571
WWMY80 PGUM 040737
SPSGUM

Special Weather Statement
National Weather Service Tiyan GU
537 PM ChST Tue Nov 4 2025

GUZ001-MPZ001>003-050745-
Guam-Rota-Tinian-Saipan-
537 PM ChST Tue Nov 4 2025

...DEVELOPING CIRCULATION TO MOVE TOWARDS THE SOUTHERN MARIANAS
WEDNESDAY AFTERNOON THROUGH THURSDAY NIGHT...
...HEAVY SHOWERS, GUSTY WINDS, AND CHOPPY SEAS EXPECTED...

Overview:
A low-level circulation (Invest 90W) is now centered near 9N143E
remains the subject of a Tropical Cyclone Formation Alert from the
Joint Typhoon Warning Center. This means the formation of a tropical
cyclone is likely within the next 24 hours. This system is expected
to move northwest before turning west-northwest near or south of the
Marianas.

Winds:
Increasingly gusty easterly winds will become southeasterly Wednesday
night into Thursday with sustained winds of 20 to 30 mph, with gusts
to 40 mph possible. Further increases in the wind fields could be
possible if 90W were to track further north closer to the Marianas.

Rainfall:
Periods of heavy rainfall with 4 to 8 inches of accumulation is
possible through Friday. This could lead to an increased risk of
mudslides across steeper terrain.

Seas:
Seas of 5 to 8 feet will increase to 10 to 12 feet Wednesday night as
stronger winds move into the area. Conditions will become hazardous
to small craft late Wednesday evening or Wednesday night.

Suggestions:
Secure loose items and stay informed and alert of the latest
information from the National Weather Service in Guam and your
local officials.

$$

Bowsher