Point Forecast Matrices
Issued by NWS San Juan, PR

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Point Forecast Matrices
National Weather Service San Juan PR
503 PM AST Fri Aug 29 2025

PRZ001-300800-
Luis Munoz Marin International Airport-San Juan
18.43N  66.00W Elev. 9 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          80          92          79
Temp             83 82 81 81 87 90 91 88 84 82 81 81 87 91 92 88 83 81 80 79 87
Dewpt            76 77 76 75 76 76 76 76 75 76 75 75 75 75 76 75 75 75 75 75 75
RH               80 85 85 82 70 64 62 68 74 82 82 82 68 60 60 66 77 82 85 88 68
Wind dir          E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
Wind spd          8  6  6  6  8 12 14 12  9  8  5  8  8 12 13 12  9  6  5  6  6
Clouds           SC B1 SC SC SC SC SC SC FW SC B1 B1 SC SC SC SC SC SC SC SC SC
PoP 12hr                     40          30          40          20          30
QPF 12hr                   0.18        0.08        0.10        0.09        0.07
Rain shwrs        S  C  S  S  C  C  S  S  S  C  C  C  S  S  S  S  S  S  S  S  C
Tstms
Heat index       92 90 86 87 98102103 99 92 89 87 87 96102105 98 90 87 85    96
Max heat         98    91    98   103   102    91    96   105   103    89    96


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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          92      79    92      79    92      79    92      79    92
Temp          92 83   80 87 92 83   80 87 92 83   80 87 92 83   80 87 92 83
Dewpt         76 75   76 76 76 76   75 75 76 75   75 75 75 75   75 76 76 76
PWind dir         E      SE     E      SE     E       E     E       E     E
Wind char        GN      LT    GN      LT    GN      LT    GN      LT    GN
Avg clouds    B1 SC   SC SC B1 B1   SC B1 SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         40      40    50      40    40      30    30      30    30
Rain shwrs     C  C    S  C  C  C    C  C  C  S    S  C  C  S    S  C  C  S
Tstms          S  S          S  S

$$
PRZ002-300800-
Roosevelt Roads Naval Airstation-Ceiba PR
18.25N  65.63W Elev. 39 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          90          79          90          80
Temp             83 82 81 81 86 89 90 87 83 81 80 80 86 89 90 87 83 82 81 80 86
Dewpt            78 77 77 77 77 77 77 76 76 76 76 76 77 77 76 77 76 77 76 76 77
RH               85 85 88 88 75 68 66 70 80 85 88 88 75 68 64 72 80 85 85 88 75
Wind dir          E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
Wind spd          9  9  8  8  9 11 10  9  9  9  6  9  9 11 10  9  8  9  8  8  9
Clouds           B1 B1 B1 B1 B1 B1 SC SC FW SC B1 B1 B1 B1 SC SC SC SC SC SC B2
PoP 12hr                     40          40          40          40          50
QPF 12hr                   0.31        0.10        0.11        0.13        0.10
Rain shwrs        C  C  C  C  C  C  S  S     C  C  C  C  C  S  S  C  C  C  C  C
Heat index       93 90 87 88 97102103 98 91 87 86 86 97102102 99 91 90 87 86 97
Max heat        100    92    97   103   102    89    97   103   102    90    97


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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      80    90      80    90      78    90      79    90
Temp          90 83   81 86 90 83   81 86 90 82   79 85 90 82   80 85 90 83
Dewpt         77 76   76 77 77 76   77 77 77 76   76 77 77 75   77 77 76 77
PWind dir         E       E     E       E     E       E     E       E     E
Wind char        GN      GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1 B1   SC SC B1 SC   B2 B2 B1 SC   SC SC SC SC   SC SC B1 B1
PoP 12hr         50      50    50      50    50      30    30      30    40
Rain shwrs     C  C    S  C  C  C    C  C  C  S    S  C  C  C    C  C  C  C
Tstms          S  S

$$
PRZ007-300800-
Mercedita Airport-Ponce PR
18.02N  66.56W Elev. 26 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          90          76          90          78
Temp             81 79 77 79 85 89 90 86 81 79 77 77 85 89 90 86 82 80 79 78 85
Dewpt            75 74 73 73 76 78 78 79 76 75 74 72 75 77 78 78 77 75 74 73 75
RH               82 85 87 82 75 70 68 80 85 88 90 85 72 68 68 77 85 85 85 85 72
Wind dir          E NE NE NE  E SE SE  E  E NE NE NE NE  E SE  E  E  E NE  E  E
Wind spd          5  4  3  3  3 12 12  8  4  3  4  4  3 12 11  9  4  4  3  4  4
Clouds           SC CL SC FW SC FW SC SC CL SC CL CL SC SC SC SC SC SC SC SC SC
PoP 12hr                     10          10          10          20          20
QPF 12hr                   0.03        0.02        0.01        0.12        0.04
Rain shwrs        S     S     S     S  S     S        S  S  S  S  S  S  S  S  S
Heat index       86          94103105100 87          94102105 98 90 85       94
Max heat         95    84    94   105   105    86    94   105   103    87    94


