043  
FNUS74 KBRO 131438  
FWSBRO  
 
SPOT FORECAST FOR WINTON PILE BURN...U.S.FISH & WILDLIFE SERVICE  
NATIONAL WEATHER SERVICE BROWNSVILLE TX  
938 AM CDT FRI JUL 13 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON JULY 13.  
IF CONDITIONS BECOME UNREPRESENTATIVE,CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SURFACE LOW PRESSURE ACROSS WEST TEXAS AND SURFACE  
HIGH PRESSURE ACROSS THE GULF OF MEXICO WILL PROVIDE SOUTHEAST  
WINDS ACROSS THE RIO GRANDE VALLEY TODAY. ISOLATED SHOWERS AND  
THUNDERSTORMS WILL DEVELOP ACROSS THE COASTAL SECTIONS OF DEEP SOUTH  
TEXAS THIS AFTERNOON AND MOVE INLAND AS THE SEABREEZE FRONT DEVELOPS  
ALONG THE LOWER TEXAS COAST AND MOVES WESTWARD.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS.  
TEMPERATURE.........87 AT IGNITION...MAX 97.  
RH..................65 PERCENT AT IGNITION...MIN 41 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS 9 TO 13 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......WINDS SOUTH AT 8 MPH AT IGNITION...OTHERWISE  
SOUTHEAST WINDS 9 TO 13 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS.  
MIXING HEIGHT.......3700 FT AGL AT IGNITION...OTHERWISE 3700-4900  
FT AGL INCREASING TO 5900-7000 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTHEAST 14 TO 17 MPH.  
 
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........30 30 30 30 30 30 30 30  
WEATHER COV.....SCH SCH SCH SCH SCH SCH SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW RW RW  
TSTM COV........SCH SCH SCH SCH SCH SCH SCH SCH  
TEMP............87 90 93 95 97 97 96 94  
RH..............65 55 48 44 42 41 42 47  
20 FT WIND DIR..160 160 150 140 140 140 130 140  
20 FT WIND SPD..9 10 10 10 10 10 12 13  
20 FT WIND GUST.11 13 13 13 13 13 14 16  
EYE LVL WND DIR.160 160 150 140 140 140 130 140  
EYE LVL WND SPD.6 7 7 7 7 7 8 8  
EYE LVL WND GST.8 10 10 10 10 10 11 12  
MIX HGT (KFT)...3.7 4.9 5.9 6.6 6.9 7.0 6.7 6.2  
TRANSP WIND DIR.160 160 150 150 140 140 140 130  
TRANSP WIND SPD.16 17 16 15 14 15 16 17  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING.  
TEMPERATURE.........MIN 77.  
RH..................MAX 89 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS 7 TO 14 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 7 TO 14 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING.  
MIXING HEIGHT.......4300-5400 FT AGL DECREASING TO 100-600 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 14 TO 22 MPH DECREASING TO 10 TO 12  
MPH AFTER MIDNIGHT.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........30 20 20 20 20 20 20 20 20 20 20 20  
WEATHER COV.....SCH  
WEATHER TYPE....RW  
TSTM COV........SCH  
TEMP............93 92 89 86 84 83 81 81 79 79 79 78  
RH..............47 50 57 64 71 76 81 81 87 88 87 89  
20 FT WIND DIR..140 130 140 140 140 140 140 140 150 150 150 140  
20 FT WIND SPD..14 14 13 12 10 9 8 8 8 7 7 7  
20 FT WIND GUST.17 17 16 14 13 12 11 10 10 8 8 8  
EYE LVL WND DIR.140 130 140 140 140 140 140 140 150 150 150 140  
EYE LVL WND SPD.9 9 8 8 7 6 5 4 4 4 4 4  
EYE LVL WND GST.13 13 12 10 10 9 8 8 8 6 6 6  
MIX HGT (KFT)...5.4 4.3 2.9 1.6 0.6 0.2 0.1 0.3 0.5 0.6 0.5 0.2  
TRANSP WIND DIR.130 140 140 140 140 140 140 140 150 150 150 150  
TRANSP WIND SPD.20 22 21 18 16 14 12 10 10 12 12 10  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.  
TEMPERATURE.........MAX 97.  
RH..................MIN 44 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS 6 TO 14 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 6 TO 14 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS IN THE  
AFTERNOON.  
MIXING HEIGHT.......0-1000 FT AGL INCREASING TO 6400-7400 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 8 TO 17 MPH INCREASING TO 16 TO 20  
MPH LATE IN THE MORNING.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........20 34 42 42 40 42  
WEATHER COV..... S CHC S CHC  
WEATHER TYPE....NONE NONE NONE NONE RNSHWR RNSHWR  
TSTM COV........ S CHC S CHC  
TEMP............78 80 87 93 97 97  
RH..............89 86 66 51 44 45  
20 FT WIND......140/6 140/8 150/10 140/12 150/13 140/14  
20 FT WIND GUST.7 10 13 14 14 17  
EYE LEVEL WIND..140/4 140/4 150/7 140/8 150/8 140/9  
EYE LVL WND GST.5 8 10 11 11 13  
MIX HGT (FT)....BLW100 1000 3700 6200 7400 7100  
TRANSPORT WIND..140/8 150/10 150/17 150/17 150/16 150/18  
 

 
FORECASTER...CASTILLO  
REQUESTED BY...DON DEVRIENDT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1812757.0/BRO  
.DELDT 07/13/18  
.EMAIL DONALD_DEVRIENDT@FWS.GOV  
 
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