Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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706 FOCA52 TJSJ 171832 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 PM AST Thu Sep 17 2026 PRZ001-180800- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 80 93 80 92 79 Temp 86 83 82 81 80 88 92 93 87 84 82 81 80 87 91 92 86 83 81 80 79 87 Dewpt 77 76 77 76 76 76 76 76 76 76 76 76 75 76 76 76 76 76 76 75 75 75 RH 75 80 85 85 88 68 60 58 70 77 82 85 85 70 62 60 72 80 85 85 88 68 Wind dir E E E SE SE E E E E E E SE SE E E E E E SE SE SE SE Wind spd 13 9 10 9 9 8 13 14 12 9 9 8 6 5 11 16 13 9 8 5 5 8 Clouds B2 B2 B2 B1 SC SC B2 SC SC B1 B2 B2 B2 B1 B1 B1 B1 B2 B2 B2 B2 SC PoP 12hr 50 50 60 50 50 QPF 12hr 0.55 0.47 0.34 0.28 0.19 Rain shwrs C C C C S S C C C C C L C C C C C C C C C S Tstms S Heat index 98 92 90 87 86 98104106 98 93 89 87 86 97103104 97 91 88 84 84 96 Max heat 104 91 98 106 105 91 97 105 103 90 96 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 92 79 92 79 92 79 91 79 92 Temp 92 83 80 87 92 83 80 87 92 83 80 86 91 83 80 87 92 83 Dewpt 76 76 75 75 76 76 75 75 76 76 75 75 76 76 75 75 73 74 PWind dir E SE E SE E E E SE E Wind char GN LT GN LT GN GN GN LT GN Avg clouds SC B1 SC SC B1 SC B1 B1 SC SC B1 B1 B1 B1 SC SC SC SC PoP 12hr 50 40 40 40 40 40 40 20 20 Rain shwrs C C S C C C C C C C C C C C S S S S Tstms S S $$ PRZ002-180800- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 82 90 81 90 81 Temp 87 84 83 82 82 87 89 90 86 84 82 81 81 86 89 90 86 84 82 81 81 86 Dewpt 77 77 77 76 76 77 77 77 77 76 76 76 75 76 76 76 76 75 75 75 75 75 RH 72 80 82 82 82 72 68 66 75 77 82 85 82 72 66 64 72 74 79 82 82 70 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 12 11 11 11 9 12 12 11 10 9 10 9 8 6 11 9 9 9 8 6 6 9 Clouds B2 B1 B2 B1 SC SC B2 SC SC B1 B2 B2 B2 B1 B1 B1 B1 B2 B2 B2 B2 B1 PoP 12hr 50 60 60 50 50 QPF 12hr 0.47 0.43 0.34 0.19 0.21 Rain shwrs L C C C S C L C C C L L C C C C C C C C C C Tstms S Heat index 98 95 93 90 90 98102102 97 92 90 88 87 96101101 96 92 90 88 87 96 Max heat 104 94 98 103 102 91 96 102 101 91 96 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 81 91 81 90 81 90 81 90 Temp 90 84 81 87 91 84 82 86 90 84 81 86 90 84 81 86 90 84 Dewpt 76 75 75 75 76 75 75 76 76 75 75 76 76 75 75 76 76 73 PWind dir SE SE SE E E E E E SE Wind char GN GN GN GN GN GN GN GN GN Avg clouds B1 B1 SC SC B1 SC SC SC SC B1 B1 B1 B1 B1 SC SC B1 B1 PoP 12hr 40 40 40 30 40 40 40 30 40 Rain shwrs C C S C C C C C C C C C C C C C C C Tstms S S $$ PRZ007-180800- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 78 91 78 91 77 Temp 85 82 80 79 78 86 90 91 85 82 80 79 78 86 90 91 85 81 79 78 77 85 Dewpt 78 77 76 75 74 73 73 74 74 72 72 73 72 72 70 74 72 74 74 73 74 72 