Area Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
188 FOCA52 TJSJ 181831 AFMSJU Area Forecast Matrices National Weather Service San Juan PR 231 PM AST Tue Aug 18 2026 PRZ001-190800- San Juan and Vicinity- Including the cities of Bayamon, Carolina, Catano, Guaynabo, San Juan, Toa Alta, Toa Baja, and Trujillo Alto 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 73 78 82 83 90 93 73 78 82 84 91 93 72 78 82 Temp 86 82 80 78 79 85 89 90 86 82 80 79 79 86 90 91 87 82 80 79 79 85 Dewpt 77 77 76 76 76 77 77 78 77 77 77 76 76 77 76 75 75 75 75 74 75 75 RH 75 85 88 94 91 77 68 68 75 85 91 91 91 75 64 60 68 79 85 85 88 72 Wind dir E E E E SE SE SE SE SE SE SE SE E E E E E E E E E E Wind spd 13 9 6 5 5 8 11 14 12 8 8 8 9 11 13 16 14 10 8 9 11 13 Wind gust 25 25 Clouds B1 SC FW SC SC B1 B1 SC B1 B1 B1 SC SC FW FW SC SC CL CL FW FW FW PoP 12hr 40 50 50 30 5 QPF 12hr 0.02-0.36 0.17-0.37 0.08 0.04 0.01 Snow 12hr MM MM MM Rain shwrs SC IS IS IS SC SC SC SC SC SC SC SC IS IS SC SC IS IS Tstms IS IS IS IS Heat index 97 89 85 80 82 96102104 98 89 85 81 82 97102102 96 88 84 80 82 94 Max heat 111 93 102 111 110 94 103 112 109 93 99 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 78 90 78 90 78 90 78 90 Temp 90 82 79 85 90 82 79 85 90 82 79 86 90 82 79 85 90 82 Dewpt 75 75 75 76 76 75 75 76 77 76 76 77 78 77 76 77 72 74 PWind dir E E E E E E E E E Wind char GN LT GN LT GN GN GN LT GN Avg clouds FW SC SC SC SC SC SC SC SC B1 SC SC SC SC FW SC SC B1 PoP 12hr 30 30 30 20 40 30 30 10 50 Rain shwrs IS IS SC SC SC IS IS IS SC SC IS IS IS IS IS IS SC SC $$ PRZ002-190800- Northeast- Including the cities of Ceiba, Canovanas, Fajardo, Humacao, Loiza, Luquillo, Naguabo, and Rio Grande 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 66 77 82 75 88 94 67 78 82 75 88 94 67 78 82 Temp 85 81 79 78 78 84 87 88 85 81 80 79 79 84 87 88 85 81 80 79 79 84 Dewpt 75 75 75 75 75 75 75 76 75 75 75 75 75 75 74 74 73 73 73 73 73 73 RH 72 82 88 91 91 74 68 68 72 82 85 88 88 74 65 63 67 77 79 82 82 70 Wind dir E E E E E SE SE SE SE SE E E E E E E E E E E E E Wind spd 12 10 9 9 9 9 11 11 11 9 9 11 13 13 12 14 13 12 11 11 11 13 Wind gust 19 19 19 23 21 25 24 23 21 Clouds SC SC SC B2 B2 B2 B2 B1 B1 B2 B1 SC SC FW FW SC SC CL CL SC SC SC PoP 12hr 60 70 60 20 5 QPF 12hr 0.28-0.54 0.34-0.49 0.08 0.04 0.02 Snow 12hr MM MM MM Rain shwrs IS IS IS NM SC NM NM SC SC NM SC SC SC IS IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS IS Heat index 93 86 84 80 81 92 97 98 93 87 85 82 83 92 96 97 92 87 84 81 82 91 Max heat 104 93 99 106 105 94 99 105 104 92 97 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 77 88 78 88 78 88 78 88 Temp 88 81 78 84 88 81 78 84 88 81 79 84 88 81 79 84 88 81 Dewpt 74 74 74 74 74 74 74 74 75 75 74 75 76 75 75 75 74 74 PWind dir E E E E E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds SC SC B1 B1 SC SC SC SC B1 B1 SC SC SC SC SC SC SC B1 PoP 12hr 30 30 30 30 40 30 30 