241
FNUS72 KJAX 180824
FWSJAX
SPOT FORECAST FOR PENNER POND...USFS
NATIONAL WEATHER SERVICE JACKSONVILLE FL
424 AM EDT THU JUN 18 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON JUNE 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.
DISCUSSION
HOT AND UNSTABLE CONDITIONS WITH BREEZY
SOUTHWESTERLY FLOW WILL PREVAIL TODAY WITH GUSTS PUSHING ABOVE 15
MPH BY 1000. DUE TO THE ENHANCED TRANSPORT WINDS, DISPERSION WILL
BE ON THE HIGH END BY THE EARLY AFTERNOON. SOUTHWESTERLY FLOW
TENDS TO BRING AN EARLIER CHANCE IN THE SHOWERS AND IT'S POSSIBLE
FOR SHOWERS TO DEVELOP NEAR THE RX SITE BY NOON. ISOLATED
THUNDERSTORMS CANNOT BE RULED OUT BY THE HIGHER CHANCES ARE LIKELY
TO BE EAST OF THE BURN. IF T'STORMS DEVELOP, THE BEST WINDOW WILL
BE AROUND 1500-1700 AND MAY PRODUCE ERRATIC GUSTS UP TO 30 MPH.
THERE WILL BE HIGH CHANCES FOR THUNDERSTORMS AND POTENTIALLY A
FEW ROUNDS OF STORMS ON FRIDAY AS A TRAILING FRONT STALLS ACROSS
SOUTHERN GEORGIA. SOME STORMS ON FRIDAY COULD BE STRONG OR
MARGINALLY SEVERE.
REST OF TODAY
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........55 43 33 40 50 42 53 67 60 59 61
WEATHER COV..... SCH CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW
TSTM COV........ SCH CHC CHC CHC CHC
CHC OF PCPN (%).0 0 0 0 10 10 20 40 40 40 40
CHC OF THDR (%).0 0 0 0 10 10 20 40 40 40 40
TEMP............78 80 83 87 91 93 94 95 94 93 92
RH..............82 82 80 68 60 54 51 48 51 52 54
HEAT INDEX (F)..78 85 91 96 102 103 103 104 103 102 101
WIND CHILL (F)..78 85 91 96 102 103 103 104 103 102 101
20 FT WIND DIR..S S S SW SW SW SW SW SW SW SW
20 FT WIND SPD..5 5 6 7 8 9 10 10 10 10 10
20 FT WIND GUST.12 13 14 15 16 17 17 18 18 18 18
MIX HGT (KFT)...0.6 1.0 1.9 3.0 3.9 4.5 4.9 4.9 4.7 4.3 3.6
TRANSP WIND DIR.S S S SW SW SW SW SW SW SW SW
TRANSP WIND SPD.10 13 14 15 16 16 15 14 14 14 14
DISPERSION IDX..6 17 35 58 76 87 88 63 59 58 58
LVORI...........4 4 3 1 1 1 1 1 1 1 1
TONIGHT
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........53 51 56 59 46 54 66 51 60 38 36 34
WEATHER COV.....CHC SCH
WEATHER TYPE....RW RW
TSTM COV........CHC SCH
CHC OF PCPN (%).30 20 10 10 0 0 0 0 0 0 0 0
CHC OF THDR (%).30 20 10 10 0 0 0 0 0 0 0 0
TEMP............90 88 86 84 82 81 81 80 80 79 79 79
RH..............58 63 68 70 77 79 79 82 82 82 82 82
HEAT INDEX (F)..98 97 94 90 88 86 86 85 85 79 79 79
WIND CHILL (F)..98 97 94 90 88 86 86 85 85 79 79 79
20 FT WIND DIR..SW SW SW SW SW SW S S S SW SW S
20 FT WIND SPD..9 7 6 5 5 3 3 3 5 5 5 6
20 FT WIND GUST.17 16 15 13 13 12 12 12 13 14 14 15
MIX HGT (KFT)...2.7 1.8 1.0 0.7 0.6 0.6 0.5 0.5 0.5 0.5 0.4 0.4
TRANSP WIND DIR.SW SW SW SW SW SW SW SW S S S S
TRANSP WIND SPD.13 13 12 10 9 9 9 9 9 9 9 9
DISPERSION IDX..43 27 8 6 5 4 4 4 5 4 5 5
LVORI...........1 2 3 3 4 4 4 4 4 5 5 5
JUNETEENTH
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........26 43 55 34 48 53 59 55 63 68 69 82
WEATHER COV..... SCH CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW RW RW
TSTM COV........ SCH CHC CHC CHC CHC CHC CHC CHC
CHC OF PCPN (%).0 10 10 10 20 30 40 30 50 50 40 30
CHC OF THDR (%).0 10 10 10 10 30 40 30 40 40 40 20
TEMP............79 78 80 82 86 87 89 90 91 91 92 90
RH..............82 85 85 85 75 75 68 66 64 62 58 62
HEAT INDEX (F)..79 78 85 90 97 100 102 103 105 103 103 101
WIND CHILL (F)..79 78 85 90 97 100 102 103 105 103 103 101
20 FT WIND DIR..S S SW SW SW SW SW W W W W W
20 FT WIND SPD..6 7 7 8 8 9 9 9 9 9 9 9
20 FT WIND GUST.15 16 17 18 20 20 21 21 21 21 21 21
MIX HGT (KFT)...0.5 0.6 1.0 1.8 2.8 3.5 3.7 3.7 3.4 3.2 2.9 2.5
TRANSP WIND DIR.SW SW SW SW SW W W W W W W W
TRANSP WIND SPD.9 10 12 14 15 16 16 16 15 15 15 15
DISPERSION IDX..4 6 14 31 51 67 69 69 61 58 52 44
LVORI...........5 5 4 4 3 3 1 1 1 1 1 1
FORECASTER...BOOTHE
REQUESTED BY...J RAMSAY
TYPE OF REQUEST...PRESCRIBED
.TAG 2615726.0/JAX
.DELDT 06/18/26
.FORMATTERVERSION 2.0.0
.EMAIL JOHN.RAMSAY@USDA.GOV
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