Spills · mystery_substance

Mystery slick, grand isle block 43; gulf of mexico, la

NOAAORR-7996

issued: 2009-03-19 00:00Z
status: cancelled 2009-04-02 00:00Z
self-cancels: 2009-04-02 00:00Z
authority: NOAA OR&R
sea: Gulf of Mexico
position: 29.001, -89.859
source: incidentnews · first seen 2026-09-03 15:09Z

Original warning text

Mystery Slick, Grand Isle Block 43; Gulf of Mexico, LA.
Gulf of Mexico, LA.
1. On 19 March 2008, NOAA was notified of a 4-mile long slick in the Gulf of Mexico off Grand Isle LA. The source of the release is unknown. USCG requested a trajectory analysis, and such was provided by the Emergency Response Division’s Home Team in Seattle WA.
2. THREAT: OIL. COMMODITY: UNKNOWN OIL (SHEEN). TAGS: MYSTERY SUBSTANCE.
3. POSITION 29.001N 089.859W. NOAA INCIDENTNEWS 7996: https://incidentnews.noaa.gov/incident/7996

This area · spills & pollution incidents

1043 within 180 nm since 1970 · 35 in the last 12 months · 2 in force now

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Season · when spills & pollution incidents happen here

month of issue, all years in the archive

Timeline · 14 messages since 2009-01-08 · closed 2009-06-06

Gom, off belle pass, la2009-01-08 → 2009-01-22
Mystery release, south timbalier 23; gulf of mexico, la2009-01-11 → 2009-01-25
Gulf of mexico, la2009-01-11 → 2009-01-25
South pass block 27, oil spill; gom, louisiana coast2009-02-12 → 2009-02-26
Bay marchand block 1, oil spill; gulf of mexico, la2009-02-12 → 2009-02-26
Mystery sheen west delta block 94; gulf of mexico, offshore la2009-02-14 → 2009-02-28
Tug-barge collision miss r; mm 107 upriver of new orleans2009-03-12 → 2009-03-26
Mystery slick, grand isle block 43; gulf of mexico, la this message2009-03-19 → 2009-04-02
Mystery slick, MM112; mississippi river, luling la2009-03-28 → 2009-04-11
Leaking flowline; west delta 28, la2009-04-22 → 2009-05-06
Turtle bay, la2009-04-30 → 2009-05-14
River, hahnville, la2009-05-08 → 2009-05-22
On 12 may 2009, the regional noaa scientific support coordinator (ssc) was notified of a crude oil spill in…2009-05-12 → 2009-05-26
Barataria bay, la2009-05-23 → 2009-06-06

joined by proximity

Nearby now · within 120 nm

Crude oil spill and in-situ burn at tpic; south pass 24, pilottown, louisianaSpills · 30.5 nm
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