Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
1
2
698 FOCA52 TJSJ 211832 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 PM AST Fri Aug 21 2026 PRZ001-220800- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 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 79 92 80 93 81 Temp 87 83 81 80 80 87 91 92 88 84 82 81 81 88 92 93 89 85 83 82 82 88 Dewpt 74 75 75 75 75 75 74 74 74 75 75 75 75 75 74 75 75 76 76 75 75 76 RH 65 77 82 85 85 68 58 56 63 74 79 82 82 66 56 56 64 75 80 79 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 14 11 11 11 8 8 11 17 14 9 10 9 10 10 13 16 14 10 10 9 10 9 Clouds FW SC SC SC SC FW SC SC SC SC SC SC SC SC SC FW FW B1 B1 B1 B1 SC PoP 12hr 30 30 40 40 40 QPF 12hr 0.06 0.07 0.09 0.09 0.08 Rain shwrs C C S S S C S C C C C C C C S S C C C C S Obvis H Heat index 96 90 87 84 85 97101102 97 92 89 86 87 97102105100 94 92 88 89 99 Max heat 100 89 97 102 101 91 97 105 104 93 99 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 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 81 93 80 93 81 92 80 90 Temp 93 85 82 88 93 84 81 88 93 85 82 88 92 84 81 86 90 84 Dewpt 76 77 76 76 77 77 76 76 76 76 76 76 76 76 75 75 73 75 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 SC SC B1 B1 B2 B2 B1 SC B1 B1 SC FW CL FW SC SC PoP 12hr 30 30 50 50 50 40 20 10 30 Rain shwrs C C S C C L L L C C C C S S S C C Tstms S S S S $$ PRZ002-220800- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 81 90 82 90 82 Temp 86 83 82 81 82 87 89 90 88 85 84 82 83 87 90 90 88 85 84 82 83 87 Dewpt 75 75 75 75 75 75 75 75 75 75 75 75 74 75 75 76 76 76 76 76 76 76 RH 70 77 79 82 79 68 64 62 66 72 74 79 74 68 62 64 68 75 77 82 80 70 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 14 12 12 12 10 10 11 12 11 9 11 11 11 12 13 13 12 11 12 11 12 11 Clouds FW SC SC SC SC FW SC SC B2 B1 SC B1 B2 SC SC FW FW B1 B1 B1 B1 SC PoP 12hr 30 50 50 40 40 QPF 12hr 0.09 0.10 0.12 0.11 0.07 Rain shwrs C S S C S C S C C C C C C C S S C C C C S Tstms S Obvis H Heat index 95 91 89 87 88 96100101 97 93 91 89 89 96100101 99 94 92 90 91 98 Max heat 98 90 96 101 100 92 96 101 101 93 98 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 82 90 82 90 82 90 82 90 Temp 90 85 82 87 90 85 82 87 90 85 82 87 90 85 82 87 90 85 Dewpt 77 77 76 77 77 77 76 76 77 77 76 76 76 76 75 76 74 75 PWind dir E E E E E E E E E Wind char GN GN GN GN GN GN GN GN GN Avg clouds SC SC SC SC B1 B1 B2 B2 B1 SC B1 B1 SC SC SC SC SC B1 PoP 12hr 30 30 50 60 60 40 20 20 50 Rain shwrs C C S C C L L L L C C C S S S S C C Tstms S S S S $$ PRZ007-220800- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 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 77 91 78 Temp 86 82 80 79 79 86 90 91 87 82 80 78 78 86 90 91 87 82 80 79 79 86 Dewpt 70 71 71 71 72 69 72 72 70 71 70 71 71 70 71 72 73 72 72 72 71 70 RH 59 69 74 77 79 57 56 54 57 69 72 79 79 59 54 54 63 72 77 79 77 59 Wind dir E E NE NE NE E SE SE SE E NE NE NE E SE SE E E E E NE E Wind spd 16 8 6 5 5 6 12 17 12 8 5 5 5 5 14 14 13 9 5 5 5 9 Wind gust 27 28 Clouds FW FW FW FW FW CL CL SC B1 FW FW FW SC CL CL SC SC FW FW FW FW CL PoP 12hr 5 40 20 20 0 QPF 12hr 0.01 0.10 0.03 0.15 0 Rain shwrs S S S S S C S S S Obvis H Heat index 91 86 84 83 90 98 99 92 86 83 90 97 98 94 87 85 82 91 Max heat 95 85 90 99 97 84 90 98 98 86 91 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 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 79 90 78 91 78 91 78 91 Temp 91 83 80 86 90 82 79 86 91 82 79 86 91 82 79 86 91 82 Dewpt 72 73 71 71 73 73 73 72 74 73 70 70 72 72 70 70 71 73 PWind dir E E E E E NE E NE E Wind char GN LT GN LT GN LT GN LT GN Avg clouds FW SC CL CL FW SC CL CL FW FW CL CL CL CL CL FW FW FW PoP 12hr 20 0 20 0 10 0 0 0 10 Rain shwrs S S S S S S S $$ PRZ008-220800- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 77 89 77 89 77 Temp 85 81 79 78 78 84 88 89 85 81 79 78 78 84 88 89 85 81 79 78 78 84 Dewpt 76 76 76 74 74 76 77 77 77 77 76 74 73 75 77 77 77 77 77 75 75 77 RH 75 85 91 88 88 77 70 68 77 88 91 88 85 74 70 68 77 88 94 91 91 80 Wind dir E E E E E E E NE E E E E E E E E E E E E E E Wind spd 19 17 16 13 14 11 9 14 13 18 13 13 11 10 9 14 13 18 9 11 11 11 Clouds SC FW FW FW FW FW FW B1 B1 SC SC SC CL FW FW B2 B2 SC SC SC SC CL PoP 12hr 5 40 30 60 10 QPF 12hr 0.02 0.09 0.05 0.46 0.01 Rain shwrs S S S S S S S C C S C S S S L L S S S S Tstms S S S Obvis