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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      77    90      77    90      77    90      77    90
Temp          90 81   78 85 90 81   78 85 90 81   78 85 90 81   78 85 90 81
Dewpt         78 77   73 73 74 73   73 72 73 73   72 71 74 73   72 69 72 73
PWind dir         E       E     E       E     E       E     E       E     E
Wind char        GN      LT    GN      LT    GN      LT    GN      LT    GN
Avg clouds    SC SC   FW FW FW SC   SC SC SC SC   SC FW FW SC   SC SC SC SC
PoP 12hr         20       5    10      20    20      10    20      10    20
Rain shwrs     S  S          S  S    S  S  S  S    S  S  S  S    S  S  S  S

$$
PRZ008-300800-
Rafael Hernandez Airport-Aguadilla PR
18.50N  67.13W Elev. 237 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          88          78          88          79
Temp             80 78 77 82 85 88 88 85 81 80 79 79 84 87 88 85 82 80 79 79 84
Dewpt            75 76 76 74 75 76 77 74 76 76 75 74 75 75 76 75 75 76 76 74 75
RH               85 94 97 77 72 68 70 70 85 88 88 85 74 68 68 72 79 88 91 85 74
Wind dir          E  E  E  E  E  E NE  E  E  E  E  E  E  E NE NE  E  E  E  E  E
Wind spd          6  5  5  9 10  6  5 10 12 11 10 11 10  8  5  8 11  8  8  9  9
Clouds           FW SC FW CL CL CL B1 B2 SC FW CL SC FW FW SC SC SC SC SC SC FW
PoP 12hr                      5          50          20          30          10
QPF 12hr                   0.03        0.48        0.03        0.43        0.02
Rain shwrs        S  S              C  C  S        S  S  S  C  C  S  S  S  S
Tstms                               S  S
Heat index       84       88 94 99100 93 87 86       92 96 99 94 89 86       92
Max heat         92          94   100   100    87    92    99    99    87    92


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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      77    88      77    88      77    88
Temp          88 80   78 83 88 80   78 83 88 80   78 83 88 80   78 83 88 80
Dewpt         77 75   75 75 77 76   76 75 76 75   76 75 77 75   75 75 76 76
PWind dir         E       E     E       E     E       E     E       E     E
Wind char        LT      LT    LT      LT    LT      LT    GN      GN    GN
Avg clouds    SC B1   CL FW SC B1   SC FW SC SC   SC SC SC B1   SC SC SC SC
PoP 12hr         60       5    60      10    40      10    50      10    30
Rain shwrs     L  L       S  L  L    S  S  C  C    S  S  C  C    S  S  C  C
Tstms          S  S          S  S          S  S          S  S

$$
PRZ010-300800-
Eugenio Maria de Hosto Airport-Mayaguez PR
18.27N  67.15W Elev. 28 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          93          77          93          78
Temp             82 80 78 81 88 92 93 88 82 80 78 79 87 92 93 88 83 80 79 78 87
Dewpt            77 77 76 74 76 78 79 77 77 76 75 74 76 77 79 78 77 76 76 75 76
RH               85 91 94 79 68 64 64 70 85 88 91 85 70 62 64 72 82 88 91 91 70
Wind dir          E  E  E  E  E SE  W NE  E  E  E  E  E  E NW NE  E  E  E  E  E
Wind spd          4  3  3  4  3  2  3  4  6  3  5  5  4  2  3  5  5  6  5  4  3
Clouds           FW CL FW CL CL CL B2 OV B1 CL CL CL FW FW B2 B2 SC SC SC SC FW
PoP 12hr                      5          70          40          60          10
QPF 12hr                   0.02        1.11        0.03        1.01        0.02
Rain shwrs                          L  L  C                 L  L  S  S  S  S
Tstms                               S  S                    S  S
Heat index       90 87    86 99107110100 90 86       98106110102 92 86       98
Max heat        100    89    99   110   107    88    98   110   109    90    98


