High Surf Advisory

Coastal Hazard Message
National Weather Service Tiyan GU
303 PM ChST Thu Sep 12 2024

GUZ001-MPZ001>003-121915-
/O.EXT.PGUM.SU.Y.0045.000000T0000Z-240914T0900Z/
Guam-Rota-Tinian-Saipan-
303 PM ChST Thu Sep 12 2024

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 7 PM CHST SATURDAY...

* WHAT...Large breaking waves of 9 to 11 feet in the surf zone.

* WHERE...West and South Reefs of the Marianas.

* WHEN...Until 7 PM ChST Saturday.

* IMPACTS...Dangerous swimming and surfing conditions and
  localized beach erosion.

* ADDITIONAL DETAILS...Large surf will be due to the monsoonal
  surge that has developed behind Tropical Storn Bebinca, which
  has moved away from the Marianas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.

&&

$$

Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service Tiyan GU
303 PM ChST Thu Sep 12 2024

PMZ151>154-121915-
/O.EXT.PGUM.SC.Y.0054.000000T0000Z-240913T0800Z/
Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters-
Saipan Coastal Waters-
303 PM ChST Thu Sep 12 2024

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM CHST FRIDAY...

* WHAT...South-southeast winds 15 to 25 kt with gusts up to 35
  kt and seas 9 to 12 feet.

* WHERE...Marianas Coastal Waters.

* WHEN...Until 6 PM ChST Friday.

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

* ADDITIONAL DETAILS...These winds will be because of a monsoon
  surge flowing into the back side of Tropical Storm Bebinca
  which has moved away from Guam and the Marianas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners...especially those operating smaller
vessels...should avoid sailing in these conditions.

&&

$$

Flood Watch

Flood Watch
National Weather Service Tiyan GU
255 PM ChST Thu Sep 12 2024

GUZ001-MPZ001>003-122200-
/O.CON.PGUM.FA.A.0001.000000T0000Z-240913T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Guam-Rota-Tinian-Saipan-
255 PM ChST Thu Sep 12 2024

...FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Guam, Rota, Saipan and Tinian.

* WHEN...Through Saturday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - A monsoon tail flowing into Tropical Storm Bebinca continues
    to create windy and showery weather over saturated soils.

    Between 6 and 10 inches of rain have already fallen across
    the Marianas and additional 3 to 5 inches will be possible
    through Friday night. The monsoonal surge bringing the heavy
    rain this week could persist into the weekend and the flood
    watch may need to be extended further.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Williams