20 40 Rain shwrs IS SC SC SC SC IS IS SC SC SC SC SC SC IS IS IS IS SC $$ PRZ003-190800- Southeast- Including the cities of Arroyo, Guayama, Maunabo, Patillas, Salinas, and Yabucoa 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 69 77 82 78 87 94 69 77 82 79 88 94 69 77 83 Temp 85 81 79 78 78 83 87 87 84 81 79 78 79 84 87 88 85 81 79 78 78 84 Dewpt 75 75 75 75 75 76 76 76 76 76 76 75 75 76 75 74 74 73 73 73 73 74 RH 72 82 88 91 91 80 70 70 77 85 91 91 88 77 68 63 70 77 82 85 85 72 Wind dir E NE NE NE E E SE SE SE E E E E E E E E E E E E E Wind spd 13 9 8 8 8 9 11 10 9 6 9 9 11 12 12 13 13 11 10 10 12 14 Wind gust 27 19 21 23 19 23 25 25 26 26 23 21 21 25 28 Clouds SC SC SC B1 B1 B1 B1 B1 B1 SC SC SC SC FW FW FW FW CL CL FW FW FW PoP 12hr 40 50 40 10 5 QPF 12hr 0.05-0.50 0.21-0.47 0.06 0.02 0.01 Snow 12hr MM MM MM Rain shwrs IS IS IS SC SC SC SC SC SC IS IS SC SC IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS Heat index 94 87 83 80 81 92 98 99 94 87 84 81 82 93 98 98 92 86 83 80 81 92 Max heat 108 93 100 109 108 94 103 109 107 92 100 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 77 89 77 89 78 89 78 88 Temp 89 81 78 84 89 81 78 84 89 81 79 85 89 81 78 84 88 81 Dewpt 73 73 74 74 74 74 74 75 75 75 75 75 76 75 75 76 71 73 PWind dir E NE E NE E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds FW SC SC SC SC FW FW FW SC SC SC SC SC FW FW FW SC B1 PoP 12hr 20 20 20 20 20 30 30 5 50 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS IS IS IS SC SC $$ PRZ004-190800- Eastern Interior- Including the cities of Aguas Buenas, Caguas, Cayey, Cidra, Comerio, Gurabo, Juncos, Las Piedras, and San Lorenzo 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 69 74 78 77 87 93 69 75 78 77 87 93 69 74 78 Temp 84 79 77 75 75 82 86 87 83 79 77 76 76 82 86 87 83 79 77 75 75 82 Dewpt 74 74 74 74 74 75 75 75 75 74 74 74 74 75 74 73 72 72 72 72 72 73 RH 72 85 90 97 97 79 70 68 77 85 90 94 94 79 68 63 70 79 85 90 90 74 Wind dir E E E E E SE SE SE SE SE E E E E E E E E E E E E Wind spd 11 5 4 4 4 6 10 11 10 5 6 6 9 11 11 13 12 8 5 8 10 12 Clouds SC SC FW SC SC B1 B1 B1 B1 B1 SC SC SC FW FW SC SC CL CL FW FW FW PoP 12hr 40 40 40 20 5 QPF 12hr 0.03-0.45 0.18-0.43 0.03-0.09 0.03 0.01 Snow 12hr MM MM MM Rain shwrs IS IS IS IS SC SC SC SC SC SC SC SC SC IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS Heat index 91 82 88 95 96 90 81 90 95 95 89 81 88 Max heat 106 90 101 109 108 90 101 107 105 89 98 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 87 74 87 74 87 75 88 75 87 Temp 87 79 75 82 87 79 75 82 87 79 76 83 88 79 76 83 87 79 Dewpt 72 73 72 74 72 73 73 74 74 74 73 75 75 74 74 75 69 72 PWind dir E E E E E E E E E Wind char GN LT GN LT GN LT GN LT GN Avg clouds FW SC SC SC SC SC FW SC SC SC SC SC SC SC FW FW SC B1 PoP 12hr 30 30 30 20 30 30 30 5 60 Rain shwrs SC SC IS IS IS IS IS IS IS SC IS IS IS IS IS IS IS SC Tstms IS $$ PRZ005-190800- North Central- Including