Special Marine Warning Issued for Delaware Bay Waters
This alert is no longer in effect.
NOAA issued it on August 20, 2026, 3 days ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Mount Holly NJ issued a Special Marine Warning for Delaware Bay waters until 5:00 PM EDT due to severe thunderstorms capable of producing waterspouts.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Delaware Bay
- Issued
- August 20, 2026
- Issuing authority
- NWS Mount Holly NJ
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 3 days ago; use the issuing agency's live warning service for current conditions in Delaware Bay.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Mount Holly NJ. The alert is effective from 3:26 PM EDT on August 20, 2026, until 5:00 PM EDT on August 20, 2026.
Affected Areas
The warning covers Delaware Bay waters north of East Point NJ to Slaughter Beach DE and Delaware Bay waters south of East Point NJ to Slaughter Beach DE. Severe thunderstorms will be near Fortesque Beach, Ship John Shoal Light, East Point, Sea Breeze, and Woodland Beach around 3:30 PM EDT.
What You Should Do
Boaters should seek safe harbor immediately until these storms pass. If caught on the open water, stay below deck if possible and keep away from ungrounded metal objects. Wind gusts 34 knots or greater, small hail, high waves, lightning, and heavy rain are expected.
Expected Conditions
Severe thunderstorms capable of producing waterspouts are moving northeast at 30 knots. Hazards include waterspouts, wind gusts 34 knots or greater, and small hail. Waterspouts are possible.
Timeline
The alert is in effect from 3:26 PM EDT until 5:00 PM EDT on August 20, 2026. A Tornado Watch remains in effect until 10:00 PM EDT for central and northern Delaware and southern New Jersey.
Original source: NOAA Official Notice ↗
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,224 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 20, 2026.
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