Point Forecast Matrices
Issued by NWS Tiyan, Guam

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001
FOMY50 PGUM 050610
PFMGUM

POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE TIYAN GU
400 PM CHST SUN OCT 5 2025

GUZ001-051800-
GUAM INTERNATIONAL AIRPORT-TIYAN GU
13.48N 144.79E ELEV. 248 FT
400 PM CHST SUN OCT 5 2025

DATE          SUN 10/05/25      MON 10/06/25            TUE 10/07/25         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 82 80 78 77 77 83 87 86 84 81 78 77 77 82 86 85 83 81 78 77
DEWPT            75 75 76 76 76 75 75 75 75 76 76 76 76 76 76 76 76 77 77 77 77
RH               72 79 88 94 97 94 77 68 70 77 85 94 97 97 82 72 75 82 88 97100
WIND DIR          W SW  S  S  S  S SE SW  W  N NE NE NE NW SW  S  S  S  S  S  S
WIND SPD          2  2  2  2  2  3  4  3  2  1  1  1  1  1  3  6 11 11 10  8  5
CLOUDS           B1 B1 B1 B1 B1 SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR                     30          30          40          60          60
QPF 12HR                   0.19        0.35        0.25        0.44        0.46
RAIN SHWRS        S  S  S  C  C  S  S  C  C  C  C  C  C  L  L  L  L  C  C  C  C
TSTMS             S        S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       93 89 84          90 96 95 92 88          89 96 95 92 87
MAX HEAT         93    92          90    96    95    86    89    96    94    85


DATE           10/08/25  THU 10/09/25  FRI 10/10/25  SAT 10/11/25  SUN 10/12/25
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      76    88      76    87      76    89      76    89
TEMP          83 87 82   77 83 87 82   77 83 86 81   77 84 88 82   77 84 88
DEWPT         76 76 77   77 77 77 77   77 77 76 77   76 76 76 77   76 77 76
PWIND DIR         S      SE    NE      NE    NE      NE     E       E     E
WIND CHAR        LT      LT    LT      LT    LT      LT    LT      LT    LT
AVG CLOUDS    B1 B1 SC   SC SC SC B1   B1 B1 B1 SC   SC SC SC SC   SC SC SC
POP 12HR         50      20    20      30    30      30    20      20    20
RAIN SHWRS     C  S  S    S  S  S  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S  S  S             S    S  S

$$
MPZ001-051800-
ROTA INTERNATIONAL AIRPORT-SINAPALU MP
14.17N 145.23E ELEV. 592 FT
400 PM CHST SUN OCT 5 2025

DATE          SUN 10/05/25      MON 10/06/25            TUE 10/07/25         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                      75          86          75          85          75
TEMP             84 81 78 76 75 76 82 86 85 83 80 77 76 76 81 85 84 82 80 77 76
DEWPT            75 75 75 75 75 75 75 75 75 75 76 76 76 76 76 76 76 76 76 76 76
RH               74 82 91 97100 97 79 70 72 77 88 97100100 85 75 77 82 88 97100
WIND DIR          N  W  S  S  S  S SE SE SE  E  E  E  E  E SE SE SE  S  S  S  S
WIND SPD          1  2  3  3  2  4  5  5  4  4  5  6 10 14 18 19 18 16 13 11  9
CLOUDS           B1 B1 B1 B1 B1 SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR                     30          30          40          60          60
QPF 12HR                   0.17        0.11        0.26        0.45        0.50
RAIN SHWRS        S  S  S  C  C  S  S  C  C  C  C  C  C  L  L  L  L  C  C  C  C
TSTMS             S        S  S              S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       91 86             88 94 94 90 85          87 94 93 90 84
MAX HEAT         91    89          88    94    93          87    94    92


DATE           10/08/25  THU 10/09/25  FRI 10/10/25  SAT 10/11/25  SUN 10/12/25
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      75    87      75    86      75    88      75    88
TEMP          82 86 81   76 82 86 81   76 81 85 80   76 83 87 81   76 83 87
DEWPT         76 76 77   76 76 76 77   76 76 76 76   76 76 76 76   76 76 76
PWIND DIR         S       E    NE      NE    NE       E     E       E     E
WIND CHAR        GN      LT    LT      LT    LT      LT    LT      GN    GN
AVG CLOUDS    B1 SC SC   SC SC SC B1   B1 B1 B1 SC   SC SC SC SC   SC SC SC
POP 12HR         50      20    20      30    30      30    20      20    20
RAIN SHWRS     C  S  S    S  S  S  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S  S  S             S    S  S

