Headline:
High Surf Warning issued April 18 at 4:03AM ChST until April 18 at 10:00AM ChST by NWS Tiyan GU
Event:
High Surf Warning
Urgency:
Expected
Effective:
April 17, 2026 - 11:03am
Expires:
April 18, 2026 - 1:15am
Description:
* WHAT...For the High Surf Warning, dangerously
large breaking waves of 12 to 17 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 of Tinian and Saipan.
* WHEN...For the High Surf Warning, until 10 AM ChST this
morning. For the Coastal Flood Advisory, until 11 AM ChST Sunday.
For the High Surf Advisory, from 10 AM this morning to 5 PM ChST
Sunday. For the High Rip Current Risk, through Sunday afternoon.
* 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. 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.
Instruction:
Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.
Rip currents will be life threatening. If caught in a rip
current, relax and float. Don't swim against the current. If
able, swim in a direction following the shoreline. If unable to
escape, face the shore and call or wave for help.
Area Description:
Tinian; Saipan
Forcast Office:
NWS Tiyan GU
Sender: