832
FNUS72 KJAX 090551
FWSJAX
SPOT FORECAST FOR FCSF RX...FLORIDA FOREST SERVICE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
151 AM EDT THU JUL 9 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON JULY 09.
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 THIS MORNING TO 8 PM EDT
THIS EVENING...
..HIGH DAYTIME DISPERSION TODAY AND FRIDAY
DISCUSSION
A WEST TO SOUTHWEST FLOW WILL CONTINUE TODAY WITH A LOW CHANCE FOR
A SHOWER OR THUNDERSTORM. GIVEN THE BREEZIER TRANSPORT WIND AND
FAIRLY HIGH MIXING HEIGHT, DAYTIME DISPERSION INDICES WILL
REACH ABOVE 75 TODAY AND FRIDAY.
VERY HOT AGAIN TODAY WITH MAX TEMPERATURES IN THE UPPER 90S WITH
A HEAT ADVISORY IN PLACE. SIMILAR WEATHER PATTERN EXPECTED
ON FRIDAY WITH SLIGHTLY HIGHER CHANCE FOR SHOWERS OR A STORM
AROUND 20 PERCENT.
MINIMUM RH VALUES OF ABOUT 36 TO 42 PERCENT ARE EXPECTED TODAY AND
FRIDAY.
TODAY
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........18 16 20 19 22 25 29 32 35 35
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 10 10 10
TEMP............80 84 88 91 94 96 97 98 99 99
RH..............88 77 66 59 51 46 45 43 42 41
HEAT INDEX (F)..79 93 98 101 103 105 106 107 109 108
20 FT WIND DIR..W W W W SW SW SW SW SW SW
20 FT WIND SPD..5 5 5 6 7 7 8 8 8 8
20 FT WIND GUST.8 8 9 12 12 13 14 14 14 14
MIX HGT (KFT)...1.1 2.1 3.1 4.0 4.9 5.8 6.7 7.0 7.3 7.6
TRANSP WIND DIR.W W W W W W W W W W
TRANSP WIND SPD.10 10 10 10 10 12 12 12 13 13
DISPERSION IDX..13 27 41 53 61 75 83 86 97 99
LVORI...........4 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 (%).........38 39 45 43 35 30 25 23 17 16 15 18
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).10 10 10 10 10 0 0 0 0 0 0 0
CHC OF THDR (%).10 10 10 10 10 0 0 0 0 0 0 0
TEMP............98 95 92 88 86 84 83 82 81 79 79 78
RH..............42 46 52 59 63 67 70 72 72 77 79 82
HEAT INDEX (F)..106 103 100 95 92 90 88 87 85 79 79 78
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..8 7 6 5 5 5 5 3 3 3 2 2
20 FT WIND GUST.14 12 10 10 10 10 9 8 8 7 7 6
MIX HGT (KFT)...5.4 3.3 1.1 0.9 0.7 0.5 0.5 0.5 0.5 0.5 0.4 0.4
TRANSP WIND DIR.W SW SW SW W W W W W W W W
TRANSP WIND SPD.12 10 10 9 9 8 8 8 8 8 8 8
DISPERSION IDX..72 45 7 6 4 4 4 4 4 4 4 4
LVORI...........1 1 2 3 3 3 3 3 3 4 4 5
FRIDAY
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 20 11 16 25 37 26 34 37 38 39 45
WEATHER COV..... SCH SCH SCH
WEATHER TYPE.... RW RW RW
TSTM COV........ SCH SCH SCH
CHC OF PCPN (%).0 0 0 0 0 0 0 0 10 20 20 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 10 20 20 20
TEMP............77 77 79 83 88 91 94 95 97 98 98 99
RH..............85 85 85 77 66 56 49 46 42 41 39 37
HEAT INDEX (F)..77 77 79 90 98 100 102 103 104 105 104 105
20 FT WIND DIR..SW SW W W W W W W SW SW SW SW
20 FT WIND SPD..2 2 2 2 3 5 7 7 7 7 7 7
20 FT WIND GUST.6 6 3 3 5 8 9 12 13 13 14 13
MIX HGT (KFT)...0.6 0.7 0.9 1.9 2.9 3.9 4.7 5.6 6.4 6.3 6.2 6.1
TRANSP WIND DIR.W W W W W W W W W W SW SW
TRANSP WIND SPD.8 8 8 9 9 10 10 12 12 10 10 10
DISPERSION IDX..4 4 8 21 34 50 57 68 79 78 72 69
LVORI...........5 5 4 3 2 1 1 1 1 1 1 1
FORECASTER...SHASHY
REQUESTED BY...S DALU
TYPE OF REQUEST...PRESCRIBED
.TAG 2617023.0/JAX
.DELDT 07/09/26
.FORMATTERVERSION 2.0.0
.EMAIL SEAN.DOWIE@FDACS.GOV
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