905  
FNUS72 KJAX 182025  
FWSJAX  
 
SPOT FORECAST FOR HICKORY SINK 08.18.26...UNIVERSITY OF FLORIDA  
NATIONAL WEATHER SERVICE JACKSONVILLE FL  
425 PM EDT TUE AUG 18 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 1715 EDT ON AUGUST 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (904) 741-4370 IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY
 
 
   
DISCUSSION
 
 
SHOWERS AND THUNDERSTORMS WILL BE BUILDING ACROSS THE VICINITY OF  
THE BURN SITE, WITH A POTENTIAL FOR SOME STORMS TO BECOME SEVERE  
WITH VARIABLE WIND GUSTS OF 58 MPH OR HIGHER AND HAIL OF 1/4 INCH  
OR LARGER. STORM CHANCES WILL DIMINISH DURING THE LATE NIGHT AND  
OVERNIGHT HOURS WITH PREVAILING WESTERLY WINDS BECOMING MORE MILD  
AND VARIABLE THROUGH WEDNESDAY MORNING. WINDS WILL BUILD TO ABOUT  
10 MPH WITH GUSTS OF ABOUT 15 MPH, WITH CHANCES FOR SHOWERS AND  
STORMS INCREASING THROUGH WEDNESDAY AFTERNOON BRINGING RAINFALL  
AND ERRATIC WINDS.  
   
REST OF TODAY
 
 
TIME (EDT) 5PM  
SKY (%).........57  
WEATHER COV.....CHC  
WEATHER TYPE....RW  
TSTM COV........CHC  
CHC OF PCPN (%).40  
CHC OF THDR (%).30  
TEMP............94  
RH..............58  
HEAT INDEX (F)..109  
WIND CHILL (F)..109  
20 FT WIND DIR..W  
20 FT WIND SPD..10  
20 FT WIND GUST.21  
MIX HGT (KFT)...3.6  
TRANSP WIND DIR.W  
TRANSP WIND SPD.14  
DISPERSION IDX..58  
LVORI...........1  
   
TONIGHT
 
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........61 61 59 55 51 53 43 37 45 43 40 38  
WEATHER COV.....CHC CHC CHC CHC CHC SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW RW  
TSTM COV........CHC CHC CHC SCH SCH  
CHC OF PCPN (%).40 40 40 30 30 20 20 10 10 10 10 10  
CHC OF THDR (%).30 40 30 20 20 10 10 10 0 0 0 0  
TEMP............92 90 87 84 83 82 81 80 79 79 78 78  
RH..............64 66 72 80 82 85 88 91 94 91 94 94  
HEAT INDEX (F)..107 103 99 94 92 90 88 87 79 79 78 78  
WIND CHILL (F)..107 103 99 94 92 90 88 87 79 79 78 78  
20 FT WIND DIR..W W SW SW W W W W W W W W  
20 FT WIND SPD..10 10 8 7 6 6 5 5 5 3 3 3  
20 FT WIND GUST.21 21 20 17 14 12 12 10 10 10 10 10  
MIX HGT (KFT)...2.6 1.7 0.8 0.7 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.W SW SW SW W W W W W W W W  
TRANSP WIND SPD.14 13 13 12 10 10 9 9 9 9 8 8  
DISPERSION IDX..46 29 11 8 7 7 6 5 5 4 4 4  
LVORI...........1 3 3 4 4 4 5 6 6 6 6 6  
   
WEDNESDAY
 
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........54 22 25 24 29 29 31 38 55 58 59 68  
WEATHER COV..... SCH CHC CHC CHC CHC  
WEATHER TYPE.... RW RW RW RW RW  
TSTM COV........ SCH CHC CHC CHC CHC  
CHC OF PCPN (%).10 10 0 0 10 10 10 20 30 40 40 50  
CHC OF THDR (%).0 0 0 0 10 10 10 20 30 40 40 50  
TEMP............78 77 78 83 87 91 92 94 95 95 93 92  
RH..............94 97 97 85 77 68 64 60 58 58 62 64  
HEAT INDEX (F)..78 77 78 93 101 108 107 110 112 112 109 107  
WIND CHILL (F)..78 77 78 93 101 108 107 110 112 112 109 107  
20 FT WIND DIR..W W W W W NW W W W W W W  
20 FT WIND SPD..3 3 5 5 6 6 7 7 7 7 8 9  
20 FT WIND GUST.10 10 10 12 12 10 10 12 13 13 13 14  
MIX HGT (KFT)...0.5 0.5 0.5 1.2 1.8 2.4 3.1 3.9 4.7 4.1 3.5 2.9  
TRANSP WIND DIR.W W W W NW NW NW NW W W W W  
TRANSP WIND SPD.8 8 8 8 8 8 8 9 9 9 9 10  
DISPERSION IDX..4 4 8 12 19 26 33 42 49 45 42 37  
LVORI...........6 8 6 4 3 3 1 1 1 1 1 1  
 

 
FORECASTER...CORLESS  
REQUESTED BY...CULLY LORD  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2619890.1/JAX  
.DELDT 08/18/26  
.FORMATTERVERSION 2.0.0  
.EMAIL CULLY@UFL.EDU  
 
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