FNUS72 KJAX 030855 FWSJAX Spot Forecast for St. Simons Island 4th of July #3...Glynn County Emergency Management National Weather Service Jacksonville FL 455 AM EDT Thu Jul 3 2025 Forecast is based on forecast start time of 0900 EDT on July 04. 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...Northeasterly flow north of a stationary front will send the afternoon sea breeze quickly during the early afternoon, sparking scattered showers and potentially and isolated storm. Gusts up to 20 mph are possible during the afternoon but should settle below 15 mph after sunset. Dry conditions will follow and continue through the evening with winds also favoring a northeasterly direction between 8-12 mph. .INDEPENDENCE DAY... TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........48 47 45 45 46 47 47 48 49 Weather cov.....CHC CHC CHC CHC CHC CHC Weather type....RW RW RW RW RW RW Tstm cov........ CHC CHC CHC CHC Chc of pcpn (%).40 40 40 40 40 50 0 0 0 Chc of thdr (%).10 10 30 30 30 30 0 0 0 Temp............80 84 85 85 86 86 86 86 85 RH..............94 82 77 77 75 75 75 75 77 Heat index (F)..89 93 97 98 98 98 98 97 96 Surface wnd dir.N NE NE NE NE NE NE E E Surface wnd spd.6 7 9 10 12 12 12 12 12 Surface wnd gst.9 10 12 13 15 16 17 17 17 Transp wind dir.N NE NE NE NE NE NE E E Transp wind spd.8 9 10 12 13 13 14 15 15 .FRIDAY NIGHT... TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........49 50 50 52 54 56 56 55 55 57 59 61 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............84 83 82 81 81 80 79 79 78 78 77 77 RH..............80 80 82 85 88 91 94 94 97 97 100 100 Heat index (F)..94 92 90 90 88 88 88 87 87 79 78 78 Surface wnd dir.E NE NE NE NE NE NE NE NE NE NE NE Surface wnd spd.10 10 9 9 9 9 9 9 9 9 10 10 Surface wnd gst.16 15 14 14 13 13 12 12 12 13 14 15 Transp wind dir.E NE NE NE NE NE NE NE NE NE NE NE Transp wind spd.15 14 13 12 12 12 12 13 13 14 15 16 $$ Forecaster...Boothe Requested by...Kelsiee Brazeale Type of request...OTHER .TAG 2516982.0/JAX .DELDT 07/03/25 .FormatterVersion 2.0.0 .EMAIL kelsiee.brazeale@glynncounty-ga.gov