Expires:201904090900;;026675 FZMY50 PGUM 081736 CWFMY Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 336 AM ChST Tue Apr 9 2019 Marianas Waters out to 40 nautical miles PMZ150-090900- 336 AM ChST Tue Apr 9 2019 .Synopsis for Marianas Waters...Gentle to moderate trade winds and combined seas of 4 to 5 feet will persist the next several days. $$