High Surf Advisory issued April 17 at 4:00PM ChST until April 19 at 5:00PM ChST by NWS Tiyan GU

Details

* WHAT...For the Coastal Flood Warning, significant coastal flooding
of 3 to 5 feet. For the High Surf Warning, dangerously large
breaking waves of 17 to 23 feet. For the Coastal Flood Advisory,
minor coastal flooding of 1 to 2 feet expected. For the High Surf
Advisory, large breaking waves of 10 to 14 feet expected. For the
High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
Tinian and Saipan.

* WHEN...For the Coastal Flood Warning, until 5 AM ChST Saturday.
For the High Surf Warning, until 10 AM ChST Saturday. For the
Coastal Flood Advisory, from 5 AM Saturday to 11 AM ChST Sunday.
For the High Surf Advisory, from 10 AM Saturday to 5 PM ChST
Sunday. For the High Rip Current Risk, through Sunday afternoon.

* 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. Rip currents can sweep even the best swimmers away
from shore into deeper water.

* ADDITIONAL DETAILS...As Typhoon Sinlaku continues to move away, the
primary swell and highest surf will be northwest. Seas will be
slow to subside over the next couple of days.