Point Forecast Matrices
Issued by NWS Tiyan, Guam

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FOMY50 PGUM 100550
PFMGUM

POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE TIYAN GU
340 PM CHST FRI OCT 10 2025

GUZ001-101800-
GUAM INTERNATIONAL AIRPORT-TIYAN GU
13.48N 144.79E ELEV. 248 FT
340 PM CHST FRI OCT 10 2025

DATE          FRI 10/10/25      SAT 10/11/25            SUN 10/12/25         MON
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          89          76          89          76
TEMP             85 82 79 78 77 77 84 89 88 85 82 79 77 77 84 89 88 85 82 79 77
DEWPT            78 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 78
RH               80 85 94 97100100 80 68 70 77 85 94100100 80 68 70 80 88 97103
WIND DIR          E  E  E  E  E  E  E  E  E  E  E NE NE NE  E NE NE  E  E  E  E
WIND SPD          4  4  5  5  5  5  5  4  4  4  5  5  5  6  9  8  8  9  9  6  5
CLOUDS           B1 SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC SC SC
POP 12HR                     30          20          20          20          20
QPF 12HR                   0.07        0.05        0.02        0.10        0.10
RAIN SHWRS        C  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
TSTMS             S  S  S  S  S  S  S  S  S
HEAT INDEX       96 90 84          93101100 96 90          94102101 97 91
MAX HEAT         98    94          93   101    99    88    94   102   100    89


DATE           10/13/25  TUE 10/14/25  WED 10/15/25  THU 10/16/25  FRI 10/17/25
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          89      76    87      76    87      76    87      76    89
TEMP          84 88 82   77 83 86 81   77 83 86 81   77 83 86 81   77 84 88
DEWPT         78 78 78   78 78 78 79   78 78 78 79   79 79 79 79   79 79 79
PWIND DIR         E       E     E       E     E       E    SE       E     E
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      LT    GN
AVG CLOUDS    B1 B1 B1   SC B1 B1 B1   B1 B1 B1 B2   B2 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    20      30    40      40    40      30    30
RAIN SHWRS     C  C  C    S  S  S  C    C  C  C  C    C  C  C  C    C  C  S
TSTMS                        S  S  S    S  S  S  S    S  S  S  S

$$
MPZ001-101800-
ROTA INTERNATIONAL AIRPORT-SINAPALU MP
14.17N 145.23E ELEV. 592 FT
340 PM CHST FRI OCT 10 2025

DATE          FRI 10/10/25      SAT 10/11/25            SUN 10/12/25         MON
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          88          75          88          75
TEMP             83 81 78 76 75 76 83 87 87 84 81 78 76 76 83 87 87 84 81 78 76
DEWPT            78 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 78
RH               85 88 97103107103 82 72 72 80 88 97103103 82 72 72 82 91100107
WIND DIR          E  E  E  E  E  E  E  E  E  E  E  E NE  E  E  E NE  E  E  E  E
WIND SPD          2  4  6  6  6  6  6  5  4  5  6  6  6  9 10  9  6  8  9  8  6
CLOUDS           B1 SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     20          20          20          20          20
QPF 12HR                   0.15        0.09        0.02        0.09        0.09
RAIN SHWRS        S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
TSTMS             S  S  S  S  S
HEAT INDEX       94 87             91 99 98 94 88          91100 99 95 89
MAX HEAT         95    92          91    99    97    85    91   100    98    85


