Point Forecast Matrices
Issued by NWS San Juan, PR

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Point Forecast Matrices
National Weather Service San Juan PR
503 AM AST Sat Oct 4 2025

PRZ001-042000-
Luis Munoz Marin International Airport-San Juan
18.43N  66.00W Elev. 9 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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                      90          78          91          78          90
Temp             84 89 90 84 82 80 79 78 85 90 91 85 82 80 79 78 85 89 90 84 82
Dewpt            73 75 75 74 74 75 74 74 75 76 75 75 75 75 74 74 75 75 76 75 75
RH               70 64 62 72 77 85 85 88 72 64 60 72 79 85 85 88 72 64 64 74 79
Wind dir         SE NE  E SE SE SE SE SE SE  E  E  E  E  E  E  E  E  E  E NE  E
Wind spd          2  6 11  9  5  4  4  4  4  9 12 10  6  6  6  5  6 10 10 10  8
Clouds           B1 B1 OV OV B2 SC B1 B1 SC B2 B2 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2
PoP 12hr                     80          50          60          50          50
QPF 12hr                   0.86        0.23        1.04        0.21        0.28
Rain shwrs        C  C  D  L  C  C  C  C  C  C  L  C  C  C  C  C  C  C  C  C  C
Tstms                   S  S                    S                 S  S        S
Heat index       91 99100 91 87 85       94102102 93 88 85       93 99101 92 88
Max heat         91   101    99    87    94   103   100    87    93   102   100
Coast Flood       Y  Y  Y  Y
High Surf         Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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    91      78    91      77    91      78    91
Temp          79 85 91 82   79 85 91 81   78 85 91 82   79 85 91 82
Dewpt         75 74 76 75   74 75 76 75   75 75 76 75   75 75 76 75
PWind dir         E     E      SE    SE      SE     E       E    NE
Wind char        LT    LT      LT    GN      LT    GN      LT    GN
Avg clouds    B2 B1 B1 B1   SC SC SC SC   B1 B1 B1 B1   SC SC SC B1
PoP 12hr         50    60      20    40      40    40      30    40
Rain shwrs     C  C  L  L    S  S  S  C    C  C  C  C    C  C  C  C
Tstms          S  S  S  S                        S  S

$$
PRZ002-042000-
Roosevelt Roads Naval Airstation-Ceiba PR
18.25N  65.63W Elev. 39 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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          78          89          78          90
Temp             84 88 89 84 81 80 79 78 84 88 89 84 81 80 79 78 85 89 90 84 82
Dewpt            76 76 76 76 76 76 76 76 77 76 77 77 76 76 76 75 76 77 77 76 76
RH               77 68 66 77 85 88 91 94 80 68 68 80 85 88 91 91 75 68 66 77 82
Wind dir         NE SE  E  E  E NE  E  E SE  E  E  E  E  E  E  E  E  E  E NE NE
Wind spd          3  8  6  5  3  3  3  5  8  9  8  5  8  9  9  6  6 10  8  8  8
Clouds           B2 B2 B2 OV B1 SC SC B1 B2 B2 SC SC B2 B2 B2 B2 B2 B2 B2 B2 B2
PoP 12hr                     70          50          50          60          60
QPF 12hr                   0.92        0.21        0.14        0.27        0.30
Rain shwrs        C  C  C  L  C  C  C  C  C  C  S  S  C  C  L  L  L  L  C  C  C
Tstms                   S  S                          S  S  S  S  S  S        S
Heat index       92 99100 92 88 85       94 99101 93 88 85       94102103 93 89
Max heat         92   100   100    87    94   101   101    87    94   103   101
Coast Flood       Y  Y  Y  Y
High Surf         Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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    89      78    89      78    89      78    89
Temp          79 84 89 81   79 84 89 81   79 84 89 81   79 84 89 81
Dewpt         75 77 76 76   75 76 77 76   76 77 77 77   75 77 76 76
PWind dir        NE     E      SE    SE       E     E      NE     E
Wind char        LT    LT      LT    GN      GN    GN      GN    GN
Avg clouds    B2 B2 B2 SC   SC SC SC B1   B2 B2 B1 B1   B2 B1 SC B1
PoP 12hr         60    60      20    60      60    50      50    40
Rain shwrs     C  L  L  C    S  S  C  L    L  L  C  C    C  C  C  C
Tstms          S  S                   S    S  S  S  S

