530  
FNUS74 KOUN 051434  
FWSOUN  
 
SPOT FORECAST FOR RX 20-15...FORT SILL  
NATIONAL WEATHER SERVICE NORMAN OK  
834 AM CST THU DEC 5 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CST ON DECEMBER 05.  
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
 
 
SOUTHERLY WINDS WILL GRADUALLY VEER TO THE SOUTH-SOUTHWEST LATE  
MORNING. WINDS WILL RETURN TOWARD THE SOUTH BY VERY LATE  
AFTERNOON. A COLD FRONT/NORTHERLY WIND SHIFT IS EXPECTED TO MOVE  
THROUGH EARLY TO MID EVENING (BETWEEN APPROXIMATELY 7 AND 9 PM)  
TODAY. THERE IS A VERY LOW CHANCE (LESS THAN 15%) OF LIGHT SHOWERS  
THIS EVENING.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
TEMPERATURE.........53 AT IGNITION...MAX 69.  
RH..................61 PERCENT AT IGNITION...MIN 42 PERCENT.  
WIND (20 FT)........WINDS SOUTHWEST AT 7 MPH AT  
IGNITION...OTHERWISE SOUTHWEST WINDS 6 TO 10  
MPH.  
MIXING HEIGHT.......800 FT AGL AT IGNITION...OTHERWISE 3300 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 13 TO 21 MPH.  
SMOKE DISPERSAL.....FAIR /25900 KNOT-FT/ AT IGNITION. MAX...GOOD  
/30200 KNOT-FT/.  
 
TIME (CST) 10 AM NOON 2 PM 4 PM  
SKY (%).........11 9 9 15  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
TEMP............53 62 67 68  
RH..............61 48 43 43  
20 FT WIND DIR..SW SW SW SW  
20 FT WIND SPD..8 9 9 9  
20 FT WIND GUST.10 13 13 13  
MIX HGT (FT)....800 1800 3200 2400  
TRANSPORT WIND..S 17 SW 20 SW 21 SW 16  
VRATE KTFT/1000.26 30 22 9  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).  
TEMPERATURE.........MIN 40.  
RH..................MAX 76 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH SHIFTING TO THE NORTH 8  
TO 17 MPH WITH GUSTS TO AROUND 22 MPH IN THE  
LATE EVENING AND OVERNIGHT, THEN INCREASING TO  
17 TO 18 MPH WITH GUSTS TO AROUND 23 MPH  
OVERNIGHT.  
MIXING HEIGHT.......0 FT AGL.  
TRANSPORT WINDS.....WEST 8 TO 15 MPH SHIFTING TO THE NORTH 18 TO 23  
MPH LATE IN THE EVENING, THEN INCREASING TO 28  
TO 33 MPH OVERNIGHT.  
SMOKE DISPERSAL.....FAIR (19000 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (0 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........30 30 22 13 13 5  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............61 57 54 52 49 46  
RH..............53 59 61 66 68 68  
20 FT WIND DIR..S S NW N N N  
20 FT WIND SPD..6 5 12 16 18 17  
20 FT WIND GUST.8 7 14 20 23 22  
MIX HGT (FT)....100 BLW100 100 300 400 600  
TRANSPORT WIND..S 9 SW 9 W 15 N 23 N 31 N 33  
VRATE KTFT/1000.0 0 2 6 10 16  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (15-25 PERCENT).  
TEMPERATURE.........MAX 52.  
RH..................MIN 52 PERCENT.  
WIND (20 FT)........NORTH WINDS 10 TO 18 MPH WITH GUSTS TO AROUND  
23 MPH DECREASING TO AROUND 7 MPH LATE IN THE  
AFTERNOON.  
MIXING HEIGHT.......2400 FT AGL.  
TRANSPORT WINDS.....NORTH 22 TO 31 MPH DECREASING TO 12 TO 20 MPH  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (6600 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (36400 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CST) 6 AM 9 AM NOON 3 PM  
SKY (%).........6 32 22 10  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
TEMP............44 43 49 52  
RH..............70 73 58 52  
20 FT WIND DIR..N N N N  
20 FT WIND SPD..17 18 16 13  
20 FT WIND GUST.22 23 20 16  
MIX HGT (FT)....800 1300 1900 2300  
TRANSPORT WIND..N 31 N 29 N 22 N 16  
VRATE KTFT/1000.22 33 36 20  
 

 
FORECASTER...MAHALE  
REQUESTED BY...JAY YOUNG  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1919744.0/OUN  
.DELDT 12/05/19  
.FORMATTERVERSION 1.0.26  
.EMAIL JAY.A.YOUNG24.CIV@MAIL.MIL  
 
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