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.

    Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018
    Date Message Type Status
    Aug 31 2018 15:52:31 CST ERCOT has cancelled the following notice: ERCOT is issuing a Transmission Watch for the trip of the South DC Tie Eagle Pass. Operational Information Cancelled
    Aug 31 2018 12:09:42 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 31 2018 12:09:06 CST ERCOT is issuing a Transmission Watch for the trip of the South DC Tie Eagle Pass. Operational Information Active
    Aug 31 2018 12:04:06 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 31 2018 08:48:05 CST The Daily RSASM for Friday, August 31, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 31 2018 00:05:55 CST No sudden loss of generation greater than 450 MW occurred on August 30, 2018. Operational Information Active
    Aug 30 2018 16:36:54 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Aug 30, 2018 is available. Operational Instruction Active
    Aug 30 2018 16:34:26 CST Notification of Market Price Correction: Market price correction for SCED. ERCOT has identified a need to perform a real-time market price correction due to a data error for SCED interval 0:00:27 on OD 8/29/2018. The impacted data was the State Estimator information for SCED during the single interval. This SCED interval covers Real-Time Market 15-min Settlement Interval Ending 0:15. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 4PM of 8/31/2018, Friday. Alert Active
    Aug 30 2018 08:51:32 CST The Daily RSASM for Thursday, August 30, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 30 2018 00:39:59 CST No sudden loss of generation greater than 450 MW occurred on August 29, 2018. Operational Information Active
    Aug 29 2018 18:22:10 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie has been derated to 170MW due to repairs until further notice. Operational Information Cancelled
    Aug 29 2018 09:24:56 CST ERCOT has cancelled the following notice: The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
    Aug 29 2018 08:47:33 CST The Daily RSASM for Wednesday, August 29, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 29 2018 00:15:29 CST No sudden loss of generation greater than 450 MW occurred on August 28, 2018. Operational Information Active
    Aug 28 2018 23:18:36 CST The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Active
    Aug 28 2018 10:20:39 CST ERCOT has cancelled the following notice: The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
    Aug 28 2018 08:46:37 CST The Daily RSASM for Tuesday, August 28, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 28 2018 00:22:36 CST No sudden loss of generation greater than 450 MW occurred on August 27, 2018. Operational Information Active
    Aug 28 2018 00:04:17 CST ERCOT has cancelled the following notice: Ercot issued a Transmission Watch for the South DC Tie(s) (DC R Railroad) due to Filter Issues causing the tie to be de-rated. Operational Information Cancelled
    Aug 27 2018 23:07:32 CST The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Active
    Aug 27 2018 22:02:26 CST Ercot issued a Transmission Watch for the South DC Tie(s) (DC R Railroad) due to Filter Issues causing the tie to be de-rated. Operational Information Active
    Aug 27 2018 18:17:30 CST ERCOT has been notified that the Railroad DC Tie has been derated to 170MW due to repairs until further notice. Operational Information Active
    Aug 27 2018 08:48:26 CST The Daily RSASM for Monday, August 27, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 27 2018 08:48:19 CST The Daily RSASM for Monday, August 27, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 27 2018 00:33:00 CST No sudden loss of generation greater than 450 MW occurred on August 26, 2018. Operational Information Active
    Aug 26 2018 10:33:41 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has extended a GMD Warning of K-7 until 8/26/2018 12:00 UTC. Operational Information Cancelled
    Aug 26 2018 10:33:36 CST ERCOT has cancelled the following notice: At 00:59 The Space Weather Prediction Center has issued a GMD Alert of K-7 G3 until 8/26/2018 05:00. Operational Information Cancelled
    Aug 26 2018 08:46:12 CST The Daily RSASM for Sunday, August 26, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 26 2018 03:39:05 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 until 8/26/2018 05:00. Operational Information Cancelled
