Headline:
Coastal Flood Watch issued March 17 at 4:01PM ChST until March 18 at 4:00PM ChST by NWS Tiyan GU
Event:
Coastal Flood Watch
Urgency:
Future
Effective:
March 16, 2026 - 11:01pm
Expires:
March 17, 2026 - 2:00pm
Description:
* WHAT...Large breaking waves of 10 to 12 feet. Dangerous rip
currents. Possible coastal inundation along northern shorelines
especially during high tides. Reduced wave heights have allowed
for the High Surf Warning to expire.
* WHERE...For High Surf Advisory and Coastal flood Watch along
North reefs and shore and for the High Risk of Rip Currents
north and east facing reefs of Guam, Rota, Tinian and Saipan.
* WHEN...Until 4 PM ChST Wednesday.
* IMPACTS...A few roads may be closed. Low lying property may be
inundated. Some shoreline erosion may 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...Long period NNW swell from a low pressure
system near Japan and long-period NE swell from a Kona Low
northwest of Hawai'i continue to produce hazardous surf and a
high risk of rip currents along north and east facing reefs.
Hazardous surf of at least 9 feet along north reefs will
continue through at least Wednesday afternoon. Surf has already
fallen below hazardous levels of 9 feet along west and 12 feet
along east facing reefs. Coastal inundation along northern
shorelines of 1 to 2 feet is possible through Wednesday
afternoon especially during high tide.
Instruction:
Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.
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:
Guam; Rota; Tinian; Saipan
Forcast Office:
NWS Tiyan GU
Sender: