735  
FNUS74 KOUN 191935  
FWSOUN  
 
SPOT FORECAST FOR RX 17-27...FORT SILL FIRE  
NATIONAL WEATHER SERVICE NORMAN OK  
235 PM CDT TUE SEP 19 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1500 CDT ON SEPTEMBER 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (405) 325-3816 IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
ANOTHER BREEZY DAY EXPECTED TOMORROW WITH SOUND WINDS AROUND 15 MPH  
DEVELOPING DURING THE LATE MORNING HOURS AND CONTINUING THROUGH THE  
EARLY EVENING. MINRH WILL REMAIN RATHER HIGH THOUGH. SMOKE DISPERSAL  
SHOULD ALSO BE EXCELLENT.  
   
WEDNESDAY
 
 
SKY/WEATHER.........SUNNY (15-25 PERCENT).  
MAX TEMPERATURE.....AROUND 95.  
MIN HUMIDITY........44 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTH WINDS 10 TO 15 MPH. GUSTS UP TO 25 MPH IN  
THE LATE MORNING AND AFTERNOON.  
MIXING HEIGHT.......200-1800 FT AGL, INCREASING TO 7600-9200 FT  
AGL.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
SMOKE DISPERSAL.....POOR TO GOOD (2800-49200 KNOT-FT), INCREASING  
TO EXCELLENT (62000 KNOT-FT) LATE IN THE  
MORNING.  
 
TIME (CDT) 3 PM 5 PM  
SKY (%).........30 30  
WEATHER COV.....  
WEATHER TYPE....NONE NONE  
TSTM COV........  
TEMP............94 95  
RH..............46 45  
20 FT WIND......S 14 S 13  
20 FT WIND GUST.20 20  
MIX HGT (FT)....8400 7600  
TRANSPORT WIND..SW 20 S 21  
VRATE KTFT/1000100 106  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). ISOLATED SHOWERS  
AND THUNDERSTORMS IN THE EVENING.  
MIN TEMPERATURE.....AROUND 75.  
MAX HUMIDITY........86 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTH WINDS 9 TO 13 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS IN THE  
EVENING.  
MIXING HEIGHT.......5100 FT AGL, DECREASING TO 300-700 FT AGL.  
TRANSPORT WINDS.....SOUTH 9 TO 13 MPH.  
SMOKE DISPERSAL.....GOOD TO EXCELLENT (56400-102200 KNOT-FT),  
DECREASING TO POOR TO GOOD (0-37500 KNOT-FT) IN  
THE LATE EVENING AND OVERNIGHT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........30 50 50 50 46 46  
WEATHER COV..... ISOLTD ISOLTD ISOLTD  
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR NONE NONE  
TSTM COV........ ISOLTD ISOLTD ISOLTD  
TEMP............94 88 84 82 78 78  
RH..............44 54 63 66 70 75  
20 FT WIND......S 13 S 10 S 9 S 10 S 10 S 10  
20 FT WIND GUST.20 15 15 15 15 15  
MIX HGT (FT)....5100 1500 500 400 700 700  
TRANSPORT WIND..S 23 S 21 S 16 S 18 S 21 S 21  
VRATE KTFT/1000102 75 38 7 0 2  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
MAX TEMPERATURE.....AROUND 94.  
MIN HUMIDITY........46 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTH WINDS 12 TO 16 MPH. GUSTS UP TO 25 MPH  
EARLY IN THE MORNING.  
MIXING HEIGHT.......700-2500 FT AGL, INCREASING TO 5500 FT AGL.  
TRANSPORT WINDS.....SOUTH 12 TO 16 MPH.  
SMOKE DISPERSAL.....POOR TO GOOD (12200-53300 KNOT-FT), INCREASING  
TO EXCELLENT (65200 KNOT-FT) IN THE AFTERNOON.  
 

 
FORECASTER...BARNES  
REQUESTED BY...RANDALE YORK  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1716035.0/OUN  
.EMAIL RANDALE.D.YORK.CIV@MAIL.MIL  
 
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