    Aug 26 2018 02:57:33 CST The Space Weather Prediction Center has extended a GMD Warning of K-7 until 8/26/2018 12:00 UTC. Operational Information Active
    Aug 26 2018 02:51:14 CST The Space Weather Prediction Center has issued a GMD Warning of K-7 until 8/26/2018 012:00. Operational Information Active
    Aug 26 2018 01:23:58 CST At 00:59 The Space Weather Prediction Center has issued a GMD Alert of K-7 G3 until 8/26/2018 05:00. Operational Information Active
    Aug 26 2018 00:16:13 CST No sudden loss of generation greater than 450 MW occurred on August 25, 2018. Operational Information Active
    Aug 26 2018 00:05:28 CST The Space Weather Prediction Center has issued a GMD Warning of K-7 until 8/26/2018 05:00. Operational Information Active
    Aug 25 2018 08:46:09 CST The Daily RSASM for Saturday, August 25, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 25 2018 00:42:49 CST No sudden loss of generation greater than 450 MW occurred on August 24, 2018. Operational Information Active
    Aug 24 2018 08:46:25 CST The Daily RSASM for Friday, August 24, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 24 2018 00:16:22 CST No sudden loss of generation greater than 450 MW occurred on August 23, 2018. Operational Information Active
    Aug 23 2018 19:30:53 CST ERCOT has cancelled the following notice: UPDATE: ERCOT has been notified that the RAILROAD DC Tie has been derated to 170MW Import/Export due to filter issues until further notice. Operational Information Cancelled
    Aug 23 2018 08:48:30 CST The Daily RSASM for Thursday, August 23, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 23 2018 00:26:21 CST No sudden loss of generation greater than 450 MW occurred on August 22, 2018. Operational Information Active
    Aug 22 2018 08:49:00 CST The Daily RSASM for Wednesday August 22, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 22 2018 00:15:55 CST No sudden loss of generation greater than 450 MW occurred on August 21, 2018. Operational Information Active
    Aug 21 2018 08:52:27 CST The Daily RSASM for Tuesday August 21, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 21 2018 00:00:52 CST No sudden loss of generation greater than 450 MW occurred on August 20, 2018. Operational Information Active
    Aug 20 2018 18:24:35 CST ERCOT has cancelled the following notice: UPDATE: ERCOT has been notified that the RAILROAD DC Tie has been derated to 235MW Import/Export due to filter issues until further notice. Operational Information Cancelled
    Aug 20 2018 18:18:19 CST UPDATE: ERCOT has been notified that the RAILROAD DC Tie has been derated to 170MW Import/Export due to filter issues until further notice. Operational Information Active
    Aug 20 2018 17:28:25 CST UPDATE: ERCOT has been notified that the RAILROAD DC Tie has been derated to 235MW Import/Export due to filter issues until further notice. Operational Information Active
    Aug 20 2018 17:26:16 CST ERCOT has cancelled the following notice: ERCOT has been notified that the RAILROAD DC Tie has been derated to 170MW Import/Export due to filter issues until further notice. Operational Information Cancelled
    Aug 20 2018 14:42:48 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Aug 20, 2018 is available. Operational Instruction Active
    Aug 20 2018 08:51:52 CST The Daily RSASM for Monday August 20, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 20 2018 00:41:27 CST No sudden loss of generation greater than 450 MW occurred on August 19, 2018. Operational Information Active
    Aug 20 2018 00:41:22 CST No sudden loss of generation greater than 450 MW occurred on August 19, 2018. Operational Information Active
    Aug 19 2018 20:18:25 CST ERCOT has cancelled the following notice: The North DC Tie will be unavailable from 16:00 08/18/2018 through 23:00 08/19/2018 due to a forced outage. Operational Information Cancelled
    Aug 19 2018 08:47:31 CST The Daily RSASM for Sunday August 19, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 19 2018 05:06:00 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
    Aug 19 2018 02:57:55 CST On August 18, 2018 a sudden loss of generation occurred at 16:12 totaling 697 MW. Frequency declined to 59.853 Hz, ERCOT load was 68, 523 MW Operational Information Active
    Aug 18 2018 19:25:10 CST ERCOT has cancelled the following notice: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Cancelled
    Aug 18 2018 16:29:06 CST DC Tie Outage: The North DC Tie will be unavailable from 16:00 08/18/2018 through 23:00 08/19/2018 due to a forced outage. Operational Information Active
