Public Notices

    This section contains public market notifications required by protocols as well as other market messages ERCOT may post for market transparency. Notices are categorized by types and can be filtered by selecting the desired category. ERCOT began archiving public notices November 3, 2011.

    Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018
    Date Message Type Status
    Mar 31 2018 08:46:06 CST The Daily RSASM for Saturday, March 31, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 31 2018 00:17:16 CST No sudden loss of generation greater than 450 MW occurred on March 30, 2018. Operational Information Active
    Mar 30 2018 08:47:46 CST The Daily RSASM for Friday, March 30, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 30 2018 00:00:40 CST On 03/29/2018, a sudden loss of generation occurred at 16:09 totaling 563 MW. Frequency declined to 59.891 Hz, ERCOT load was 41, 107 MW. Operational Information Active
    Mar 29 2018 16:13:23 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Mar 29 2018 16:09:47 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Mar 29 2018 15:33:04 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Mar 29, 2018 is available. Operational Instruction Active
    Mar 29 2018 15:30:07 CST Test Message on Notice Builder/Twitter: This is a test of the ERCOT notification service. Operational Information Active
    Mar 29 2018 08:45:35 CST The Daily RSASM for Thursday, March 29, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 29 2018 00:03:40 CST No sudden loss of generation greater than 450 MW occurred on March 28, 2018. Operational Information Active
    Mar 28 2018 19:19:12 CST ERCOT has cancelled the following notice: The E-tagging system is down for the AEP Corpus DC Tie Operator and no new schedules will be accepted across the Eagle Pass (DC_S) and Laredo (DC_L) DC Ties at this time. Operational Information Cancelled
    Mar 28 2018 13:35:58 CST The E-tagging system is down for the AEP Corpus DC Tie Operator and no new schedules will be accepted across the Eagle Pass (DC_S) and Laredo (DC_L) DC Ties at this time. Operational Information Active
    Mar 28 2018 08:47:03 CST The Daily RSASM for Wednesday, March 28, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 28 2018 00:02:41 CST No sudden loss of generation greater than 450 MW occurred on March 27, 2018. Operational Information Active
    Mar 27 2018 22:30:15 CST ERCOT has cancelled the following notice: 2100 ERCOT is issuing a Transmission Watch for the Rio Grande Valley due to local congestion in the Rio Grande Valley. Operational Information Cancelled
    Mar 27 2018 21:04:39 CST 2100 ERCOT is issuing a Transmission Watch for the Rio Grande Valley due to local congestion in the Rio Grande Valley. Operational Information Active
    Mar 27 2018 16:33:49 CST The BDAVIS RAS is back in service. Operational Information Active
    Mar 27 2018 13:31:06 CST Railroad DC Tie (DC_ROAD) will be de-rated to 150MW Monday 04/02/18 at 07:00 until Friday 04/06/18 at 19:00. Operational Information Active
    Mar 27 2018 08:51:34 CST The Daily RSASM for Tuesday, March 27, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 27 2018 00:02:12 CST No sudden loss of generation greater than 450 MW occurred on March 26, 2018. Operational Information Active
    Mar 26 2018 08:48:00 CST The Daily RSASM for Monday March 26, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 26 2018 00:13:44 CST No sudden loss of generation greater than 450 MW occurred on March 25, 2018. Operational Information Active
    Mar 25 2018 08:46:51 CST The Daily RSASM for Sunday March 25, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 25 2018 00:47:11 CST On 03/24/2018, a sudden loss of generation occurred at 20:47 totaling 796.14 MW. Frequency declined to 59.854 Hz, ERCOT load was 41, 163 MW. Operational Information Active
    Mar 24 2018 20:50:38 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Mar 24 2018 20:47:18 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Mar 24 2018 08:49:50 CST The Daily RSASM for Saturday March 24, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 24 2018 00:11:41 CST No sudden loss of generation greater than 450 MW occurred on March 23, 2018. Operational Information Active
    Mar 23 2018 08:47:04 CST The Daily RSASM for Friday March 23, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 23 2018 00:15:09 CST No sudden loss of generation greater than 450 MW occurred on March 22, 2018. Operational Information Active
