300  
FNUS75 KBOI 191155  
FWSBOI  
 
SPOT FORECAST FOR RATTLESNAKE CREEK...USFS  
NATIONAL WEATHER SERVICE BOISE ID  
555 AM MDT WED SEP 19 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON SEPTEMBER 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
..DRY AND SLIGHTLY COOLER THROUGH THURSDAY
 
 
   
DISCUSSION
 
 
A TROUGH MOVING ACROSS THE PACIFIC NORTHWEST WILL BRING SOME  
CLOUDS INTO THE AREA THIS AFTERNOON AND EVENING, BUT  
PRECIPITATION IS NOT EXPECTED. NORTHWEST FLOW ALOFT WILL FOLLOW  
THE EXITING TROUGH TONIGHT, WITH COOLER AND DRY CONDITIONS  
PERSISTING THROUGH THURSDAY.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....52 RIDGETOPS TO 67 VALLEYS.  
MIN HUMIDITY........25 PERCENT VALLEYS TO 35 PERCENT RIDGETOPS.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1.  
WIND - EYE LEVEL....NORTH 3 TO 7 MPH.  
MIXING HEIGHT.......6500 FT AGL.  
TRANSPORT WINDS.....NORTH AROUND 10 MPH.  
HAINES INDEX........3 VERY LOW.  
VENTILATION INDEX...650 GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY IN THE EVENING, THEN BECOMING  
CLEAR AFTER MIDNIGHT.  
MIN TEMPERATURE.....37 TO 42.  
MAX HUMIDITY........55 TO 65 PERCENT.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1.  
WIND - EYE LEVEL....NORTHWEST 3 TO 8 MPH.  
MIXING HEIGHT.......200 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.  
HAINES INDEX........2 VERY LOW.  
VENTILATION INDEX...10 POOR.  
   
THURSDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....51 RIDGETOPS TO 66 VALLEYS.  
MIN HUMIDITY........25 PERCENT VALLEYS TO 35 PERCENT RIDGETOPS.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1.  
WIND - EYE LEVEL....LIGHT LESS THAN 3 MPH BECOMING SOUTHWEST  
3 TO 6 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......7000 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
HAINES INDEX........3 VERY LOW.  
VENTILATION INDEX...1050 EXCELLENT.  
 

 
FORECASTER...WOJCIK  
REQUESTED BY...PAYETTE DISPATCH  
TYPE OF REQUEST...WILDFIRE  
.TAG 1815391.5/BOI  
 
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