$$
PRZ007-042000-
Mercedita Airport-Ponce PR
18.02N  66.56W Elev. 26 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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                      90          75          90          75          90
Temp             83 89 90 83 80 78 76 75 83 89 90 83 80 78 76 75 83 89 90 83 80
Dewpt            74 76 77 76 75 74 73 72 75 77 77 77 76 75 73 72 75 78 78 77 76
RH               74 66 66 80 85 88 90 90 77 68 66 82 88 91 90 90 77 70 68 82 88
Wind dir         NE SE SE  E NE NE NE NE  E  E SE SE  E NE NE NE NE  E SE  E NE
Wind spd          2  6  8  4  2  4  3  3  3  6  9  5  3  2  3  3  3 10 10  5  2
Clouds           FW SC B2 B2 SC FW FW SC SC SC SC SC FW FW SC SC FW FW B2 B2 B1
PoP 12hr                     60          20          30          10          50
QPF 12hr                   0.70        0.02        0.28        0.01        0.38
Rain shwrs           S  C  L  S  S     S  S  S  S  C        S  S        C  C  C
Tstms                   S  S                                            S  S
Heat index       90100103 91 84          91101103 91 84          91103104 91 84
Max heat         90   103   101          91   103   101          91   105   102


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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          75    90      76    90      76    91      76    91
Temp          76 83 90 80   77 84 90 80   77 84 91 81   77 84 91 81
Dewpt         73 75 78 76   74 76 78 76   73 75 78 77   74 76 78 77
PWind dir        NE     E       E    SE      NE     E      NE     E
Wind char        LT    LT      LT    LT      LT    GN      LT    LT
Avg clouds    B1 SC SC SC   SC FW FW FW   SC SC SC SC   CL CL SC B1
PoP 12hr         40    30       5    30      30    40       0    60
Rain shwrs     C  C  C  C    S  S     C    C  C  C  C          L  L
Tstms                                            S  S          S  S

$$
PRZ008-042000-
Rafael Hernandez Airport-Aguadilla PR
18.50N  67.13W Elev. 237 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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          75          87          76          87
Temp             82 86 87 81 79 77 76 75 82 86 87 82 79 78 77 76 82 86 87 82 79
Dewpt            73 74 75 73 73 73 73 72 75 76 76 74 75 75 73 72 74 76 76 75 75
RH               74 68 68 77 82 87 90 90 79 72 70 77 88 91 87 87 77 72 70 79 88
Wind dir          E NE NE  E  E  E  E  E  E  E NE NE NE  E  E  E  E  E NE NE  E
Wind spd          4  3  6  4  4  5  5  5  4  5  6  4  6  9  9  8  8  6  6  5  9
Clouds           CL CL B1 B2 SC SC SC SC FW FW OV OV B1 B1 CL CL FW FW B2 B2 B1
PoP 12hr                     60          20          70          40          60
QPF 12hr                   0.41        0.02        1.09        0.07        0.52
Rain shwrs              C  L  S  S  S  S        L  L  C  C              L  L  C
Tstms                      S                    S  S                    S  S
Heat index       87 94 96 86             88 96 97 87 83          88 96 97 88 83
Max heat         87    96    95          88    98    95          88    98    96
Coast Flood       Y  Y  Y  Y
High Surf         Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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    87      75    87      75    87      76    88
Temp          77 82 87 79   76 82 87 79   76 82 87 79   77 83 88 80
Dewpt         73 74 76 74   74 74 76 75   74 75 76 75   75 76 76 75
PWind dir         E    NE       E    NE       E     E       E    NE
Wind char        GN    LT      LT    LT      LT    LT      GN    BZ
Avg clouds    B1 B1 B1 B2   B2 B1 SC SC   FW FW SC B1   FW FW SC FW
PoP 12hr         40    60      60    50       0    60       5    10
Rain shwrs     C  C  L  L    L  L  C  C          L  L       S  S  S
Tstms                S  S    S  S  S  S          S  S

$$
PRZ010-042000-
Eugenio Maria de Hosto Airport-Mayaguez PR
18.27N  67.15W Elev. 28 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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                      92          74          93          74          92
Temp             84 91 92 83 79 77 75 74 85 91 93 84 80 77 75 74 84 91 92 83 79
Dewpt            74 75 77 75 74 74 73 73 75 77 78 77 76 75 74 74 76 77 78 77 76
RH               72 60 62 77 85 90 94 97 72 64 62 80 88 94 97100 77 64 64 82 91
Wind dir          E NW  W  E NE  E  E  E  E NE  N NE NE  E  E  E  E NE  N NE  E
Wind spd          2  2  4  2  3  3  3  4  4  4  5  5  4  5  5  4  3  2  4  2  3
Clouds           CL SC B2 OV CL FW FW FW CL CL OV B2 SC SC CL CL FW FW OV OV FW
PoP 12hr                     90           5          70           5          70
QPF 12hr                   1.12           0        1.01        0.01        1.05
Rain shwrs           S  L  D                    L  L  S  S              L  L
Tstms                   S  S                    S  S                    S  S
Heat index       91101105 91 83          93105108 93 85          93104107 92 84
Max heat         91   105   104          93   109   106          93   107   105
High Surf         Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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    92      75    93      74    93      75    93
Temp          75 84 92 80   76 85 93 80   75 85 93 80   76 85 93 80
Dewpt         74 75 78 76   74 76 77 76   74 75 78 76   75 76 78 77
PWind dir         E     N       E    SE       E     E       E    NE
Wind char        LT    LT      LT    LT      LT    LT      LT    GN
Avg clouds    FW FW SC B2   B1 SC SC SC   FW FW SC B1   FW FW SC SC
PoP 12hr          5    60      40    40       5    60       5    30
Rain shwrs           L  L    C  C  C  C          L  L          C  C
Tstms                S  S          S  S          S  S

