Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
408 FOCA52 TJSJ 200903 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 503 AM AST Wed Aug 20 2025 PRZ001-202000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 93 80 90 80 87 Temp 88 92 93 89 84 82 81 81 86 89 90 87 83 82 81 81 84 87 87 85 82 Dewpt 77 77 78 77 76 75 75 74 75 75 76 76 75 75 75 75 76 77 76 76 76 RH 70 62 62 68 77 79 82 79 70 64 64 70 77 79 82 82 77 72 70 75 82 Wind dir SE E E E E E E E E E E E E E E E E E E E NE Wind spd 6 13 17 13 9 10 11 10 11 12 13 12 9 9 9 8 9 11 11 9 6 Clouds SC SC B1 SC FW SC SC CL SC SC SC SC CL CL CL CL B2 B2 B1 B1 B1 PoP 12hr 40 5 10 50 50 QPF 12hr 0.12 0.02 0.02 0.04 0.39 Rain shwrs S S C C S S S S S S C C C C C Tstms S S S S Obvis H H H H H H Heat index 100106109102 93 89 86 86 95100102 97 91 88 86 86 93 98 98 94 89 Max heat 100 109 108 92 95 102 101 90 93 98 97 Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 79 86 79 92 79 90 79 88 Temp 79 83 86 81 79 87 92 83 80 86 90 83 80 85 88 82 Dewpt 75 76 76 76 76 77 77 77 76 76 76 76 76 75 76 76 PWind dir E SE SE E E E E E Wind char LT GN LT GN GN GN GN GN Avg clouds B1 B1 B2 B1 B1 B1 B1 B1 SC B1 SC SC SC B1 B1 SC PoP 12hr 60 70 50 50 40 40 40 40 Rain shwrs C L L L C C C C C C C C C C C C Tstms S S S S S $$ PRZ002-202000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 81 89 81 89 Temp 87 89 90 87 84 83 82 82 86 89 89 87 84 83 81 82 86 89 89 85 80 Dewpt 78 78 78 77 77 76 76 76 76 76 76 76 76 76 76 76 77 77 77 77 77 RH 75 70 68 72 80 80 82 82 72 66 66 70 77 80 85 82 75 68 68 77 91 Wind dir SE SE E E E E E E E E E E NE NE NE NE E E E NE NE Wind spd 12 13 14 12 11 11 12 12 11 10 11 10 9 11 11 10 10 12 10 9 5 Clouds SC B1 SC SC SC SC SC SC SC SC SC SC CL CL CL CL B2 B2 B2 B2 B2 PoP 12hr 40 20 30 50 60 QPF 12hr 0.11 0.03 0.05 0.04 0.53 Rain shwrs S C C S S S S S S S C C L L L L C Tstms S S S S Obvis H H H H H H Heat index 99104105 99 94 91 88 89 96100100 97 92 90 88 89 97101102 95 87 Max heat 99 106 105 93 96 101 100 91 97 102 101 Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 87 76 90 80 89 80 89 Temp 77 83 87 80 77 85 90 83 81 86 89 83 81 86 89 82 Dewpt 77 77 77 77 77 78 78 77 77 77 77 77 76 77 77 76 PWind dir E S SE E E E E E Wind char LT LT GN GN GN GN GN GN Avg clouds B2 B2 B2 B1 B2 B2 B1 B1 SC SC SC SC SC B1 B1 SC PoP 12hr 70 70 60 50 40 40 40 40 Rain shwrs C L L L L L C C S C C C C C C C Tstms S S S S S S $$ PRZ007-202000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 78 90 76 88 Temp 86 89 90 86 82 80 79 79 85 89 90 86 81 79 77 77 83 87 88 85 81 Dewpt 78 79 80 79 77 75 73 72 75 76 78 77 76 74 73 72 75 78 79 79 77 RH 77 73 73 80 85 85 82 79 72 66 68 75 85 85 