Point Forecast Matrices
Issued by NWS Tiyan, Guam

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POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE TIYAN GU
301 PM CHST SUN AUG 24 2025

GUZ001-241800-
GUAM INTERNATIONAL AIRPORT-TIYAN GU
13.48N 144.79E ELEV. 248 FT
301 PM CHST SUN AUG 24 2025

DATE          SUN 08/24/25      MON 08/25/25            TUE 08/26/25         WED
CHST3HRLY     13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04
UTC 3HRLY     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18

MIN/MAX                      77          89          77          88          77
TEMP             85 84 81 79 78 78 84 89 88 86 82 79 78 78 83 87 87 85 82 79 78
DEWPT            78 78 78 78 78 78 78 77 77 78 78 78 78 78 78 78 78 78 79 79 78
RH               80 82 91 97100100 82 68 70 77 88 97100100 85 75 75 80 91100100
WIND DIR          E  E  E  E  E  E  E NE NE NE NE NE  E  E  E  E SE SE SE SE SE
WIND SPD          9  8  6  5  4  4  5  5  8  9  8  6  9  9 10 11 11 12 11  9  8
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     30          30          20          30          30
QPF 12HR                   0.11        0.05        0.14        0.10        0.36
RAIN SHWRS        C  C  C  C  C  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS             S  S  S  S  S  S  S  S  S              S  S  S  S  S  S  S  S
HEAT INDEX       97 94 90          94102101 97 92 85       93100100 96 91 84
MAX HEAT         98    96    88    94   102   100    90    93   100    99    90


DATE           08/27/25  THU 08/28/25  FRI 08/29/25  SAT 08/30/25  SUN 08/31/25
CHST6HRLY     10 16 22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     00 06 12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MAX/MIN          88      77    88      77    88      77    88      77    88
TEMP          83 87 82   78 83 87 82   78 83 87 82   78 83 87 82   78 83 87
DEWPT         78 78 79   78 78 78 79   79 79 79 79   79 79 78 79   78 78 78
PWIND DIR        SE      SE     E       E     E       E     E      SE    SE
WIND CHAR        GN      GN    GN      LT    GN      GN    GN      LT    LT
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    30      30    30      30    30      30    30
RAIN SHWRS     C  C  C    C  C  S  C    C  C  C  C    S  C  C  C    C  C  C
TSTMS          S  S  S    S  S  S  S    S  S  S  S    S  S  S  S    S  S  S

$$
MPZ001-241800-
ROTA INTERNATIONAL AIRPORT-SINAPALU MP
14.17N 145.23E ELEV. 592 FT
301 PM CHST SUN AUG 24 2025

DATE          SUN 08/24/25      MON 08/25/25            TUE 08/26/25         WED
CHST3HRLY     13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04
UTC 3HRLY     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18

MIN/MAX                      76          87          76          86          76
TEMP             85 83 80 78 76 77 82 87 86 84 81 78 76 77 82 86 85 83 80 78 76
DEWPT            78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 79 78
RH               80 85 94100107103 88 75 77 82 91100107103 88 77 80 85 97103107
WIND DIR          E  E  E  E  E  E  E NE NE NE NE  E  E  E  E  E SE SE SE SE SE
WIND SPD          8 10  9  6  5  5  6  5  8 10 10 10 13 10 12 12 13 13 12 10  9
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     30          30          20          30          30
QPF 12HR                   0.16        0.08        0.12        0.05        0.36
RAIN SHWRS        C  C  C  C  C  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS             S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       96 92 86          91 99 98 94 89          91 98 97 93 88
MAX HEAT         97    95    84    91    99    97    85    91    98    96    84


DATE           08/27/25  THU 08/28/25  FRI 08/29/25  SAT 08/30/25  SUN 08/31/25
CHST6HRLY     10 16 22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     00 06 12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MAX/MIN          85      76    85      76    85      76    85      76    85
TEMP          81 85 80   76 81 85 80   76 81 85 80   76 81 85 80   76 81 85
DEWPT         79 79 79   78 78 79 79   79 79 79 79   79 79 79 79   78 78 78
PWIND DIR        SE       E     E       E     E       E     E      SE    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      LT    LT
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    30      30    30      30    30      30    30
RAIN SHWRS     C  C  C    C  C  S  C    C  C  C  C    S  C  C  C    C  C  C
TSTMS          S  S  S    S  S  S  S    S  S  S  S    S  S  S  S    S  S  S

$$
MPZ002-241800-
TINIAN-SAN JOSE MP
14.97N 145.63E ELEV. 74 FT
301 PM CHST SUN AUG 24 2025

DATE          SUN 08/24/25      MON 08/25/25            TUE 08/26/25         WED
CHST3HRLY     13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04
UTC 3HRLY     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18

