FZUS72 KJAX 210903 MWSJAX Marine Weather Statement National Weather Service Jacksonville FL 503 AM EDT Mon Sep 21 2026 AMZ450-452-211000- 503 AM EDT Mon Sep 21 2026 ...SLOW MOVING THUNDERSTORMS OVER THE NEAR SHORE WATERS... The areas affected include... Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM... Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM... At 502 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located 7 nm north of Amelia City, or 28 nm south of St. Simons Island. The thunderstorm was nearly stationary. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, lightning strikes, and heavy downpours. Boaters should seek safe harbor immediately until this storm passes. && LAT...LON 3062 8126 3058 8144 3080 8153 3095 8136 $$ NELSON