Area Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
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948 FOCA52 TJSJ 180631 AFMSJU Area Forecast Matrices National Weather Service San Juan PR 231 AM AST Tue Aug 18 2026 PRZ001-182000- San Juan and Vicinity- Including the cities of Bayamon, Carolina, Catano, Guaynabo, San Juan, Toa Alta, Toa Baja, and Trujillo Alto 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 84 90 93 73 78 82 83 90 93 73 78 82 84 91 93 Temp 79 85 89 90 86 82 80 78 79 85 89 90 86 82 80 79 79 86 90 91 87 82 Dewpt 75 76 75 77 77 77 76 76 76 77 77 78 77 77 77 76 76 77 76 75 75 75 RH 88 75 64 66 75 85 88 94 91 77 68 68 75 85 91 91 91 75 64 60 68 79 Wind dir E E E E E E E E SE SE SE SE SE SE SE SE SE E E E E E Wind spd 4 5 12 14 12 8 6 6 6 8 10 13 9 6 6 5 6 10 13 14 13 9 Wind gust 25 23 Clouds FW FW SC SC B1 SC FW SC SC B1 B1 SC SC B1 B1 B1 B1 SC SC SC SC CL PoP 12hr 40 40 50 50 30 QPF 12hr 0.14-0.21 0.02-0.36 0.17-0.37 0.16-0.33 0.04-0.31 Snow 12hr MM MM MM Rain shwrs IS IS IS IS SC IS IS IS SC SC SC SC SC SC SC SC SC SC SC SC Tstms IS IS IS IS IS IS Heat index 82 95100103 97 89 85 80 82 96102104 98 89 85 81 82 97102102 96 88 Max heat 101 112 111 93 102 111 110 94 103 112 109 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 78 90 78 90 78 90 78 90 Temp 79 85 90 82 79 85 90 82 79 85 90 82 79 86 90 82 Dewpt 74 75 75 75 75 76 76 75 75 76 77 76 76 77 78 77 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds CL FW FW SC SC SC SC SC SC SC SC B1 SC SC SC SC PoP 12hr 0 30 30 30 20 40 30 30 Rain shwrs IS IS SC SC SC IS IS IS SC SC IS IS IS IS $$ PRZ002-182000- Northeast- Including the cities of Ceiba, Canovanas, Fajardo, Humacao, Loiza, Luquillo, Naguabo, and Rio Grande 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 75 88 94 66 77 82 75 88 94 67 78 82 75 88 94 Temp 79 84 87 88 85 81 79 78 78 84 87 88 85 81 80 79 79 84 87 88 85 81 Dewpt 74 74 74 74 75 75 75 75 75 75 75 76 75 75 75 75 75 75 74 74 73 73 RH 85 72 65 63 72 82 88 91 91 74 68 68 72 82 85 88 88 74 65 63 67 77 Wind dir E E E E E E E E E SE SE SE SE SE E E E E E E E E Wind spd 6 9 12 12 11 9 9 9 10 10 10 11 9 8 9 9 9 13 13 13 12 12 Wind gust 19 23 19 19 20 20 19 19 24 24 Clouds SC SC SC SC SC SC SC B2 B2 B2 B2 B1 B1 B2 B2 B1 B1 B2 B2 SC SC CL PoP 12hr 30 60 70 60 60 QPF 12hr 0.10-0.21 0.28-0.54 0.34-0.49 0.33 0.30 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS IS NM SC NM NM SC SC NM NM SC SC NM NM IS IS Tstms IS IS IS IS IS IS IS IS IS IS Heat index 81 91 96 97 93 86 84 80 81 92 97 98 93 87 85 82 83 92 96 97 92 87 Max heat 97 105 104 93 99 106 105 94 99 105 104 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 78 88 77 88 78 88 78 88 Temp 79 84 88 81 78 84 88 81 78 84 88 81 79 84 88 81 Dewpt 73 73 74 74 74 74 74 74 74 74 75 75 74 75 76 75 PWind dir E E E E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds CL FW SC SC B1 B1 SC SC SC SC B1 B1 SC SC SC SC PoP 12hr 5 