the cities of Arecibo, Barceloneta, Dorado, Florida, Manati, Vega Alta, and Vega Baja 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 73 76 82 84 89 94 73 75 82 84 91 94 72 75 82 Temp 85 80 78 77 77 84 89 89 85 80 78 76 77 85 90 91 86 81 78 76 77 85 Dewpt 77 77 76 75 75 77 78 79 78 77 76 75 75 77 77 76 76 75 74 73 74 75 RH 77 91 94 94 94 80 70 73 80 91 94 97 94 77 66 62 72 82 88 90 90 72 Wind dir NE E E E SE E E E E SE SE SE SE E E E E E E E E E Wind spd 13 11 8 5 5 6 10 13 6 6 8 6 5 10 12 17 18 12 9 8 9 12 Wind gust 26 20 32 33 25 Clouds SC FW CL CL FW SC FW B1 B1 B1 SC SC FW FW FW SC SC CL CL FW FW CL PoP 12hr 5 50 40 20 0 QPF 12hr 0.00-0.07 0.17-1.06 0.07 0.04 0.01 Snow 12hr MM MM MM Rain shwrs SC IS IS IS IS SC SC SC IS SC IS IS Tstms IS IS IS Heat index 97 87 80 95103105 97 86 96104103 96 86 80 93 Max heat 112 93 102 111 111 93 104 114 111 91 100 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 76 90 76 90 76 90 76 90 Temp 90 81 77 85 90 81 77 85 90 81 77 85 90 81 77 85 90 81 Dewpt 76 75 75 76 77 76 74 76 78 77 75 77 78 77 76 78 72 74 PWind dir E E E E E E E E E Wind char BZ GN GN GN GN GN GN LT GN Avg clouds FW SC SC SC SC SC FW FW SC SC FW FW SC SC FW FW SC B1 PoP 12hr 10 10 20 5 20 10 20 10 50 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS IS IS SC SC $$ PRZ006-190800- Central Interior- Including the cities of Aibonito, Barranquitas, Ciales, Coamo, Corozal, Jayuya, Morovis, Naranjito, Orocovis, and Villalba 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 63 72 77 75 84 91 63 72 77 75 86 93 62 72 77 Temp 82 77 75 73 73 80 83 84 81 76 75 73 74 81 85 86 81 76 74 73 73 80 Dewpt 73 73 73 72 72 74 74 74 74 73 73 72 72 74 73 71 71 71 71 71 71 71 RH 74 87 94 97 97 82 74 72 79 90 94 97 93 79 67 61 72 85 90 93 93 74 Wind dir E E E E E E SE SE SE SE SE E E E E E E E E E E E Wind spd 10 5 3 3 4 5 9 10 8 4 5 4 5 9 10 11 11 6 4 6 9 11 Wind gust 25 20 23 21 24 25 24 20 26 Clouds B1 FW CL FW FW SC FW B1 B1 SC SC SC FW CL CL SC SC CL CL FW FW CL PoP 12hr 5 50 20 20 0 QPF 12hr 0.00-0.05 0.16-1.06 0.02-0.07 0.02 0 Snow 12hr MM MM MM Rain shwrs SC IS IS IS IS SC SC IS IS IS IS IS IS Tstms IS IS Heat index 87 83 90 91 85 85 92 91 85 84 Max heat 108 88 98 109 108 88 102 108 106 86 97 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 86 72 85 72 85 73 86 73 85 Temp 86 77 73 80 85 77 73 80 85 77 74 81 86 77 74 80 85 77 Dewpt 70 71 72 72 71 71 72 72 73 72 72 73 74 73 73 74 67 71 PWind dir E E E E E E E E E Wind char GN LT GN LT GN LT GN LT GN Avg clouds FW SC SC SC SC SC FW FW SC SC SC SC SC SC FW FW SC B1 PoP 12hr 20 5 10 5 20 10 20 5 60 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS IS IS IS SC Tstms IS IS $$ PRZ007-190800- Ponce and Vicinity- Including the cities of Guayanilla, Juana Diaz, Yauco, Penuelas, Ponce, and Santa Isabel 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 63 75 82 75 87 94 63 76 82 75 89 94 62 75 82 Temp 85 80 78 76 77 83 