451  
FNUS72 KJAX 260824  
FWSJAX  
 
SPOT FORECAST FOR RIVER RISE ZONE 2E...FLORIDA PARK SERVICE  
NATIONAL WEATHER SERVICE JACKSONVILLE FL  
424 AM EDT FRI APR 26 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON APRIL 26.  
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.  
   
..HIGH DAYTIME DISPERSIONS THIS WEEKEND
 
 
   
DISCUSSION
 
 
EASTERLY SURFACE AND TRANSPORT WINDS DEVELOP THIS AFTERNOON AND  
INCREASE INTO SATURDAY. THIS INCREASE IN TRANSPORT FLOW WILL  
LEAD TO ELEVATED DISPERSIONS TODAY AND HIGH DISPERSIONS ON  
SATURDAY DURING THE AFTERNOON HOURS. SUSTAINED WINDS DURING THE  
DAY WILL BE AROUND 10-15 MPH WITH GUSTS AROUND 20 MPH. MIN RHS  
WILL DIP INTO THE MID 30S THIS AFTERNOON. WITH MOISTENING ONSHORE  
FLOW, MIN RHS WILL GRADUALLY INCREASE THIS WEEKEND.  
   
TODAY
 
 
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........16 15 13 12 23 34 45 49 53 57  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 10  
LAL.............1 1 1 1 1 1 1 1 1 1  
TEMP............62 70 76 81 83 85 87 88 87 86  
RH..............90 68 56 47 44 40 36 35 36 37  
HEAT INDEX (F)..60 65 73 77 81 83 85 85 85 85  
WIND CHILL (F)..60 65 73 77 80 83 85 85 85 85  
20 FT WIND DIR..N SE SE SE SE SE E E E E  
20 FT WIND SPD..0 1 3 6 6 7 8 9 10 12  
20 FT WIND GUST. 2 6 9 9 10 13 14 16 17  
MIX HGT (KFT)...0.3 1.6 2.9 4.2 5.3 6.3 7.4 6.9 6.5 6.0  
TRANSP WIND DIR.SE SE SE SE SE E E E E E  
TRANSP WIND SPD.5 5 7 8 8 7 8 9 10 12  
DISPERSION IDX..4 11 24 40 49 52 60 66 62 56  
LVORI...........6 3 2 1 1 1 1 1 1 1  
   
TONIGHT
 
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........49 40 32 32 31 31 33 36 38 40 42 44  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............84 81 76 73 70 68 66 66 65 64 63 63  
RH..............41 46 54 62 68 76 81 84 90 93 97 97  
HEAT INDEX (F)..83 82 79 73 71 69 68 67 65 65 64 64  
WIND CHILL (F)..83 81 79 73 71 69 68 67 65 65 64 64  
20 FT WIND DIR..E E E E E E E E E E E E  
20 FT WIND SPD..13 13 13 12 9 8 7 6 6 5 3 2  
20 FT WIND GUST.20 20 20 17 14 13 10 9 9 7 6 3  
MIX HGT (KFT)...4.2 2.4 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.3  
TRANSP WIND DIR.E E E E E E E E E E E E  
TRANSP WIND SPD.14 14 15 14 13 12 12 12 12 10 9 9  
DISPERSION IDX..51 40 13 9 8 7 5 5 5 5 4 4  
LVORI...........1 1 2 2 3 4 4 5 6 6 7 6  
   
SATURDAY
 
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........43 42 41 46 47 57 57 57 57 56 55 54  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 10 10 10 10 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............62 62 64 67 72 75 79 80 81 81 81 81  
RH..............100 100 93 84 71 64 56 52 51 49 49 47  
HEAT INDEX (F)..64 65 65 69 73 77 79 81 83 83 83 82  
WIND CHILL (F)..64 65 65 69 73 77 79 80 82 82 82 82  
20 FT WIND DIR..E E E E E E E E E E E E  
20 FT WIND SPD..3 6 7 8 9 10 12 12 13 13 14 15  
20 FT WIND GUST.6 9 10 13 15 16 17 17 18 20 21 22  
MIX HGT (KFT)...0.4 0.5 0.5 1.8 3.0 4.3 4.7 5.2 5.6 5.7 5.7 5.8  
TRANSP WIND DIR.E E E E E E E E E E E E  
TRANSP WIND SPD.9 10 12 14 16 18 20 20 20 20 20 20  
DISPERSION IDX..4 7 13 33 63 71 58 61 63 63 64 87  
LVORI...........7 8 5 4 3 1 1 1 1 1 1 1  
 

 
FORECASTER...CHANEY  
REQUESTED BY...DENNIS PARSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2412458.0/JAX  
.DELDT 04/26/24  
.FORMATTERVERSION 2.0.0  
.EMAIL DENNIS.PARSON@FLORIDADEP.GOV  
 
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