOWERS/STORMS THAT DEVELOP WITH LITTLE RAINFALL EXPECTED.  
 
A CLOSED LOW ALONG THE CA COAST WILL LIFT THROUGH SE OREGON AND  
SW IDAHO ON WEDNESDAY. SLIGHT COOLING ALOFT AND INCREASED CLOUD  
COVER WILL TAKE 5-8 DEGREES OFF OF TODAY'S HIGHS. THE UPPER  
TROUGH PASSAGE WILL INCREASE THUNDERSTORM CHANCES ACROSS THE  
REGION. FORECAST STAYS WITH A SLIGHT CHANCE (15-20%), BUT THE  
POTENTIAL FOR GREATER COVERAGE EXISTS ACROSS SE OREGON AND AREAS  
OF SW IDAHO (BOISE MTNS TO THE ID/NV BORDER) WHERE THE DYNAMICS  
AND ENVIRONMENT ARE LOOKING MORE FAVORABLE. GUSTY OUTFLOW WINDS  
OF 35 TO 55 MPH WILL BE POSSIBLE AND COULD IMPACTS SITES WELL  
AWAY FROM THE STORMS. ACTIVITY WILL DIMINISH EARLY IN THE NIGHT  
AS THE UPPER LOW TRACKS EASTWARD. THURSDAY IS DRY AND COOLER  
WITH HIGH TEMPERATURES AROUND 5 DEGREES BELOW NORMAL. WINDS WILL  
BE BREEZY, WITH GUSTS OF 25-35 MPH IN THE SNAKE PLAIN EAST OF  
BOISE.  
   
LONG TERM...FRIDAY THROUGH TUESDAY
 
A STRONG HIGH PRESSURE  
CENTER OFF THE COAST OF SOUTHERN CALIFORNIA IS EXPECTED TO  
BUILD INTO THE AREA THROUGH FRIDAY AND THE WEEKEND, RETURNING A  
WARMING AND DRYING TREND. VALLEY DAYTIME TEMPERATURES ARE  
EXPECTED TO CLIMB BACK INTO THE LOWER 90S ON FRIDAY, MID 90S  
SATURDAY, AND UPPER 90S SUNDAY THROUGH TUESDAY. MONDAY AND  
TUESDAY WILL GENERALLY SEE A TROUGH FROM BRITISH COLUMBIA DIG  
INTO THE AREA, WITH CONSIDERABLE GUIDANCE UNCERTAINTY OVER ITS  
INTERACTION WITH ANOTHER TROUGH OVER THE OREGON/CALIFORNIA  
COAST. NORTHWESTERLY FLOW WOULD BE EXPECTED TUESDAY, AND  
ISOLATED SHOWERS/THUNDERSTORMS OVER HIGHER ELEVATIONS CANNOT BE  
RULED OUT.  
 

 
   
AVIATION
 
VFR UNDER MOSTLY CLEAR SKIES. ISOLATED SHOWERS AND  
THUNDERSTORMS DEVELOPING TUESDAY AFTERNOON ACROSS SE OREGON AND  
THE WEST-CENTRAL IDAHO MOUNTAINS. GUSTS UP TO 40 KT NEAR  
THUNDERSTORMS. HIGH DENSITY ALTITUDE DUE TO HOT TEMPERATURES ON  
TUESDAY. SURFACE WINDS: VARIABLE LESS THAN 10 KT, BECOMING SE-SW  
5-15 KT TUESDAY AFTERNOON. WINDS ALOFT AT 10KFT MSL: W 5-15 KT,  
BECOMING SE-SW AFTER TUE/12Z.  
 
KBOI...VFR. HIGH DENSITY ALTITUDE DUE TO HOT TEMPERATURES ON  
TUESDAY. SURFACE WINDS: SE 5-10 KT, BECOMING VARIABLE LESS THAN  
10 KT TUESDAY AFTERNOON.  
 

 
   
BOI WATCHES/WARNINGS/ADVISORIES
 
 
ID...HEAT ADVISORY FROM NOON TODAY TO 9 PM MDT THIS EVENING  
IDZ012-014.  
OR...HEAT ADVISORY FROM NOON MDT /11 AM PDT/ TODAY TO 9 PM MDT /8  
PM PDT/ THIS EVENING ORZ064.  
FIRE WEATHER WATCH FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY  
EVENING 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  
 
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