WHMY40 PGUM 150014
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
1014 AM ChST Wed Apr 15 2026

GUZ001-MPZ001>003-151415-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260415T1900Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260416T0800Z/
Guam-Rota-Tinian-Saipan-
1014 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,
  up to 10 feet for Tinian and Saipan; 6 feet for Rota, and up to 4
  feet for Guam. For the High Surf Warning, dangerously large
  breaking waves of 11 to 16 feet for Guam, 15 to 20 feet for Rota,
  and 20 to 30 feet for Tinian and Saipan.

* WHERE...North, 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. The Coastal Flood Warning may need to be extended for
  Tinian and Saipan if Sinlaku slows down a bit.

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.

&&

$$

Kleeschulte