Zone Forecast Product
Issued by NWS Tiyan, Guam

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FPMY50 PGUM 212113 AAA
ZFPGUM

Zone Forecast for Guam and the Northern Marianas...UPDATED
National Weather Service Tiyan GU
713 AM ChST Tue Sep 22 2026

GUZ001-220815-
Guam-
713 AM ChST Tue Sep 22 2026

...FLASH FLOOD WATCH HAS BEEN CANCELLED...

.REST OF TODAY...Mostly cloudy with scattered showers and isolated
thunderstorms. Southeast winds 15 to 20 mph. Highs around 87. Chance
of showers 50 percent.
.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. South winds 10 to 15 mph. Lows around 77. Chance of
showers 50 percent.
.WEDNESDAY...Mostly cloudy with scattered showers and isolated
thunderstorms. South winds 10 to 15 mph. Highs around 86. Chance of
showers 50 percent.
.WEDNESDAY NIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. Southwest winds 10 to 15 mph. Lows around 77. Chance
of showers 40 percent.
.THURSDAY...Partly sunny. Scattered showers and isolated
thunderstorms in the morning, then a 40 percent chance of showers
and a slight chance of thunderstorms in the afternoon. Southwest
winds 10 to 15 mph. Highs around 86.
.THURSDAY NIGHT THROUGH MONDAY...Mostly cloudy with a chance of
showers and a slight chance of thunderstorms. Lows in the upper 70s.
Highs in the mid 80s. Chance of showers 30 percent.

$$

MPZ001>003-220815-
Rota-Tinian-Saipan-
713 AM ChST Tue Sep 22 2026

.REST OF TODAY...Mostly cloudy with scattered showers and isolated
thunderstorms. Southeast winds 10 to 15 mph. Highs around 88. Chance
of showers 50 percent.
.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. Southeast winds 10 to 15 mph. Lows around 79. Chance
of showers 50 percent.
.WEDNESDAY...Mostly cloudy with scattered showers and isolated
thunderstorms. South winds 10 to 15 mph. Highs around 87. Chance of
showers 50 percent.
.WEDNESDAY NIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. Light and variable winds. Lows around 79. Chance of
showers 40 percent.
.THURSDAY...Partly sunny. Scattered showers and isolated
thunderstorms in the morning, then a 40 percent chance of showers
and a slight chance of thunderstorms in the afternoon. Light and
variable winds. Highs around 87.
.THURSDAY NIGHT...Mostly cloudy with a 30 percent chance of showers.
Lows in the upper 70s.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A 30 percent chance of
showers and a slight chance of thunderstorms. Highs in the upper
80s. Lows in the upper 70s.
.SATURDAY THROUGH SUNDAY...Mostly cloudy with a 30 percent chance of
showers. Highs in the upper 80s. Lows around 80.
.SUNDAY NIGHT AND MONDAY...Mostly cloudy. A chance of showers and a
slight chance of thunderstorms. Lows around 80. Highs in the upper
80s. Chance of showers 30 percent.

$$