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 5649 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