Special Marine Warning Issued for Mississippi Sound, Lake Borgne
This alert is no longer in effect.
NOAA issued it on July 21, 2026, 4 weeks 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 New Orleans has issued a Special Marine Warning for Chandeleur Sound, Lake Borgne and Mississippi Sound until 12:30 PM CDT due to waterspouts and severe thunderstorms.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Mississippi Sound, Lake Borgne, Chandeleur Sound
- Issued
- July 21, 2026
- Issuing authority
- NWS New Orleans LA
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 4 weeks ago; use the issuing agency's live warning service for current conditions in Mississippi Sound, Lake Borgne, Chandeleur Sound.
Alert Details
Special Marine Warning issued by NWS New Orleans LA (NOAA). Effective from June 18 at 11:26 AM CDT until June 18 at 12:30 PM CDT.
Affected Areas
Mississippi Sound, Lake Borgne, Chandeleur Sound. Locations impacted include Waveland, Pass Christian, Ship Island, Cat Island, Bay St. Louis, Long Beach, Rigolets, Gulf Park Estates, Ocean Springs, Biloxi, and Gulfport.
What You Should Do
Boaters should avoid waterspouts and never try to navigate near them. Make sure all on board are wearing life jackets. Seek shelter or move to safe harbor until hazardous weather passes.
Expected Conditions
Cluster of severe thunderstorms capable of producing waterspouts located along a line extending from Pass Christian to 7 nm southeast of Lake Borgne, moving east at 20 knots. Hazard includes waterspouts and wind gusts to 40 knots.
Timeline
Alert effective June 18 at 11:26 AM CDT and expires June 18 at 12:30 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (941 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 21, 2026.
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