Point Forecast Matrices
Issued by NWS Tiyan, Guam

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FOMY50 PGUM 150640
PFMGUM

POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE TIYAN GU
436 PM CHST WED OCT 15 2025

GUZ001-151800-
GUAM INTERNATIONAL AIRPORT-TIYAN GU
13.48N 144.79E ELEV. 248 FT
436 PM CHST WED OCT 15 2025

DATE          WED 10/15/25      THU 10/16/25            FRI 10/17/25         SAT
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          78          88          78
TEMP                83 81 78 77 77 83 87 86 84 82 80 79 79 84 88 87 85 83 80 79
DEWPT               77 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79
RH                  82 91100103103 85 75 77 85 91 97100100 82 72 75 82 88 97100
WIND DIR             E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD            16 14  8  6 11 16 11 10  9  9  9  9 12 14 13 12 12 11  9  9
CLOUDS              B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     70          60          20          20          20
QPF 12HR                   1.01        0.27        0.14        0.09        0.06
RAIN SHWRS           L  L  L  L  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  S  S  S
HEAT INDEX          93 88          92 99 99 96 92 86       95101100 98 94 89
MAX HEAT         96    96    85    92   100    98    91    95   101   100    92


DATE           10/18/25  SUN 10/19/25  MON 10/20/25  TUE 10/21/25  WED 10/22/25
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    87      78    88      80    88
TEMP          84 87 83   79 84 87 82   79 83 86 82   79 84 87 84   81 85 87
DEWPT         79 79 80   79 79 79 79   79 79 78 79   79 78 78 79   79 79 79
PWIND DIR         E       E     E       E     E       E    SE      SE    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      GN    GN
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    40
RAIN SHWRS     C  C  C    S  C  C  C    S  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  S

$$
MPZ001-151800-
ROTA INTERNATIONAL AIRPORT-SINAPALU MP
14.17N 145.23E ELEV. 592 FT
436 PM CHST WED OCT 15 2025

DATE          WED 10/15/25      THU 10/16/25            FRI 10/17/25         SAT
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          86          78          86          78
TEMP                83 81 78 77 77 82 86 85 84 82 80 78 79 83 86 85 84 82 80 78
DEWPT               77 78 78 78 78 78 78 78 79 79 79 79 79 79 78 78 79 79 79 79
RH                  82 91100103103 88 77 80 85 91 97103100 88 77 80 85 91 97103
WIND DIR             E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD            16 13 10 10 13 16 13 12 11 10 11 11 13 16 13 13 13 11 10  9
CLOUDS              B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     70          60          20          20          20
QPF 12HR                   0.84        0.34        0.16        0.09        0.05
RAIN SHWRS           L  L  L  L  C  C  C  C  S  S  S  S  S  S  S  S  S  S  S  S
TSTMS                S  S  S  S  S  S  S  S  S  S  S  S
HEAT INDEX          93 88          91 98 98 95 91 86       93 98 98 95 92 86
MAX HEAT         96    96    85    91    98    97    90    93    98    97    90


DATE           10/18/25  SUN 10/19/25  MON 10/20/25  TUE 10/21/25  WED 10/22/25
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          86      78    86      78    86      78    86      82    86
TEMP          83 85 82   78 83 85 82   78 83 85 82   78 83 86 84   82 84 85
DEWPT         79 79 80   79 79 79 79   79 78 79 79   79 79 78 79   79 79 79
PWIND DIR         E       E     E       E     E       E     E      SE    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      GN    GN
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   SC B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         30      30    20      20    30      30    30      30    40
RAIN SHWRS     C  C  C    S  S  S  S    S  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  S

$$
MPZ002-151800-
TINIAN-SAN JOSE MP
14.97N 145.63E ELEV. 74 FT
436 PM CHST WED OCT 15 2025

DATE          WED 10/15/25      THU 10/16/25            FRI 10/17/25         SAT
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          87          78          87          78
TEMP                84 82 80 78 79 83 87 86 84 82 80 79 79 84 87 87 85 82 80 79
DEWPT               78 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79
RH                  82 88 94100 97 85 75 77 85 91 97100100 82 75 75 82 91 97100
WIND DIR            NE  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD            13 11 12  8  9 14 14 16 14 12 10 10 13 16 13 13 13 11 10 10
CLOUDS              B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     50          40          20          20          20
QPF 12HR                   0.56        0.20        0.13        0.07        0.08
RAIN SHWRS           C  C  C  C  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  S  S  S
WIND CHILL         -120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120
MIN CHILL      -120  -120  -120  -120  -120  -120  -120  -120  -120  -120  -120


DATE           10/18/25  SUN 10/19/25  MON 10/20/25  TUE 10/21/25  WED 10/22/25
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      78    87      78    87      78    87      80    86
TEMP          83 86 82   79 83 86 82   79 83 86 82   79 83 86 83   81 84 85
DEWPT         79 79 79   79 79 79 79   79 78 78 79   79 79 78 79   79 78 78
PWIND DIR         E       E     E       E     E       E     E      SE    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      GN    GN
AVG CLOUDS    B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         20      20    20      20    30      30    30      30    40
RAIN SHWRS     S  S  S    S  S  S  S    S  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

$$
MPZ003-151800-
SAIPAN INTERNATIONAL AIRPORT-OBYAN MP
15.11N 145.72E ELEV. 215 FT
436 PM CHST WED OCT 15 2025

DATE          WED 10/15/25      THU 10/16/25            FRI 10/17/25         SAT
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          88          78
TEMP                85 82 80 79 79 84 88 87 85 83 80 79 79 84 88 87 85 83 80 79
DEWPT               78 78 78 78 78 78 78 78 79 79 79 79 79 78 78 78 79 79 79 79
RH                  80 88 94 97 97 82 72 75 82 88 97100100 82 72 75 82 88 97100
WIND DIR            NE  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E  E
WIND SPD            12 11 11  8 10 13 14 14 14 12 11 10 13 16 13 13 13 11 10 10
CLOUDS              B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC
POP 12HR                     50          40          20          20          20
QPF 12HR                   0.50        0.18        0.12        0.07        0.09
RAIN SHWRS           C  C  C  C  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  S  S  S
WIND CHILL         -120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120-120
MIN CHILL      -120  -120  -120  -120  -120  -120  -120  -120  -120  -120  -120


DATE           10/18/25  SUN 10/19/25  MON 10/20/25  TUE 10/21/25  WED 10/22/25
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    88      80    86
TEMP          84 87 83   79 84 87 83   79 84 87 83   79 84 87 84   81 84 85
DEWPT         79 79 79   79 79 79 79   79 79 78 79   79 79 78 79   79 78 78
PWIND DIR         E       E     E       E     E       E     E      SE    SE
WIND CHAR        GN      GN    GN      GN    GN      GN    GN      GN    GN
AVG CLOUDS    SC B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1 B1   B1 B1 B1
POP 12HR         20      20    20      20    30      30    30      30    40
RAIN SHWRS     S  S  S    S  S  S  S    S  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

$$