30 30 30 30 40 30 30 Rain shwrs IS IS SC SC SC SC IS IS SC SC SC SC SC SC IS $$ PRZ003-182000- Southeast- Including the cities of Arroyo, Guayama, Maunabo, Patillas, Salinas, and Yabucoa 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 80 89 94 69 77 82 78 87 94 69 77 82 79 88 94 Temp 78 84 88 89 85 81 79 78 78 83 87 87 84 81 79 78 79 84 87 88 85 81 Dewpt 73 74 74 75 75 75 75 75 75 76 76 76 76 76 76 75 75 76 75 74 74 73 RH 85 72 63 64 72 82 88 91 91 80 70 70 77 85 91 91 88 77 68 63 70 77 Wind dir NE E E E E NE NE NE E E SE SE SE E E E E E E E E E Wind spd 5 6 13 13 11 9 8 8 8 9 10 9 8 6 8 8 8 12 12 13 11 10 Wind gust 27 28 24 20 23 25 27 24 20 Clouds FW FW SC SC SC SC SC B1 B1 B1 B1 B1 B1 SC SC SC SC B1 B1 FW FW CL PoP 12hr 20 40 50 50 50 QPF 12hr 0.06-0.16 0.05-0.50 0.21-0.47 0.06-0.29 0.04-0.30 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS SC SC SC SC SC SC IS IS SC SC SC SC IS IS Tstms IS IS IS IS IS IS IS IS IS IS Heat index 80 92 97 99 94 87 83 80 81 92 98 99 94 87 84 81 82 93 98 98 92 86 Max heat 101 109 108 93 100 109 108 94 103 109 107 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 89 77 89 77 89 78 89 Temp 78 84 89 81 78 84 89 81 78 84 89 81 79 85 89 81 Dewpt 73 74 73 73 74 74 74 74 74 75 75 75 75 75 76 75 PWind dir E E NE E E E E E Wind char GN GN GN GN GN GN GN GN Avg clouds CL FW FW SC SC SC SC FW FW FW SC SC SC SC SC FW PoP 12hr 0 20 20 20 20 20 30 30 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS IS $$ PRZ004-182000- Eastern Interior- Including the cities of Aguas Buenas, Caguas, Cayey, Cidra, Comerio, Gurabo, Juncos, Las Piedras, and San Lorenzo 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 78 88 94 69 74 78 77 87 93 69 75 78 77 87 93 Temp 75 83 87 88 84 79 77 75 75 82 86 87 83 79 77 76 76 82 86 87 83 79 Dewpt 72 74 73 73 74 74 74 74 74 75 75 75 75 74 74 74 74 75 74 73 72 72 RH 90 74 63 61 72 85 90 97 97 79 70 68 77 85 90 94 94 79 68 63 70 79 Wind dir E E E E E E E E E SE SE SE SE SE SE E E E E E E E Wind spd 2 4 11 11 10 5 3 4 4 8 9 10 8 4 5 4 5 10 11 12 10 6 Clouds FW FW SC SC SC SC FW SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC CL PoP 12hr 10 40 40 40 40 QPF 12hr 0.06-0.16 0.03-0.45 0.18-0.43 0.10-0.33 0.04-0.31 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS IS SC SC SC SC SC SC SC SC SC SC SC IS IS Tstms IS IS IS IS IS IS IS IS IS IS Heat index 89 95 96 91 82 88 95 96 90 81 90 95 95 89 81 Max heat 100 107 106 90 101 109 108 90 101 107 105 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 74 87 74 87 74 87 75 88 Temp 75 82 87 79 75 82 87 79 75 82 87 79 76 83 88 79 Dewpt 72 73 72 73 72 74 72 73 73 74 74 74 73 75 75 74 PWind dir E E E E E E E E Wind char LT GN LT GN LT GN LT GN Avg clouds CL FW FW SC SC SC SC SC FW SC SC SC SC SC SC SC PoP 12hr 0 30 30 30 20 30 30 30 Rain shwrs SC SC IS IS IS IS IS IS IS SC IS IS IS IS $$ PRZ005-182000- North Central- Including the cities of