Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
570 FOCA52 TJSJ 010903 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 503 AM AST Mon Sep 1 2025 PRZ001-012000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 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 80 90 80 91 Temp 85 89 90 85 82 81 80 79 85 89 90 86 83 82 81 80 86 90 91 86 83 Dewpt 75 75 75 75 75 75 75 75 75 75 76 76 76 76 76 76 76 76 76 76 75 RH 72 64 62 72 79 82 85 88 72 64 64 72 80 82 85 88 72 64 62 72 77 Wind dir SE E E E E E SE SE E E E E SE SE SE SE SE E E E E Wind spd 6 10 13 12 8 6 6 8 8 11 14 12 8 6 6 6 8 13 16 11 8 Clouds SC SC B2 SC SC B2 B1 B1 SC SC B2 B2 SC SC FW FW SC SC B2 B2 SC PoP 12hr 50 50 50 30 50 QPF 12hr 0.45 0.25 0.72 0.04 0.64 Rain shwrs C C C S S C C C S S C C S S C C C C S Tstms S S S S S S Heat index 94 99100 94 89 87 84 83 94100102 95 91 88 86 86 96102103 95 90 Max heat 94 101 100 88 94 102 101 90 96 103 102 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 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 91 79 90 79 90 79 89 Temp 80 86 91 83 80 85 90 82 80 85 90 82 80 85 89 82 Dewpt 75 75 75 74 75 75 76 76 76 76 76 76 76 75 76 75 PWind dir E E E E E E E E Wind char LT GN LT GN GN GN GN GN Avg clouds SC SC SC SC SC SC SC B2 SC SC B1 B2 SC SC SC SC PoP 12hr 20 30 20 60 40 70 30 50 Rain shwrs S S C C S S L L C C L L C C C C Tstms S S S S S S $$ PRZ002-012000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 91 80 90 78 90 Temp 86 90 91 86 83 81 80 79 85 89 90 85 82 80 79 78 85 89 90 85 82 Dewpt 77 77 77 77 76 77 77 76 77 78 78 78 77 77 77 77 77 77 77 78 77 RH 75 66 64 75 80 88 91 91 77 70 68 80 85 91 94 97 77 68 66 80 85 Wind dir E SE SE SE E E E E E SE SE E E E E E E E E E E Wind spd 6 10 9 8 8 9 9 9 10 10 9 9 8 9 8 9 11 12 11 11 9 Clouds B1 SC B1 B1 SC SC B1 B2 B2 SC B1 B1 B1 B1 B2 B2 B2 B2 SC SC SC PoP 12hr 40 50 50 50 50 QPF 12hr 0.18 0.20 0.62 0.16 0.18 Rain shwrs C C C C C C C C C S C C C C C C C C C C C Tstms S S Heat index 97103104 97 90 88 85 84 96102104 96 89 86 95102102 96 89 Max heat 97 104 103 89 96 104 103 88 95 103 102 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 78 90 78 90 79 90 79 89 Temp 79 85 90 82 79 85 90 82 80 85 90 82 80 85 89 82 Dewpt 76 76 75 76 76 77 77 78 78 78 78 77 77 77 76 76 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds B1 B1 SC SC SC SC SC B2 SC SC B1 B2 SC SC B1 B2 PoP 12hr 40 30 20 60 50 70 50 60 Rain shwrs C C C C S S L L C C L L C C L L Tstms S S S S S S $$ PRZ007-012000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 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 78 89 Temp 85 89 89 84 81 79 78 77 84 89 90 85 81 80 79 78 85 88 89 84 81 Dewpt 72 71 73 74 74 74 73 72 73 73 74 74 74 74 73 73 73 73 73 73 74 RH 65 56 59 