87 87 84 80 78 77 77 84 88 89 85 80 78 76 77 84 Dewpt 75 74 73 72 72 73 75 75 75 74 73 73 72 74 74 73 73 72 71 70 70 71 RH 72 82 85 87 85 72 68 68 74 82 85 87 85 72 63 59 67 77 79 82 79 65 Wind dir SE E NE NE E E SE SE SE E E E E E E SE SE E E E E E Wind spd 10 8 4 4 4 8 10 10 8 5 6 5 8 11 13 12 12 10 6 6 9 11 Wind gust 29 20 24 25 19 20 26 28 27 26 25 21 26 Clouds B1 FW FW FW FW SC SC B1 B1 SC CL FW FW FW FW SC SC CL CL FW FW CL PoP 12hr 5 40 10 10 0 QPF 12hr 0.00-0.07 0.15-0.99 0.02 0.00-0.10 0.01 Snow 12hr MM MM MM Rain shwrs SC IS IS IS IS SC SC IS IS IS IS IS Tstms IS IS Heat index 93 85 81 89 96 97 92 84 81 91 97 97 92 83 80 89 Max heat 108 92 97 109 107 92 98 108 105 90 96 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 76 89 76 89 76 90 76 88 Temp 90 80 77 84 89 80 77 84 89 81 77 84 90 80 77 84 88 80 Dewpt 72 72 71 71 73 73 71 72 74 74 72 73 75 75 73 74 71 72 PWind dir E NE E E E E E E E Wind char GN LT GN LT GN LT GN LT GN Avg clouds FW FW FW FW FW SC FW FW FW SC FW FW SC SC CL FW SC B1 PoP 12hr 5 5 10 5 20 5 30 0 60 Rain shwrs IS IS IS IS IS IS IS IS IS IS IS SC NM NM Tstms IS IS $$ PRZ008-190800- Northwest- Including the cities of Aguadilla, Camuy, Hatillo, Isabela, and Quebradillas 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 70 74 82 84 88 94 70 74 82 84 89 94 70 74 82 Temp 84 79 77 75 75 82 87 88 83 78 76 75 75 83 88 89 84 79 77 75 75 83 Dewpt 76 76 76 74 73 75 77 77 77 76 75 74 73 75 77 76 76 75 73 72 72 74 RH 77 91 97 97 94 79 72 70 82 94 97 97 94 77 70 66 77 88 87 90 90 74 Wind dir NE E E E E E NE NE E SE SE SE SE E E NE E E E E E E Wind spd 12 11 11 8 6 6 6 8 2 3 5 5 4 8 10 16 16 14 10 9 9 11 Wind gust 21 18 18 20 21 32 32 26 21 19 Clouds B1 FW CL CL CL FW FW B2 B2 B1 SC SC CL CL CL B1 B1 CL CL FW FW CL PoP 12hr 5 60 50 30 0 QPF 12hr 0 0.92-1.07 0.07 0.04-0.21 0.01 Snow 12hr MM MM MM Rain shwrs SC NM NM SC IS SC SC SC Tstms IS IS IS IS IS Heat index 93 81 90 98100 92 80 91100100 93 81 89 Max heat 111 91 99 111 111 92 100 114 112 90 96 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 75 88 74 88 75 88 75 88 Temp 88 79 76 83 88 79 75 83 88 79 76 83 88 79 76 83 88 79 Dewpt 75 75 73 74 76 75 73 74 77 76 74 75 77 76 74 76 73 75 PWind dir NE E E E E E E E E Wind char BZ GN BZ GN GN GN GN LT GN Avg clouds FW SC FW FW SC B1 SC FW SC B1 SC SC SC SC FW FW SC B1 PoP 12hr 20 5 50 10 60 5 30 10 50 Rain shwrs IS IS IS IS SC IS IS IS NM NM IS IS IS SC IS IS SC Tstms IS IS $$ PRZ009-190800- Western Interior- Including the cities of Adjuntas, Lares, Las Marias, Maricao, Sabana Grande, San Sebastian, and Utuado 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 65 72 76 75 85 94 66 72 77 75 87 94 65 71 76 Temp 82 77 75 73 73 80 84 85 81 76 74 73 73 81 86 87 82 76 74 72 73 81 Dewpt 74 74 73 72 71 73 75 76 75 74 73 72 71 73 74 73 73 72 71 70 70 71 RH 77 90 94 97 93 79 74 75 82 94 97 97 93 77 68 63 74 87 90 93 90 72 Wind dir NE E E E E E SE SE SE SE SE E