Headline:
Coastal Flood Advisory issued July 7 at 6:56PM ChST until July 8 at 6:00AM ChST by NWS Tiyan GU
Event:
Coastal Flood Advisory
Urgency:
Expected
Effective:
July 7, 2026 - 1:56am
Expires:
July 7, 2026 - 3:00pm
Description:
Updated to remove reef distinction, see additional details.
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 4 PM CHST THURSDAY...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST
WEDNESDAY...
* WHAT...Dangerously large breaking waves up to 20 feet,
decreasing to 10 to 15 feet Thursday. Minor coastal flooding
expected.
* WHERE...Guam, Rota, Tinian and Saipan.
* WHEN...For the High Surf Warning, until 4 PM ChST Thursday. For
the Coastal Flood Advisory, until 6 AM ChST Wednesday.
* IMPACTS...Flooding of lots, parks, and roads with only isolated
road closures expected. 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...Typhoon Bavi (09W) and the trailing monsoon
surge will continue to produce significant swells towards the
Marianas. Dangerous surf heights of up to 20 ft and coastal
inundation of 1 to 3 ft can be expected through at least
tonight, especially along west-facing shores. A local observer
reports 15 to 18 ft at Oka point. Then, surf will gradually
diminish as Bavi moves farther away. South and west facing
shores are expected to see the highest surf. Huge waves are
producing deadly rip currents through at least Wednesday night.
Instruction:
Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.
Area Description:
Guam; Rota; Tinian; Saipan
Forcast Office:
NWS Tiyan GU
Sender:
w-nws.webmaster@noaa.gov