Point Forecast Matrices
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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814 FOCA52 TJSJ 180903 PFMSJU Point Forecast Matrices National Weather Service San Juan PR 503 AM AST Mon Aug 18 2025 PRZ001-182000- Luis Munoz Marin International Airport-San Juan 18.43N 66.00W Elev. 9 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 79 93 79 92 Temp 85 88 89 86 82 81 80 80 88 92 93 89 84 82 80 80 87 91 92 88 83 Dewpt 77 77 77 77 76 76 76 76 76 77 76 76 76 76 76 76 77 77 77 77 76 RH 77 70 68 75 82 85 88 88 68 62 58 66 77 82 88 88 72 64 62 70 80 Wind dir S S S S S SE SE SE SE SE SE SE SE SE SE SE SE E E E E Wind spd 14 18 17 12 8 8 5 5 8 11 13 11 9 5 5 5 8 13 17 12 11 Clouds SC SC B1 B2 SC SC SC SC SC CL SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 50 30 30 30 30 QPF 12hr 0.51 0.12 0.06 0.09 0.11 Rain shwrs S C C C S S S C S C C S S S S C C S S S Tstms S Obvis H H H H H H H Heat index 96101102 97 90 87 84 86 99106106100 92 89 85 86 99105106100 92 Max heat 96 102 101 90 99 106 105 91 99 106 105 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 79 92 79 90 78 90 78 91 Temp 80 87 92 83 80 86 90 82 79 85 90 82 79 86 91 83 Dewpt 75 75 75 75 76 76 77 77 76 76 76 76 76 76 77 76 PWind dir E E E NE NE SE SE E Wind char GN GN GN GN BZ BZ GN BZ Avg clouds SC SC SC SC SC SC B1 B1 B2 B2 B2 B1 SC SC B1 B1 PoP 12hr 20 30 40 60 60 60 30 60 Rain shwrs S S C C S C C L L L L L S C L L Tstms S S S S S S S $$ PRZ002-182000- Roosevelt Roads Naval Airstation-Ceiba PR 18.25N 65.63W Elev. 39 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 80 91 80 91 Temp 85 88 88 86 83 82 80 81 87 90 91 88 84 82 81 81 87 90 91 88 84 Dewpt 78 79 78 79 78 78 78 77 78 78 78 78 77 78 77 77 78 78 78 77 77 RH 80 75 72 80 85 88 94 88 75 68 66 72 80 88 88 88 75 68 66 70 80 Wind dir S S S S S S S SE SE SE SE SE SE SE SE SE SE SE SE E E Wind spd 18 19 17 13 10 11 11 10 9 10 10 11 9 9 10 11 12 14 13 12 11 Clouds OV B1 B1 OV B1 SC B2 B1 B1 SC SC SC SC SC B1 B1 B2 B2 SC SC SC PoP 12hr 70 50 40 50 50 QPF 12hr 0.67 0.30 0.10 0.18 0.29 Rain shwrs L C C L C C C C C C C C C C C C C C C C S Tstms S S S Obvis H Heat index 97102102 99 92 90 88 88100105106101 93 91 88 88100105106100 93 Max heat 97 103 102 91 100 106 106 92 100 106 105 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 80 90 80 90 79 89 80 90 Temp 81 86 90 83 81 86 90 83 80 85 89 83 81 86 90 84 Dewpt 76 76 76 76 76 77 77 77 77 77 77 76 77 78 78 77 PWind dir E E NE NE NE SE SE SE Wind char GN GN GN GN GN BZ GN BZ Avg clouds SC SC SC SC SC B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 40 60 60 60 40 50 Rain shwrs S C C C C C C L L L L L C C C C Tstms S S S S S $$ PRZ007-182000- Mercedita Airport-Ponce PR 18.02N 66.56W Elev. 26 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 85 78 88 77 90 Temp 82 85 85 83 80 79 78 79 84 87 88 85 81 79 78 78 85 89 90 86 81 Dewpt 77 80 80 79 78 77 76 76 