E E E E E E E E E E Wind spd 5 6 4 3 3 4 5 4 3 3 4 4 4 5 8 6 5 6 5 5 5 6 Wind gust 24 23 24 28 25 21 24 21 Clouds B1 FW FW FW CL FW FW B2 B2 SC FW SC FW CL CL B1 B1 CL CL FW FW CL PoP 12hr 5 60 20 40 0 QPF 12hr 0 0.16-1.07 0.02-0.08 0.03-0.23 0 Snow 12hr MM MM MM Rain shwrs SC NM NM IS IS IS SC SC Tstms IS IS IS IS IS Heat index 88 84 92 94 86 86 94 94 87 85 Max heat 110 88 99 111 111 88 100 112 109 87 96 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 87 72 86 72 86 72 86 72 86 Temp 87 77 73 81 86 77 73 81 86 77 73 81 86 77 73 81 86 77 Dewpt 72 72 71 71 73 73 71 72 74 74 72 73 75 74 72 74 69 72 PWind dir E E E E E E E E E Wind char GN LT LT LT LT LT LT LT LT Avg clouds FW SC FW FW SC B1 SC FW SC B1 FW FW SC SC FW FW SC B1 PoP 12hr 30 5 60 10 50 5 40 5 50 Rain shwrs IS IS NM IS IS IS NM NM IS IS SC SC IS SC Tstms IS IS IS IS IS $$ PRZ010-190800- Mayaguez and Vicinity- Including the cities of Aguada, Anasco, Hormigueros, Mayaguez, Moca, Rincon, and San German 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 68 75 82 76 90 94 68 75 82 78 91 94 68 74 82 Temp 86 80 78 76 77 84 89 90 85 80 78 76 77 85 90 91 86 80 77 75 76 85 Dewpt 77 77 76 74 73 76 78 78 78 77 76 75 73 76 78 77 77 76 74 72 73 74 RH 75 91 94 94 87 77 70 68 80 91 94 97 87 75 68 64 75 88 90 90 90 70 Wind dir NE E E E E E SE E E E E E E E E E E E E E E E Wind spd 8 10 9 6 4 5 5 5 5 3 6 6 5 8 8 8 8 9 8 8 8 6 Wind gust 24 24 23 18 17 17 18 18 23 23 25 26 20 21 20 24 23 21 19 Clouds B1 FW FW FW FW FW FW B2 B2 B1 SC SC FW FW FW B1 B1 FW FW FW FW CL PoP 12hr 5 60 40 50 5 QPF 12hr 0 0.06-1.07 0.02-0.08 0.05-0.28 0.01 Snow 12hr MM MM MM Rain shwrs SC NM NM SC IS IS SC SC IS IS Tstms IS IS IS IS IS Heat index 97 86 94103105 97 86 95104105 97 85 92 Max heat 112 92 102 111 111 92 102 114 112 91 101 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 91 75 91 75 91 76 91 76 91 Temp 91 80 76 85 91 80 76 85 91 81 77 85 91 81 77 85 91 81 Dewpt 76 75 73 75 77 76 73 75 78 77 74 76 78 77 75 77 73 74 PWind dir E E E E E E E E E Wind char LT GN GN GN GN LT GN LT LT Avg clouds FW SC FW FW SC B1 SC SC SC B1 SC SC FW SC FW FW SC SC PoP 12hr 40 5 60 20 60 20 40 5 30 Rain shwrs SC SC IS NM NM IS IS NM NM IS IS SC SC IS IS IS SC Tstms IS IS IS IS $$ PRZ011-190800- Southwest- Including the cities of Cabo Rojo, Guanica, and Lajas 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 73 76 82 84 92 94 73 76 82 84 93 94 72 76 82 Temp 87 81 79 76 77 86 91 92 87 82 79 77 78 86 92 93 87 81 79 76 77 86 Dewpt 77 77 76 74 73 75 78 78 78 77 76 75 73 75 77 77 76 76 73 72 72 72 RH 72 88 91 94 87 70 66 64 75 85 91 94 85 70 62 60 70 85 82 87 85 63 Wind dir SE E E E E E SE SE SE E E E E E E SE SE E E E E E Wind spd 8 9 4 4 5 8 14 14 11 10 11 11 10 16 17 16 12 16 11 9 10 12 Wind gust 21 28 31 23 20 24 26 23 32 34 34 27 32 27 23 21 25 Clouds SC FW FW SC FW SC SC B1 B1 SC FW FW FW FW FW SC SC FW FW FW FW CL PoP 12hr 10 40 10 20 0 QPF 12hr 0.01 