Spot Forecast
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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288 FNCA72 TJSJ 261357 FWSSJU Spot Forecast for NWS/TEST...WFO SJU National Weather Service San Juan PR 957 AM AST Thu Sep 26 2024 ....THIS IS A TEST....THIS IS A TEST... Forecast is based on forecast start time of 1000 AST on September 26. If conditions become unrepresentative...contact the National Weather Service. Please contact our office if you have questions or concerns with this forecast at PHONE: 787-253-4586. ...HEAT ADVISORY IN EFFECT UNTIL 8 PM GMT THIS EVENING... .DISCUSSION... .TODAY... Sky/weather.........Mostly sunny (45-55 percent). Scattered showers early in the morning, then isolated showers late in the morning. Scattered showers in the afternoon. Chance of pcpn......40 percent. LAL.................1. Max temperature.....Around 89. Min humidity........69 percent. Heat index..........MISSING. Surface winds (mph).East winds around 5 mph increasing to 6 to 14 mph early in the morning. Wind (20 ft)........East winds 5 to 13 mph. Mixing height.......4900 ft AGL. Transport winds.....East 6 to 15 mph increasing to 16 to 18 mph late in the afternoon. Smoke dispersal.....Poor (3000 knot-ft) early in the morning increasing to excellent (66000 knot-ft) in the afternoon. Dispersion..........6. Wave height.........Less than 1 foot. Wave period.........0 SECONDS. TIME (AST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........40 40 50 50 50 50 50 50 Weather cov.....ISO ISO SCT SCT SCT SCT SCT SCT Weather type....RW RW RW RW RW RW RW RW Tstm cov........ Chc of pcpn (%).20 20 30 30 30 30 30 30 LAL.............1 1 1 1 1 1 1 1 Temp............87 88 89 89 89 88 87 84 RH..............72 70 68 68 68 70 70 80 Heat index (F)..M M M M M M M M 20 FT wind dir..E E E E E E E E 20 FT wind spd..9 12 13 14 14 14 14 14 20 FT wind gust.10 15 17 17 17 18 18 17 Surface wnd dir.E E E E E E E E Surface wnd spd.9 12 13 14 14 14 14 14 Surface wnd gst.10 15 17 17 17 18 18 17 Mix hgt (kft)...4.1 4.8 4.9 4.8 4.5 4.3 4.0 3.4 Transp wind dir.E E E E E E E E Transp wind spd.12 14 15 15 16 17 18 18 Dispersion......6 6 6 6 6 6 6 6 Vrate kt-ft/1K..43 57 64 65 63 66 65 55 Ventrate Cat....FR FR GD GD GD GD GD FR Wave period (s).0 0 0 0 0 0 0 0 Wave height (ft)0 0 0 0 0 0 0 0 .TONIGHT... Sky/weather.........Partly cloudy (25-35 percent) then becoming mostly cloudy (70-80 percent). Isolated showers early in the evening, then scattered showers late in the evening. Numerous showers and isolated thunderstorms overnight. Chance of pcpn......60 percent. LAL.................1 until 2400, then 2. Min temperature.....Around 78. Max humidity........93 percent. Heat index..........MISSING. Surface winds (mph).East winds 5 to 12 mph decreasing to around 5 mph overnight. Wind (20 ft)........East winds 5 to 8 mph in the evening becoming light. Gusty and erratic winds expected near thunderstorms overnight. Mixing height.......0 ft AGL. Transport winds.....East 6 to 15 mph decreasing to around 5 mph overnight. Smoke dispersal.....Good (31800 knot-ft) early in the evening decreasing to poor (0 knot-ft) late in the