DATE           10/13/25  TUE 10/14/25  WED 10/15/25  THU 10/16/25  FRI 10/17/25
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    85      75    85      75    85      75    87
TEMP          82 86 81   76 81 84 80   76 81 84 80   76 81 84 80   76 82 87
DEWPT         78 78 78   78 78 78 79   78 79 79 79   79 79 79 79   79 79 79
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 B1   SC B1 B1 B1   B1 B1 B1 B2   B2 B1 B1 B1   B1 B1 B1
POP 12HR         20      20    20      30    40      40    40      30    30
RAIN SHWRS     S  S  S    S  S  S  C    C  C  C  C    C  C  C  C    C  C  S
TSTMS                        S  S  S    S  S  S  S    S  S  S  S

$$
MPZ002-101800-
TINIAN-SAN JOSE MP
14.97N 145.63E ELEV. 74 FT
340 PM CHST FRI OCT 10 2025

DATE          FRI 10/10/25      SAT 10/11/25            SUN 10/12/25         MON
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          90          78          90          78
TEMP             86 83 81 79 78 79 85 90 89 87 83 80 79 79 85 90 89 87 83 80 79
DEWPT            77 76 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 78
RH               75 80 88 94 97 94 77 66 68 72 82 91 94 94 77 66 68 75 85 94 97
WIND DIR          E  E  E  E  E  E  E  E  E  E  E  E NE NE NE  E  E  E  E  E  E
WIND SPD          4  5  8  6  6  8  9  6  5  5  6  6  8 10 11 10  8  9  9  8  8
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC
POP 12HR                     30          20          20          20          20
QPF 12HR                   0.25        0.12        0.03        0.06        0.07
RAIN SHWRS        C  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
TSTMS             S  S  S  S  S
HEAT INDEX       97 92 88 84    83 95102101 98 93 88    84 96102101 99 94 88
MAX HEAT         99    96    87    95   102   100    91    96   102   101    92


DATE           10/13/25  TUE 10/14/25  WED 10/15/25  THU 10/16/25  FRI 10/17/25
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          89      78    88      78    88      78    88      78    89
TEMP          85 88 83   79 84 87 83   79 84 87 83   79 84 87 83   79 85 88
DEWPT         78 78 78   78 78 78 79   78 78 78 79   79 79 79 79   79 79 79
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 B1   SC SC SC B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         20      20    20      30    40      40    40      30    30
RAIN SHWRS     S  S  S    S  S  S  C    C  C  C  C    C  C  C  C    S  C  C
TSTMS                              S    S  S  S  S    S  S

$$
MPZ003-101800-
SAIPAN INTERNATIONAL AIRPORT-OBYAN MP
15.11N 145.72E ELEV. 215 FT
340 PM CHST FRI OCT 10 2025

DATE          FRI 10/10/25      SAT 10/11/25            SUN 10/12/25         MON
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          90          78          90          78
TEMP             86 83 81 79 78 79 85 90 89 86 83 80 78 79 85 90 89 86 83 80 78
DEWPT            78 76 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 78 78 78 78
RH               77 80 88 94 97 94 77 66 68 75 82 91 97 94 77 66 68 77 85 94100
WIND DIR          E  E  E  E  E  E  E  E  E  E  E  E NE NE NE  E  E  E  E  E  E
WIND SPD          4  5  8  6  6  8  9  8  5  5  6  6  8 10 11 10  9  9  9  8  8
CLOUDS           B1 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     30          20          20          20          20
QPF 12HR                   0.08        0.03        0.02        0.05        0.06
RAIN SHWRS        C  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
TSTMS             S
HEAT INDEX       97 91 88          95102101 98 93 87       96103102 99 93 88
MAX HEAT         99    96    87    95   102   100    91    96   103   101    91


DATE           10/13/25  TUE 10/14/25  WED 10/15/25  THU 10/16/25  FRI 10/17/25
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          89      78    88      78    88      78    88      78    89
TEMP          84 88 83   78 84 87 83   78 84 87 83   78 84 87 83   78 84 88
DEWPT         78 78 78   78 78 78 79   78 78 79 79   79 79 79 79   79 79 79
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 B1   SC SC SC B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         20      20    20      30    40      40    40      30    20
RAIN SHWRS     S  S  S    S  S  S  C    C  C  C  C    C  C  C  C    S  S  S
TSTMS                              S    S  S  S  S    S  S

$$