RH 80 85 88 88 88 65 58 58 70 72 77 82 82 63 52 58 65 79 85 85 90 65 Wind dir E E E NE NE E SE SE SE E NE NE NE E SE SE SE E E NE NE E Wind spd 12 9 6 8 6 8 12 13 11 8 5 4 3 4 12 11 9 6 5 4 4 5 Clouds SC B1 SC SC SC FW FW SC SC SC CL CL FW FW FW SC SC SC SC SC SC CL PoP 12hr 40 20 20 30 30 QPF 12hr 0.24 0.07 0.03 0.05 0.04 Rain shwrs C C S C C S S S S S S C C S S Heat index 96 89 85 92 98100 93 86 84 92 96100 91 87 83 90 Max heat 104 87 92 100 100 85 92 100 99 85 90 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 77 91 77 90 77 90 77 90 Temp 90 81 78 85 91 81 78 85 90 81 78 85 90 81 78 85 90 81 Dewpt 71 72 71 73 73 74 73 71 72 73 72 71 73 74 73 73 74 75 PWind dir SE E E E E E E E E Wind char GN LT GN LT GN LT GN LT GN Avg clouds FW SC CL FW SC SC CL CL FW FW CL CL FW FW CL FW FW FW PoP 12hr 30 5 20 0 5 0 10 0 10 Rain shwrs C C S S S S S S S S $$ PRZ008-180800- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 78 89 77 88 76 Temp 84 81 80 79 78 84 88 89 84 81 79 78 77 83 87 88 83 80 78 77 76 83 Dewpt 78 78 77 75 75 77 78 77 78 78 77 75 74 77 77 77 77 77 77 75 75 77 RH 82 91 91 88 91 80 72 68 82 91 94 91 90 82 72 70 82 91 97 94 97 82 Wind dir E E E E E E E NE E E E E E E E NE E E E E E E Wind spd 14 10 10 8 8 9 8 11 13 17 10 11 6 5 6 8 11 12 9 5 9 9 Clouds OV B1 B1 CL CL FW FW SC B2 SC SC SC SC FW FW B2 B2 B1 B1 SC SC FW PoP 12hr 40 50 30 60 40 QPF 12hr 0.21 0.92 0.12 0.63 0.08 Rain shwrs L C C S C C S S S L L C C S S Tstms S S S S Heat index 95 90 85 94102102 95 88 92 99100 92 85 91 Max heat 104 89 94 102 101 86 92 100 99 91 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 77 88 76 88 76 88 77 88 Temp 88 80 78 83 88 80 77 83 88 80 77 83 88 80 78 83 88 80 Dewpt 77 77 74 76 77 77 75 76 77 77 74 76 77 77 74 76 75 75 PWind dir E E NE E E E E E NE Wind char LT LT LT LT GN GN LT LT LT Avg clouds SC B1 SC SC SC SC FW FW FW SC FW FW SC SC SC SC SC B1 PoP 12hr 60 20 30 0 30 5 30 30 60 Rain shwrs L L S S C C C C S S C C C L L Tstms S S S S $$ PRZ010-180800- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 76 94 76 94 75 Temp 86 81 79 77 77 86 92 94 86 81 79 77 77 86 92 94 86 81 78 76 76 86 Dewpt 79 77 76 75 74 76 79 78 79 78 77 75 74 76 79 78 79 77 77 75 75 77 RH 80 88 91 94 90 72 66 60 80 91 94 94 90 72 66 60 80 88 97 97 97 75 Wind dir SE E E E NE E E NW E E E E E E E NW E E E E E E Wind spd 5 8 6 4 4 4 2 8 8 6 5 4 2 3 2 4 4 5 5 4 3 3 Clouds B1 B1 SC SC SC FW FW SC OV B2 B2 CL CL FW FW OV OV B1 B1 FW FW CL PoP 12hr 40 70 60 80 40 QPF 12hr 0.19 1.23 0.14 1.07 0.06 Rain shwrs C C S S S S L L C D D C C Tstms S S S S Heat index 100 89 97109110100 90 97109110 99 88 97 Max heat 107 87 97 111 109 88 97 111 109 85 97 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 94 75 94 75 94 75 93 75 