    Aug 18 2018 16:28:23 CST ERCOT has cancelled the following notice: The North DC Tie will be unavailable from 23:30 08/17/2018 through 16:00 08/18/2018 due to a forced outage. Operational Information Cancelled
    Aug 18 2018 16:16:09 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 18 2018 16:12:37 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 18 2018 15:03:56 CST Physical Responsive Capability < 3000 MW: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Active
    Aug 18 2018 12:19:44 CST ERCOT has been notified that the RAILROAD DC Tie has been derated to 170MW Import/Export due to filter issues until further notice. Operational Information Active
    Aug 18 2018 09:06:16 CST ERCOT has cancelled the following notice: Transmission Watch issued for DC Railroad Tie due to limitation Operational Information Cancelled
    Aug 18 2018 08:48:25 CST The Daily RSASM for Saturday August 18, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 18 2018 03:08:11 CST Transmission Watch issued for DC Railroad Tie due to limitation Operational Information Active
    Aug 18 2018 02:34:53 CST No sudden loss of generation greater than 450 MW occurred on August 17, 2018. Operational Information Active
    Aug 17 2018 23:37:31 CST DC Tie Outage: The North DC Tie will be unavailable from 23:30 08/17/2018 through 16:00 08/18/2018 due to a forced outage. Operational Information Active
    Aug 17 2018 08:48:05 CST The Daily RSASM for Friday, August 17, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 17 2018 01:03:26 CST No sudden loss of generation greater than 450 MW occurred on August 16, 2018. Operational Information Active
    Aug 16 2018 12:48:45 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 16 2018 12:44:37 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 16 2018 08:46:59 CST The Daily RSASM for Thursday, August 16, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 16 2018 00:14:00 CST On 08/15/2018 a sudden loss of generation occurred at 18:10 totaling 485MW. Frequency declined to 59.860Hz. ERCOT load was 66, 846MW. Operational Information Active
    Aug 15 2018 18:14:25 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 15 2018 18:10:49 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 15 2018 17:13:26 CST ERCOT has cancelled the following notice: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Cancelled
    Aug 15 2018 14:52:48 CST Physical Responsive Capability < 3000 MW: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Active
    Aug 15 2018 08:47:18 CST The Daily RSASM for Wednesday, August 15, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 15 2018 00:13:04 CST No sudden loss of generation greater than 450 MW occurred on August 14, 2018 Operational Information Active
    Aug 14 2018 08:47:22 CST The Daily RSASM for Tuesday, August 14, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 14 2018 00:18:13 CST On 08/13/2018 a sudden loss of generation occurred at 23:00 totaling 1200MW. Frequency declined to 59.795Hz.ERCOT load was 47, 390MW. Operational Information Active
    Aug 13 2018 23:03:38 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 13 2018 23:00:02 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 13 2018 08:46:31 CST The Daily RSASM for Monday, August 13, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 13 2018 00:00:13 CST No sudden loss of generation greater than 450 MW occurred on August 12, 2018. Operational Information Active
    Aug 12 2018 08:47:46 CST The Daily RSASM for Sunday, August 12, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 12 2018 00:00:17 CST No sudden loss of generation greater than 450 MW occurred on August 11, 2018. Operational Information Active
    Aug 11 2018 08:46:38 CST The Daily RSASM for Saturday, August 11, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 11 2018 01:39:51 CST No sudden loss of generation greater than 450 MW occurred on August 10, 2018. Operational Information Active
    Aug 10 2018 08:48:01 CST The Daily RSASM for Friday, August 10, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 10 2018 04:37:41 CST ERCOT is working from the primary control center. Operational Information Active
    Aug 10 2018 01:56:56 CST No sudden loss of generation greater than 450 MW occurred on August 9, 2018. Operational Information Active
    Aug 09 2018 21:44:52 CST ERCOT has cancelled the following notice: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Cancelled