$$
VIZ001-042000-
CYRIL E. King Airport-St Thomas USVI
18.33N  64.97W Elev. 23 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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                      90          81          91          82          91
Temp             86 89 90 86 84 83 82 81 87 90 91 87 85 84 83 82 87 90 91 86 84
Dewpt            76 77 77 77 77 77 77 77 77 77 76 77 76 76 77 77 77 77 77 77 76
RH               72 68 66 75 80 82 85 88 72 66 62 72 75 77 82 85 72 66 64 75 77
Wind dir          E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E NE
Wind spd          6  8  5  5  8  9  9 10 11 10  9  9 12 13 14 12 13 11 10  9 11
Clouds           B2 B2 B2 B2 B1 SC B1 B1 B2 B2 SC SC B2 B2 B2 B2 B2 B2 B2 B2 B2
PoP 12hr                     50          50          50          60          60
QPF 12hr                   0.24        0.21        0.20        0.27        0.30
Rain shwrs        C  C  C  C  C  C  C  C  C  C  C  C  C  C  L  L  L  L  C  C  C
Tstms                   S  S                          S  S  S  S  S  S        S
Heat index       96102103 97 93 91 89 88 98103103 98 94 92 91 90 99104104 97 93
Max heat         96   103   105    92    98   103   103    93    99   105   103
High Surf         Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y  Y


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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    91      81    91      82    91      82    91
Temp          82 87 91 84   82 87 91 85   83 87 91 85   83 87 91 85
Dewpt         77 77 77 77   77 77 77 77   78 78 78 77   78 77 77 77
PWind dir         E    SE      SE    SE       E     E       E     E
Wind char        GN    GN      GN    GN      GN    GN      BZ    GN
Avg clouds    B2 B2 B1 SC   SC SC SC B1   B2 B2 B1 SC   SC SC SC B1
PoP 12hr         60    60      30    60      60    40      30    50
Rain shwrs     C  L  L  S    S  C  C  L    L  L  C  C    C  C  C  C
Tstms          S  S                   S    S  S                S  S

$$
VIZ002-042000-
Henry E. Rohlsen Airport-St Croix USVI
17.70N  64.80W Elev. 74 ft
503 AM AST Sat Oct 4 2025

Date             Sat 10/04/25            Sun 10/05/25            Mon 10/06/25
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                      90          77          90          78          90
Temp             84 89 90 84 81 79 78 77 84 89 90 84 82 80 79 78 85 89 90 84 81
Dewpt            76 77 77 76 76 75 76 76 77 76 77 76 76 76 76 75 76 76 77 76 76
RH               77 68 66 77 85 88 94 97 80 66 66 77 82 88 91 91 75 66 66 77 85
Wind dir          E  E  E  E  E  E  E  E  E  E  E  E NE  E  E  E  E  E  E NE NE
Wind spd          5  8  6  4  5  8  8  9 10  9  8  8 10 12 11 10 10 10  9  8  8
Clouds           B2 B1 B2 B2 B1 SC B1 B1 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 SC
PoP 12hr                     50          50          50          60          60
QPF 12hr                   0.27        0.21        0.22        0.27        0.28
Rain shwrs        C  C  C  C  C  C  C  C  C  C  C  C  C  C  L  L  L  L  C  C  S
Tstms                   S  S                          S  S  S  S  S  S
Heat index       93102103 92 87 83       94100103 93 89 86       94100103 92 87
Max heat         93   103   101    86    94   103   101    87    94   103   101


Date          Tue 10/07/25  Wed 10/08/25  Thu 10/09/25  Fri 10/10/25
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          77    89      78    90      78    90      77    89
Temp          78 84 89 81   79 85 90 82   79 85 90 81   78 84 89 81
Dewpt         75 77 77 76   76 77 77 76   76 78 78 76   76 78 77 76
PWind dir         E    SE      SE    SE       E     E      NE     E
Wind char        LT    GN      GN    GN      GN    GN      GN    GN
Avg clouds    SC SC SC SC   SC SC SC B1   B2 B1 SC SC   FW FW SC SC
PoP 12hr         30    30      30    50      50    30      20    30
Rain shwrs     S  C  C  S    S  C  C  C    C  C  C  C       S  C  C

$$