78 80 79 78 78 75 75 75 77 80 79 79 78 RH 85 85 85 88 94 94 94 91 82 80 75 80 91 88 91 91 77 75 70 80 91 Wind dir S S S S S SE E E E SE SE SE E NE E E E SE SE E E Wind spd 16 16 14 10 5 8 9 8 10 10 10 8 6 6 6 6 8 11 12 9 8 Wind gust 26 26 25 Clouds OV OV OV OV B2 B1 B2 B1 SC SC SC SC SC SC SC SC SC SC FW FW FW PoP 12hr 80 60 20 30 30 QPF 12hr 0.95 0.35 0.05 0.09 0.09 Rain shwrs L L L D L C C C S S S S S S S S C C S S Tstms S S S S S S Obvis H H H H H H H Heat index 91 98 99 94 88 84 95104103 96 89 83 96107106 99 89 Max heat 91 99 100 86 95 104 102 86 96 107 105 Flood A A A A Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 90 76 90 77 87 77 89 Temp 77 85 90 81 77 85 90 81 78 83 87 80 78 84 89 81 Dewpt 73 74 78 76 73 75 79 77 75 77 79 77 74 77 79 77 PWind dir NE E NE E NE SE E E Wind char LT GN LT GN LT BZ GN GN Avg clouds FW FW FW SC FW FW SC B2 B2 B2 B2 B1 SC SC SC B1 PoP 12hr 5 10 5 50 50 50 20 50 Rain shwrs S S S C C C C C C S S C C $$ PRZ008-182000- Rafael Hernandez Airport-Aguadilla PR 18.50N 67.13W Elev. 237 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 87 77 90 77 90 Temp 84 86 87 84 80 79 78 78 85 89 90 86 81 79 78 78 85 89 90 86 81 Dewpt 76 77 77 76 76 76 76 76 76 77 77 76 76 76 75 74 75 77 77 77 77 RH 77 75 72 77 88 91 94 94 75 68 66 72 85 91 91 88 72 68 66 75 88 Wind dir S S S S S S S SE SE SE SE SW S SE SE E E E NE NE E Wind spd 18 21 23 18 14 10 11 8 9 10 6 3 2 4 4 2 5 4 8 8 2 Clouds SC B2 B2 B2 B2 SC SC CL CL CL B2 B2 CL CL CL CL CL CL B1 B1 FW PoP 12hr 60 50 60 0 40 QPF 12hr 0.74 0.12 0.60 0 0.20 Rain shwrs S C L L C S S L L C C Tstms S S S S S S S S Obvis H H H H H H H Heat index 92 98 99 93 86 95102103 96 88 84 94102103 97 88 Max heat 92 99 98 85 95 103 102 87 94 103 102 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 88 77 88 77 87 76 89 Temp 77 83 88 81 78 84 88 81 78 83 87 80 77 84 89 81 Dewpt 75 74 76 76 75 76 77 76 76 77 76 75 76 76 76 75 PWind dir E NE E NE NE E SE E Wind char LT GN GN BZ BZ BZ GN GN Avg clouds FW FW SC SC FW FW SC B1 SC SC B1 B1 SC SC SC B1 PoP 12hr 5 30 5 30 30 50 20 60 Rain shwrs C C C C C C C C S S L L Tstms S S $$ PRZ010-182000- Eugenio Maria de Hosto Airport-Mayaguez PR 18.27N 67.15W Elev. 28 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 87 77 93 76 94 Temp 83 86 87 84 80 79 78 79 87 92 93 88 82 79 77 78 87 93 94 88 81 Dewpt 77 79 80 78 78 77 77 76 78 79 78 78 76 76 76 75 76 79 79 78 78 RH 82 80 80 82 94 94 97 91 75 66 62 72 82 91 97 91 70 64 62 72 91 Wind dir S S S S S S S SE SE S S SE SE SE SE E E SE SE E NE Wind spd 18 20 20 17 13 11 12 11 12 13 13 12 8 8 6 4 5 10 12 4 1 Clouds SC B2 OV OV B2 B1 SC CL CL CL B1 B1 CL CL CL CL FW FW B1 B1 FW PoP 12hr 80 60 40 0 40 QPF 12hr 0.92 0.18 0.40 0 0.20 Rain shwrs S C D L L C C C C C C Tstms S S S S S S Obvis H H H H H H H Heat index 92100103 95 88 100109109101 89 84 98110112101 89 Max heat 92 103 101 85 100 111 107 87 98 112 110 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 93 75 93 76 91 76 93 Temp 75 86 93 81 76 86 93 82 77 85 91 81 77 87 93 82 Dewpt 75 75 78 76 74 76 79 77 76 77 79 76 76 76 78 77 PWind dir E NE E NE NE E SE SE Wind char LT LT GN GN GN BZ GN GN Avg clouds FW FW SC SC FW FW SC B2 SC SC B1 B1 SC SC SC B1 PoP 12hr 5 40 5 60 30 50 20 60 Rain shwrs C C L L C C C C S S L L Tstms S S S S $$ VIZ001-182000- CYRIL E. King Airport-St Thomas USVI 18.33N 64.97W Elev. 23 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 AST 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 83 92 82 92 Temp 86 89 89 87 85 84 83 84 89 91 92 89 85 84 83 83 88 91 92 89 85 Dewpt 78 79 78 79 78 78 78 77 77 78 77 77 77 78 79 78 78 78 77 77 77 RH 77 73 70 77 80 82 85 80 68 66 62 68 77 82 88 85 72 66 62 68 77 Wind dir S S S S S SE SE SE SE SE SE SE SE E E E E E E E E Wind spd 21 21 18 16 13 14 14 14 11 14 14 12 13 17 16 18 17 18 19 16 14 Clouds B2 B2 B2 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 50 20 30 30 30 QPF 12hr 0.54 0.04 0.06 0.13 0.10 Rain shwrs C C C C S S S S S S S S C C C C C C S S S Tstms S S S Obvis H H H H H Heat index 99104103102 97 95 94 94101107106102 96 95 93 93102107106101 95 Max heat 99 104 104 97 101 107 105 95 102 107 105 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 AST 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 81 93 81 92 79 92 82 92 Temp 82 88 93 85 82 88 92 83 80 87 92 85 83 88 92 85 Dewpt 76 76 75 76 76 77 77 77 78 77 76 77 77 77 77 78 PWind dir E E NE NE E SE SE E Wind char BZ GN BZ BZ WY WY BZ BZ Avg clouds SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B1 SC PoP 12hr 30 40 50 60 60 60 50 50 Rain shwrs S C C C C C C L L L L L C C C C Tstms S S S S S $$ VIZ002-182000- Henry E. Rohlsen Airport-St Croix USVI 17.70N 64.80W Elev. 74 ft 503 AM AST Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 90 79 90 Temp 85 88 89 86 83 82 81 81 86 89 90 87 83 81 80 80 86 89 90 86 82 Dewpt 78 79 78 78 77 77 77 77 77 78 77 77 76 78 77 78 78 78 77 77 76 RH 80 75 70 77 82 85 88 88 75 70 66 72 80 91 91 94 77 70 66 75 82 Wind dir S S S S SE SE SE SE SE SE SE SE E E E E E E E E E Wind spd 20 20 18 13 11 11 12 11 10 14 14 12 10 13 13 16 17 17 18 14 13 Clouds B1 B2 B2 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC CL CL SC PoP 12hr 50 30 20 30 30 QPF 12hr 0.13 0.04 0.05 0.12 0.09 Rain shwrs C C C C C S S S S S S S S S C C C C S Tstms S S Obvis H H H H H H H Heat index 97104103 99 92 90 87 88 97104103 98 90 89 85 88 98104103 98 89 Max heat 97 104 102 92 97 104 102 90 98 104 102 Flood A A A A High Surf Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 77 90 79 90 Temp 79 85 90 82 79 85 90 81 78 85 90 83 80 86 90 83 Dewpt 75 76 75 76 76 77 77 77 76 77 76 76 77 77 77 77 PWind dir E E NE NE E SE SE E Wind char GN GN GN BZ BZ BZ BZ BZ Avg clouds SC SC SC SC SC B1 B1 B1 B2 B2 B2 B2 B2 B2 B1 SC PoP 12hr 20 30 50 60 60 60 50 50 Rain shwrs S S S C C C C L L L L C C C C S Tstms S S S S $$