Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
1
2
984 FOCA52 TJSJ 210632 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 232 AM AST Fri Aug 21 2026 PRZ001-212000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 92 80 93 Temp 82 87 90 91 88 84 82 81 81 87 91 92 88 84 82 81 81 88 92 93 89 85 Dewpt 74 74 74 75 75 76 76 75 75 75 75 76 75 76 76 75 75 75 76 76 76 76 RH 77 65 60 60 66 77 82 82 82 68 60 60 66 77 82 82 82 66 60 58 66 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 11 13 17 16 14 11 11 9 9 10 13 16 13 10 9 11 9 11 13 17 14 11 Clouds SC FW SC SC FW SC SC SC SC FW SC SC SC SC SC SC SC B1 B1 SC SC B1 PoP 12hr 30 30 40 40 40 QPF 12hr 0.17 0.09 0.14 0.09 0.09 Rain shwrs S S S S S C C S S S C C C C C C C C C S S C Obvis H H H H H Heat index 88 96100102 98 92 89 86 87 97102104 99 92 89 86 87 98104106101 95 Max heat 96 102 101 91 97 104 103 91 98 106 105 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 93 81 93 80 93 81 92 Temp 82 88 93 85 82 88 93 84 81 88 93 85 82 88 92 85 Dewpt 76 76 77 77 76 77 77 77 76 76 76 76 76 76 72 73 PWind dir E E E E E E E E Wind char GN GN GN BZ GN BZ GN BZ Avg clouds B1 B1 SC SC SC SC SC SC B2 B1 SC SC SC SC B1 B1 PoP 12hr 40 30 20 50 50 20 50 50 Rain shwrs C C C S S S S C C C S S S C C C Tstms S S S $$ PRZ002-212000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 81 90 82 90 Temp 83 86 88 88 86 83 82 81 82 87 89 90 88 85 84 82 83 87 90 90 88 85 Dewpt 74 74 74 75 75 76 75 75 75 75 75 75 76 75 75 75 75 75 76 76 76 76 RH 74 68 63 66 70 80 79 82 79 68 64 62 68 72 74 79 77 68 64 64 68 75 Wind dir E E E E NE NE E E E E E E E E E E E E E E E E Wind spd 13 13 14 13 14 11 12 11 10 12 13 11 11 10 12 12 11 13 14 12 12 12 Clouds SC FW SC SC FW SC SC SC SC FW SC SC B2 SC SC SC SC B1 B1 SC SC B1 PoP 12hr 30 30 50 40 40 QPF 12hr 0.16 0.09 0.18 0.08 0.09 Rain shwrs S S S S C S S C S C C C C C C C C C S S C Tstms S Obvis H H H H H Heat index 89 94 97 98 96 92 90 88 88 96100101 98 93 91 89 90 97101102 98 94 Max heat 94 98 98 91 96 101 101 93 97 102 101 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 82 90 82 90 82 90 82 90 Temp 82 87 90 85 82 87 90 85 82 87 90 85 82 87 90 85 Dewpt 76 76 77 77 76 76 77 77 76 76 76 76 76 76 74 73 PWind dir E E E E E E E E Wind char GN GN GN BZ BZ GN BZ GN Avg clouds B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 SC B1 B2 B1 PoP 12hr 50 50 30 50 50 50 50 50 Rain shwrs C C C S S C C C C C C C C C C C Tstms S S S $$ PRZ007-212000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 78 91 77 91 Temp 79 86 89 90 86 82 80 79 79 86 90 91 87 82 80 78 78 86 90 91 87 82 Dewpt 69 70 70 70 71 72 72 72 71 70 71 72 74 72 72 72 72 72 72 73 73 73 RH 72 59 54 52 61 72 77 79 77 59 54 54 65 72 77 82 82 63 56 56 63 74 Wind dir NE E E SE SE NE NE NE NE E E SE SE E NE NE NE E SE SE SE E Wind spd 5 10 16 18 16 8 6 3 5 4 13 14 14 10 5 4 5 6 13 16 13 10 Wind gust 27 31 26 24 25 26 24 Clouds CL CL CL FW SC FW FW FW FW CL CL SC SC CL CL FW FW FW FW FW FW FW PoP 12hr 10 5 20 5 0 QPF 12hr 0.10 0.01 0.04 0.01 0 Rain shwrs S S S S S S S S S Obvis H H H H H Heat index 82 91 95 96 92 87 84 82 91 97 98 95 86 83 92 98100 95 88 Max heat 91 96 96 86 91 98 98 85 92 100 99 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 91 79 90 78 91 78 91 Temp 79 86 91 83 80 86 90 82 79 86 91 82 79 86 91 82 Dewpt 72 71 73 74 73 73 72 72 71 70 73 73 72 70 71 74 PWind dir E E E E E E NE E Wind char LT GN LT GN GN GN LT GN Avg clouds FW FW FW SC FW FW FW SC SC SC FW SC SC SC SC SC PoP 12hr 0 10 0 10 10 20 20 30 Rain shwrs S S S S S S S S S S C C $$ PRZ008-212000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 77 89 77 89 Temp 78 84 88 88 85 81 79 78 78 84 88 89 85 81 79 78 78 84 88 89 85 81 Dewpt 73 75 76 77 77 76 76 75 74 76 77 78 77 77 76 74 75 76 77 78 78 78 RH 85 74 68 70 77 85 91 91 88 77 70 70 77 88 91 88 91 77 70 70 80 91 Wind dir E E E E E E E E E E E NE E E E E E E E NE E E Wind spd 13 12 14 18 19 19 16 13 13 13 9 11 14 18 13 13 11 11 9 11 16 18 Clouds FW CL CL FW SC FW FW FW FW FW FW SC B1 CL CL FW FW SC SC B1 B1 SC PoP 12hr 20 5 40 10 40 QPF 