Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service Tiyan GU
319 PM ChST Sun Nov 2 2025

PMZ151>154-022000-
/O.NEW.PGUM.SC.Y.0047.251102T2000Z-251103T0800Z/
Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters-
Saipan Coastal Waters-
319 PM ChST Sun Nov 2 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM TO 6 PM CHST MONDAY...

* WHAT...East winds 20 to 25 kt and seas 6 to 9 feet expected.

* WHERE...Marianas Coastal Waters.

* WHEN...From 6 AM to 6 PM ChST Monday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...A combination of an incoming trade-wind surge
  and elevated trade swell, conditions are expected to become
  hazardous to small craft. While winds are expected to taper down
  Monday night, a tropical disturbance may bring back small craft
  advisory conditions to the region around midweek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller vessels,
should avoid boating in hazardous conditions.

&&

$$

Montvila

Hydrologic Outlook

Hydrologic Outlook
GUC010-MPC100-110-120-070800-

Hydrologic Outlook
National Weather Service Tiyan GU
1145 AM ChST Sun Nov 2 2025


...TROPICAL DISTURBANCE TO BRING HEAVY RAINFALL BY MIDWEEK AND
POTENTIALLY INTO THE WEEKEND...

This Hydrologic Outlook is for Guam, Rota, Tinian and Saipan.

A tropical disturbance developing in central Micronesia, is expected
to move toward the Marianas in the next few days and bring heavy
downpours to the area around midweek. After the storm`s passage to
the west, feeder bands along the leeside of the system may bring an
extended period of rainfall for the rest of the week.

Moderate uncertainty remains regarding potential rainfall impacts,
but early estimates indicate this system to bring locally heavy
rainfall of 5 to 8 inches across the Marianas by the weekend. This
feature will be monitored closely over the next several days by
various agencies, so expected rainfall totals may change. Even so,
flash flooding remains a possibility Wednesday through Saturday.

As showers are likely to persist, consistent rainfall is likely to
saturate the soils enough to increase mudslide risk by the weekend,
especially at Guam.

Residents on these islands need to closely monitor this developing
situation as flood watches, advisories and flash flood warnings
could be issued later.

If living near streams and rivers, prepare to move items away from
stream and river banks. Make sure storm drains nearby are not
clogged, especially If living at low-lying areas.

$$

Montvila