FNCA72 TJSJ 161345 FWSSJU Spot Forecast for Alpha Sqd...PRFD National Weather Service San Juan PR 945 AM AST Fri Oct 16 2026 Forecast is based on ignition time of 1000 AST on October 16. 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. .DISCUSSION... Nearby stations report fair weather, with temperatures in the mid to upper 80s and heat index values in the mid to upper 90s. East winds are around 5 mph with occasional higher gusts, and is expected to peak between 8 and 16 mph this afternoon. Fair weather is expected today, with little to no rainfall. Heat will be the primary concern, with heat index values reaching 100–107°F during peak afternoon heating. .REST OF TODAY... Sky/weather.........Sunny (0-10 percent). Chance of pcpn......0 percent. Max temperature.....Around 90. Min humidity........54 percent. Wind (20 ft)........East winds 10 to 16 mph. Gusts up to 28 mph in the late morning and afternoon. Mixing height.......5300 ft AGL. Transport winds.....East 13 to 15 mph. Dispersion..........6. TIME (AST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........5 5 5 5 5 9 9 9 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 Temp............88 89 90 90 90 89 85 83 RH..............58 56 55 54 55 57 64 70 20 FT wind dir..E E E SE SE SE E E 20 FT wind spd..13 15 16 16 16 15 13 10 20 FT wind gust.21 25 28 28 26 24 22 12 Mix hgt (kft)...4.1 4.9 5.2 5.3 5.0 4.4 3.7 2.8 Transp wind dir.E E E E E E E E Transp wind spd.13 15 15 15 14 14 14 13 Dispersion......6 6 6 6 6 6 6 6 .TONIGHT... Sky/weather.........Mostly clear (10-20 percent). Chance of pcpn......10 percent. Min temperature.....Around 75. Max humidity........88 percent. Dispersion..........5. TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........5 5 5 18 18 18 27 27 27 5 5 5 Weather cov..... ISO ISO ISO Weather type.... RW RW RW Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 10 10 10 0 0 0 Temp............81 80 79 79 78 78 77 77 76 76 75 75 RH..............73 75 77 79 81 82 83 84 85 86 87 88 Dispersion......6 6 3 3 3 3 3 3 3 3 3 3 .SATURDAY... Sky/weather.........Mostly sunny (30-40 percent). Isolated showers. Chance of pcpn......20 percent. Max temperature.....Around 91. Min humidity........51 percent. Dispersion..........5. TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........26 26 26 40 40 40 40 40 40 30 30 30 Weather cov.....ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ Chc of pcpn (%).10 10 10 20 20 20 20 20 20 20 20 20 Temp............77 81 83 86 87 89 90 90 90 89 86 83 RH..............80 71 64 58 54 51 51 52 54 56 62 67 Dispersion......3 3 6 6 6 6 6 6 6 6 6 6 $$ Forecaster...C. Anselmi Requested by...Jose M. Martinez Type of request...PRESCRIBED .TAG 2623882.0/SJU .DELDT 10/16/26 .FormatterVersion 2.0.0 .EMAIL josemartin@dsp.pr.gov