Arecibo, Barceloneta, Dorado, Florida, Manati, Vega Alta, and Vega Baja 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 84 90 94 73 76 82 84 89 94 73 75 82 84 91 94 Temp 77 85 89 90 85 80 78 77 77 84 89 89 85 80 78 76 77 85 90 91 86 81 Dewpt 74 76 76 77 77 77 76 75 75 77 78 79 78 77 76 75 75 77 77 76 76 75 RH 90 75 66 66 77 91 94 94 94 80 70 73 80 91 94 97 94 77 66 62 72 82 Wind dir E E E NE NE E E E SE E E E SE SE SE SE SE E E E E E Wind spd 4 5 12 17 14 12 8 6 6 8 10 11 5 4 5 5 5 9 12 16 16 11 Wind gust 29 27 24 21 23 31 28 Clouds CL CL FW SC SC FW CL CL FW SC FW B1 B1 B1 B1 B1 B1 FW FW SC SC CL PoP 12hr 30 5 50 40 20 QPF 12hr 0.06-0.23 0.00-0.07 0.17-1.06 0.12-0.17 0.04 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS SC SC SC SC SC SC IS IS Tstms IS IS IS IS IS IS Heat index 93101104 97 87 80 95103105 97 86 96104103 96 86 Max heat 101 114 112 93 102 111 111 93 104 114 111 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 90 76 90 76 90 76 90 Temp 76 85 90 81 77 85 90 81 77 85 90 81 77 85 90 81 Dewpt 73 75 76 75 75 76 77 76 74 76 78 77 75 77 78 77 PWind dir E E E E E E E E Wind char GN BZ GN BZ GN GN GN BZ Avg clouds CL CL FW SC SC SC SC SC FW FW SC SC FW FW SC SC PoP 12hr 0 10 10 20 5 20 10 20 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS IS $$ PRZ006-182000- Central Interior- Including the cities of Aibonito, Barranquitas, Ciales, Coamo, Corozal, Jayuya, Morovis, Naranjito, Orocovis, and Villalba 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 75 86 94 63 72 77 75 84 91 63 72 77 75 86 93 Temp 73 81 85 86 82 77 75 73 73 80 83 84 81 76 75 73 74 81 85 86 81 76 Dewpt 71 72 72 72 73 73 73 72 72 74 74 74 74 73 73 72 72 74 73 71 71 71 RH 93 74 65 63 74 87 94 97 97 82 74 72 79 90 94 97 93 79 67 61 72 85 Wind dir E E E E E E E E E E SE SE SE SE SE E E E E E E E Wind spd 2 3 9 11 10 5 3 3 4 6 9 9 6 4 4 4 4 8 10 11 10 6 Wind gust 26 28 23 20 23 26 21 Clouds CL CL FW SC B1 FW CL FW FW SC FW B1 B1 SC SC SC SC FW FW SC SC CL PoP 12hr 40 5 50 20 20 QPF 12hr 0.11-0.50 0.00-0.05 0.16-1.06 0.04-0.17 0.03 Snow 12hr MM MM MM Rain shwrs IS SC IS IS IS IS SC SC IS IS IS IS IS IS IS IS Tstms IS IS Heat index 84 91 92 87 83 90 91 85 85 92 91 85 Max heat 98 109 108 88 98 109 108 88 102 108 106 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 72 86 72 85 72 85 73 86 Temp 73 80 86 77 73 80 85 77 73 80 85 77 74 81 86 77 Dewpt 71 71 70 71 72 72 71 71 72 72 73 72 72 73 74 73 PWind dir E E E E E E E E Wind char LT GN LT GN LT GN LT GN Avg clouds CL CL FW SC SC SC SC SC FW FW SC SC SC SC SC SC PoP 12hr 0 20 5 10 5 20 10 20 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS $$ PRZ007-182000- Ponce and Vicinity- Including the cities of Guayanilla, Juana Diaz, Yauco, Penuelas, Ponce, and Santa Isabel 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 75 89 94 63 75 82 75 87 94 63 76 82 75 89 94 Temp 76 84 89 89 85 80 78 76 77 83 87 87 84 80 78 77 77 84 88 89 85 80 Dewpt 70 71 72 73 