800
FNUS70 PGUM 132334
FWSGUM

Spot Forecast for SE-25-04...NMFS
National Weather Service Tiyan GU
934 AM ChST Mon Jul 14 2025

Forecast is based on forecast start time of 1000 ChST on July 14.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office by email at nws.gum.operations@noaa.gov
if you have questions or concerns with this forecast.

.DISCUSSION...The feeder bands/monsoon tail extending from Tropical
Storm Nari (06W), continue to pull away from the Mariana Islands,
leaving behind drier weather and some upper-level cloud cover.
To the east, near near 155E, a trade-wind trough is drifting
towards the northern islands, ahead of a TUTT cell west-northwest
of Wake Island. As these features near the Mariana Islands around
Tuesday, shower and thunderstorm chances will start to increase.
Continuing to watch the development of the monsoon pattern across
Palau and western Yap State as this will bring another potential
for unsettle weather, along with a building west to southwest swell
later this week as it shifts northward.

.TODAY (AGRIHAN ISLAND)...

Sky/weather.........Partly sunny (45-55 percent). Isolated showers.
Surface winds (kts).Southeast winds 13 to 17 knots.
Wave heights........5 to 7 feet.

.TONIGHT (AGRIHAN ISLAND)...

Sky/weather.........Mostly cloudy (45-55 percent). Isolated showers.
Surface winds (kts).Southeast winds 12 to 16 knots.
Wave heights........5 to 7 feet.

.TUESDAY (ALAMAGAN ISLAND)...

Sky/weather.........Mostly cloudy (50-60 percent). Scattered showers
                    and isolated thunderstorms.
Surface winds (kts).Southeast winds 11 to 15 knots.
Wave heights........5 to 7 feet.

$$
Forecaster...JS
Requested by...Benjamin Richards
Type of request...MARINE
.TAG 2517926.0/GUM
.DELDT 07/14/25
.FormatterVersion 2.0.0
.EMAIL benjamin.richards@noaa.gov,nws.gum.operations@noaa.gov,co.sette@noaa.gov,eva.schemmel@noaa.gov,ops.sette@noaa.gov