Zone Forecast Product
Issued by NWS Tiyan, Guam

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FPMY50 PGUM 170528
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
328 PM ChST Thu Jul 17 2025

GUZ001-MPZ001>003-172100-
Guam-Rota-Tinian-Saipan-
328 PM ChST Thu Jul 17 2025

.TONIGHT...Mostly cloudy with isolated showers becoming scattered
showers by midnight. Isolated thunderstorms. East winds 10 to 15
mph. Lows around 79. Chance of showers 40 percent.
.FRIDAY...Partly sunny with scattered showers and thunderstorms.
East winds 10 to 15 mph. Highs around 86. Chance of showers 30
percent.
.FRIDAY NIGHT...Partly cloudy with isolated showers and
thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of
showers 20 percent.
.SATURDAY THROUGH SUNDAY...Mostly cloudy with scattered showers and
isolated thunderstorms. Southeast winds 10 to 15 mph. Highs around
86. Lows around 78. Chance of showers 50 percent.
.SUNDAY NIGHT...Mostly cloudy with a 30 percent chance of showers
and a slight chance of thunderstorms. Lows in the upper 70s.
.MONDAY...Partly sunny with a 20 percent chance of showers and
thunderstorms. Highs in the mid 80s.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of showers
and a slight chance of thunderstorms. Lows in the upper 70s.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with a 20 percent chance
of showers and thunderstorms. Highs in the mid 80s. Lows in the
upper 70s.
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy with a 30 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the mid 80s.

$$