    Aug 09 2018 15:14:11 CST Physical Responsive Capability < 3000 MW: ERCOT is issuing an Advisory due to Physical Responsive Capability being below 3000 MW Advisory Active
    Aug 09 2018 08:46:26 CST The Daily RSASM for Thursday, August 9, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 09 2018 02:14:13 CST No sudden loss of generation greater than 450 MW occurred on August 8, 2018. Operational Information Active
    Aug 08 2018 17:55:03 CST ERCOT has cancelled the following notice: ERCOT is issuing an OCN for 8/8/2018 for a projected Reserve Capacity Shortage for HE15 - HE18 Operational Information Cancelled
    Aug 08 2018 08:47:56 CST The Daily RSASM for Wednesday, August 8, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 08 2018 03:44:48 CST ERCOT is issuing an OCN for 8/8/2018 for a projected Reserve Capacity Shortage for HE15 - HE18 Operational Information Active
    Aug 08 2018 01:54:52 CST No sudden loss of generation greater than 450 MW occurred on August 7, 2018. Operational Information Active
    Aug 07 2018 08:47:41 CST The Daily RSASM for Tuesday, August 7, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 07 2018 01:32:21 CST No sudden loss of generation greater than 450 MW occurred on August 6, 2018. Operational Information Active
    Aug 06 2018 08:47:16 CST The Daily RSASM for Monday, August 6, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 06 2018 01:37:19 CST No sudden loss of generation greater than 450 MW occurred on August 5, 2018. Operational Information Active
    Aug 05 2018 08:49:33 CST The Daily RSASM for Sunday, August 5, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 05 2018 00:47:58 CST No sudden loss of generation greater than 450 MW occurred on August 4, 2018. Operational Information Active
    Aug 04 2018 08:45:02 CST The Daily RSASM for Saturday, August 4, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 04 2018 08:24:03 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
    Aug 04 2018 08:20:39 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
    Aug 04 2018 00:05:25 CST No sudden loss of generation greater than 450 MW occurred on August 3, 2018. Operational Information Active
    Aug 03 2018 08:45:21 CST The Daily RSASM for Friday, August 3, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 03 2018 00:02:57 CST No sudden loss of generation greater than 450 MW occurred on August 2, 2018. Operational Information Active
    Aug 02 2018 19:10:47 CST ERCOT has cancelled the following notice: ERCOT is issuing an OCN for a projected reserve capacity shortage on 08/02/2018 for hours ending 15:00 through 19:00. ERCOT is requesting all QSE's to update their COPs. Operational Information Cancelled
    Aug 02 2018 17:14:51 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Aug 02, 2018 is available. Operational Instruction Active
    Aug 02 2018 08:46:07 CST The Daily RSASM for Thursday, August 2, 2018 will not be occurring due to zero participating QSEs Operational Information Active
    Aug 02 2018 00:00:45 CST No sudden loss of generation greater than 450 MW occurred on August 1, 2018. Operational Information Active
    Aug 01 2018 21:59:22 CST ERCOT is issuing an OCN for a projected reserve capacity shortage on 08/02/2018 for hours ending 15:00 through 19:00. ERCOT is requesting all QSE's to update their COPs. Operational Information Active
    Aug 01 2018 21:47:37 CST ERCOT has cancelled the following notice: ERCOT is issuing an OCN for a projected reserve capacity shortage for hours ending 15:00 through 20:00. ERCOT is requesting all QSE's to update their COPs. OCN Cancelled
    Aug 01 2018 09:41:16 CST ERCOT will execute a SASM at 10:15 for operating day 08/01/2018 for HE 14-19 for REGUP 2 MWs. Operational Information Active
    Aug 01 2018 08:52:59 CST The Daily RSASM for Wednesday, August 1, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
    Aug 01 2018 06:04:20 CST ERCOT has cancelled the following notice: Transmission Watch for the Railroad DC tie due to tie limitations that will result in schedule curtailments. Operational Information Cancelled
    Aug 01 2018 02:36:27 CST Capacity Insufficiency: ERCOT is issuing an OCN for a projected reserve capacity shortage for hours ending 15:00 through 20:00. ERCOT is requesting all QSE's to update their COPs. OCN Active
    Aug 01 2018 00:00:12 CST No sudden loss of generation greater than 450 MW occurred on July 31, 2018. Operational Information Active