AI Summary

A marine warning was issued by the National Weather Service in Jacksonville, Florida, on June 20 at 9:03 PM EDT. The warning was in effect until 10:00 PM EDT the same night. The warning applied to specific waters off the coast of Florida, including areas from Fernandina Beach to St. Augustine and from St. Augustine to Flagler Beach. The affected waters were within a 20- to 60-nautical-mile radius. The warning was issued in response to strong thunderstorms in the area at the time, but the specific details of the storms' impact are not specified in the warning.

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