Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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784 FOCA52 TJSJ 180632 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 AM AST Fri Sep 18 2026 PRZ001-182000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 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 80 92 79 92 Temp 80 86 89 90 86 83 82 81 80 87 91 92 86 83 81 80 79 87 91 92 86 83 Dewpt 76 75 75 75 75 75 75 75 75 75 75 76 76 75 76 75 75 75 75 76 75 75 RH 88 70 64 62 70 77 79 82 85 68 60 60 72 77 85 85 88 68 60 60 70 77 Wind dir SE E E E E E E SE SE E E E E E SE SE SE SE E E E SE Wind spd 9 8 13 14 12 9 9 8 5 6 11 14 13 8 8 5 5 8 12 14 12 8 Clouds SC SC SC SC SC SC B2 B2 SC SC FW B1 B1 SC SC SC SC SC SC B2 B2 SC PoP 12hr 20 50 40 30 50 QPF 12hr 0.06 0.16 0.33 0.10 0.39 Rain shwrs S S S S S S C C C S C C S S C C C C C C S Tstms S S Heat index 86 95 99100 94 90 88 86 85 96102104 97 90 88 84 84 96102104 96 90 Max heat 95 100 100 89 96 105 103 89 96 105 103 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 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 91 79 91 Temp 80 87 92 83 80 87 92 83 80 86 91 83 80 86 91 83 Dewpt 75 75 76 75 75 75 75 75 75 75 76 76 75 75 76 76 PWind dir SE E SE E E E SE E Wind char LT GN GN GN GN GN LT GN Avg clouds SC SC SC SC SC SC SC SC FW SC SC SC SC SC SC SC PoP 12hr 30 20 20 30 10 20 20 30 Rain shwrs C C S S S S C C S S S S S S C C $$ PRZ002-182000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 81 90 81 90 Temp 82 87 89 90 86 84 82 81 81 86 89 90 86 84 82 81 81 86 89 90 86 84 Dewpt 76 76 76 75 76 75 75 74 74 76 76 76 76 75 75 75 75 75 75 75 75 75 RH 82 70 66 62 72 74 79 79 79 72 66 64 72 74 79 82 82 70 64 62 70 74 Wind dir E E E E E E E E E E E E E E E E E E SE SE SE E Wind spd 10 12 12 11 10 9 10 9 8 8 11 9 8 8 8 6 8 9 11 9 8 8 Clouds SC B1 SC SC SC SC B2 SC B1 B1 SC SC SC B1 B1 B1 B1 SC SC SC SC SC PoP 12hr 40 60 40 40 30 QPF 12hr 0.09 0.17 0.14 0.15 0.24 Rain shwrs S C S S S S L C C C S C C C C C C C C C C C Heat index 90 97100101 96 92 89 87 87 96101102 96 91 89 88 87 95 99100 95 91 Max heat 97 101 100 91 96 102 102 91 95 101 100 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 81 90 81 90 80 90 81 89 Temp 81 86 90 84 81 86 90 83 81 86 90 84 81 86 89 83 Dewpt 75 75 75 75 75 76 76 75 75 75 76 76 75 76 76 75 PWind dir SE SE E E E E E SE Wind char GN GN GN GN GN GN GN GN Avg clouds B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 PoP 12hr 50 30 30 30 30 30 30 40 Rain shwrs C C C C C C C C C C C C C C C C $$ PRZ007-182000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 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 93 77 90 77 90 Temp 78 87 92 93 86 82 80 78 77 85 89 90 84 81 79 78 77 85 89 90 84 81 Dewpt 74 72 72 73 74 73 71 70 71 75 77 78 78 77 76 74 73 76 77 77 77 76 RH 88 61 52 52 68 74 74 76 82 72 68 68 82 88 91 88 87 75 68 66 80 85 Wind dir NE E SE SE SE E NE NE NE E SE SE SE E E NE NE E SE SE SE E Wind spd 6 8 12 11 11 8 5 3 3 5 11 11 9 5 4 3 4 6 11 10 6 4 Clouds SC FW FW SC SC FW SC FW SC SC SC SC SC FW FW B1 B1 FW FW FW FW FW PoP 12hr 10 20 20 40 0 QPF 12hr 0.03 0.02 0.15 0.10 0.01 Rain shwrs C S S S S S S S S C C Heat index 94100102 94 87 83 93101104 96 88 83 94101103 95 87 Max heat 94 102 102 86 93 105 103 87 94 103 102 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 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 90 76 90 76 89 Temp 78 85 90 81 78 85 90 80 77 84 90 80 77 84 89 81 Dewpt 74 76 77 76 74 71 72 74 72 72 74 74 72 75 77 76 PWind dir E E E E E E E E Wind char LT GN LT GN LT GN LT GN Avg clouds SC SC SC SC FW FW SC SC SC SC SC SC FW FW SC SC PoP 12hr 30 20 5 10 20 20 10 10 Rain shwrs C C S S S S S S S S S S S S $$ PRZ008-182000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 77 88 76 88 Temp 78 84 87 88 83 80 79 78 77 83 87 88 83 80 78 77 76 83 87 88 83 80 Dewpt 75 76 77 77 77 77 76 74 73 76 77 77 77 77 76 75 74 77 77 77 77 77 RH 91 77 72 70 82 91 91 88 87 80 72 70 82 91 94 94 94 82 72 70 82 91 Wind dir E E E NE E E E E E E E NE E E E E E E E NE NE E Wind spd 8 8 8 12 13 14 10 10 8 6 6 8 8 12 9 8 9 9 4 6 5 5 Clouds CL FW FW SC B2 SC FW FW SC FW