94 Temp 94 81 76 86 94 81 76 86 94 81 76 85 93 80 76 86 94 81 Dewpt 78 77 75 76 78 77 75 76 78 77 75 76 78 77 75 76 74 75 PWind dir SE E SE E NE E N E SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B1 FW FW SC B1 CL CL SC SC CL CL SC B2 SC SC SC B1 PoP 12hr 70 5 60 0 50 0 60 30 60 Rain shwrs L L L L C C L L C C L L Tstms S S S S S S S S S S $$ VIZ001-180800- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 82 89 82 91 82 Temp 86 84 83 82 82 86 88 89 86 84 83 82 82 87 90 91 87 85 83 82 82 86 Dewpt 77 77 78 78 77 75 75 75 75 74 75 75 74 74 74 73 73 73 74 74 75 74 RH 75 80 85 88 85 70 66 64 70 72 77 79 77 65 60 56 63 67 74 77 79 68 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 17 18 16 14 16 14 13 12 12 14 14 13 13 12 11 11 11 12 12 11 11 12 Clouds B2 SC SC SC SC B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 40 40 40 40 40 QPF 12hr 0.16 0.06 0.13 0.19 0.20 Rain shwrs C C S S S C C S C S C C C C C C C C C C C C Tstms S Heat index 97 94 93 92 90 95 98 98 95 91 91 89 88 96 99100 95 92 90 89 89 94 Max heat 101 94 95 99 98 91 96 100 99 91 94 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 89 82 89 82 91 82 91 82 91 Temp 89 84 82 86 89 84 82 87 91 85 82 87 91 85 82 87 91 85 Dewpt 73 73 74 74 73 74 74 74 73 74 75 74 73 74 74 74 76 74 PWind dir E E E E E E E E E Wind char GN GN GN GN GN BZ GN GN GN Avg clouds B1 SC SC SC SC SC FW SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 40 30 30 30 30 20 30 30 20 Rain shwrs C C S C C S S C C S S S C C C C S S $$ VIZ002-180800- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 PM AST Thu Sep 17 2026 Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 81 89 81 91 81 Temp 87 84 83 82 81 86 88 89 86 83 82 81 81 87 90 91 87 84 83 82 81 85 Dewpt 77 77 77 77 77 77 77 77 77 77 77 76 76 76 76 76 76 76 76 76 75 76 RH 72 80 82 85 88 75 70 68 75 82 85 85 85 70 64 62 70 77 80 82 82 75 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 16 14 14 13 12 14 14 13 12 13 13 12 11 10 11 12 11 10 10 9 9 11 Clouds B2 B1 SC SC SC B1 SC SC SC SC SC B1 B1 B1 B1 SC SC SC SC B1 B1 SC PoP 12hr 40 40 40 40 40 QPF 12hr 0.18 0.06 0.12 0.14 0.16 Rain shwrs C C S S S C C C S S C C C C C C C C C C C C Tstms S Heat index 98 94 91 89 89 96100101 96 92 90 88 88 97102102 97 93 90 88 87 94 Max heat 105 93 96 101 100 91 97 103 102 92 94 Date 09/20 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 81 89 81 88 80 88 80 91 Temp 88 83 81 86 89 83 81 85 88 82 80 85 88 82 80 86 91 83 Dewpt 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 71 75 PWind dir SE E E E E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds SC SC SC FW FW SC SC SC SC SC SC SC SC SC SC SC SC FW PoP 12hr 30 10 20 30 30 20 30 20 10 Rain shwrs C C S S S S S C C S S S C C S S S S $$