0.15-0.95 0.02 0.01-0.20 0.01 Snow 12hr MM MM MM Rain shwrs IS IS IS IS IS IS SC SC IS IS IS IS IS IS IS IS Tstms IS IS Heat index 99 89 81 95106107100 90 83 96106106 98 88 81 93 Max heat 111 92 97 111 111 93 99 112 111 90 95 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 93 76 93 76 93 76 93 76 92 Temp 93 81 77 86 93 81 77 86 93 82 77 87 93 82 77 86 92 81 Dewpt 76 76 72 73 76 76 73 74 77 77 74 75 78 78 74 76 73 74 PWind dir SE E E E E E E E E Wind char GN GN GN GN BZ GN BZ GN GN Avg clouds FW SC FW FW FW SC SC SC FW SC FW FW FW SC FW FW FW SC PoP 12hr 10 5 20 20 20 5 30 5 50 Rain shwrs IS IS IS IS IS IS IS IS IS IS SC SC IS IS SC SC $$ PRZ012-190800- Culebra- Including the city of Culebra 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 81 84 88 94 81 84 88 94 81 Temp 86 83 82 81 81 85 88 88 86 83 82 82 82 85 88 88 86 84 82 82 82 85 Dewpt 77 77 77 77 77 77 77 77 77 77 77 77 77 77 76 76 76 75 75 75 75 76 RH 75 82 85 88 88 77 70 70 75 82 85 85 85 77 68 68 72 74 79 79 79 75 Wind dir E E E E E SE SE SE SE E E E E E E E E E E E E E Wind spd 14 17 17 16 17 16 13 13 14 14 17 21 20 19 17 18 18 19 18 16 16 16 Clouds SC SC SC OV B2 B2 OV B1 B1 B2 B1 SC SC FW FW SC SC CL CL SC SC SC PoP 12hr 70 70 60 10 20 QPF 12hr 0.55 0.47 0.07 0.03 0.03 Snow 12hr MM MM MM Rain shwrs IS IS IS NM NM NM NM SC SC NM SC IS IS IS IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS IS Heat index 96 92 90 87 88 96100100 97 92 91 89 89 96 99 99 96 91 90 88 89 95 Max heat 106 96 102 109 108 97 102 107 106 96 100 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 81 88 81 88 81 88 81 88 Temp 88 83 81 85 88 83 82 85 88 84 82 85 88 84 82 85 88 83 Dewpt 76 76 76 76 76 76 76 77 77 77 77 77 77 77 77 77 75 75 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 40 40 30 30 30 30 30 30 30 Rain shwrs IS SC SC SC SC SC IS SC SC SC SC SC SC IS IS SC SC SC $$ PRZ013-190800- Vieques- Including the city of Vieques 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 84 89 92 81 84 89 92 81 Temp 86 83 82 81 81 85 88 89 86 83 82 81 82 86 88 89 86 84 82 81 82 86 Dewpt 75 75 76 76 75 76 75 75 75 75 76 76 76 76 74 74 74 74 74 74 74 74 RH 70 77 82 85 82 75 66 64 70 77 82 85 82 72 63 61 68 72 77 79 77 68 Wind dir E E E E E SE SE SE SE E E E E E E E E E E E E E Wind spd 14 16 16 16 16 16 12 11 13 14 14 20 20 19 16 18 18 19 19 17 17 17 Clouds SC SC SC OV B2 B2 OV B1 B1 B2 B2 SC SC FW FW SC SC CL CL FW FW SC PoP 12hr 70 70 60 10 10 QPF 12hr 0.59 0.50 0.08 0.03 0.03 Snow 12hr MM MM MM Rain shwrs IS IS IS NM NM NM NM SC SC NM SC SC SC IS IS IS IS IS IS IS Tstms IS IS IS IS IS IS IS IS Heat index 95 90 89 86 87 95 98 98 96 91 90 88 88 95 97 97 95 90 89 87 88 94 Max heat 102 92 99 103 103 93 100 103 101 92 98 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 80 89 81 89 81 89 81 89 Temp 89 83 81 86 89 83 81 86 89 84 81 86 89 83 81 86 89 83 Dewpt 73 74 74 75 74 74 75 75 75 75 75 76 75 76 76 76 75 75 