FW SC SC SC SC SC SC SC SC OV OV B2 PoP 12hr 60 20 30 20 80 QPF 12hr 0.44 0.03 0.18 0.05 1.24 Rain shwrs S L S S C C S S S S S S D D C Tstms S S S S Heat index 92 99 99 93 87 92 99100 92 85 92 99100 92 85 Max heat 92 100 99 85 92 102 100 92 100 99 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 88 77 88 77 88 76 87 Temp 77 83 88 80 78 83 88 80 78 83 88 80 77 82 87 79 Dewpt 75 76 77 77 75 76 77 77 74 76 77 77 74 77 77 77 PWind dir SE E E E E E E NE Wind char LT LT LT GN GN GN GN LT Avg clouds B1 FW SC SC FW FW FW SC CL CL FW SC FW FW SC B1 PoP 12hr 50 40 5 30 0 20 5 60 Rain shwrs C C C C C S S S S L L Tstms S $$ PRZ010-182000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 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 92 76 94 75 93 Temp 77 86 91 92 85 81 79 77 77 86 92 94 86 81 78 76 76 85 91 93 85 80 Dewpt 74 75 77 76 78 76 76 74 73 76 78 78 78 77 76 75 74 77 78 78 78 77 RH 90 70 64 60 80 85 91 90 87 72 64 60 77 88 94 97 94 77 66 62 80 91 Wind dir NE E E NW E SE E E E E SW W NE E E E E E S W NE E Wind spd 4 5 2 6 6 4 5 4 2 3 3 3 4 4 5 5 4 4 1 2 3 4 Clouds SC FW FW B1 OV B2 FW FW FW FW FW OV OV B2 B2 FW FW FW FW B2 B2 SC PoP 12hr 70 60 80 50 50 QPF 12hr 0.75 0.20 1.11 0.09 0.38 Rain shwrs S C L L D D C C C C S Tstms S S S S S S S S Heat index 95104104 96 87 97108110 98 88 96107108 97 87 Max heat 95 105 104 85 97 112 109 85 96 109 107 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 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 93 75 92 75 92 75 94 Temp 76 85 93 80 76 85 92 80 76 85 92 80 76 86 94 81 Dewpt 75 76 78 77 75 76 78 77 75 76 78 77 75 76 77 77 PWind dir E SE E NE E N E SE Wind char LT LT LT LT LT LT LT LT Avg clouds SC FW SC B1 CL CL SC SC CL CL SC B1 SC SC SC B1 PoP 12hr 20 60 0 50 0 50 20 60 Rain shwrs S L L C C C C S S L L Tstms S S S S S S $$ VIZ001-182000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 82 88 82 89 Temp 83 87 90 90 87 85 83 82 82 85 87 88 85 84 83 82 82 86 88 89 86 84 Dewpt 77 76 75 74 75 75 76 75 75 76 75 75 76 75 76 76 76 75 75 74 75 75 RH 82 70 62 60 68 72 80 79 79 75 68 66 75 74 80 82 82 70 66 61 70 74 Wind dir E E E E E E E E E E E E E E E E E E SE SE E E Wind spd 17 14 12 13 12 13 14 13 12 12 12 10 11 11 12 11 10 12 12 11 11 12 Clouds SC SC SC SC SC SC SC SC B1 SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 40 30 30 30 QPF 12hr 0.03 0.08 0.06 0.08 0.08 Rain shwrs S C S S S S C S C S S S S C C S S C C C C S Heat index 92 98100100 96 93 91 90 89 95 97 98 95 92 91 90 90 95 98 98 95 92 Max heat 98 100 100 92 95 98 97 92 95 99 98 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 82 91 82 91 81 89 82 89 Temp 82 87 91 85 82 87 91 84 82 86 89 84 82 86 89 84 Dewpt 76 75 75 75 76 74 73 74 74 74 73 73 75 76 75 76 PWind dir E SE E E E E E E Wind char GN GN GN GN BZ GN GN GN Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 30 20 20 20 20 20 Rain shwrs C C C C C C S S S S S S S S S S $$ VIZ002-182000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 AM AST Fri Sep 18 2026 Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26 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 88 81 91 Temp 82 87 90 91 86 83 82 81 80 85 87 88 85 83 82 81 81 87 90 91 87 84 Dewpt 77 76 76 76 75 76 76 76 75 76 76 76 75 75 76 75 75 76 76 76 75 75 RH 85 70 64 62 70 80 82 85 85 75 70 68 72 77 82 82 82 70 64 62 68 74 Wind dir E E E E E E E E E E E E E E E E E E SE SE E E Wind spd 13 13 13 12 12 13 13 11 10 10 11 10 11 10 10 9 9 10 12 11 11 9 Clouds SC FW SC FW SC SC SC B2 B2 B1 SC SC SC FW FW FW FW FW FW SC SC SC PoP 12hr 20 50 40 0 20 QPF 12hr 0.02 0.16 0.06 0 0.03 Rain shwrs S S S S S C C C S S S S S S Heat index 90 98102103 96 91 89 86 85 94 98 99 93 91 90 87 87 97102103 96 92 Max heat 98 103 102 90 94 99 98 90 97 103 102 Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 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 88 80 91 81 90 Temp 82 85 88 83 81 85 88 82 80 86 91 84 82 86 90 84 Dewpt 76 76 76 75 76 76 75 76 76 76 76 76 76 76 77 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 SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 30 20 20 20 20 20 Rain shwrs S C C C C C S S S S S S S S S S $$