75 74 73 72 72 73 75 75 75 74 73 73 72 74 74 73 73 72 RH 82 65 57 59 72 82 85 87 85 72 68 68 74 82 85 87 85 72 63 59 67 77 Wind dir NE E SE SE SE E NE NE E E SE SE SE E E E E E E SE SE E Wind spd 4 3 11 12 10 6 4 4 5 8 11 10 8 5 6 5 5 10 13 12 11 9 Wind gust 26 32 26 20 25 24 19 24 29 28 26 25 Clouds CL CL FW SC B1 FW FW FW FW SC SC B1 B1 SC SC SC SC FW FW SC SC CL PoP 12hr 40 5 40 10 10 QPF 12hr 0.08-0.58 0.00-0.07 0.15-0.99 0.03-0.08 0.02-0.10 Snow 12hr MM MM MM Rain shwrs IS SC IS IS IS IS SC SC IS IS IS IS IS IS IS IS Tstms IS IS Heat index 89 96 98 93 85 81 89 96 97 92 84 81 91 97 97 92 83 Max heat 96 109 108 92 97 109 107 92 98 108 105 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 90 76 89 76 89 76 90 Temp 76 84 90 80 77 84 89 80 77 84 89 81 77 84 90 80 Dewpt 70 71 72 72 71 71 73 73 71 72 74 74 72 73 75 75 PWind dir E E NE E E E E E Wind char LT GN LT GN LT GN LT GN Avg clouds CL CL FW FW FW FW FW SC FW FW FW SC FW FW SC SC PoP 12hr 0 5 5 10 5 20 5 30 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS SC $$ PRZ008-182000- Northwest- Including the cities of Aguadilla, Camuy, Hatillo, Isabela, and Quebradillas 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 88 94 70 74 82 84 88 94 70 74 82 84 89 94 Temp 76 83 87 88 84 79 77 75 75 82 87 88 83 78 76 75 75 83 88 89 84 79 Dewpt 72 74 75 76 76 76 76 74 73 75 77 77 77 76 75 74 73 75 77 76 76 75 RH 87 74 68 68 77 91 97 97 94 79 72 70 82 94 97 97 94 77 70 66 77 88 Wind dir E E NE NE NE E E E E E NE E SE SE SE SE E E E NE E E Wind spd 6 6 11 12 11 12 11 8 9 8 8 4 3 3 4 4 5 6 11 16 14 10 Wind gust 24 21 23 23 18 23 31 28 Clouds CL CL CL SC SC FW CL CL CL FW FW B2 B2 B1 B1 SC SC CL CL B1 B1 FW PoP 12hr 20 5 60 50 30 QPF 12hr 0.06-0.28 0 0.92-1.07 0.13 0.04-0.21 Snow 12hr MM MM MM Rain shwrs IS IS NM NM SC SC SC SC SC SC Tstms IS IS IS IS IS IS Heat index 90 97 99 93 81 90 98100 92 80 91100100 93 81 Max heat 98 112 111 91 99 111 111 92 100 114 112 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 74 88 75 88 74 88 75 88 Temp 75 83 88 79 76 83 88 79 75 83 88 79 76 83 88 79 Dewpt 72 74 75 75 73 74 76 75 73 74 77 76 74 75 77 76 PWind dir E E E E E E E E Wind char GN BZ GN BZ GN GN GN BZ Avg clouds FW FW FW SC FW FW SC B1 SC FW SC B1 SC SC SC SC PoP 12hr 0 20 5 50 10 60 5 30 Rain shwrs IS IS IS IS SC IS IS IS NM NM IS IS IS SC Tstms IS IS $$ PRZ009-182000- Western Interior- Including the cities of Adjuntas, Lares, Las Marias, Maricao, Sabana Grande, San Sebastian, and Utuado 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 75 87 94 65 72 76 75 85 94 66 72 77 75 87 94 Temp 73 81 86 87 82 77 75 73 73 80 84 85 81 76 74 73 73 81 86 87 82 76 Dewpt 70 71 72 74 74 74 73 72 71 73 75 76 75 74 73 72 71 73 74 73 73 72 RH 90 72 63 65 77 90 94 97 93 79 74 75 82 94 97 97 93 77 68 63 74 87 Wind dir E E E E NE E E E E E SE SE SE SE SE SE E E E E E E Wind spd 3 3 5 5 4 5 4 3 4 5 6 3 3 3 4 4 4 5 8 6 5 6 Wind gust 20 25 24 20 