976  
FNUS75 KCYS 191453  
FWSCYS  
 
SPOT FORECAST FOR BALD MTN RX...USFS  
NATIONAL WEATHER SERVICE CHEYENNE WY  
853 AM MDT THU OCT 19 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON OCTOBER 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (307) 772-2227, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
DRY SOUTHWEST FLOW ALOFT CONTINUES TODAY THROUGH FRIDAY WITH STRENGTHENING  
WINDS ALOFT, ESPECIALLY ON FRIDAY. A STRONG COLD FRONT WILL APPROACH THE BURN  
LOCATION BY FRIDAY EVENING.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....AROUND 63.  
MIN HUMIDITY........15 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 9 TO 15 MPH.  
MIXING HEIGHT.......1000 FT AGL INCREASING TO 7100 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST AROUND 16 MPH.  
SMOKE DISPERSAL.....POOR TO EXCELLENT (11600-115700 KNOT-FT).  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....AROUND 38.  
MAX HUMIDITY........67 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 10 TO 14 MPH.  
MIXING HEIGHT.......1600-3200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 17 MPH.  
SMOKE DISPERSAL.....FAIR TO GOOD (28400-38500 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....AROUND 59.  
MIN HUMIDITY........25 PERCENT.  
WIND (20 FT)........BREEZY. SOUTHWEST WINDS 12 TO 18 MPH WITH  
HIGHER GUSTS INCREASING TO 22 TO 25 MPH WITH  
GUSTS TO AROUND 40 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1300 FT AGL INCREASING TO 7800 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST AROUND 36 MPH.  
SMOKE DISPERSAL.....GOOD TO EXCELLENT (31800-306600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 

 
FORECASTER...RUBIN  
REQUESTED BY...BRANDON BONENBERGER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1717550.0/CYS  
.EMAIL BBONENBERGER@FS.FED.US  
 
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