$$
MPZ002-051800-
TINIAN-SAN JOSE MP
14.97N 145.63E ELEV. 74 FT
400 PM CHST SUN OCT 5 2025

DATE          SUN 10/05/25      MON 10/06/25            TUE 10/07/25         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                      78          88          78          87          78
TEMP             85 82 81 79 78 79 84 88 87 85 83 80 79 79 83 87 86 84 82 80 79
DEWPT            75 75 76 75 75 76 76 76 76 76 77 76 76 77 77 77 77 77 77 76 76
RH               72 79 85 88 91 91 77 68 70 75 82 88 91 94 82 72 75 80 85 88 91
WIND DIR          E  E  E  E SE SE SE SE SE SE SE  E  E  E SE SE SE SE SE  S  S
WIND SPD          2  4  5  5  4  5  8  6  6  8 10 11 12 17 20 20 19 18 17 12  8
CLOUDS           SC B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR                     30          30          40          50          50
QPF 12HR                   0.17        0.09        0.25        0.45        0.34
RAIN SHWRS        S  S  S  C  C  S  S  S  S  C  C  C  C  C  C  C  C  C  C  C  C
TSTMS             S        S  S              S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       93 89 86 83       93 99 98 95 91 86       93 98 97 94 90 85
MAX HEAT         93    92    85    93    99    97    89    93    98    96    88


DATE           10/08/25  THU 10/09/25  FRI 10/10/25  SAT 10/11/25  SUN 10/12/25
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      78    88      78    88      78    90      78    90
TEMP          84 87 83   79 84 87 83   79 84 87 83   79 85 89 83   79 85 89
DEWPT         77 77 77   77 77 77 77   77 77 77 77   76 77 76 77   76 77 77
PWIND DIR         S       E    NE      NE    NE       E     E       E     E
WIND CHAR        GN      LT    LT      LT    GN      LT    LT      LT    GN
AVG CLOUDS    B1 B1 SC   SC SC SC B1   B1 B1 B1 B1   SC SC SC SC   SC SC SC
POP 12HR         50      20    20      30    30      30    20      20    20
RAIN SHWRS     C  S  S    S  S  S  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S  S  S             S    S  S

$$
MPZ003-051800-
SAIPAN INTERNATIONAL AIRPORT-OBYAN MP
15.11N 145.72E ELEV. 215 FT
400 PM CHST SUN OCT 5 2025

DATE          SUN 10/05/25      MON 10/06/25            TUE 10/07/25         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                      78          88          78          87          78
TEMP             86 83 81 79 78 79 84 88 87 85 82 80 78 79 83 87 86 84 82 80 78
DEWPT            76 76 76 76 76 76 77 77 76 77 77 77 77 77 77 77 77 77 77 77 77
RH               72 80 85 91 94 91 80 70 70 77 85 91 97 94 82 72 75 80 85 91 97
WIND DIR          E  E  E SE SE SE SE SE SE SE SE SE  E  E SE SE SE SE SE  S  S
WIND SPD          2  4  5  5  4  6  8  9  9  9  9 10 12 17 20 20 19 18 17 12  9
CLOUDS           SC B1 B1 B1 B1 SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR                     30          30          40          50          50
QPF 12HR                   0.18        0.08        0.26        0.45        0.33
RAIN SHWRS        S  S  S  C  C  S  S  C  C  C  C  C  C  C  C  C  C  C  C  C  C
TSTMS             S        S  S              S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX       95 91 87          93 99 98 95 91 85       93 99 98 95 90 85
MAX HEAT         95    94    86    93    99    97    89    93    99    97    88


DATE           10/08/25  THU 10/09/25  FRI 10/10/25  SAT 10/11/25  SUN 10/12/25
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      78    88      78    88      78    90      78    90
TEMP          84 87 82   78 84 87 82   78 84 87 82   78 85 89 83   78 85 89
DEWPT         77 77 77   77 78 78 78   77 78 77 77   77 77 77 77   77 77 77
PWIND DIR         S       E    NE      NE    NE       E     E       E     E
WIND CHAR        GN      LT    LT      LT    GN      LT    LT      LT    GN
AVG CLOUDS    B1 B1 SC   SC SC SC B1   B1 B1 B1 B1   SC SC SC SC   SC SC SC
POP 12HR         50      20    20      30    30      30    20      20    20
RAIN SHWRS     C  S  S    S  S  S  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S  S  S             S    S  S

$$