MIN/MAX                      77          89          77          88          77
TEMP             86 84 81 79 78 78 84 88 88 85 82 79 78 78 83 87 87 85 82 79 78
DEWPT            78 78 78 78 78 78 78 78 78 78 79 79 78 78 78 78 78 78 79 79 78
RH               77 82 91 97100100 82 72 72 80 91100100100 85 75 75 80 91100100
WIND DIR          E  E  E  E  E  E  E NE NE NE NE  E SE  E  E SE SE  E  E  E  E
WIND SPD          9 11  8  6  6  6  6  6  8 11 11 12 16 11 13 13 14 14 12 11 10
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     30          30          20          30          30
QPF 12HR                   0.22        0.12        0.11        0.04        0.31
RAIN SHWRS        C  C  C  C  C  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS             S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       98 95 90          94102101 97 92 85       93101100 96 92 84
MAX HEAT         98    97    89    94   102   100    90    93   101    99    90


DATE           08/27/25  THU 08/28/25  FRI 08/29/25  SAT 08/30/25  SUN 08/31/25
CHST6HRLY     10 16 22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     00 06 12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MAX/MIN          87      77    87      77    87      77    87      77    87
TEMP          83 86 81   78 83 86 81   78 83 86 81   78 83 86 81   78 83 86
DEWPT         79 78 79   79 79 79 79   79 79 79 79   79 79 79 79   78 78 78
PWIND DIR        SE       E     E       E     E       E     E       E    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      LT    LT
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    20      30    30      20    20      30    30
RAIN SHWRS     C  C  C    S  S  S  C    C  C  S  S    S  S  S  C    C  C  C
TSTMS          S  S  S    S  S  S  S    S  S  S  S    S  S  S  S    S  S  S

$$
MPZ003-241800-
SAIPAN INTERNATIONAL AIRPORT-OBYAN MP
15.11N 145.72E ELEV. 215 FT
301 PM CHST SUN AUG 24 2025

DATE          SUN 08/24/25      MON 08/25/25            TUE 08/26/25         WED
CHST3HRLY     13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04
UTC 3HRLY     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18

MIN/MAX                      77          88          77          88          77
TEMP             85 84 81 79 78 78 84 88 88 85 82 79 78 78 83 87 87 85 82 79 78
DEWPT            78 78 78 78 78 78 78 78 78 78 79 79 78 78 78 78 78 78 79 79 78
RH               80 82 91 97100100 82 72 72 80 91100100100 85 75 75 80 91100100
WIND DIR          E  E  E  E  E  E  E  E NE NE NE  E SE  E  E SE SE  E  E  E  E
WIND SPD          9 11  8  6  6  6  6  6  8 11 11 12 14 11 13 13 13 14 12 10 10
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     30          30          20          30          30
QPF 12HR                   0.23        0.13        0.11        0.04        0.31
RAIN SHWRS        C  C  C  C  C  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS             S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       98 94 90          94102101 97 92 85       93101100 96 91 84
MAX HEAT         98    97    88    94   102   100    90    93   101    99    90


DATE           08/27/25  THU 08/28/25  FRI 08/29/25  SAT 08/30/25  SUN 08/31/25
CHST6HRLY     10 16 22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     00 06 12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MAX/MIN          87      77    87      77    87      77    87      77    87
TEMP          83 86 81   78 83 86 81   78 83 86 81   78 83 86 81   78 83 86
DEWPT         79 79 79   79 79 79 79   79 79 79 79   79 79 79 79   78 78 78
PWIND DIR        SE       E     E       E     E       E     E       E    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      LT    LT
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    20      30    30      20    20      30    30
RAIN SHWRS     C  C  C    S  S  S  C    C  C  S  S    S  S  S  C    C  C  C
TSTMS          S  S  S    S  S  S  S    S  S  S  S    S  S  S  S    S  S  S

$$