WHMY40 PGUM 141834
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
434 AM ChST Wed Apr 15 2026

GUZ001-MPZ001>003-150845-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260415T1900Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260416T0800Z/
Guam-Rota-Tinian-Saipan-
434 AM ChST Wed Apr 15 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM CHST
THURSDAY...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM CHST THURSDAY...

* WHAT...For the Coastal Flood Warning, significant coastal
  flooding. For the High Surf Warning, dangerously large breaking
  waves of 11 to 16 for Guam, 15 to 20 feet for Rota, and 20 to
  30 feet for Tinian and Saipan.

* WHERE...East, south, and west facing reefs of  Tinian and Saipan.
  South, west, and north facing reefs of Guam and Rota.

* WHEN...For the Coastal Flood Warning, until 5 AM ChST Thursday.
  For the High Surf Warning, until 6 PM ChST Thursday.

* IMPACTS...Numerous roads may be closed. Low lying property
including homes, businesses, and some critical infrastructure
will be inundated. Some shoreline erosion will occur. Breaking
waves can sweep people off jetties and docks, and into dangerous
seas. Life-threatening swimming conditions and significant beach
erosion can be expected.

* ADDITIONAL DETAILS...As TY Sinlaku moves away and wind driven waves
decrease, the primary swell and highest surf will shift toward the
northwest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.

&&

$$

Schank