H Heat index 94 87 83 94101102 96 88 84 93100102 96 88 84 95 Max heat 98 85 94 102 101 87 93 102 101 87 95 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 89 78 89 78 89 77 89 77 89 Temp 89 82 79 85 89 82 79 85 89 81 78 84 89 81 78 84 89 81 Dewpt 78 78 76 77 79 78 75 77 78 78 75 77 78 77 75 76 74 76 PWind dir E E E E E E E E E Wind char GN BZ LT LT GN GN BZ GN BZ Avg clouds FW SC SC SC FW SC SC FW FW FW FW FW FW FW CL CL FW SC PoP 12hr 20 20 40 10 5 5 10 0 20 Rain shwrs S S S S C C S S S S S S S S Tstms S S $$ PRZ010-220800- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 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 75 94 76 Temp 87 81 79 77 78 87 93 94 88 81 79 76 77 87 93 94 88 82 79 77 78 87 Dewpt 77 76 75 74 73 75 77 78 78 77 76 74 73 75 76 78 78 77 77 75 75 76 RH 72 85 88 90 85 68 60 60 72 88 91 94 87 68 58 60 72 85 94 94 91 70 Wind dir NE NE NE NE NE E NE W E E E E E E E NE NE E E E E E Wind spd 9 9 13 9 8 3 4 3 3 6 5 6 4 4 2 6 5 6 5 4 4 3 Clouds B1 FW CL CL FW CL CL B1 B2 FW SC FW CL CL CL SC SC SC SC SC SC CL PoP 12hr 5 60 5 50 10 QPF 12hr 0.01 0.64 0.01 0.38 0.01 Rain shwrs C S S C L S S C C S S S S Tstms S S S S Heat index 99 88 83 97107110101 89 96106110102 90 84 98 Max heat 105 86 97 110 109 87 96 110 109 88 98 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 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 76 94 77 94 76 94 76 94 Temp 94 82 77 87 94 83 78 88 94 82 77 87 94 82 77 87 94 82 Dewpt 80 78 75 77 80 78 75 77 80 78 75 76 80 77 75 76 73 75 PWind dir E E E E NE E NE E NE Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B1 SC SC SC B1 SC FW SC B1 SC FW FW SC CL CL FW SC PoP 12hr 60 20 60 10 60 10 40 0 40 Rain shwrs L L S S L L S S L L S S C C C C Tstms S S S S S S S S $$ VIZ001-220800- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon AST 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 82 90 82 93 82 Temp 89 85 84 83 83 87 90 90 88 85 84 82 83 89 92 93 90 86 84 83 83 88 Dewpt 71 71 72 71 71 71 70 71 71 71 72 71 71 71 72 72 72 73 73 73 73 73 RH 56 63 67 67 67 59 52 54 57 63 67 69 67 56 52 51 56 65 70 72 72 61 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 18 18 19 19 13 16 16 14 13 14 18 17 16 17 17 14 14 17 18 17 16 18 Clouds FW FW SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 40 30 20 20 QPF 12hr 0.07 0.08 0.08 0.17 0.03 Rain shwrs C S C C C S C C C C S S S S S S S S S S Obvis H Heat index 95 91 89 87 87 93 95 96 93 90 89 87 88 95100101 97 92 91 88 89 95 Max heat 98 90 93 96 96 89 95 101 100 92 95 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 AST 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 91 82 93 82 93 82 93 80 92 Temp 91 85 83 89 93 86 83 89 93 86 83 89 93 84 81 87 92 85 Dewpt 73 73 73 73 73 73 74 72 72 72 73 72 72 71 72 72 75 75 PWind dir E E E E E E E E E Wind char BZ GN GN BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC B2 B1 FW SC SC SC SC FW CL CL FW SC PoP 12hr 10 20 50 50 20 20 10 0 40 Rain shwrs S S S S S C C C S S S S S S S C Tstms S S S $$ VIZ002-220800- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 PM AST Fri Aug 21 2026 Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 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 91 81 91 81 Temp 88 84 82 81 81 87 90 91 88 84 83 82 82 87 90 91 88 84 83 82 82 87 Dewpt 75 75 75 75 75 75 75 75 75 75 75 75 75 76 76 76 76 76 77 76 76 77 RH 66 74 79 82 82 68 62 60 66 74 77 79 79 70 64 62 68 77 82 82 82 72 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 16 17 14 13 16 16 12 13 13 17 16 14 16 16 14 14 14 16 16 14 16 Clouds FW FW FW FW SC CL SC SC SC SC SC SC SC FW FW FW FW SC SC SC SC SC PoP 12hr 20 30 30 20 20 QPF 12hr 0.03 0.06 0.07 0.09 0.03 Rain shwrs S S S S S S S C S S C S S S S S S S S S Obvis H Heat index 98 92 89 86 87 96100101 97 92 90 88 89 97102103 99 94 92 89 90 98 Max heat 102 91 96 101 101 91 97 103 102 93 98 Date 08/24 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 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 81 91 81 91 81 91 80 90 Temp 91 84 82 87 91 84 82 87 91 84 82 87 91 84 81 86 90 84 Dewpt 77 77 77 77 77 77 77 77 76 76 76 76 76 76 76 76 75 74 PWind dir E E E E E E E E E Wind char BZ GN GN BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC B2 B1 SC FW SC SC FW SC SC FW FW SC PoP 12hr 10 10 50 50 20 10 10 10 50 Rain shwrs S S S S S C C C S S S S S S S S S C Tstms S S S $$