Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
967 FOCA52 TJSJ 170632 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 AM AST Thu Sep 17 2026 PRZ001-172000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 93 80 92 Temp 79 86 90 91 86 83 82 81 80 88 92 93 87 84 82 81 80 87 91 92 86 83 Dewpt 76 77 77 77 77 76 77 76 76 76 76 76 76 76 76 76 75 76 76 76 76 76 RH 91 75 66 64 75 80 85 85 88 68 60 58 70 77 82 85 85 70 62 60 72 80 Wind dir SE E E E E E SE SE SE E E E E E E E SE E E E E E Wind spd 11 11 16 18 13 11 10 10 9 9 13 17 13 9 8 6 5 5 11 16 13 9 Clouds B2 B2 B2 B2 B2 OV OV B2 SC SC B2 SC SC B2 B2 B2 B2 B1 B1 B1 B1 B2 PoP 12hr 70 70 50 60 50 QPF 12hr 0.81 0.55 0.47 0.34 0.28 Rain shwrs L C C L L L L C S S C C C C C L L C C C C C Tstms S S S S S S S S Heat index 84 97103104 98 92 90 87 86 98104106 98 93 89 87 86 97103104 97 91 Max heat 97 105 104 91 98 106 105 91 97 105 103 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 92 79 92 79 92 79 91 Temp 80 87 92 83 80 87 92 83 80 87 92 83 80 86 91 83 Dewpt 75 75 76 76 75 75 76 76 75 75 76 76 75 75 76 76 PWind dir SE E SE E SE E E E Wind char LT GN LT GN GN GN LT GN Avg clouds B2 B1 SC B1 SC SC B1 SC B1 B1 SC SC B1 B1 B1 B1 PoP 12hr 50 50 40 40 40 40 40 40 Rain shwrs C C C C S C C C C C C C C C C C Tstms S S $$ PRZ002-172000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 82 90 81 90 Temp 81 86 89 90 87 84 83 82 82 87 89 90 86 84 82 81 81 86 89 90 86 84 Dewpt 77 77 77 77 77 77 77 76 76 77 77 77 77 76 76 76 75 76 76 76 76 75 RH 88 75 68 66 72 80 82 82 82 72 68 66 75 77 82 85 82 72 66 64 72 74 Wind dir SE SE SE SE E E E E E E E E E E E E E E E E E E Wind spd 14 14 14 13 13 12 12 11 10 11 12 11 10 10 10 8 8 9 10 10 10 8 Clouds B2 B2 B2 B2 OV B2 OV B2 SC SC B2 SC SC B2 B2 B2 B2 B1 B1 B1 B1 B2 PoP 12hr 70 70 60 60 50 QPF 12hr 0.67 0.47 0.43 0.34 0.19 Rain shwrs L C C L L L L C S C L C C L L L L C C C C C Tstms S S S S S S S S Heat index 89 98102103 98 95 93 90 90 98102102 97 92 90 88 87 96101101 96 92 Max heat 98 103 104 94 98 103 102 91 96 102 101 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 81 90 81 91 81 90 81 90 Temp 81 86 90 84 81 87 91 84 82 86 90 84 81 86 90 84 Dewpt 75 75 76 75 75 75 76 75 75 76 76 75 75 76 76 75 PWind dir E SE E SE E E E E Wind char LT GN GN GN GN GN GN GN Avg clouds B2 B1 B1 B1 SC SC B1 SC SC SC SC B1 B1 B1 B1 B1 PoP 12hr 50 40 40 40 30 40 40 40 Rain shwrs C C C C S C C C C C C C C C C C $$ PRZ007-172000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 91 78 91 Temp 78 85 89 90 85 82 80 79 78 86 90 91 85 82 80 79 78 86 90 91 85 81 Dewpt 75 77 79 78 78 77 76 75 74 73 73 74 74 72 72 73 72 72 70 74 72 74 RH 91 77 73 