Coastal Flood Warning for Guam; Rota; Tinian +1 more
Official alert fields
What you need to know
- Effective
- Ends or expires
- Official severity
- Severe
- Official urgency
- Expected
- Official certainty
- Likely
What is happening
What: For the Coastal Flood Warning, significant coastal flooding expected for south and east facing shorelines. For the High Surf Warning, dangerously large breaking waves up to 30 feet for Guam, 20 to 25 feet for Rota, and 15 to 20 feet for Tinian and Saipan. Impacts: Numerous roads may be closed. Low-lying...
What the bulletin says to do
Everyone should remain out of the water due to life-threatening surf conditions. Stay well away from the coast.
Full official description
Bulletin details
* WHAT...For the Coastal Flood Warning, significant coastal flooding expected for south and east facing shorelines. For the High Surf Warning, dangerously large breaking waves up to 30 feet for Guam, 20 to 25 feet for Rota, and 15 to 20 feet for Tinian and Saipan. * WHERE...South and east facing reefs of Guam, Rota, Tinian and Saipan. * WHEN...From 5 PM this afternoon to 4 AM ChST Monday. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure will be inundated. Shoreline erosion will occur. Breaking waves can sweep people off their feet, and into dangerous seas. Life- threatening swimming conditions and significant beach erosion can be expected. Coastal inundation of 5 to 7 feet for Guam, 2 to 4 feet for Rota and 2 to 4 feet for Tinian and Saipan is possible along with coastal flooding and beach erosion. * ADDITIONAL DETAILS...Dangerous surf from the southeast will continue the next day or so.
Official geometry where available
Alert boundary
Lifecycle record
Official revisions
- Alert
Coastal Flood Warning issued October 18 at 7:55AM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Official revision - Update
Coastal Flood Warning issued October 17 at 4:31PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Official revision - Update
Coastal Flood Warning issued October 17 at 10:25AM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Official revision - Alert
Coastal Flood Warning issued October 17 at 7:26AM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Tiyan GU. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Alert
- Last collected