219
FNUS72 KJAX 291719
FWSJAX
SPOT FORECAST FOR OLD BOSTWICK (54)...FFS
NATIONAL WEATHER SERVICE JACKSONVILLE FL
119 PM EDT MON JUN 29 2026
FORECAST IS BASED ON FORECAST START TIME OF 1400 EDT ON JUNE 29.
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 UNTIL 7 PM EDT THIS EVENING
DISCUSSION
HOT CONDITIONS WILL CONTINUE THROUGH THIS EVENING WITH HEAT INDEX
APPROACHING HEAT ADVISORY CRITERIA THROUGH THIS AFTERNOON AND EARLY
EVENING. CHANCES FOR SHOWERS AND THUNDERSTORMS WILL BEGIN AROUND
3 PM, AND PEAK FROM ABOUT 4 PM TO 8 PM TODAY. ISOLATED STRONG STORMS
WILL BE POSSIBLE, WITH GUSTS UP TO 40 TO 50 MPH. DISPERSIONS WILL BE
IN THE FAIR TO GOOD RANGE AS MIXING HEIGHTS WILL REACH OVER 6KFT
OUTSIDE OF ANY SHOWERS OR STORMS. THIS MIXING WILL BRING RH DOWN TO
AROUND 45% LATER THIS AFTERNOON AND EARLY EVENING.
TUESDAY, WINDS WILL SHIFT MORE TOWARDS THE NORTH TO NORTHEAST AS A
"BACKDOOR" FRONT BRUSHES THE REGION. OVERALL NOT AS HOT AS TODAY, WITH
CHANCES FOR SHOWERS AND T'STORMS EARLIER IN THE DAY. BREEZIER FLOW WILL
KEEP DISPERSIONS IN A SIMILAR RANGE TO TODAY DESPITE MORE MARITIME
INFLUENCE AND LOWER MIXING HEIGHTS.
REST OF TODAY
TIME (EDT) 2PM 3PM 4PM 5PM
SKY (%).........42 50 51 57
WEATHER COV..... SCH CHC CHC
WEATHER TYPE.... RW RW RW
TSTM COV........ SCH CHC CHC
CHC OF PCPN (%).10 20 30 30
CHC OF THDR (%).20 20 20 30
TEMP............96 96 97 95
RH..............48 46 45 48
HEAT INDEX (F)..106 106 107 104
20 FT WIND DIR..NW NW N N
20 FT WIND SPD..5 5 5 3
20 FT WIND GUST.10 10 9 9
MIX HGT (KFT)...6.7 6.6 6.0 5.1
TRANSP WIND DIR.W NW NW NW
TRANSP WIND SPD.6 7 7 7
DISPERSION IDX..50 50 48 42
LVORI...........1 1 1 1
TONIGHT
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........58 59 60 55 51 46 51 36 35 40 31 38
WEATHER COV.....CHC CHC CHC CHC SCH SCH
WEATHER TYPE....RW RW RW RW RW RW
TSTM COV........CHC CHC CHC CHC SCH SCH
CHC OF PCPN (%).40 40 40 30 20 20 10 10 0 0 0 0
CHC OF THDR (%).30 40 30 30 30 10 10 0 0 0 0 0
TEMP............93 90 85 82 80 79 79 78 78 78 77 76
RH..............52 60 75 79 85 88 88 91 91 88 90 94
HEAT INDEX (F)..102 99 94 89 85 79 79 78 78 78 77 76
20 FT WIND DIR..NE E S S S S S SW SW W N N
20 FT WIND SPD..5 5 5 3 2 1 1 1 1 1 0 0
20 FT WIND GUST.8 8 8 7 6 6 5 5 6 5 5 5
MIX HGT (KFT)...3.7 2.1 0.9 0.4 0.4 0.5 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.N NE E E S S SW SW SW W W W
TRANSP WIND SPD.7 6 6 7 7 7 7 7 7 6 6 5
DISPERSION IDX..31 18 4 3 3 3 3 3 3 3 2 2
LVORI...........2 2 3 3 4 5 5 5 6 6 6 7
TUESDAY
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........43 36 43 33 51 55 61 59 61 64 61 53
WEATHER COV..... SCH SCH CHC CHC CHC CHC CHC CHC SCH
WEATHER TYPE.... RW RW RW RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC SCH
CHC OF PCPN (%).0 0 10 20 20 30 30 30 30 30 30 20
CHC OF THDR (%).0 0 10 10 10 30 30 30 30 30 30 20
TEMP............76 76 79 83 87 90 92 92 91 93 91 90
RH..............90 94 88 80 70 64 60 60 62 56 60 62
HEAT INDEX (F)..76 76 79 91 98 102 105 105 103 105 102 101
20 FT WIND DIR..NW NW N N N N NE NE NE NE NE NE
20 FT WIND SPD..1 1 2 3 5 6 7 8 10 9 10 12
20 FT WIND GUST.5 5 6 6 8 10 12 14 15 15 15 16
MIX HGT (KFT)...0.4 0.5 0.8 1.7 2.7 3.6 4.0 4.2 4.3 4.6 4.8 4.6
TRANSP WIND DIR.W NW NW N N NE NE NE NE NE NE NE
TRANSP WIND SPD.5 5 6 7 8 8 9 9 10 10 12 12
DISPERSION IDX..2 2 6 14 26 38 43 46 38 42 45 51
LVORI...........7 7 5 4 3 2 1 1 1 1 1 1
FORECASTER...DUBOIS
REQUESTED BY...ACITO
TYPE OF REQUEST...WILDFIRE
.TAG 2616442.0/JAX
.DELDT 06/29/26
.FORMATTERVERSION 2.0.0
.EMAIL KYLE.ACITO@FDACS.GOV
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