965
FNUS72 KJAX 190421
FWSJAX
SPOT FORECAST FOR SUNNYHILL SOUTH-EAST MARSH...SJRWMD
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1221 AM EDT TUE AUG 19 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON AUGUST 19.
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.
DISCUSSION
TRANSPORT WINDS AND THEREFORE DISPERSIONS INCREASE TODAY AND
THROUGH WEDNESDAY AS HURRICANE ERIN APPROACHES THE REGION, THOUGH
EXPECTED TO PASS SEVERAL HUNDRED MILES TO THE EAST THROUGH LATE
WEEK. INCREASINGLY BREEZY AND DRIER FLOW NEAR THE SURFACE AND
ALOFT IS EXPECTED COMPARED TO NORMAL, TAPERING RAIN CHANCES NEAR
THE SITE FOR THE NEXT SEVERAL DAYS. WIND DIRECTION IS EXPECTED TO
REMAIN PERSISTENT, WITH NO SEA BREEZE RELATED SHIFT EXPECTED AT
THE SITE DAILY THROUGH WEDNESDAY.
REST OF TODAY
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........14 11 20 35 41 36 45 46 47 31
WEATHER COV..... SCH CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ ISO CHC CHC CHC ISO
CHC OF PCPN (%).0 0 0 10 20 30 40 40 40 30
CHC OF THDR (%).10 0 0 10 20 30 40 40 40 30
TEMP............78 83 86 89 92 93 93 93 92 92
RH..............94 85 75 66 60 56 56 56 56 56
HEAT INDEX (F)..78 90 98 102 102 103 102 103 101 101
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE
20 FT WIND SPD..3 6 7 8 8 9 9 10 10 10
20 FT WIND GUST.6 9 10 13 13 14 14 16 16 16
MIX HGT (KFT)...0.5 1.6 2.9 3.4 4.1 4.6 4.7 4.2 4.2 4.3
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.7 9 10 12 12 12 12 13 14 14
DISPERSION IDX..7 18 37 48 56 62 63 62 67 71
LVORI...........6 4 3 1 1 1 1 1 1 1
TONIGHT
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........36 26 29 20 6 7 3 4 3 7 5 2
WEATHER COV.....SCH SCH
WEATHER TYPE....RW RW
TSTM COV........ISO ISO
CHC OF PCPN (%).20 20 10 10 10 0 0 0 0 0 0 0
CHC OF THDR (%).20 20 10 10 10 0 0 0 0 0 0 0
TEMP............90 88 85 82 80 80 79 78 77 77 76 75
RH..............60 63 67 77 82 82 88 91 94 90 94 97
HEAT INDEX (F)..99 96 91 87 85 79 78 78 77 76 76 76
20 FT WIND DIR..NE NE NE NE N N N N N N N N
20 FT WIND SPD..10 9 7 6 6 5 5 5 5 5 5 6
20 FT WIND GUST.16 14 10 9 9 7 7 7 7 7 7 9
MIX HGT (KFT)...3.7 2.2 1.0 0.8 0.6 0.5 0.5 0.4 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NE NE NE NE NE N N N N N N N
TRANSP WIND SPD.14 14 13 12 10 9 8 8 8 9 10 12
DISPERSION IDX..63 39 6 5 5 4 4 4 4 4 5 5
LVORI...........1 1 3 4 4 5 6 6 6 6 6 7
WEDNESDAY
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 5 4 4 10 15 20 24 29 29 29 29
WEATHER COV..... SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC
CHC OF PCPN (%).0 0 20 20 20 20 20 20 40 40 40 40
CHC OF THDR (%).0 0 10 10 10 20 20 20 30 40 40 40
TEMP............75 75 77 82 86 88 90 91 92 92 91 90
RH..............97 97 94 82 72 68 62 58 56 54 56 58
HEAT INDEX (F)..76 76 77 86 94 102 105 106 105 105 103 102
20 FT WIND DIR..N N N N N N N N N N N N
20 FT WIND SPD..6 6 6 7 7 8 8 7 8 7 7 7
20 FT WIND GUST.9 9 9 10 10 12 12 10 12 10 10 10
MIX HGT (KFT)...0.6 0.7 0.8 1.7 2.6 3.5 4.0 4.5 5.0 4.7 4.5 4.2
TRANSP WIND DIR.N N N N N N N N N N N N
TRANSP WIND SPD.12 13 13 14 14 14 13 12 10 9 9 8
DISPERSION IDX..5 6 14 30 45 58 60 61 60 55 49 43
LVORI...........7 8 5 3 3 2 1 1 1 1 1 1
FORECASTER...DUBOIS
REQUESTED BY...BRENT KEITH
TYPE OF REQUEST...PRESCRIBED
.TAG 2520133.0/JAX
.DELDT 08/19/25
.FORMATTERVERSION 2.0.0
.EMAIL BKEITH@SJRWMD.COM
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