    Mar 22 2018 08:48:09 CST The Daily RSASM for Thursday March 22, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 22 2018 00:53:11 CST No sudden loss of generation greater than 450 MW occurred on March 21, 2018. Operational Information Active
    Mar 21 2018 08:46:13 CST The Daily RSASM for Wednesday March 21, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 21 2018 00:59:49 CST No sudden loss of generation greater than 450 MW occurred on March 20, 2018. Operational Information Active
    Mar 20 2018 12:57:13 CST ERCOT has cancelled the following notice: Advisory issued due to ERCOT Voltage Security Assessment Tool is currently unavailable. Advisory Cancelled
    Mar 20 2018 12:02:36 CST Advisory issued due to ERCOT Voltage Security Assessment Tool is currently unavailable. Advisory Active
    Mar 20 2018 08:45:59 CST The Daily RSASM for Tuesday March 20, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 20 2018 00:04:12 CST No sudden loss of generation greater than 450 MW occurred on March 19, 2018. Operational Information Active
    Mar 19 2018 12:48:43 CST ERCOT has cancelled the following notice: Advisory issued due to ERCOT’s Voltage Security Assessment Tool is currently unavailable. Advisory Cancelled
    Mar 19 2018 12:15:13 CST Advisory issued due to ERCOT’s Voltage Security Assessment Tool is currently unavailable. Advisory Active
    Mar 19 2018 09:37:02 CST The minimum monthly Ancillary Services quantities have been posted to the ERCOT Market Information System (MIS) under the Projected Ancillary Service Requirements link under the Medium-Term System Adequacy heading. The posted quantities reflect minimum requirements only. ERCOT will follow-up with a Notification if any upward adjustments to these minimum quantities are made. https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Forecasts AS Postings Active
    Mar 19 2018 08:46:59 CST The Daily RSASM for Monday March 19, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Mar 19 2018 07:02:30 CST ERCOT has cancelled the following notice: At 22:20, ERCOT is issuing a Transmission Watch due to a post-contingency overload in Far West Texas. A temporary outage action plan is being developed. Operational Information Cancelled
    Mar 19 2018 05:03:01 CST No sudden loss of generation greater than 450 MW occurred on March 18, 2018 Operational Information Active
    Mar 18 2018 22:26:15 CST At 22:20, ERCOT is issuing a Transmission Watch due to a post-contingency overload in Far West Texas. A temporary outage action plan is being developed. Operational Information Active
    Mar 18 2018 08:48:01 CST The Daily RSASM for Sunday March 18, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 18 2018 04:29:25 CST No sudden loss of generation greater than 450 MW occurred on March 17, 2018 Operational Information Active
    Mar 18 2018 04:28:56 CST No sudden loss of generation greater than 450 MW occurred on March 16, 2018 Operational Information Active
    Mar 17 2018 08:46:58 CST The Daily RSASM for Saturday March 17, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 16 2018 12:06:26 CST ERCOT has cancelled the following notice: HVDC Tie Eagle Pass (DC_EGPS) will remain unavailable due to a forced extension of forced outage through 03/15/2018 @ 1800hrs Operational Information Cancelled
    Mar 16 2018 12:06:14 CST ERCOT has cancelled the following notice: HVDC Tie Eagle Pass (DC_EGPS) will remain unavailable due to a forced extension of forced outage through 03/15/2018 @ 1800hrs Operational Information Cancelled
    Mar 16 2018 12:05:08 CST ERCOT has cancelled the following notice: The South (Eagle Pass) DC Tie remains unavailable thru Friday, March 23, 2018 at 18:00 due to a Forced Extension. Operational Information Cancelled
    Mar 16 2018 08:47:11 CST The Daily RSASM for Friday March 16, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 16 2018 00:11:34 CST No sudden loss of generation greater than 450 MW occurred on March 15, 2018 Operational Information Active
    Mar 15 2018 23:51:19 CST ERCOT has cancelled the following notice: 17:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Cancelled
    Mar 15 2018 17:50:08 CST 17:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Active
    Mar 15 2018 15:33:54 CST The South (Eagle Pass) DC Tie remains unavailable thru Friday, March 23, 2018 at 18:00 due to a Forced Extension. Operational Information Active
