Point Forecast Matrices
Issued by NWS Tiyan, Guam

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FOMY50 PGUM 111820
PFMGUM

POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE TIYAN GU
411 AM CHST SUN OCT 12 2025

GUZ001-120600-
GUAM INTERNATIONAL AIRPORT-TIYAN GU
13.48N 144.79E ELEV. 248 FT
411 AM CHST SUN OCT 12 2025

DATE                SUN 10/12/25            MON 10/13/25            TUE 10/14/25
CHST3HRLY     01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16
UTC 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06

MAX/MIN                      89          76          89          76          87
TEMP                77 84 89 88 85 82 79 77 77 84 89 88 85 82 79 77 77 83 87 86
DEWPT               77 77 77 77 77 78 78 77 77 78 78 78 78 78 78 77 77 78 78 78
RH                 100 80 68 70 77 88 97100100 82 70 72 80 88 97100100 85 75 77
WIND DIR             E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E SE
WIND SPD             6 10  9  9  8  5  6  5  8 10 11 11 10  9  9  6 10 11 12 12
CLOUDS              SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2
POP 12HR                     20          20          20          30          50
QPF 12HR                   0.05        0.08        0.16        0.18        0.44
RAIN SHWRS           S  S  S  S  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS                                                                S  S  S  S
HEAT INDEX             93101100 96 91          94102101 97 91          92 99 98
MAX HEAT               93   101    99    89    94   102   100    90    92    99


DATE               WED 10/15/25  THU 10/16/25  FRI 10/17/25  SAT 10/18/25
CHST6HRLY     22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MIN/MAX            76    87      76    87      76    88      79    88
TEMP          81   77 83 86 81   77 83 86 81   77 83 87 83   79 84 87
DEWPT         78   77 78 78 79   77 79 79 80   77 79 79 79   79 79 79
PWIND DIR           E    SE       S    SE      SE     E       E     E
WIND CHAR          GN    LT      GN    GN      LT    LT      LT    GN
AVG CLOUDS    B2   B2 B2 B2 B2   B2 B1 B1 B1   B1 B1 SC B1   B1 SC SC
POP 12HR           50    50      40    40      30    20      20    20
RAIN SHWRS     C    C  C  C  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S    S  S  S  S    S  S  S  S    S  S  S  S

$$
MPZ001-120600-
ROTA INTERNATIONAL AIRPORT-SINAPALU MP
14.17N 145.23E ELEV. 592 FT
411 AM CHST SUN OCT 12 2025

DATE                SUN 10/12/25            MON 10/13/25            TUE 10/14/25
CHST3HRLY     01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16
UTC 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06

MAX/MIN                      88          75          87          75          85
TEMP                76 83 87 87 84 81 78 76 76 82 87 86 84 81 78 76 76 81 85 84
DEWPT               76 77 77 77 77 78 78 76 76 78 78 78 78 78 78 76 76 78 78 78
RH                 100 82 72 72 80 91100100100 88 75 77 82 91100100100 91 80 82
WIND DIR            NE  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD             9 11 10  9  9  8  8  6 10 11 12 12 13 11 11  9 12 14 14 14
CLOUDS              SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2
POP 12HR                     20          20          20          30          50
QPF 12HR                   0.06        0.06        0.12        0.18        0.32
RAIN SHWRS           S  S  S  S  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
TSTMS                                                                S  S  S  S
HEAT INDEX             91 99 98 94 89          92100 99 95 89          89 97 95
MAX HEAT               91    99    97    85    92   100    98    85    89    97


DATE               WED 10/15/25  THU 10/16/25  FRI 10/17/25  SAT 10/18/25
CHST6HRLY     22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MIN/MAX            75    85      75    85      75    87      79    87
TEMP          80   76 81 84 80   76 81 84 80   76 82 87 83   79 84 87
DEWPT         78   76 78 78 79   76 79 79 80   76 79 79 79   79 79 79
PWIND DIR           E    SE      SE    SE      SE     E       E     E
WIND CHAR          GN    GN      GN    GN      LT    GN      GN    GN
AVG CLOUDS    B2   B2 B2 B2 B2   B2 B2 B1 B1   B1 B1 B1 B1   B1 B1 SC
POP 12HR           50    50      50    50      30    20      20    20
RAIN SHWRS     C    C  C  C  C    C  C  C  C    S  S  S  S    S  S  S
TSTMS          S    S  S  S  S    S  S  S  S    S  S

$$
MPZ002-120600-
TINIAN-SAN JOSE MP
14.97N 145.63E ELEV. 74 FT
411 AM CHST SUN OCT 12 2025

DATE                SUN 10/12/25            MON 10/13/25            TUE 10/14/25
CHST3HRLY     01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16
UTC 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06