68 80 85 88 88 88 65 58 58 70 72 77 82 82 63 52 58 65 79 Wind dir E E E E E E E NE NE E SE SE SE E E E E E SE SE E E Wind spd 9 11 14 14 12 9 6 5 5 9 12 11 10 8 4 4 4 4 12 12 8 5 Wind gust 26 25 Clouds SC SC SC B2 B1 B2 SC B1 SC FW FW SC SC FW FW FW FW FW FW SC SC SC PoP 12hr 60 60 20 0 30 QPF 12hr 0.24 0.24 0.07 0.03 0.05 Rain shwrs C S C C C L C C C S S S S C Tstms S S S Heat index 95104104 96 89 85 92 98100 93 86 84 92 96100 91 87 Max heat 95 106 104 87 92 100 100 85 92 100 99 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 90 77 91 77 90 77 90 Temp 78 85 90 81 78 85 91 81 78 85 90 81 78 85 90 81 Dewpt 73 72 71 72 71 73 73 74 73 71 72 73 72 71 73 74 PWind dir E E E E E E NE E Wind char LT GN LT GN LT GN LT GN Avg clouds SC FW FW SC CL FW SC SC CL CL FW FW CL CL FW FW PoP 12hr 30 30 5 20 0 5 0 10 Rain shwrs C S C C S S S S S S $$ PRZ008-172000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 78 89 77 88 Temp 78 84 88 89 84 81 80 79 78 84 88 89 84 81 79 78 77 83 87 88 83 80 Dewpt 75 77 78 77 78 78 77 75 75 77 78 77 78 78 77 75 74 77 77 77 77 77 RH 91 80 72 68 82 91 91 88 91 80 72 68 82 91 94 91 90 82 72 70 82 91 Wind dir E E E E E E E E E E E NE E E E E E E E NE E E Wind spd 9 9 6 8 9 6 10 9 9 10 6 9 14 17 9 9 8 4 6 11 9 9 Clouds FW SC SC OV OV B2 B2 FW FW FW FW SC B2 SC SC SC SC FW FW B2 B2 B1 PoP 12hr 90 60 60 20 60 QPF 12hr 1.25 0.21 0.92 0.12 0.63 Rain shwrs S S S D D L C S L S S S S L L C Tstms S S S S S S S Heat index 94102101 95 90 85 94102102 95 88 92 99100 92 85 Max heat 94 105 104 89 94 102 101 86 92 100 99 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 88 77 88 76 88 76 88 Temp 77 83 88 80 78 83 88 80 77 83 88 80 77 83 88 80 Dewpt 75 77 77 77 74 76 77 77 75 76 77 77 74 76 77 77 PWind dir E E E E E E E E Wind char LT LT LT GN LT GN GN GN Avg clouds SC SC SC B1 SC SC SC SC FW FW FW SC FW FW SC SC PoP 12hr 40 60 20 30 0 30 5 30 Rain shwrs C S L L S S C C C C S S C Tstms S S $$ PRZ010-172000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 94 76 94 76 94 Temp 77 86 92 94 86 81 79 77 77 86 92 94 86 81 79 77 77 86 92 94 86 81 Dewpt 74 77 80 79 79 77 76 75 74 76 79 78 79 78 77 75 74 76 79 78 79 77 RH 90 75 68 62 80 88 91 94 90 72 66 60 80 91 94 94 90 72 66 60 80 88 Wind dir NE E SE SE E E E NE E E E NE NE SE E E E E SE W NE E Wind spd 5 6 13 16 10 10 5 4 3 4 3 4 6 3 4 3 3 3 2 4 3 4 Clouds FW SC SC OV B2 B1 SC SC SC FW FW SC OV B2 B2 FW FW FW FW OV OV B1 PoP 12hr 70 40 80 50 80 QPF 12hr 0.74 0.19 1.23 0.14 1.07 Rain shwrs S S S L C C C S S S D C C D D C Tstms S S S S S S S Heat index 98107107100 89 97109110100 90 97109110 99 88 Max heat 98 107 107 87 97 111 109 88 97 111 109 