AI Summary

A marine weather statement was issued by the National Weather Service in San Juan, Puerto Rico, at 12:18 AM AST on September 10. The alert covers Atlantic waters off Puerto Rico and the U.S. Virgin Islands from 10 NM to 19.5 NM, and coastal waters of northern Puerto Rico out to 10 NM. Doppler radar at the time detected a strong thunderstorm capable of producing winds of about 30 to 40 knots.

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