373  
FNUS75 KBOI 182147  
FWSBOI  
 
SPOT FORECAST FOR CROOKED FIRE...USFS  
NATIONAL WEATHER SERVICE BOISE ID  
347 PM MDT FRI SEP 18 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON SEPTEMBER 19.  
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.  
   
..SHOWERS AND THUNDERSTORM CHANCES CONTINUE SATURDAY  
   
..WARMING TEMPERATURES THIS WEEKEND  
 
   
DISCUSSION  
 
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO CONTINUE FROM THE  
OVERNIGHT PERIOD THROUGH LATE SATURDAY AFTERNOON OVER CENTRAL  
IDAHO. OVERALL CHANCES NEAR THE VICINITY OF THE FIRE ARE LOW  
(RANGING FROM 10-15%), HOWEVER SHOULD A THUNDERSTORM MOVE NEARBY,  
IT WOULD BE CAPABLE OF PRODUCING GUSTY WINDS AND LIGHTNING. COOLER  
TEMPERATURES ARE EXPECTED SATURDAY, PROMOTING HIGH RELATIVE  
HUMIDITY IN THE AFTERNOON AND GOOD RH RECOVERY. SUNDAY THROUGH  
EARLY NEXT WEEK BRING A WARMING AND DRYING TREND.  
   
SATURDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. A  
SLIGHT CHANCE OF THUNDERSTORMS FROM MORNING  
THROUGH THE AFTERNOON. CHANCE OF PRECIPITATION  
15 PERCENT.  
MAX TEMPERATURE.....62 TO 67.  
MIN HUMIDITY........41 TO 47 PERCENT.  
CWR.................10 PERCENT.  
WIND - 20 FOOT......NORTHWEST AROUND 5 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS  
MIXING HEIGHT.......5500 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.  
VENTILATION INDEX...550 GOOD.  
   
SATURDAY NIGHT  
 
SKY/WEATHER.........MOSTLY CLOUDY IN THE EVENING, THEN CLEARING.  
MIN TEMPERATURE.....41 TO 46.  
MAX HUMIDITY........79 TO 88 PERCENT.  
CWR.................0 PERCENT.  
WIND - 20 FOOT......NORTH AROUND 5 MPH.  
MIXING HEIGHT.......200 FT AGL.  
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.  
VENTILATION INDEX...10 POOR.  
   
SUNDAY  
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....69 TO 74.  
MIN HUMIDITY........29 TO 34 PERCENT.  
CWR.................0 PERCENT.  
WIND - 20 FOOT......NORTHEAST AROUND 6 MPH IN THE MORNING SHIFTING  
TO THE WEST 3 TO 5 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......6500 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 5 MPH.  
VENTILATION INDEX...325 FAIR.  
 
 
FORECASTER...HOOD  
REQUESTED BY...SKY DWINELL  
TYPE OF REQUEST...WILDFIRE  
.TAG 2622087.0/BOI  
.DELDT 09/19/26  
.FORMATTERVERSION 2.0.0  
.EMAIL 2026.CROOKED.PLANS@FIRENET.GOV,SCOTT.STEARNS@NOAA.GOV  
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