87 85 77 75 75 82 88 Wind dir E SE SE SE E NE NE NE E E SE SE E NE NE NE NE E SE E NE Wind spd 10 12 10 11 9 5 5 5 4 12 12 10 8 6 6 5 4 11 8 3 4 Clouds SC SC SC CL CL CL CL CL CL CL FW FW SC SC CL CL SC SC FW FW B2 PoP 12hr 20 0 20 20 50 QPF 12hr 0.04 0 0.02 0.04 0.11 Rain shwrs S S S S S S S C Obvis H H H H H H H H Heat index 98105108100 90 85 82 94101105 97 87 91100103 97 88 Max heat 98 108 107 89 94 105 104 84 91 103 102 Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 77 84 78 90 77 89 77 89 Temp 78 81 84 80 78 85 90 81 78 84 89 81 78 84 89 81 Dewpt 74 76 79 77 75 78 80 77 74 76 78 76 73 76 78 76 PWind dir NE SE E E E E NE E Wind char LT LT LT GN LT GN LT GN Avg clouds B2 B1 B1 SC SC B1 B1 SC SC SC FW SC SC SC FW SC PoP 12hr 50 40 40 40 20 30 20 10 Rain shwrs C C C C C C C S S S C C S S S S $$ PRZ008-202000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 78 89 78 88 Temp 85 89 90 86 82 80 79 79 85 88 89 86 82 80 79 79 84 87 88 85 81 Dewpt 75 77 78 78 78 76 75 74 75 75 76 76 76 75 75 74 75 77 76 75 76 RH 72 68 68 77 88 88 88 85 72 66 66 72 82 85 88 85 74 72 68 72 85 Wind dir E NE NE NE E E E E E E NE NE E E E E E NE NE NE NE Wind spd 5 4 10 10 8 9 13 11 10 11 17 17 17 14 13 11 11 14 17 16 16 Clouds CL CL B2 B2 SC CL CL CL CL CL CL CL SC SC SC SC FW FW SC SC SC PoP 12hr 50 10 10 20 10 QPF 12hr 0.30 0.01 0.01 0.07 0.06 Rain shwrs C C S S S S S S S S Tstms S Heat index 94102105 99 91 86 83 93 98100 95 89 85 92 99 99 93 88 Max heat 94 105 104 89 93 100 100 87 92 100 98 Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 78 86 77 89 77 88 78 88 Temp 79 83 86 80 78 84 89 81 78 84 88 81 79 84 88 81 Dewpt 76 76 76 75 76 76 77 77 75 76 77 76 76 76 77 76 PWind dir E SE E E E E E E Wind char GN GN LT LT GN GN GN BZ Avg clouds SC SC B2 B2 SC SC B1 SC SC SC FW SC CL FW SC B1 PoP 12hr 40 70 50 50 30 30 5 50 Rain shwrs S C L L S C C C C C C C C C Tstms S S S S S S $$ PRZ010-202000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 95 75 93 76 93 Temp 88 94 95 89 82 79 76 77 86 92 93 88 82 79 77 78 87 92 93 88 82 Dewpt 77 79 78 79 79 77 74 73 75 76 77 77 77 76 75 74 76 77 79 77 77 RH 70 62 58 73 91 94 94 87 70 60 60 70 85 91 94 88 70 62 64 70 85 Wind dir E SE SE SE SE E E E E E SW N NE E E E E NE NE NE NE Wind spd 6 9 9 1 6 5 6 4 3 3 4 3 10 6 10 8 9 4 9 9 12 Clouds SC CL SC SC SC CL CL CL CL CL CL CL B1 B1 SC SC FW FW CL CL SC PoP 12hr 30 10 40 40 30 QPF 12hr 0.10 0 0.03 0.09 0.06 Rain shwrs S C C S C C S S C Obvis H H H H H H Heat index 100112112104 91 95104107100 89 84 97106110100 89 Max heat 100 113 112 88 95 107 106 88 97 110 109 Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 86 76 93 75 92 75 93 Temp 77 82 86 79 77 