Spot Forecast
Issued by NWS Jacksonville, FL
Issued by NWS Jacksonville, FL
728 FNUS72 KJAX 210535 FWSJAX Spot Forecast for GRWMA 40 38S 35S...Florida Fish and Wildlife Conservation National Weather Service Jacksonville FL 135 AM EDT Tue Jul 21 2026 Forecast is based on ignition time of 0600 EDT on July 21. 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... Breezy south winds will develop as winds remain elevated between the Bermuda high to the east and Tropical Storm Bertha in the northern Gulf. Between 1300 and 1500 winds will shift south- southeast as the masked sea breeze moves inland beyond the Guana River WMA. A few showers my develop along the sea breeze but the best chance for thunderstorms will be during the 1600-1800 window with showers possibly lingering through 2100. With storms today expect winds to be stronger than the typical sea breeze thunderstorm. Gusts with storms will be chaotic and may even reach 40-50 mph with what looks to be a marginal storm. A drier airmass will lead to hot, dry, and breezy conditions through Wednesday afternoon. .TODAY... TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........40 40 23 11 22 8 15 8 22 38 43 51 Weather cov..... SCH SCH CHC Weather type.... RW RW RW Tstm cov........ SCH SCH CHC Chc of pcpn (%).0 0 0 0 0 0 10 10 10 20 20 30 Chc of thdr (%).0 0 0 0 0 0 10 10 10 20 20 30 Temp............78 78 79 82 86 88 90 91 91 90 89 88 RH..............85 85 88 82 72 68 66 64 64 66 68 70 Heat index (F)..78 78 79 89 96 99 103 105 105 103 102 100 Wind chill (F)..78 78 79 89 96 99 103 105 105 103 102 100 20 FT wind dir..S S S S S S S S SE SE SE SE 20 FT wind spd..13 13 14 14 14 14 15 15 16 17 18 18 20 FT wind gust.17 18 18 18 20 20 20 21 22 23 23 23 Mix hgt (kft)...0.9 1.1 1.3 1.9 2.5 3.1 2.8 2.5 2.1 2.1 2.0 1.9 Transp wind dir.S S S S S S S S SE SE SE SE Transp wind spd.16 17 17 18 18 20 20 20 21 21 21 21 Dispersion idx..14 15 29 42 53 62 60 57 53 52 51 49 LVORI...........4 4 3 3 2 2 1 2 2 2 2 2 .TONIGHT... TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........53 57 43 36 51 31 27 23 29 12 12 20 Weather cov.....CHC SCH SCH SCH SCH Weather type....RW RW RW RW RW Tstm cov........CHC SCH SCH SCH SCH Chc of pcpn (%).30 20 20 20 20 10 10 10 10 10 0 0 Chc of thdr (%).30 20 20 20 20 10 10 10 0 0 0 0 Temp............85 84 83 82 81 82 81 80 79 79 78 78 RH..............77 77 77 82 82 79 82 82 85 82 85 85 Heat index (F)..96 93 90 89 87 89 87 84 79 79 78 78 Wind chill (F)..96 93 90 89 87 89 87 84 79 79 78 78 20 FT wind dir..S S S S S S S S S S S S 20 FT wind spd..18 17 16 15 14 13 12 10 10 10 10 10 20 FT wind gust.23 21 18 17 16 16 15 15 15 15 15 15 Mix hgt (kft)...1.7 1.4 1.2 1.0 0.9 0.7 0.7 0.6 0.6 0.6 0.6 0.6 Transp wind dir.S S S S S S S S S S S S Transp wind spd.20 18 17 17 16 15 15 15 15 15 14 14 Dispersion idx..43 36 16 14 13 12 12 11 11 11 10 10 LVORI...........2 3 3 4 4 4 4 4 4 4 4 4 .WEDNESDAY... TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........31 37 24 28 37 22 24 13 14 20 26 42 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............77 77 79 82 87 90 92 93 92 92 92 90 RH..............87 87 88 82 72 66 62 60 62 62 62 64 Heat index (F)..77 77 79 89 99 103 106 107 106 106 106 102 Wind chill (F)..77 77 79 89 99 103 106 107 106 106 106 102 20 FT wind dir..S S S S S S S SE SE SE SE SE 20 FT wind spd..10 10 10 10 12 12 13 13 14 15 16 17 20 FT wind gust.14 14 14 14 15 15 16 16 17 18 20 21 Mix hgt (kft)...0.8 1.0 1.2 1.9 2.6 3.3 3.3 3.3 3.2 3.0 2.7 2.5 Transp wind dir.S S S S S S S S S S S SE Transp wind spd.13 14 14 14 14 14 14 15 15 16 17 17 Dispersion idx..10 10 21 32 42 51 51 51 48 47 48 49 LVORI...........5 5 4 3 3 2 2 2 2 2 2 2 $$ Forecaster...Boothe Requested by...Caitlyn Crawford Type of request...PRESCRIBED .TAG 2617806.0/JAX .DELDT 07/21/26 .FormatterVersion 2.0.0 .EMAIL Caitlyn.crawford@myfwc.com