Special Marine Warning Issued for Upper Delaware Bay as Severe Thunderstorms Approach
NWS Mount Holly has issued a Special Marine Warning for the Upper Delaware Bay until 9:15 PM EDT, citing threats of waterspouts, 50-knot wind gusts, and small hail.
Alert Details
The National Weather Service in Mount Holly, NJ, has issued a Special Marine Warning for the Upper Delaware Bay. The alert was issued at 7:47 PM EDT on March 11, 2026, following radar detection of severe thunderstorms moving through the region.
Affected Areas
The warning covers the Delaware Bay waters north of East Point, NJ, to Slaughter Beach, DE. Specific locations expected to be impacted include:
- Fortesque Beach
- Sea Breeze
- Pea Patch Island
- Woodland Beach
- Stony Point
- Ship John Shoal Light
- Cross Ledge Light
- Reedy Point
What You Should Do
Mariners and those on the water are advised to move to safe harbor immediately. Waterspouts can easily overturn boats and create locally hazardous seas. Small craft are at risk of damage from sudden high waves and intense wind gusts.
Expected Conditions
Severe thunderstorms were located along a line moving east at 55 knots. According to radar data, the following hazards are expected:
- Waterspouts: Potential for sudden formation which can create hazardous sea conditions.
- Wind: Gusts reaching nearly 50 knots.
- Hail: Small hail is possible within the storm line.
Timeline
The Special Marine Warning is effective immediately as of 7:47 PM EDT and is scheduled to remain in effect until 9:15 PM EDT on Wednesday, March 11, 2026.
Source: NOAA Official Notice
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