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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      75    93      75    93      74    93      75    93
Temp          93 80   76 85 93 80   76 85 93 80   75 85 93 80   76 85 93 80
Dewpt         79 77   76 76 79 77   75 76 78 77   75 77 79 76   74 76 78 77
PWind dir         E       E     E       E     E       E     E       E     E
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC B1   CL FW SC B1   FW FW SC B1   SC FW SC B1   SC FW FW SC
PoP 12hr         60       5    60       5    50      10    50      10    50
Rain shwrs     L  L          L  L          C  C    S  S  C  C    S  S  C  C
Tstms          S  S          S  S          S  S          S  S          S  S

$$
VIZ001-300800-
CYRIL E. King Airport-St Thomas USVI
18.33N  64.97W Elev. 23 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          93          81          92          81
Temp             84 83 82 82 88 92 93 89 85 83 82 82 88 91 92 89 84 83 82 81 87
Dewpt            78 77 77 77 77 77 76 76 77 77 77 76 77 76 76 76 76 77 76 76 77
RH               82 82 85 85 70 62 58 66 77 82 85 82 70 62 60 66 77 82 82 85 72
Wind dir          E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
Wind spd         13 16 13 14 13 13 11 12 13 13 12 13 13 13 12 11 12 12 12 11 12
Clouds           SC SC SC B2 SC SC FW SC FW SC B1 SC SC SC SC SC SC SC SC SC B1
PoP 12hr                     50          30          40          20          40
QPF 12hr                   0.24        0.06        0.06        0.06        0.08
Rain shwrs        S  C  C  C  C  S     S  S  S  C  S  S  S  S  S  S  S  S  S  C
Heat index       95 92 89 90100106106100 96 92 90 89100103105100 93 92 89 87 99
Max heat         99    93   100   106   106    94   100   105   103    93    99


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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          92      82    92      82    92      82    92      82    92
Temp          92 85   83 88 92 85   83 88 92 85   83 88 92 85   83 88 92 85
Dewpt         77 77   77 77 77 77   77 77 77 77   77 77 76 76   77 77 76 77
PWind dir         E       E     E       E     E       E     E       E     E
Wind char        GN      GN    GN      GN    GN      GN    BZ      GN    GN
Avg clouds    SC SC   SC SC SC SC   SC SC SC SC   SC SC SC SC   SC SC SC B1
PoP 12hr         40      20    10      20    20      20    20      20    40
Rain shwrs     C  S    S  S  S  S    S  S  S  S    S  S  S  S    S  S  C  C

$$
VIZ002-300800-
Henry E. Rohlsen Airport-St Croix USVI
17.70N  64.80W Elev. 74 ft
503 PM AST Fri Aug 29 2025

Date           08/29/25      Sat 08/30/25            Sun 08/31/25            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          90          79          90          78
Temp             84 83 82 81 86 89 90 87 83 81 80 80 86 89 90 86 82 80 79 78 85
Dewpt            77 77 77 76 77 77 77 76 76 76 76 75 76 76 76 76 76 76 76 76 77
RH               80 82 85 85 75 68 66 70 80 85 88 85 72 66 64 72 82 88 91 94 77
Wind dir          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 13 12 12 13 11 12 11 12 12 12 13 12 12 10 10 12 10 10 12
Clouds           SC SC SC B2 SC SC SC SC CL FW CL SC SC SC SC SC SC SC SC SC B1
PoP 12hr                     50          30          30          30          40
QPF 12hr                   0.23        0.04        0.05        0.11        0.10
Rain shwrs        S  C  S  C  C  S  S  S           S  C  C  S  S  C  C  C  C  C
Heat index       93 92 89 87 97102103 98 91 87 86 85 96100102 96 89 86       96
Max heat         99    93    97   103   102    89    96   102   100    87    96


Date           09/01  Tue 09/02/25  Wed 09/03/25  Thu 09/04/25  Fri 09/05/25
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    91      79    91      79    91      79    91
Temp          90 82   79 86 91 83   80 86 91 83   80 86 91 83   80 86 91 83
Dewpt         77 76   76 76 77 76   76 77 77 76   76 76 75 75   76 77 76 76
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 SC SC   SC FW FW SC   SC SC SC SC   SC SC SC B1
PoP 12hr         40      30    10      10    20      20    30      30    40
Rain shwrs     C  C    C  C  S  S    S  S  S  S    S  S  S  C    C  C  C  C

$$