87 93 81 76 86 92 81 76 86 93 81 Dewpt 75 76 79 76 76 77 79 77 75 76 78 77 75 76 78 77 PWind dir E SE E E E E E E Wind char GN GN LT GN LT LT LT LT Avg clouds SC B1 B1 B1 SC SC SC SC SC SC FW SC CL CL SC SC PoP 12hr 40 60 30 30 20 40 0 40 Rain shwrs C C L L S C C C S S C C C C Tstms S S $$ VIZ001-202000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 81 92 81 91 Temp 88 91 92 89 85 83 82 82 88 91 92 89 85 83 82 82 87 90 91 87 83 Dewpt 79 79 78 77 77 76 76 76 76 76 76 76 77 77 77 77 77 77 76 77 77 RH 75 68 64 68 77 80 82 82 68 62 60 66 77 82 85 85 72 66 62 72 82 Wind dir E E E E E E E E E E E E NE NE NE NE E E NE NE NE Wind spd 17 18 17 17 16 18 18 20 12 14 16 13 17 19 18 17 17 16 12 11 9 Clouds SC SC SC SC CL CL SC SC SC SC SC SC FW FW FW FW B2 B2 B2 B2 B1 PoP 12hr 20 20 30 50 60 QPF 12hr 0.03 0.02 0.05 0.05 0.52 Rain shwrs S S S S S S S S C C L L L L C Tstms S S S S Obvis H H H H H H H H Heat index 103108107101 95 91 89 90 99104105100 95 92 89 90 99104103 99 92 Max heat 103 108 108 94 99 105 104 94 99 104 102 Heat Y Y Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 79 87 81 92 82 92 81 92 Temp 80 84 87 83 81 88 92 85 83 88 92 85 82 88 92 85 Dewpt 77 76 76 77 78 78 77 78 78 77 77 77 77 77 77 77 PWind dir E S SE E E E E E Wind char LT GN BZ BZ BZ BZ BZ BZ Avg clouds B1 B2 B2 B2 B2 B2 B1 SC SC SC SC SC SC B1 B1 B1 PoP 12hr 70 70 60 50 30 30 40 40 Rain shwrs C L L L L L C C C C C C C C C C Tstms S S S S S S $$ VIZ002-202000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 503 AM AST Wed Aug 20 2025 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 79 90 78 89 Temp 86 89 90 87 83 81 80 80 86 89 90 86 82 80 79 79 85 88 89 85 80 Dewpt 79 78 77 77 76 75 75 75 76 75 76 76 75 76 76 76 76 77 76 77 77 RH 80 70 66 72 80 82 85 85 72 64 64 72 79 88 91 91 75 70 66 77 91 Wind dir E E E E E E E E E E E E NE NE NE NE E E NE NE NE Wind spd 16 18 17 16 14 17 16 17 14 16 13 14 13 14 16 14 14 14 12 12 9 Clouds SC SC CL SC FW SC SC SC SC SC SC SC CL CL CL CL B2 B2 SC SC B2 PoP 12hr 20 10 30 50 50 QPF 12hr 0.03 0.02 0.04 0.04 0.22 Rain shwrs S S S S S S S S C C L L S S C Tstms S S Obvis H H H H H H H H Heat index 99104103 98 90 87 84 85 96100102 96 89 86 83 94101100 95 87 Max heat 99 105 104 89 96 102 101 87 94 101 100 Heat Y Y Date Sat 08/23/25 Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 88 79 90 79 90 79 90 Temp 77 83 88 82 80 86 90 83 80 86 90 83 80 86 90 83 Dewpt 76 76 77 77 77 78 77 77 77 77 77 77 76 77 77 76 PWind dir SE SE E E E E E E Wind char GN GN GN BZ GN BZ BZ GN Avg clouds B2 B2 OV B2 B2 B2 B1 SC SC SC SC SC SC SC B1 SC PoP 12hr 70 70 60 50 20 20 40 40 Rain shwrs C L L L L L C S S S S S S C C C Tstms S S S S S S $$