72 79 85 85 85 70 59 60 70 79 82 82 85 67 61 59 70 79 Wind dir E SE SE SE E NE NE NE E SE SE SE E E E E E E SE SE E Wind spd 4 8 9 8 6 5 4 4 6 10 10 9 6 6 4 3 5 13 12 10 8 Clouds SC B2 B2 SC SC SC SC SC FW CL FW FW FW FW FW FW SC SC SC SC FW PoP 12hr 50 10 5 5 10 QPF 12hr 0.32 0.02 0 0.01 0.04 Rain shwrs S C C C S S S S S S S Tstms S Heat index 91 94 97 91 86 83 91 97 99 92 87 84 91 96 97 90 86 Max heat 91 97 97 85 91 99 98 86 91 97 97 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 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 89 77 88 77 89 77 88 Temp 78 84 89 81 78 83 88 80 77 84 89 80 77 83 88 80 Dewpt 72 72 73 72 66 71 73 74 73 72 73 73 72 72 72 73 PWind dir NE E NE E E E NE E Wind char LT GN LT LT LT GN LT GN Avg clouds FW FW FW FW CL FW FW SC FW FW SC SC FW FW FW FW PoP 12hr 5 20 5 20 10 20 10 20 Rain shwrs S S S S S S S S C C S S S S $$ PRZ008-012000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 78 89 78 88 Temp 84 87 88 83 80 79 78 77 84 88 89 84 81 80 79 78 84 87 88 83 80 Dewpt 75 75 76 75 75 76 75 74 75 76 76 75 76 75 75 75 75 76 77 75 75 RH 74 68 68 77 85 91 91 90 74 68 66 74 85 85 88 91 74 70 70 77 85 Wind dir E E NE E E SE E E E NE E E E SE E E E E NE E E Wind spd 8 2 6 6 9 4 6 5 8 2 6 5 3 6 4 5 6 6 11 5 3 Clouds SC B2 B2 B2 B2 SC SC SC FW CL B2 B2 B1 B1 CL CL FW FW OV OV SC PoP 12hr 60 50 50 40 70 QPF 12hr 0.94 0.14 1.05 0.04 1.86 Rain shwrs C L L C S C C C C L L S Tstms S S S S S S S S S Heat index 92 97 98 91 86 92 99100 92 88 85 92 98 99 91 86 Max heat 92 99 98 84 92 100 99 86 92 100 98 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 77 89 77 87 77 88 77 87 Temp 78 84 89 81 78 83 87 80 78 83 88 80 78 83 87 80 Dewpt 75 75 76 75 75 75 77 76 76 76 77 76 75 76 76 75 PWind dir E E E E E E E E Wind char LT GN GN GN GN GN GN GN Avg clouds FW CL FW SC CL CL SC B1 FW FW SC B1 SC SC SC SC PoP 12hr 5 40 5 60 5 70 20 50 Rain shwrs S C C L L S S L L S S C C Tstms S S S S S S S S $$ PRZ010-012000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 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 76 92 75 93 Temp 87 92 93 85 80 78 76 76 85 90 92 85 80 78 76 76 85 91 93 85 80 Dewpt 75 76 78 77 77 76 75 74 76 77 78 78 76 76 76 76 76 77 78 77 77 RH 68 60 62 77 91 94 97 94 75 66 64 80 88 94100100 75 64 62 77 91 Wind dir E S N E E E E E E S N E E E E E E SE E NE E Wind spd 4 3 3 8 6 3 4 4 4 2 2 6 2 6 5 4 3 1 2 2 2 Clouds SC SC B2 OV B2 SC SC SC FW CL OV OV SC SC CL CL CL CL OV OV FW PoP 12hr 90 60 70 10 70 QPF 12hr 1.61 0.14 1.76 0.01 1.86 Rain shwrs C C D L L L S S L L Tstms S S S S S S S Heat index 96104108 96 87 94104107 96 86 95105109 96 85 Max heat 96 108 107 84 94 107 106 83 95 109 107 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 