The National Weather Service in Mount Holly, New Jersey, issued a Special Marine Warning at 8:28 PM EDT on August 10, effective until 8:45 PM EDT, for waters from Cape May, New Jersey, to Fenwick Island, Delaware, extending 20 to 60 nautical miles offshore. According to the NWS, radar indicated strong thunderstorms along a line from 11 nautical miles southeast of Five Fathoms Buoy to 6 nautical miles north of Chicken Bone, moving east at 25 knots. The storms are capable of producing wind gusts of 34 knots or greater.
KEY FACTS
- The warning covers offshore waters from Cape May, NJ, to Fenwick Island, DE, from 20 to 60 nautical miles out.
- Radar indicated strong thunderstorms along a line from 11 nm southeast of Five Fathoms Buoy to 6 nm north of Chicken Bone, moving east at 25 knots.
- The primary hazard is wind gusts of 34 knots or greater, which could damage small craft and create suddenly higher waves.
- The storms are expected to remain over mainly open waters, but mariners in the area should take immediate precautions.
- The warning expires at 8:45 PM EDT, but additional warnings may be issued if conditions warrant.
CONTEXT
The Special Marine Warning is issued by the National Weather Service when severe weather conditions, such as strong thunderstorms, are imminent or occurring over coastal waters. The warning area, from Cape May to Fenwick Island, is a busy shipping lane and popular for recreational boating. Wind gusts of 34 knots (approximately 39 mph) can create hazardous conditions for small craft, including sudden increases in wave height and difficulty in steering. The NWS uses radar to detect these storms and provides timely alerts to mariners. This particular warning is short lived, lasting only 17 minutes, indicating a fast moving storm system. Mariners are advised to seek safe harbor or take appropriate measures to secure their vessels until the storm passes. The NWS continues to monitor the situation and will issue updates as necessary.
WHY IT MATTERS
This warning highlights the sudden and localized nature of marine weather hazards. For commercial and recreational mariners operating in the Delaware Bay and Atlantic coastal waters, timely warnings are critical for safety. Even brief storms can pose significant risks, including capsizing, damage to vessels, and injury to crew. The NWS's ability to provide precise, radar based warnings helps mitigate these risks, but mariners must heed the alerts and act quickly. This event also underscores the importance of checking marine forecasts before heading out, as conditions can change rapidly.
WHAT TO WATCH
- Monitor NWS updates for any extensions or new warnings in the area.
- Observe local radar and weather conditions if you are in the affected waters.
- Check for any reports of damage or incidents from the storm.
- Note the storm's movement and intensity as it progresses eastward.