29 27 25 24 Clouds CL CL CL SC B1 FW FW FW CL FW FW B2 B2 SC SC SC SC FW FW B1 B1 CL PoP 12hr 50 5 60 20 40 QPF 12hr 0.16-0.64 0 0.16-1.07 0.04-0.13 0.03-0.23 Snow 12hr MM MM MM Rain shwrs SC SC NM NM IS IS IS IS SC SC Tstms IS IS IS IS IS IS Heat index 85 92 95 88 84 92 94 86 86 94 94 87 Max heat 97 112 110 88 99 111 111 88 100 112 109 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 71 87 72 86 72 86 72 86 Temp 72 81 87 77 73 81 86 77 73 81 86 77 73 81 86 77 Dewpt 70 71 72 72 71 71 73 73 71 72 74 74 72 73 75 74 PWind dir E E E E E E E E Wind char LT LT LT LT LT LT LT GN Avg clouds CL CL FW SC FW FW SC B1 SC FW SC B1 FW FW SC SC PoP 12hr 0 30 5 60 10 50 5 40 Rain shwrs IS IS NM IS IS IS NM NM IS IS SC SC Tstms IS IS IS IS $$ PRZ010-182000- Mayaguez and Vicinity- Including the cities of Aguada, Anasco, Hormigueros, Mayaguez, Moca, Rincon, and San German 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 78 91 94 68 75 82 76 90 94 68 75 82 78 91 94 Temp 76 85 90 91 86 80 78 76 77 84 89 90 85 80 78 76 77 85 90 91 86 80 Dewpt 72 74 76 77 77 77 76 74 73 76 78 78 78 77 76 75 73 76 78 77 77 76 RH 87 70 64 64 75 91 94 94 87 77 70 68 80 91 94 97 87 75 68 64 75 88 Wind dir E E E NW E E E E E E SE SE SE SE SE E E E E E E E Wind spd 6 6 4 5 4 9 8 5 6 6 5 5 5 5 8 6 6 6 6 8 6 10 Wind gust 17 16 17 18 23 21 18 17 19 24 24 24 21 23 24 23 20 Clouds CL CL FW SC B1 FW FW FW FW FW FW B2 B2 B1 B1 SC SC FW FW B1 B1 FW PoP 12hr 40 5 60 40 50 QPF 12hr 0.04-0.64 0 0.06-1.07 0.04-0.13 0.05-0.28 Snow 12hr MM MM MM Rain shwrs SC SC NM NM SC SC IS IS SC SC IS Tstms IS IS IS IS IS IS Heat index 93102105 97 86 94103105 97 86 95104105 97 85 Max heat 102 114 112 92 102 111 111 92 102 114 112 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 74 91 75 91 75 91 76 91 Temp 75 85 91 80 76 85 91 80 76 85 91 81 77 85 91 81 Dewpt 72 74 76 75 73 75 77 76 73 75 78 77 74 76 78 77 PWind dir E E E E E E E E Wind char GN LT LT LT LT LT LT GN Avg clouds FW FW FW SC FW FW SC B1 SC SC SC B1 SC SC FW SC PoP 12hr 5 40 5 60 20 60 20 40 Rain shwrs IS IS SC SC IS NM NM IS IS NM NM IS IS SC SC Tstms IS IS IS IS $$ PRZ011-182000- Southwest- Including the cities of Cabo Rojo, Guanica, and Lajas 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 84 93 94 73 76 82 84 92 94 73 76 82 84 93 94 Temp 76 86 92 93 87 81 79 76 77 86 91 92 87 82 79 77 78 86 92 93 87 81 Dewpt 71 73 75 77 77 77 76 74 73 75 78 78 78 77 76 75 73 75 77 77 76 76 RH 85 65 58 60 72 88 91 94 87 70 66 64 75 85 91 94 85 70 62 60 70 85 Wind dir E E SE SE E E E E E E SE SE SE E E E E E SE SE SE E Wind spd 3 3 9 10 8 8 6 5 5 11 16 14 12 10 10 11 10 12 18 16 16 17 Wind gust 21 25 19 24 31 29 26 23 24 25 23 26 35 33 33 34 Clouds CL CL FW SC SC FW FW SC FW SC SC B1 B1 SC SC SC SC SC SC SC SC FW PoP 12hr 20 10 40 10 20 QPF 12hr 0.06-0.49 0.01 0.15-0.95 0.04 0.03-0.21 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS IS SC SC IS IS IS IS IS IS IS IS IS Tstms