MAX/MIN                      89          78          89          78          88
TEMP                79 85 89 88 86 83 80 79 79 85 89 88 86 83 80 79 79 84 88 87
DEWPT               77 77 77 77 77 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
RH                  94 77 68 70 75 85 94 97 97 80 70 72 77 85 94 97 97 82 72 75
WIND DIR            NE  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD            10 11 10 11 10  9  8  8 11 12 13 12 14 12 11 10 12 14 17 16
CLOUDS              SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     20          20          20          30          40
QPF 12HR                   0.07        0.08        0.09        0.18        0.22
RAIN SHWRS           S  S  S  S  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
HEAT INDEX          84 94101100 97 93 88    84 95102101 98 93 88       95101100
MAX HEAT               94   101    99    91    95   102   100    91    95   101


DATE               WED 10/15/25  THU 10/16/25  FRI 10/17/25  SAT 10/18/25
CHST6HRLY     22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MIN/MAX            78    88      78    88      78    88      79    88
TEMP          83   79 84 87 83   79 84 87 83   79 84 87 83   80 84 87
DEWPT         78   78 78 78 79   79 79 79 80   79 79 79 79   79 79 79
PWIND DIR           E     E      SE    SE       E     E       E     E
WIND CHAR          GN    GN      GN    GN      GN    GN      GN    GN
AVG CLOUDS    B2   B2 OV OV OV   OV B2 B1 B1   B1 B1 B1 B1   B1 B1 SC
POP 12HR           50    60      60    60      30    30      20    20
RAIN SHWRS     C    C  L  L  L    L  L  C  C    C  C  S  S    S  S  S
TSTMS          S    S  S  S  S    S  S  S  S    S  S

$$
MPZ003-120600-
SAIPAN INTERNATIONAL AIRPORT-OBYAN MP
15.11N 145.72E ELEV. 215 FT
411 AM CHST SUN OCT 12 2025

DATE                SUN 10/12/25            MON 10/13/25            TUE 10/14/25
CHST3HRLY     01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16
UTC 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06

MAX/MIN                      89          78          89          78          88
TEMP                79 84 89 88 86 83 80 78 79 84 89 88 86 83 80 78 79 84 88 87
DEWPT               77 77 77 77 77 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
RH                  94 80 68 70 75 85 94100 97 82 70 72 77 85 94100 97 82 72 75
WIND DIR            NE  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD             9 11 10 11 10  9  8  8 11 11 13 12 13 12 11 10 12 14 17 14
CLOUDS              SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR                     20          20          20          30          30
QPF 12HR                   0.07        0.06        0.09        0.18        0.21
RAIN SHWRS           S  S  S  S  S  S  S  S  S  S  S  S  C  C  C  C  C  C  C  C
HEAT INDEX             95101101 97 92 87       95102101 98 93 87       94101100
MAX HEAT               95   101   100    91    95   102   101    91    94   101


DATE               WED 10/15/25  THU 10/16/25  FRI 10/17/25  SAT 10/18/25
CHST6HRLY     22   04 10 16 22   04 10 16 22   04 10 16 22   04 10 16
UTC 6HRLY     12   18 00 06 12   18 00 06 12   18 00 06 12   18 00 06

MIN/MAX            78    88      78    88      78    88      79    88
TEMP          82   78 84 87 82   78 84 87 82   78 84 87 83   80 84 87
DEWPT         78   78 78 78 79   78 79 79 80   78 79 79 79   79 79 79
PWIND DIR           E     E      SE    SE       E     E       E     E
WIND CHAR          GN    GN      GN    GN      GN    GN      GN    GN
AVG CLOUDS    B2   B2 OV OV OV   OV B2 B1 B1   B1 B1 B1 B1   B1 B1 SC
POP 12HR           50    60      60    60      30    30      20    20
RAIN SHWRS     C    C  L  L  L    L  L  C  C    C  C  S  S    S  S  S
TSTMS          S    S  S  S  S    S  S  S  S    S  S

$$