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 74 94 75 92 75 93 75 92 Temp 75 86 94 81 76 85 92 80 76 85 93 80 76 85 92 80 Dewpt 75 76 78 76 74 75 79 77 75 77 79 77 75 76 78 77 PWind dir E E E E E E E E Wind char LT LT LT LT LT LT LT LT Avg clouds FW CL SC B1 CL CL SC B1 CL CL SC B1 CL CL SC B1 PoP 12hr 5 60 0 70 0 80 5 70 Rain shwrs L L L L D D L L Tstms S S S S C C S S $$ VIZ001-012000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 81 89 81 90 Temp 86 89 90 86 83 82 81 80 85 88 89 86 83 82 81 81 86 89 90 86 83 Dewpt 77 77 77 77 77 77 77 77 77 78 78 77 77 77 77 78 78 77 77 77 77 RH 75 68 66 75 82 85 88 91 77 72 70 75 82 85 88 91 77 68 66 75 82 Wind dir E SE SE E E E E E E SE SE E E E E E E E E E E Wind spd 11 11 11 10 11 14 14 14 16 13 13 12 13 14 13 13 14 14 13 13 13 Clouds SC B1 B1 SC SC SC B1 B1 SC SC SC SC SC SC SC SC B1 B1 SC SC B1 PoP 12hr 40 40 20 40 40 QPF 12hr 0.14 0.10 0.03 0.09 0.18 Rain shwrs C C C C S S C C S S S S S S C C C C C C C Heat index 97102103 96 92 90 87 87 96101102 97 93 91 89 89 98102103 97 92 Max heat 97 103 102 91 96 102 102 92 98 103 102 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 80 90 81 90 81 91 81 89 Temp 81 86 90 84 81 86 90 84 81 87 91 84 82 86 89 83 Dewpt 76 76 76 76 76 77 78 78 78 78 78 77 77 78 77 77 PWind dir E E E E E E E E Wind char GN GN GN BZ BZ BZ BZ GN Avg clouds B1 SC SC SC SC SC SC SC SC SC SC SC SC B1 B2 SC PoP 12hr 40 20 20 50 50 50 60 60 Rain shwrs C C S S S S C C C C C C C L L C Tstms S S S S $$ VIZ002-012000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 503 AM AST Mon Sep 1 2025 Date Mon 09/01/25 Tue 09/02/25 Wed 09/03/25 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 91 80 91 79 91 Temp 86 90 91 86 83 81 80 79 86 90 91 86 83 81 80 79 86 90 91 85 82 Dewpt 76 76 76 76 76 76 77 77 77 77 77 77 76 76 76 77 77 77 77 76 76 RH 72 64 62 72 80 85 91 94 75 66 64 75 80 85 88 94 75 66 64 75 82 Wind dir E SE SE E E E E E E E SE E E E E E E E E E E Wind spd 10 12 11 10 10 11 11 11 12 13 12 11 11 11 11 12 14 14 14 12 11 Clouds SC SC B1 B1 SC SC B1 B1 SC SC SC SC SC SC SC SC B2 B2 SC SC SC PoP 12hr 40 40 20 50 50 QPF 12hr 0.15 0.12 0.03 0.10 0.13 Rain shwrs S C C C S S C C S S S S S S C C C C S S C Heat index 95101103 96 90 87 85 84 97103104 96 91 87 85 84 97102103 95 89 Max heat 95 103 102 89 97 105 103 89 97 104 102 Heat Y Y Date Thu 09/04/25 Fri 09/05/25 Sat 09/06/25 Sun 09/07/25 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 91 78 90 79 90 78 90 Temp 79 86 91 82 79 85 90 82 80 85 90 82 79 85 90 82 Dewpt 76 76 76 76 76 77 77 78 77 77 77 76 76 77 76 76 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds SC SC FW SC SC SC SC SC SC SC SC B1 B2 B1 SC SC PoP 12hr 30 20 20 50 50 60 60 50 Rain shwrs C S S S S S C C C C C L L L C C Tstms S S S S $$