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 20 30 30 30 30 20 20 Rain shwrs IS SC SC SC IS IS IS SC SC SC SC SC SC IS IS IS IS IS $$ VIZ001-190800- St.Thomas...St. John...and Adjacent Islands- Including the cities of Anna`s Retreat, Charlotte Amalie, Charlotte Amalie East, Charlotte Amalie West, and Cruz Bay 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 73 80 82 84 87 94 74 80 82 84 87 94 75 80 82 Temp 85 82 81 80 80 84 87 87 85 83 82 80 81 84 87 87 85 83 82 81 81 84 Dewpt 75 76 76 76 76 76 75 75 75 76 76 76 76 76 74 74 74 74 74 74 75 75 RH 72 82 85 88 88 77 68 68 72 80 82 88 85 77 65 65 70 74 77 79 82 74 Wind dir E E E E E SE SE SE SE E E E E E E E E E E E E E Wind spd 13 16 16 16 17 16 14 13 14 13 18 20 21 20 18 18 19 19 19 18 18 18 Clouds SC SC SC OV B2 B2 B2 SC B1 B1 B1 SC CL FW FW SC SC CL CL FW FW SC PoP 12hr 70 70 50 10 20 QPF 12hr 0.60 0.37-0.43 0.05 0.02 0.03 Snow 12hr MM MM MM Rain shwrs SC IS SC NM NM NM NM SC SC SC SC IS IS IS IS IS IS IS IS Tstms IS IS IS IS IS IS Heat index 93 89 87 85 86 93 96 96 94 90 88 87 87 93 95 95 93 89 88 86 87 93 Max heat 105 95 102 107 106 96 102 105 104 94 100 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 87 80 87 80 87 81 87 80 87 Temp 87 82 80 84 87 83 80 84 87 83 81 85 87 83 81 84 87 83 Dewpt 74 75 75 75 74 75 75 76 75 76 76 76 75 76 76 76 74 74 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC B1 B1 SC SC SC SC SC SC SC SC SC FW SC SC B1 B1 PoP 12hr 40 40 20 30 30 20 20 30 30 Rain shwrs IS SC SC SC IS IS IS SC SC IS IS IS IS IS IS SC SC SC $$ VIZ002-190800- St Croix- Including the cities of Christiansted, Frederiksted, Frederiksted Southeast, and Grove Place 231 PM AST Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri 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 84 88 94 80 84 88 94 77 80 83 Temp 85 82 81 80 80 85 88 88 86 83 82 81 81 85 88 88 86 83 82 81 81 85 Dewpt 76 77 77 77 76 76 76 76 76 77 77 77 76 76 75 75 75 75 75 75 75 75 RH 75 85 88 91 88 75 68 68 72 82 85 88 85 75 66 66 70 77 79 82 82 72 Wind dir E E E E E SE SE SE E E E E E E E E E E E E E E Wind spd 13 13 13 13 12 13 14 14 13 11 17 18 18 19 19 18 18 18 18 17 17 18 Wind gust 27 Clouds B1 B1 B2 B2 B2 B2 B2 SC SC B1 SC FW CL FW FW SC SC CL CL FW FW SC PoP 12hr 60 50 40 10 10 QPF 12hr 0.65 0.32-0.39 0.04 0.02 0.02 Snow 12hr MM MM MM Rain shwrs SC SC SC NM NM SC SC SC SC SC SC IS IS IS IS IS IS Tstms IS IS IS IS IS Heat index 96 91 89 85 86 95 99100 96 91 90 87 87 94 98 98 94 90 88 87 87 94 Max heat 109 95 102 110 109 95 102 109 106 93 101 Date 08/21 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 80 88 80 88 81 88 80 88 Temp 88 83 81 85 88 83 81 85 88 83 81 85 88 83 81 85 88 83 Dewpt 75 75 75 75 75 75 76 76 76 77 76 77 76 77 77 76 74 75 PWind dir E E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC FW FW FW SC SC SC FW FW SC SC SC SC PoP 12hr 30 30 20 5 20 20 10 30 30 Rain shwrs IS SC SC SC IS IS IS IS IS IS IS IS IS SC SC IS $$