Gulf South Critical Period for Areas 1, 2, 3, and 4

SEV 4/5Operational AlertUntil further notice

Summary

Gulf South Pipeline has declared a Critical Period across all four of its operating areas (1, 2, 3, and 4) effective 2026-08-19 10:40 AM CT, citing constrained operating conditions and limited operational flexibility to manage shipper imbalances. Shippers are required to balance receipts and deliveries at a Uniform Hourly Rate of Flow, with OFO issuance explicitly threatened if compliance is not achieved. No end time has been posted, and no specific capacity volume has been quantified, but a system-wide Critical Period declaration covering all areas is the broadest possible precursor to a formal OFO on Gulf South.

Trading note

System-wide Gulf South Critical Period covering all four areas -- the broadest possible pre-OFO alert on this Louisiana/Gulf Coast collector -- signals meaningful supply tightness along the Haynesville and Gulf Coast onshore corridor; the Perryville Transportation Point was already running OVER capacity (scheduled 1.76 Bcf/d vs. 1.10 Bcf/d operating capacity, 159.7% utilization) as of the 2026-08-18 gas day (one day prior to this notice), corroborating the declared system stress; watch for Henry Hub (regional proxy, most recently 2.825 on 2026-08-18) and Transco Zone 4 basis to firm if a formal OFO follows.

Reroute potential

Moderate: Southern Natural Gas (SNG, unmonitored), Transco (monitored), and Tennessee Gas Pipeline (monitored) serve overlapping Gulf Coast and Southeast markets, providing partial alternative routing for shippers able to redirect volumes; however, a system-wide Gulf South Critical Period affecting all four areas limits the volume that can realistically shift and SNG real-time conditions are unverified.

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View original notice text (as posted by Gulf South Pipeline)

Pipeline: Gulf South Pipeline
Notice ID: 5038596
Notice Type: Operational Alert
Status: Initiate
Posted: 2026-08-19T10:36:00+00:00
Effective: 2026-08-19T10:40:00+00:00
End: 
Subject: Gulf South Critical Period for Areas 1, 2, 3, and 4

Gulf South Pipeline Notice 5038596
Source Link
All information here is provided as a service and information is not guaranteed to be accurate. PipeRiv is not responsible for any incorrect information.
TSP Name :
Gulf South Pipeline Company, LLC
Category :
Critical
Notice Type Desc :
Operational Alert
Notice Stat Desc :
Initiate
Notice ID :
5038596
Prior Notice :
Reqrd Rsp Desc :
No response required
Subject :
Gulf South Critical Period for Areas 1, 2, 3, and 4
TSP :
078444247
Post Date/Time :
08/19/2026 10:36:00 AM
Notice Effective Date/Time :
08/19/2026 10:40:00 AM
Notice End Date/Time :
Response Date/Time :
Critical :
Notice Text :
Gulf South Pipeline Company, LLC ("Gulf South") is declaring a Critical Period in Areas 1, 2, 3,
and 4 due to constrained operating conditions and limited operational flexibility to manage
shipper imbalances. All shippers are required to closely balance receipts and deliveries and
operate in a manner that supports the safe and reliable operation of the pipeline system.
Pursuant to Section 6.18[3] of Gulf South's General Terms and Conditions ("GT&C") and the
applicable firm rate schedules, during a Critical Period shippers must conform receipts into the
system with deliveries taken from the system and receive and deliver gas at a Uniform Hourly Rate
of Flow.
Failure to maintain balanced operations or comply with applicable flow requirements may adversely
impact system reliability during this Critical Period. Gulf South will monitor shipper activity
and may implement additional operational measures, including the issuance of an Operational Flow
Order ("OFO") if necessary to protect system integrity.
Shippers are strongly encouraged to take immediate action to reduce imbalances and ensure
compliance with all applicable tariff provisions. Failure to comply during a declared Critical
Period may subject shippers to penalties in accordance with Section 6.19[3] of Gulf South's FERC
Gas Tariff.
Shippers should continue to monitor Gulf South's Informational Postings website for updates
regarding system conditions and additional operational notices.
If you have any questions, please contact your customer service representative.
Notice
Page 1 of 1
08/19/2026 10:36:06 AM
Notice
TSP Name :
Gulf South Pipeline Company, LLC
TSP :
078444247
Category :
Critical
Post Date/Time :
08/19/2026 10:36:00 AM
Notice Type Desc :
Operational Alert
Notice Effective Date/Time :
08/19/2026 10:40:00 AM
Notice Stat Desc :
Initiate
Notice End Date/Time :
Notice ID :
5038596
Response Date/Time :
Prior Notice :
Critical :
Reqrd Rsp Desc :
No response required
Subject :
Gulf South Critical Period for Areas 1, 2, 3, and 4
Notice Text :
Gulf South Pipeline Company, LLC ("Gulf South") is declaring a Critical Period in Areas 1, 2, 3,
and 4 due to constrained operating conditions and limited operational flexibility to manage
shipper imbalances. All shippers are required to closely balance receipts and deliveries and
operate in a manner that supports the safe and reliable operation of the pipeline system.
Pursuant to Section 6.18[3] of Gulf South's General Terms and Conditions ("GT&C") and the
applicable firm rate schedules, during a Critical Period shippers must conform receipts into the
system with deliveries taken from the system and receive and deliver gas at a Uniform Hourly Rate
of Flow.
Failure to maintain balanced operations or comply with applicable flow requirements may adversely
impact system reliability during this Critical Period. Gulf South will monitor shipper activity
and may implement additional operational measures, including the issuance of an Operational Flow
Order ("OFO") if necessary to protect system integrity.
Shippers are strongly encouraged to take immediate action to reduce imbalances and ensure
compliance with all applicable tariff provisions. Failure to comply during a declared Critical
Period may subject shippers to penalties in accordance with Section 6.19[3] of Gulf South's FERC
Gas Tariff.
Shippers should continue to monitor Gulf South's Informational Postings website for updates
regarding system conditions and additional operational notices.
If you have any questions, please contact your customer service representative.
08/19/2026 10:36:06 AM
Page 1 of 1

ID: GSPL-5038596 | Rev. 1 | Posted: 2026-08-19 15:46 | Direction: Bullish All Gulf South Pipeline notices · page generated 2026-09-26 06:43 UTC