Spot Forecast
Issued by NWS Jacksonville, FL
Issued by NWS Jacksonville, FL
557 FNUS72 KJAX 211056 FWSJAX Spot Forecast for JSF Long Branch...Florida Forest Service National Weather Service Jacksonville FL 656 AM EDT Thu Aug 21 2025 Forecast is based on ignition time of 0700 EDT on August 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... A wake trough of low pressure will slide toward north Florida today as atmospheric moisture increases, fueling higher chances for late afternoon Thunderstorms near the RX burn area. Showers may develop as early as 1400 but are more likely to begin around 1600 as a stronger (up to 10 mph) Gulf sea breeze reaches the area. Prior to the southwesterly winds, anticipate light winds (5 mph or less) that favor a WNW direction. Chaotic outflow winds will be possible with vicinity thunderstorms between 1500-1900 this evening. A weak frontal feature will increase chances for afternoon thunderstorms more on Friday. .REST OF TODAY... TIME (EDT) 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM Sky (%).........13 3 4 3 2 15 59 58 69 68 68 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).10 10 10 10 10 10 10 10 10 10 10 Chc of thdr (%).0 0 0 0 10 10 10 10 10 10 10 Temp............75 76 81 85 88 90 92 92 90 89 87 RH..............94 94 85 77 70 66 60 58 62 64 68 Wind chill (F)..75 76 81 85 88 90 92 92 90 89 87 20 FT wind dir..W W W W W W W W W W W 20 FT wind spd..2 3 5 6 6 7 8 8 8 8 8 20 FT wind gust.3 6 7 9 9 10 13 13 13 13 13 Mix hgt (kft)...0.5 0.5 1.2 1.9 3.1 4.2 4.5 4.9 4.1 3.4 2.7 Transp wind dir.W W W W W W W W W W W Transp wind spd.7 7 7 7 8 9 9 10 10 10 10 LVORI...........6 6 4 3 3 1 1 1 1 1 3 .TONIGHT... TIME (EDT) 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM Sky (%).........59 69 58 47 44 38 30 24 24 22 21 22 Weather cov.....CHC LKY LKY LKY CHC SCH Weather type....RW RW RW RW RW RW Tstm cov........LKY LKY CHC SCH SCH SCH Chc of pcpn (%).40 60 60 60 40 20 10 0 0 0 0 0 Chc of thdr (%).40 60 60 60 40 20 10 10 10 0 0 0 Temp............87 84 82 80 78 77 77 76 75 75 75 74 RH..............68 74 82 88 91 90 94 94 97 97 97 100 Wind chill (F)..87 84 82 80 78 77 77 76 75 75 75 74 20 FT wind dir..SW SW S SW SW SW W SW SW SW SW SW 20 FT wind spd..8 7 5 3 2 1 2 1 1 1 1 2 20 FT wind gust.13 10 7 6 3 2 3 2 2 2 2 3 Mix hgt (kft)...2.1 0.8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.4 0.4 Transp wind dir.W SW SW SW SW SW SW SW SW SW SW SW Transp wind spd.9 8 6 6 6 6 6 6 6 6 6 6 LVORI...........3 4 5 6 6 6 6 6 7 8 8 8 .FRIDAY... TIME (EDT) 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM Sky (%).........20 25 11 12 17 22 29 37 44 49 55 60 Weather cov..... CHC CHC CHC CHC CHC CHC DEF DEF DEF DEF Weather type.... RW RW RW RW RW RW RW RW RW RW Tstm cov........ SCH SCH SCH SCH SCH SCH DEF DEF DEF DEF Chc of pcpn (%).0 0 30 30 30 30 30 30 80 80 80 80 Chc of thdr (%).0 10 10 10 10 30 30 30 90 90 90 90 Temp............74 74 75 80 84 88 91 92 92 91 89 87 RH..............100 100 100 88 80 72 64 62 62 64 66 70 Wind chill (F)..74 74 75 80 84 88 91 92 92 91 89 87 20 FT wind dir..SW SW SW SW SW W SW SW SW SW SW SW 20 FT wind spd..1 2 2 3 3 5 5 6 6 6 6 6 20 FT wind gust.2 3 3 6 6 7 7 9 9 9 9 9 Mix hgt (kft)...0.4 0.4 0.5 1.3 2.1 2.9 3.8 4.7 5.6 4.8 3.9 3.1 Transp wind dir.SW SW SW SW SW SW SW SW SW SW W W Transp wind spd.6 6 5 5 6 6 6 7 8 9 10 10 LVORI...........9 9 9 5 4 3 3 1 1 1 1 2 $$ Forecaster...Boothe Requested by...Sam Negaran Type of request...PRESCRIBED .TAG 2520362.0/JAX .DELDT 08/21/25 .FormatterVersion 2.0.0 .EMAIL Sam.negaran@fdacs.gov