621  
FNUS75 KBOI 151515  
FWSBOI  
 
SPOT FORECAST FOR ROCKY BEAR RX...PAYETTE NF  
NATIONAL WEATHER SERVICE BOISE ID  
915 AM MDT SUN SEP 15 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON SEPTEMBER 15.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
...GUSTY WINDS EXPECTED OVER THE RIDGES TODAY AHEAD OF A COLD FRONT...   
..ABOVE NORMAL TEMPERATURES AND UNSTABLE TODAY
 
 
   
DISCUSSION
 
 
A SLOW MOVING COLD FRONT PUSHES ACROSS THE PACIFIC NORTHWEST  
TODAY AND IS EXPECTED TO MOVE INTO THE BURN AREA MONDAY AFTERNOON.  
STRONG AND GUSTY SOUTHWEST WINDS OUT AHEAD OF THE FRONT SHOULD  
SPREAD OVER THE HIGHER TERRAIN ALONG WITH THE DRAINAGE TO THE WEST  
OF THE BURN UNIT. THE BIGGEST CONCERN WOULD BE HOW ERRATIC WINDS  
BECOME DUE TO THE TERRAIN AND THE STRONG WINDS OVER THE RIDGES  
THIS AFTERNOON THROUGH THE EVENING HOURS.  
 
ANY QUESTIONS, PLEASE CALL THE NWS IN BOISE.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....79 TO 84.  
MIN HUMIDITY........12 TO 17 PERCENT.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1.  
WIND - EYE LEVEL....UPSLOPE 2 TO 4 MPH THIS AFTERNOON, BUT MAY BECOME  
ERRATIC AND GUSTY TO 12 MPH THIS AFTERNOON.  
MIXING HEIGHT.......6500 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 30 MPH.  
HAINES INDEX........3 VERY LOW.  
VENTILATION INDEX...1950 EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....47 TO 52.  
MAX HUMIDITY........48 TO 53 PERCENT.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1.  
WIND - EYE LEVEL....DOWNSLOPE 1 TO 3 MPH, BUT POTENTIALLY GUSTY AND ERRATIC TO 10 MPH.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.  
HAINES INDEX........4 LOW.  
VENTILATION INDEX...15 POOR.  
   
MONDAY
 
 
SKY/WEATHER.........PARTLY SUNNY. A 20 PERCENT CHANCE OF SHOWERS  
AND THUNDERSTORMS IN THE AFTERNOON.  
MAX TEMPERATURE.....67 TO 72.  
MIN HUMIDITY........26 TO 31 PERCENT.  
CWR /0.10 INCH/.....0 PERCENT.  
LAL.................1 IN THE MORNING, INCREASING TO 2 IN THE  
AFTERNOON.  
WIND - EYE LEVEL....WEST TO SOUTHWEST 3 TO 5 MPH.  
MIXING HEIGHT.......6500 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH...SHIFTING WEST BY LATE AFTERNOON.  
HAINES INDEX........4 LOW.  
VENTILATION INDEX...1300 EXCELLENT.  
 

 
FORECASTER...REDMAN  
REQUESTED BY...WILL WOODS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1915476.1/BOI  
 
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