12hr 0.16 0.02 0.17 0.02 0.11 Rain shwrs S S S S S S S S C C S S S S C C S Obvis H H H H H Heat index 92 99100 95 87 83 94101103 96 88 84 93100103 97 89 Max heat 92 100 99 86 94 103 102 87 93 103 102 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 77 89 78 89 78 89 77 89 Temp 78 84 89 82 79 85 89 82 79 85 89 81 78 84 89 81 Dewpt 75 77 78 78 76 77 78 78 75 77 78 78 75 76 74 74 PWind dir E E E E E E E E Wind char GN BZ BZ GN GN BZ BZ BZ Avg clouds SC SC SC B1 SC SC SC SC FW FW SC SC FW FW SC SC PoP 12hr 10 50 20 30 10 20 10 20 Rain shwrs S S C C S S C C S S S S S S Tstms S S $$ PRZ010-212000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 94 Temp 77 86 91 92 87 81 79 77 78 87 93 94 88 81 79 76 77 87 93 94 88 82 Dewpt 73 75 76 78 78 77 76 75 74 76 77 78 78 77 76 74 75 76 77 78 78 77 RH 87 70 62 64 75 88 91 94 88 70 60 60 72 88 91 94 94 70 60 60 72 85 Wind dir E E NE SW N NE NE NE E E E N E E E E E E E N E E Wind spd 6 4 5 5 9 8 10 9 6 3 4 6 8 6 4 6 5 3 4 6 3 2 Clouds CL CL CL FW B2 FW CL CL FW CL CL SC B2 CL CL FW FW FW FW SC SC SC PoP 12hr 60 5 60 5 30 QPF 12hr 0.37 0.01 0.85 0.01 0.07 Rain shwrs S L S S C L S S C C S Tstms S Obvis H H H H Heat index 94103107100 88 83 98107111101 89 97108111103 90 Max heat 94 107 106 86 98 111 109 87 97 111 110 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 94 76 94 77 94 76 94 Temp 77 87 94 82 77 87 94 83 78 88 94 82 77 87 94 82 Dewpt 75 77 79 78 76 77 80 77 76 77 79 78 75 77 73 73 PWind dir E E E E E NE E E Wind char LT LT LT LT LT LT GN LT Avg clouds SC SC SC B1 SC SC SC B1 SC SC SC B1 SC SC SC SC PoP 12hr 10 50 20 50 10 60 20 40 Rain shwrs S S C C S S C C S S L L S S C C Tstms S S S S S S $$ VIZ001-212000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 91 82 90 82 93 Temp 83 88 91 91 88 85 84 83 83 87 90 90 88 85 84 82 83 89 92 93 90 86 Dewpt 74 75 74 74 75 75 76 76 75 75 75 74 75 75 75 76 76 76 75 75 76 76 RH 74 66 58 58 66 72 77 80 77 68 62 60 66 72 74 82 80 66 58 56 64 72 Wind dir E E E E E E E E E E E E E E E E E E E E E E Wind spd 18 18 17 17 18 17 18 17 17 16 16 13 14 16 19 17 19 17 16 16 17 18 Clouds SC FW SC FW FW FW SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 30 40 40 20 QPF 12hr 0.09 0.08 0.14 0.07 0.06 Rain shwrs S S S S C S C C C C C C C C C S S S S S Obvis H H H H H Heat index 90 97101101 98 94 92 90 90 97100100 97 93 92 90 91100104105101 96 Max heat 97 101 101 93 97 100 99 92 100 105 104 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 82 91 82 93 82 93 82 93 Temp 83 88 91 85 83 89 93 86 83 89 93 86 83 89 93 86 Dewpt 77 77 76 77 77 77 76 77 77 76 75 76 76 76 73 74 PWind dir E E E E E E E E Wind char BZ BZ BZ WY BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 PoP 12hr 30 30 10 30 30 30 30 50 Rain shwrs S C C C S S C C C C C C S C C C $$ VIZ002-212000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 232 AM AST Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 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 89 80 91 81 91 Temp 82 86 89 89 86 83 82 81 81 87 90 91 88 84 83 82 82 87 90 91 88 84 Dewpt 75 75 75 75 76 76 76 75 76 76 76 75 75 76 76 76 76 76 76 76 77 77 RH 79 70 64 64 72 80 82 82 85 70 64 60 66 77 80 82 82 70 64 62 70 80 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 17 17 16 18 16 17 16 14 16 16 16 13 12 16 16 14 17 16 16 16 16 Clouds SC FW FW FW FW FW FW FW SC CL SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 10 20 50 20 20 QPF 12hr 0.08 0.04 0.05 0.04 0.04 Rain shwrs S S S S S S S S S C S S S S S S S S S S Obvis H H H H H Heat index 88 95 99100 96 91 89 86 87 97102102 98 93 91 88 89 98103104 99 94 Max heat 95 100 100 90 97 103 102 92 98 104 103 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 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 91 81 91 81 91 81 91 Temp 82 87 91 84 82 87 91 84 82 87 91 84 82 87 91 84 Dewpt 77 77 77 77 77 77 77 77 77 77 76 77 76 76 72 73 PWind dir E E E E E E E E Wind char BZ BZ BZ BZ BZ BZ BZ BZ Avg clouds SC SC SC SC FW FW SC SC SC SC SC SC SC SC SC SC PoP 12hr 30 30 10 30 30 20 20 30 Rain shwrs S C C S S C C C C S S S S C C $$