723  
FNUS75 KBOI 201747  
FWSBOI  
 
SPOT FORECAST FOR BOX...BLM  
NATIONAL WEATHER SERVICE BOISE ID  
1147 AM MDT WED AUG 20 2025  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON AUGUST 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (208)334-9060, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
..HOT AND DRY WITH BREEZY AFTERNOON WINDS  
 
   
DISCUSSION  
 
TEMPERATURES WILL BE SIMILAR TO YESTERDAY, WITH SLIGHTLY DRIER  
CONDITIONS AND POOR OVERNIGHT RELATIVE HUMIDITY RECOVERIES. WINDS  
WILL BE PRIMARILY OUT OF THE NORTH-NORTHEAST, WITH SOME TERRAIN  
ENHANCEMENT IN THE AFTERNOON. A SIGNIFICANT PATTERN SHIFT IS STILL  
ON DECK FOR LATE SATURDAY INTO SUNDAY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS WITH MINIMAL PRECIPITATION.  
   
THURSDAY  
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....90 TO 95.  
MIN HUMIDITY........12 TO 18 PERCENT.  
CWR.................0 PERCENT.  
WIND - 20 FOOT......NORTH TO NORTHEAST AROUND 10-15 MPH WITH AFTERNOON  
GUSTS 20-30 MPH.  
MIXING HEIGHT.......9000 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
VENTILATION INDEX...1800 EXCELLENT.  
   
THURSDAY NIGHT  
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....60 TO 65.  
MAX HUMIDITY........28 TO 33 PERCENT.  
CWR.................0 PERCENT.  
WIND - 20 FOOT......NORTHEAST AROUND 9 MPH. GUSTS UP TO 20 MPH IN  
THE LATE EVENING.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....EAST AROUND 20 MPH.  
VENTILATION INDEX...60 POOR.  
   
FRIDAY  
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....95 TO 100.  
MIN HUMIDITY........10 TO 16 PERCENT.  
CWR.................0 PERCENT.  
WIND - 20 FOOT......NORTHEAST AROUND 5-8 MPH.  
MIXING HEIGHT.......12000 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
VENTILATION INDEX...1200 EXCELLENT.  
 
 
FORECASTER...ADAMS  
REQUESTED BY...IDAHO TEAM 1  
TYPE OF REQUEST...WILDFIRE  
.TAG 2520324.0/BOI  
.DELDT 08/21/25  
.FORMATTERVERSION 2.0.0  
.EMAIL 2025.BOX.PLANS@FIRENET.GOV  
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