687  
FNUS74 KFWD 171425  
FWSFWD  
 
SPOT FORECAST FOR RANGER HILL PILE BURN...TFS MERKEL  
NATIONAL WEATHER SERVICE FORT WORTH TX  
825 AM CST FRI FEB 17 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 CST ON FEBRUARY 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
AN UNSEASONABLY WARM DAY IS EXPECTED WITH BREEZY SOUTH WINDS. FROM  
LATE MORNING THROUGH THE AFTERNOON HOURS, SOME GUSTS WILL EXCEED  
20 MPH. WITH TEMPERATURES INTO THE 70S THIS AFTERNOON, THE  
RELATIVE HUMIDITY WILL FALL BELOW 35 PERCENT. THE WINDS WILL  
SUBSIDE AROUND SUNSET, BUT SOUTH WINDS WILL PREVAIL THROUGH THE  
NIGHT. RAIN CHANCES RETURN SUNDAY.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).  
MAX TEMPERATURE.....AROUND 73.  
MIN HUMIDITY........33 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 13 MPH.  
MIXING HEIGHT.......200-300 FT AGL INCREASING TO 8700 FT AGL.  
TRANSPORT WINDS.....SOUTH 17 TO 26 MPH.  
HAINES INDEX........4 TO 5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........24 30 35 40 37 35 32 29 27  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............52 56 59 63 67 71 73 73 71  
RH..............63 57 53 48 42 35 33 33 36  
20 FT WIND DIR..S S S S S S S S S  
20 FT WIND SPD..9 10 12 13 13 13 13 12 10  
20 FT WIND GUST.10 15 20 20 20 20 20 20 15  
MIX HGT (KFT)...0.3 M M 2.5 M M 8.7 M M  
TRANSP WIND DIR.S S S S S S S S S  
TRANSP WIND SPD.20 22 24 25 26 26 25 24 23  
HAINES INDEX....4 4 4 5 5 5 5 5 5  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).  
MIN TEMPERATURE.....AROUND 47.  
MAX HUMIDITY........83 PERCENT.  
WIND (20 FT)........SOUTH WINDS 6 TO 9 MPH.  
MIXING HEIGHT.......5800 FT AGL DECREASING TO 100-400 FT AGL IN THE  
LATE EVENING AND EARLY MORNING.  
TRANSPORT WINDS.....SOUTH 14 TO 22 MPH DECREASING TO 10 TO 12 MPH  
EARLY IN THE MORNING.  
HAINES INDEX........4 TO 5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........24 24 23 23 23 22 22 22 21 21 21 21  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............68 65 61 58 57 55 54 53 51 50 49 48  
RH..............40 46 58 67 67 72 71 74 80 83 83 80  
20 FT WIND DIR..S S S SE S S S S S S S S  
20 FT WIND SPD..9 8 8 8 8 8 8 8 8 7 6 6  
20 FT WIND GUST.10 10 10 10 10 10 10 10 10 10  
MIX HGT (KFT)...5.8 M M 0.4 M M 0.1 M M 0.1 M M  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.22 21 21 20 20 20 18 17 15 14 12 10  
HAINES INDEX....5 5 5 5 5 5 4 4 4 4 4 4  
 

 
FORECASTER...HUCKABY  
REQUESTED BY...M. PETERS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1702363.0/FWD  
.EMAIL MPETERS@TFS.TAMU.EDU  
 
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