    Mar 15 2018 15:20:14 CST ERCOT has cancelled the following notice: DC-R tie (RAILROAD) will be de-rated to 150MW Thursday 03/15/18 at 06:00 until 13:00. Operational Information Cancelled
    Mar 15 2018 09:26:05 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a planned outage. Operational Information Cancelled
    Mar 15 2018 08:48:45 CST The Daily RSASM for Thursday March 15, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 15 2018 08:44:42 CST ERCOT is taking manual actions to pre-posture for a planned outage. Operational Information Active
    Mar 15 2018 00:02:41 CST No sudden loss of generation greater than 450 MW occurred on March 14, 2018 Operational Information Active
    Mar 14 2018 21:52:29 CST ERCOT has cancelled the following notice: 19:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Cancelled
    Mar 14 2018 19:52:05 CST 19:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Active
    Mar 14 2018 17:15:31 CST HVDC Tie Eagle Pass (DC_EGPS) will remain unavailable due to a forced extension of forced outage through 03/15/2018 @ 1800hrs Operational Information Active
    Mar 14 2018 08:47:45 CST The Daily RSASM for Wednesday, March 14, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 14 2018 01:40:17 CST No sudden loss of generation greater than 450 MW occurred on March 13, 2018 Operational Information Active
    Mar 13 2018 21:54:47 CST ERCOT has cancelled the following notice: 17:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Cancelled
    Mar 13 2018 17:49:59 CST 17:50 Transmission watch issued due to forced extension of Eagle Pass DC Tie Watch Active
    Mar 13 2018 16:19:56 CST DC Tie Outage: The The South (Eagle Pass) DC Tie will be unavailable from 17:25 03/10/2018 through 18:00 03/14/2018 due to a forced outage. DC Tie will be unavailable from 17:25 03/10/2018 through 18:00 03/14/2018 due to a planned outage. Operational Information Active
    Mar 13 2018 12:09:48 CST DC-R tie (RAILROAD) will be de-rated to 150MW Friday 03/16/18 at 06:00 until 13:00. Operational Information Active
    Mar 13 2018 10:25:07 CST DC-R tie (RAILROAD) will be de-rated to 150MW Thursday 03/16/18 at 06:00 until 13:00. Operational Information Active
    Mar 13 2018 10:23:04 CST DC-R tie (RAILROAD) will be de-rated to 150MW Thursday 03/15/18 at 06:00 until 13:00. Operational Information Active
    Mar 13 2018 08:53:46 CST The Daily RSASM for Tuesday, March 13, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 13 2018 06:54:02 CST ERCOT will execute a SASM at 07:30 for operating day 03/13/2018 for 2 MW REGUP for HE10-15 and HE17-24. Total of 28mw. Operational Information Active
    Mar 13 2018 04:28:50 CST DC Tie Outage: The The South (Eagle Pass) DC Tie will be unavailable from 17:25 03/10/2018 through 16:00 03/13/2018 due to a forced outage. DC Tie will be unavailable from 17:25 03/10/2018 through 16:00 03/13/2018 due to a forced outage. Operational Information Active
    Mar 13 2018 00:58:17 CST No sudden loss of generation greater than 450 MW occurred on March 12, 2018 Operational Information Active
    Mar 12 2018 08:46:17 CST The Daily RSASM for Monday, March 12, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 12 2018 00:19:38 CST No sudden loss of generation greater than 450 MW occurred on March 11, 2018 Operational Information Active
    Mar 11 2018 16:54:53 CST DC Tie Outage: The South (Eagle Pass) DC Tie will be unavailable from 17:25 03/10/2018 through 16:00 03/12/2018 due to a forced outage. Operational Information Active
    Mar 11 2018 08:47:22 CST The Daily RSASM for Sunday, March 11, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 11 2018 03:54:22 CST ERCOT has cancelled the following notice: At 03:50, ERCOT is issuing a Watch due to HRUC not completing for HE05 due to timeline deviation. Operational Information Cancelled
    Mar 11 2018 03:51:17 CST At 03:50, ERCOT is issuing a Watch due to HRUC not completing for HE05 due to timeline deviation. Operational Information Active
    Mar 11 2018 00:23:34 CST No sudden loss of generation greater than 450 MW occurred on March 10, 2018 Operational Information Active
    Mar 11 2018 00:08:33 CST ERCOT has cancelled the following notice: At 17:25, ERCOT issued a Transmission Watch for the South DC Tie trip. This may result in the curtailment of DC-Tie exports to CENACE. Operational Information Cancelled
    Mar 11 2018 00:01:17 CST ERCOT has cancelled the following notice: At 17:25, ERCOT issued a Transmission Watch for the South DC Tie trip. This may result in the curtailment of DC-Tie exports to CENACE. Operational Information Cancelled