IS IS Heat index 92102107 99 89 81 95106107100 90 83 96106106 98 88 Max heat 95 112 111 92 97 111 111 93 99 112 111 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 93 76 93 76 93 76 93 Temp 76 86 93 81 77 86 93 81 77 86 93 82 77 87 93 82 Dewpt 72 72 76 76 72 73 76 76 73 74 77 77 74 75 78 78 PWind dir E E E E E E E E Wind char GN GN LT GN GN GN GN GN Avg clouds FW FW FW SC FW FW FW SC SC SC FW SC FW FW FW SC PoP 12hr 0 10 5 20 20 20 5 30 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS SC SC $$ PRZ012-182000- Culebra- Including the city of Culebra 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 88 94 81 84 88 94 81 84 88 94 Temp 82 85 87 88 86 83 82 81 81 85 88 88 86 83 82 82 82 85 88 88 86 84 Dewpt 75 76 76 76 77 77 77 77 77 77 77 77 77 77 77 77 77 77 76 76 76 75 RH 79 75 70 68 75 82 85 88 88 77 70 70 75 82 85 85 85 77 68 68 72 74 Wind dir E E E E E E E E E SE SE SE SE E E E E E E E E E Wind spd 12 17 16 13 13 16 16 18 18 16 11 12 11 13 14 17 20 20 18 16 17 18 Clouds SC SC SC SC SC SC SC OV B2 B2 OV B1 B1 B2 B2 SC SC SC SC SC SC CL PoP 12hr 30 70 70 60 10 QPF 12hr 0.17 0.55 0.47 0.12 0.05 Snow 12hr MM MM MM Rain shwrs IS IS SC IS IS IS IS NM NM NM NM SC SC NM NM IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS IS Heat index 88 95 98 99 96 92 90 87 88 96100100 97 92 91 89 89 96 99 99 96 91 Max heat 101 107 106 96 102 109 108 97 102 107 106 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 81 88 81 88 81 88 81 88 Temp 82 85 88 83 81 85 88 83 82 85 88 84 82 85 88 84 Dewpt 75 76 76 76 76 76 76 76 76 77 77 77 77 77 77 77 PWind dir E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds CL FW SC SC B1 B1 SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 40 40 30 30 30 30 30 Rain shwrs IS IS SC SC SC SC SC IS SC SC SC SC SC SC IS $$ PRZ013-182000- Vieques- Including the city of Vieques 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 84 89 92 80 84 89 92 81 84 89 92 Temp 81 86 88 89 86 83 82 81 81 85 88 89 86 83 82 81 82 86 88 89 86 84 Dewpt 74 75 74 74 75 75 76 76 75 76 75 75 75 75 76 76 76 76 74 74 74 74 RH 79 70 63 61 70 77 82 85 82 75 66 64 70 77 82 85 82 72 63 61 68 72 Wind dir E E E E E E E E E SE SE SE SE E E E E E E E E E Wind spd 13 17 16 13 14 17 16 17 17 14 11 12 11 12 14 17 19 19 17 14 17 19 Clouds SC SC SC SC SC SC SC OV B2 B2 OV B1 B1 B2 B2 SC SC SC SC SC SC CL PoP 12hr 30 70 70 60 30 QPF 12hr 0.15 0.59 0.50 0.11-0.25 0.03-0.20 Snow 12hr MM MM MM Rain shwrs IS IS SC IS IS IS IS NM NM NM NM SC SC NM NM SC SC SC SC IS IS Tstms IS IS IS IS IS IS IS IS IS IS Heat index 87 94 97 98 95 90 89 86 87 95 98 98 96 91 90 88 88 95 97 97 95 90 Max heat 99 103 102 92 99 103 103 93 100 103 101 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 89 80 89 81 89 81 89 Temp 81 86 89 83 81 86 89 83 81 86 89 84 81 86 89 83 Dewpt 74 74 73 74 74 75 74 74 75 75 75 75 75 76 75 76 PWind dir E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds CL