Spills · oil
7J3F+MJ dauphin island, al, USA
Mystery Sheen, Petit Bois Pass; Dauphin Island, Alabama · NOAAORR-11055
- issued
- 2025-08-21 00:00Z
- status
- cancelled 2025-09-04 00:00Z
- self-cancels
- 2025-09-04 00:00Z
- authority
- NOAA OR&R
- sea
- Gulf of Mexico
- position
- 30.254, -88.376
- source
- incidentnews · first seen 2026-09-03 15:09Z
Original warning text
Mystery Sheen, Petit Bois Pass; Dauphin Island, Alabama. 7J3F+MJ Dauphin Island, AL, USA. 1. At approximately 1545 local time, a U.S. Coast Guard (USCG) helicopter conducting a training overflight spotted a surface anomaly in the vicinity of the pass between Petit Bois and Dauphin Island. USCG Sector Mobile Incident Management Division conducted follow-up investigations with Chevron at Bayou Casotte to determine if any active lines in the region of the observed anomaly. Chevron indicated only natural gas lines in area and no loss of pressure. USCG contacted the NOAA Scientific Support Coordinator (SSC) to assist in identifying potential sources in the area and likely transport. USCG will conduct assessment via uncrewed aerial systems and vessel in the morning. Winds are light and variable, somewhat SW and tide is rising with high tide at 0948 on 22 Aug. SSC standing by for further assistance. 2. THREAT: OIL. 3. POSITION 30.254N 088.376W. NOAA INCIDENTNEWS 11055: https://incidentnews.noaa.gov/incident/11055
This area · spills & pollution incidents
927 within 180 nm since 1970 · 32 in the last 12 months · 2 in force now
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- Crude oil spill and in-situ burn at tpic; south pass 24, pilottown, louisiana2026-08-26
- 8X38+5H dauphin island, al, USA2026-08-24
- Mystery sheen at south pass 29; port eads, louisiana2026-08-13
- Wcc oil spill, main pass 21; breton sound, louisiana2026-06-11
- Tpic oil spill, main pass 81; gulf of america2026-06-10
- Oil spill from out-of-service tank at tpic main pass 69 facility; louisiana2026-05-19
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Nearby now · within 120 nm
Worldwide now
8 spills & pollution incidents in force · see all
Spills
Oil and chemical spills, groundings and vessel casualties with a pollution threat: NOAA IncidentNews responses since 1957, and spill-response areas broadcast as navigational warnings. All current spills & pollution incidents →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.