Within the Eastern Pacific Ocean two offices of the United States National Weather Service assign names to tropical cyclones when they are judged to have intensified into a tropical storm with winds of at least 65 km\/h , ( 40 mph ) . Within the Eastern Pacific Ocean there are two Regional Specialized Meteorological Centers ( RSMC 's ) who assign names to tropical cyclones when they are judged to have intensified into a tropical storm with winds of at least 65 km\/h , ( 40 mph ) .