FNCA72 TJSJ 210608 FWSSJU Spot Forecast for 301 Rd....PRFD National Weather Service San Juan PR 208 AM AST Sun Jun 21 2026 Forecast is based on forecast start time of 0800 AST on June 21. 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... A tropical wave will increase the chance of showers and isolated thunderstorms across the region today. However, the southwest quadrant of PR is where we expect a lower chance of it, but we cannot rule out activity across the region. Winds will prevail mainly from the east to east-southeast at 10 to 20 mph, with gusts up to 33 mph, especially from mid morning into the afternoon. The tropical wave will maintain RH values above critical levels. .REST OF TODAY... Sky/weather.........Sunny (20-30 percent) then becoming mostly sunny (40-50 percent). Haze early in the morning. Haze late in the afternoon. Scattered showers and isolated thunderstorms early in the afternoon. Chance of pcpn......40 percent. Max temperature.....Around 92. Min humidity........54 percent. Wind (20 ft)........Southeast winds 9 to 18 mph with gusts to around 31 mph increasing to around 20 mph with gusts to around 33 mph late in the afternoon. Gusty and erratic winds expected near thunderstorms early in the afternoon. Mixing height.......3100 ft AGL. Transport winds.....East 12 to 18 mph increasing to 22 to 26 mph late in the morning. Smoke dispersal.....Poor (9900 knot-ft) early in the morning increasing to good (59900 knot-ft) in the afternoon. Dispersion..........6. Eye level winds.....Southeast winds 5 to 11 mph with gusts to around 19 mph increasing to east around 12 mph with gusts to around 20 mph late in the afternoon. TIME (AST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........20 30 30 30 60 60 60 30 30 30 Weather cov.....DEF DEF DEF DEF SCT SCT SCT DEF DEF DEF Weather type....HAZ HAZ HAZ HAZ RW RW RW HAZ HAZ HAZ Tstm cov........ ISO ISO ISO Chc of pcpn (%).0 10 10 10 40 40 40 10 10 10 Temp............86 88 89 90 91 92 92 91 90 88 RH..............64 61 59 57 56 54 54 55 57 61 20 FT wind dir..E E SE SE SE SE SE SE E E 20 FT wind spd..9 13 15 17 18 18 18 20 20 20 20 FT wind gust.10 21 25 29 30 31 31 32 32 33 Eye lvl wnd dir.E E SE SE SE SE SE SE E E Eye lvl wnd spd.5 8 9 10 11 11 11 12 12 12 Eye lvl wnd gst.6 13 15 17 18 19 19 19 19 20 Mix hgt (kft)...1.0 1.7 2.5 3.1 3.0 2.7 2.4 2.5 2.6 2.6 Transp wind dir.E E E E E E E E E E Transp wind spd.12 15 18 22 23 23 23 24 25 26 Dispersion......6 6 6 6 6 6 6 6 6 6 Vrate kt-ft/1K..10 23 42 58 60 54 48 52 57 59 Ventrate Cat....PR PR FR FR FR FR FR FR FR FR .TONIGHT... Sky/weather.........Mostly clear (10-20 percent). Haze. Chance of pcpn......0 percent. Min temperature.....Around 76. Max humidity........86 percent. Wind (20 ft)........East winds 14 to 21 mph. Gusts up to 33 mph in the evening. Mixing height.......600 ft AGL. Transport winds.....East 17 to 26 mph decreasing to 16 to 20 mph overnight. Smoke dispersal.....Good (49300 knot-ft) early in the evening decreasing to poor (9500 knot-ft) late in the night. Dispersion..........6. Eye level winds.....East winds 8 to 13 mph. Gusts up to 33 mph in the evening. TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........20 20 20 20 20 20 5 5 5 5 5 5 Weather cov.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF Weather type....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............85 83 82 80 80 79 78 77 76 76 76 79 RH..............69 74 78 80 82 83 84 85 86 86 85 78 20 FT wind dir..E E E E E E E E E E E E 20 FT wind spd..21 21 20 18 16 14 14 14 14 14 15 15 20 FT wind gust.33 33 33 30 26 24 23 23 24 24 24 25 Eye lvl wnd dir.E E E E E E E E E E E E Eye lvl wnd spd.13 13 12 11 10 8 8 8 8 8 9 9 Eye lvl wnd gst.20 20 20 18 16 14 14 14 14 14 14 15 Mix hgt (kft)...2.1 1.5 1.0 0.9 0.9 0.9 0.8 0.7 0.7 0.6 0.7 0.9 Transp wind dir.E E E E E E E E E E E E Transp wind spd.26 26 25 23 20 17 16 16 17 17 18 20 Dispersion......6 6 6 6 6 6 6 6 6 6 6 6 Vrate kt-ft/1K..49 35 23 18 15 13 11 10 10 10 11 16 Ventrate Cat....FR PR PR PR PR PR PR PR PR PR PR PR .MONDAY... Sky/weather.........Sunny (20-30 percent). Haze through the day. Isolated showers in the afternoon. Chance of pcpn......20 percent. Max temperature.....Around 93. Min humidity........50 percent. Wind (20 ft)........East winds 15 to 22 mph. Gusts up to 35 mph increasing to 36 mph late in the morning. Mixing height.......3700 ft AGL. Transport winds.....East 22 to 29 mph. Smoke dispersal.....Fair (27400 knot-ft) early in the morning increasing to excellent (91800 knot-ft) in the afternoon. Dispersion..........6. Eye level winds.....East winds 9 to 13 mph. Gusts up to 35 mph increasing to 36 mph late in the morning. TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........26 26 26 5 5 5 40 40 40 40 40 40 Weather cov.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF Weather type....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ Tstm cov........ Chc of pcpn (%).10 10 10 0 0 0 20 20 20 20 20 20 Temp............81 84 86 88 90 91 92 93 93 92 91 89 RH..............72 67 63 58 55 52 50 50 50 52 55 60 20 FT wind dir..E E E E SE SE SE SE SE SE E E 20 FT wind spd..15 16 17 20 21 22 22 21 21 20 18 18 20 FT wind gust.26 28 30 32 35 36 36 36 35 32 31 30 Eye lvl wnd dir.E E E E SE SE SE SE SE SE E E Eye lvl wnd spd.9 10 10 12 13 13 13 13 13 12 11 11 Eye lvl wnd gst.16 17 18 19 21 22 22 22 21 19 19 18 Mix hgt (kft)...1.5 2.2 2.8 3.2 3.5 3.7 3.7 3.5 3.2 2.9 2.5 2.1 Transp wind dir.E E E E E E E E E E E E Transp wind spd.22 23 25 26 29 29 28 26 25 24 24 23 Dispersion......6 6 6 6 6 6 6 6 6 6 6 6 Vrate kt-ft/1K..27 44 62 76 87 92 89 81 70 62 52 42 Ventrate Cat....PR FR GD GD GD GD GD GD GD GD FR FR $$ Forecaster...C. Anselmi Requested by...Jose M. Martinez Type of request...WILDFIRE .TAG 2615693.4/SJU .DELDT 06/21/26 .FormatterVersion 2.0.0 .EMAIL josemartin@dsp.pr.gov