FW SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 10 30 30 20 30 30 30 30 Rain shwrs IS IS SC SC SC IS IS IS SC SC SC SC SC SC IS $$ VIZ001-182000- St.Thomas...St. John...and Adjacent Islands- Including the cities of Anna`s Retreat, Charlotte Amalie, Charlotte Amalie East, Charlotte Amalie West, and Cruz Bay 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 87 94 73 80 82 84 87 94 74 80 82 84 87 94 Temp 81 84 87 87 85 82 81 80 80 84 87 87 85 83 82 80 81 84 87 87 85 83 Dewpt 75 75 75 75 75 76 76 76 76 76 75 75 75 76 76 76 76 76 74 74 74 74 RH 82 74 68 68 72 82 85 88 88 77 68 68 72 80 82 88 85 77 65 65 70 74 Wind dir E E E E E E E E E SE SE SE SE E E E E E E E E E Wind spd 14 17 16 13 14 16 17 18 17 16 12 11 12 14 16 17 21 20 18 16 17 19 Clouds SC SC SC SC SC SC SC OV B2 B2 B2 SC SC B1 B1 SC SC CL CL SC SC CL PoP 12hr 30 70 70 50 10 QPF 12hr 0.18-0.25 0.60 0.37-0.43 0.08 0.02 Snow 12hr MM MM MM Rain shwrs IS IS SC IS SC IS SC NM NM NM NM SC SC SC SC IS IS IS IS Tstms IS IS IS IS IS IS Heat index 86 93 95 96 93 89 87 85 86 93 96 96 94 90 88 87 87 93 95 95 93 89 Max heat 101 106 105 95 102 107 106 96 102 105 104 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 80 87 80 87 80 87 81 87 Temp 81 84 87 82 80 84 87 83 80 84 87 83 81 85 87 83 Dewpt 74 75 74 75 75 75 74 75 75 76 75 76 76 76 75 76 PWind dir E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds CL FW SC SC B1 B1 SC SC SC SC SC SC SC SC SC FW PoP 12hr 20 40 40 20 30 30 20 20 Rain shwrs IS IS SC SC SC IS IS IS SC SC IS IS IS IS IS $$ VIZ002-182000- St Croix- Including the cities of Christiansted, Frederiksted, Frederiksted Southeast, and Grove Place 231 AM AST Tue Aug 18 2026 Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26 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 84 88 94 80 84 88 94 80 84 88 94 Temp 81 85 87 88 85 82 81 80 80 85 88 88 86 83 82 81 81 85 88 88 86 83 Dewpt 76 76 76 76 76 77 77 77 76 76 76 76 76 77 77 77 76 76 75 75 75 75 RH 85 75 70 68 75 85 88 91 88 75 68 68 72 82 85 88 85 75 66 66 70 77 Wind dir E E E E E E E E E SE SE SE E E E E E E E E E E Wind spd 14 16 17 14 16 14 14 14 13 13 12 12 11 12 13 16 18 20 18 16 18 17 Clouds SC CL SC SC SC B1 B2 B2 B2 B2 B2 SC SC B1 B1 SC SC CL CL SC SC CL PoP 12hr 40 60 50 40 10 QPF 12hr 0.26 0.65 0.32-0.39 0.06 0.01 Snow 12hr MM MM MM Rain shwrs IS SC SC SC SC SC NM NM SC SC SC SC SC SC IS IS IS IS Tstms IS IS IS IS IS IS Heat index 87 94 98 99 96 91 89 85 86 95 99100 96 91 90 87 87 94 98 98 94 90 Max heat 102 110 109 95 102 110 109 95 102 109 106 Heat Y Y Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 80 88 80 88 80 88 81 88 Temp 81 85 88 83 81 85 88 83 81 85 88 83 81 85 88 83 Dewpt 75 75 75 75 75 75 75 75 76 76 76 77 76 77 76 77 PWind dir E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds CL FW SC SC SC SC SC SC FW FW FW SC SC SC FW FW PoP 12hr 10 30 30 20 5 20 20 10 Rain shwrs IS IS SC SC SC IS IS IS IS IS IS IS IS $$