    Mar 10 2018 17:43:07 CST At 17:25, ERCOT issued a Transmission Watch for the South DC Tie trip. This may result in the curtailment of DC-Tie exports to CENACE. Operational Information Active
    Mar 10 2018 08:46:42 CST The Daily RSASM for Saturday, March 10, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 10 2018 02:57:44 CST No sudden loss of generation greater than 450 MW occurred on March 9, 2018 Operational Information Active
    Mar 09 2018 14:23:36 CST DAM is completed, DRUC will run at 15:30. Advisory for DAM failure cancelled at 14:21 . Operational Information Active
    Mar 09 2018 13:33:57 CST ERCOT has postponed the deadline for the posting of the DAM solution for operating day March 10, 2018 due to long internal price validation processing time. Advisory Active
    Mar 09 2018 08:48:57 CST The Daily RSASM for Friday, March 9, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 09 2018 04:55:54 CST ERCOT has cancelled the following notice: Ercot will be Operating from the Alternate Control Center until further Notice. Operational Information Cancelled
    Mar 09 2018 00:54:35 CST No sudden loss of generation greater than 450 MW occurred on March 8, 2018. Operational Information Active
    Mar 08 2018 16:35:14 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Mar 08, 2018 is available. Operational Instruction Active
    Mar 08 2018 08:47:50 CST The Daily RSASM for Thursday, March 8, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 08 2018 00:09:39 CST No sudden loss of generation greater than 450 MW occurred on March 7, 2018. Operational Information Active
    Mar 07 2018 16:45:28 CST DAM is completed, DRUC will run at 17:40. Advisory for DAM failure cancelled at 16:40. Operational Information Active
    Mar 07 2018 15:31:15 CST DAM is still running for OD Operating Day March 08, 2018 and estimated publish time is no earlier than 1600. Advisory Active
    Mar 07 2018 13:23:56 CST ERCOT has postponed the deadline for the posting of the DAM Solution for Operating Day March 08, 2018 due to long solution time. Advisory Active
    Mar 07 2018 08:50:32 CST The Daily RSASM for Wednesday March 7, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 07 2018 00:05:32 CST No sudden loss of generation greater than 450 MW occurred on March 6, 2018 Operational Information Active
    Mar 06 2018 08:46:35 CST The Daily RSASM for Tuesday March 6, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 06 2018 00:29:18 CST On Mar 5, 2018 a sudden loss of generation occurred at 06:51 totaling 515 MW. Frequency declined to 59.884 Hz, ERCOT load was 36, 041 MW. Operational Information Active
    Mar 05 2018 08:47:29 CST The Daily RSASM for Monday March 5, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 05 2018 07:31:18 CST The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Active
    Mar 05 2018 06:52:25 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Mar 05 2018 06:51:25 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Mar 05 2018 04:26:25 CST Ercot will be Operating from the Alternate Control Center until further Notice. Operational Information Active
    Mar 05 2018 02:15:53 CST No sudden loss of generation greater than 450 MW occurred on March 4, 2018 Operational Information Active
    Mar 04 2018 09:02:19 CST The Daily RSASM for Sunday, March 04, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 04 2018 04:15:39 CST No sudden loss of generation greater than 450 MW occurred on March 3, 2018 Operational Information Active
    Mar 03 2018 08:47:06 CST The Daily RSASM for Saturday, March 03, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 03 2018 02:32:12 CST No sudden loss of generation greater than 450 MW occurred on March 2, 2018 Operational Information Active
    Mar 03 2018 02:31:42 CST No sudden loss of generation greater than 450 MW occurred on March 2, 2018 Operational Information Active
    Mar 02 2018 08:51:13 CST The Daily RSASM for Friday, March 02, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 02 2018 01:07:36 CST No sudden loss of generation greater than 450 MW occurred on March 1, 2018. Operational Information Active
    Mar 01 2018 08:50:22 CST The Daily RSASM for Thursday, March 01, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Mar 01 2018 00:46:52 CST No sudden loss of generation greater than 450 MW occurred on February 28, 2018. Operational Information Active