night. Dispersion..........4. Wave height.........Less than 1 foot. Wave period.........0 SECONDS. TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........30 30 30 70 70 70 80 80 80 80 80 80 Weather cov.....ISO ISO ISO SCT SCT SCT NUM NUM NUM NUM NUM NUM Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ ISO ISO ISO ISO ISO ISO Chc of pcpn (%).20 20 20 50 50 50 60 60 60 60 60 60 LAL.............1 1 1 1 1 1 2 2 2 2 2 2 Temp............83 82 81 81 80 80 79 79 79 78 78 78 RH..............83 85 87 88 89 91 92 92 93 93 93 92 Heat index (F)..M M M M M M M M M M M M 20 FT wind dir..E E E E E E E E E E E E 20 FT wind spd..12 9 8 7 6 6 5 5 5 3 3 3 20 FT wind gust.15 10 9 8 7 7 6 6 6 5 5 5 Surface wnd dir.E E E E E E E E E E E E Surface wnd spd.12 9 8 7 6 6 5 5 5 3 3 3 Surface wnd gst.15 10 9 8 7 7 6 6 6 5 5 5 Mix hgt (kft)...2.4 1.1 0.2 0.1 0.1 0.2 0.2 0.2 0.2 0.1 0.1 0.2 Transp wind dir.E E E E E E E E E E E E Transp wind spd.15 12 8 7 6 6 6 5 5 5 5 5 Dispersion......6 6 5 4 4 4 4 3 3 2 2 2 Vrate kt-ft/1K..32 11 1 0 0 1 1 1 1 1 1 1 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR Wave period (s).0 0 0 0 0 0 0 0 0 0 0 0 Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0 .FRIDAY... Sky/weather.........Mostly cloudy (70-80 percent). Numerous showers in the morning and early afternoon. Isolated thunderstorms through the day. Scattered showers late in the afternoon. Chance of pcpn......60 percent. LAL.................2. Max temperature.....Around 90. Min humidity........68 percent. Heat index..........MISSING. Surface winds (mph).East winds around 5 mph increasing to 5 to 10 mph. Wind (20 ft)........Light winds becoming east 5 to 8 mph. Gusty and erratic winds expected near thunderstorms. Mixing height.......1200 ft AGL. Transport winds.....East 6 to 10 mph. Smoke dispersal.....Poor (1800 knot-ft). Dispersion..........6. Wave height.........Less than 1 foot. Wave period.........0 SECONDS. TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........80 80 80 80 80 80 80 80 80 70 70 70 Weather cov.....NUM NUM NUM NUM NUM NUM NUM NUM NUM SCT SCT SCT Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO Chc of pcpn (%).60 60 60 60 60 60 60 60 60 50 50 50 LAL.............2 2 2 2 2 2 2 2 2 2 2 2 Temp............81 83 85 87 88 89 90 90 90 89 88 85 RH..............86 81 77 74 72 70 68 68 68 69 72 78 Heat index (F)..M M M M M M M M M M M M 20 FT wind dir..E E E E E E E E E E E E 20 FT wind spd..5 5 6 6 7 8 9 9 10 9 7 6 20 FT wind gust.6 6 7 7 8 9 10 10 12 10 8 7 Surface wnd dir.E E E E E E E E E E E E Surface wnd spd.5 5 6 6 7 8 9 9 10 9 7 6 Surface wnd gst.6 6 7 7 8 9 10 10 12 10 8 7 Mix hgt (kft)...0.4 0.7 0.9 0.9 0.9 0.9 1.0 1.2 1.2 1.0 0.7 0.5 Transp wind dir.E E E E E E E E E E E E Transp wind spd.6 6 7 7 8 8 9 10 10 9 8 7 Dispersion......5 5 6 6 6 6 6 6 6 6 6 6 Vrate kt-ft/1K..2 4 5 6 6 6 8 10 11 9 5 3 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR Wave period (s).0 0 0 0 0 0 0 0 0 0 0 0 Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0 $$ Forecaster...O. Martinez Requested by...Odalys Martinez Type of request...OTHER .TAG 2423081.0/SJU .DELDT 09/26/24 .FormatterVersion 2.0.0 .EMAIL odalys.martinez@noaa.gov