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 75 94 75 94 75 94 75 93 Temp 76 86 94 81 76 86 94 81 76 86 94 81 76 85 93 80 Dewpt 75 77 78 77 75 76 78 77 75 76 78 77 75 76 78 77 PWind dir E SE E SE E E E SE Wind char LT LT LT LT LT LT LT LT Avg clouds SC FW SC B1 FW FW SC B1 CL CL SC SC CL CL SC B2 PoP 12hr 40 70 5 60 0 50 0 60 Rain shwrs C L L L L C C L L Tstms S S S S S S S S $$ VIZ001-172000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 82 89 82 91 Temp 82 86 88 89 86 84 83 82 82 86 88 89 86 84 83 82 82 87 90 91 87 85 Dewpt 78 78 77 77 77 77 78 78 77 75 75 75 75 74 75 75 74 74 74 73 73 73 RH 88 77 70 68 75 80 85 88 85 70 66 64 70 72 77 79 77 65 60 56 63 67 Wind dir E E SE E E E E E E E E E E E E E E E E E E E Wind spd 23 19 20 18 17 18 18 16 14 16 16 12 13 16 13 14 12 12 11 11 11 11 Clouds B2 B1 B2 OV B2 SC SC SC SC B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 70 40 40 40 40 QPF 12hr 0.52 0.16 0.06 0.13 0.19 Rain shwrs L C C L L C S S S C C S C C C C C C C C C C Tstms S S S S Heat index 92 98101102 97 94 93 92 90 95 98 98 95 91 91 89 88 96 99100 95 92 Max heat 98 102 101 94 95 99 98 91 96 100 99 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 82 89 82 89 82 91 82 91 Temp 82 86 89 84 82 86 89 84 82 87 91 85 82 87 91 85 Dewpt 74 74 73 73 74 74 73 74 74 74 73 74 75 74 73 74 PWind dir E E E SE E E E E Wind char GN GN GN GN GN BZ BZ GN Avg clouds B1 B1 B1 SC SC SC SC SC FW SC SC SC SC SC SC SC PoP 12hr 40 40 30 30 30 30 20 30 Rain shwrs C C C C S C C S S C C S S S C C $$ VIZ002-172000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 AM AST Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 81 89 81 91 Temp 81 87 90 91 87 84 83 82 81 86 88 89 86 83 82 81 81 87 90 91 87 84 Dewpt 77 78 78 78 77 77 77 77 77 77 77 77 77 77 77 76 76 76 76 76 76 76 RH 88 75 68 66 72 80 82 85 88 75 70 68 75 82 85 85 85 70 64 62 70 77 Wind dir E E SE E E E E E E E E E E E E E E E E E E E Wind spd 19 18 20 18 16 14 16 13 12 14 14 13 13 14 13 11 10 10 11 12 11 10 Clouds SC B1 OV B2 B2 B1 SC SC SC B1 SC SC SC SC SC B1 B1 B1 B1 SC SC SC PoP 12hr 70 40 40 40 40 QPF 12hr 0.51 0.18 0.06 0.12 0.14 Rain shwrs C C L L L C C S S C C C S C C C C C C C C C Tstms S S S S Heat index 89100105106 98 94 91 89 89 96100101 96 92 90 88 88 97102102 97 93 Max heat 100 106 105 93 96 101 100 91 97 103 102 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 81 88 81 89 81 88 80 88 Temp 82 85 88 83 81 86 89 83 81 85 88 82 80 85 88 82 Dewpt 76 76 76 76 76 76 76 76 76 76 76 76 76 76 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 FW FW SC SC SC SC SC SC SC SC SC PoP 12hr 40 30 10 20 30 30 20 30 Rain shwrs C C C C S S S S S C C S S S C C $$