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.

Oct 2018 Nov 2018 Dec 2018 Jan 2019 Feb 2019 Mar 2019
Date Message Type Status
Mar 26 2019 00:01:23 CST No sudden loss of generation greater than 450 MW occurred on March 25, 2019. Operational Information Active
Mar 25 2019 10:06:41 CST The Eskota RAS has been taken out of service/removed from RTCA. Operational Information Active
Mar 25 2019 09:13:02 CST The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Active
Mar 25 2019 08:47:04 CST The Daily RSASM for Monday, March 25, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 25 2019 00:13:07 CST No sudden loss of generation greater than 450 MW occurred on March 24, 2019. Operational Information Active
Mar 24 2019 15:13:55 CST ERCOT has cancelled the following notice: The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
Mar 24 2019 08:48:05 CST The Daily RSASM for Sunday, March 24, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 24 2019 01:04:18 CST No sudden loss of generation greater than 450 MW occurred on March 23, 2019. Operational Information Active
Mar 23 2019 15:59:02 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:15 for operating day 03/23/2019 for HE 03-07 for 37 MW of RRS. Operational Information Cancelled
Mar 23 2019 08:46:34 CST The Daily RSASM for Saturday, March 23, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 23 2019 02:36:22 CST No sudden loss of generation greater than 450 MW occurred on March 22, 2019. Operational Information Active
Mar 22 2019 23:31:26 CST ERCOT will execute a SASM at 01:15 for operating day 03/23/2019 for HE 03-07 for 37 MW of RRS. Operational Information Active
Mar 22 2019 14:36:25 CST ERCOT has cancelled the following notice: The Eskota RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
Mar 22 2019 08:47:08 CST The Daily RSASM for Friday, March 22, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 22 2019 07:23:36 CST DC Tie Outage: The Railroad DC Tie will be unavailable from 07:00 03/24/2019 through 17:00 03/30/2019 due to a planned outage. Operational Information Active
Mar 22 2019 00:10:28 CST On 03/21/19, a sudden loss of generation occurred at 13:39 totaling 651MW. Frequency declined to 59.865Hz, ERCOT load was 3594MW. Operational Information Active
Mar 21 2019 15:55:10 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Mar 21, 2019 is available. Operational Instruction Active
Mar 21 2019 13:44:06 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Mar 21 2019 13:40:02 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Mar 21 2019 08:46:12 CST The Daily RSASM for Thursday, March 21, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 21 2019 00:18:26 CST No sudden loss of generation greater than 450 MW occurred on March 20, 2019. Operational Information Active
Mar 20 2019 10:12:18 CST Eagle Pass DC Tie will be unavailable due to planned plant maintenance from 3/25/2019 19:00 till 3/28/2019 16:00. Operational Information Active
Mar 20 2019 08:52:20 CST The Daily RSASM for Wednesday March 20, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 20 2019 01:30:04 CST ERCOT has cancelled the following notice: ERCOT has issued a Watch for HRUC timeline Deviation for HE02. Operational Information Cancelled
Mar 20 2019 00:53:16 CST ERCOT has issued a Watch for HRUC timeline Deviation for HE02. Operational Information Active
Mar 20 2019 00:31:03 CST No sudden loss of generation greater than 450 MW occurred on March 19, 2019. Operational Information Active
Mar 19 2019 08:47:09 CST The Daily RSASM for Tuesday March 19, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 19 2019 07:18:36 CST The Barney Davis RAS has been taken out of service/removed from RTCA. Operational Information Active
Mar 19 2019 00:23:09 CST No sudden loss of generation greater than 450 MW occurred on March 18, 2019. Operational Information Active
Mar 18 2019 09:04:30 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for planned Calavers/Skyline 345 kv line outage. Operational Information Cancelled
Mar 18 2019 08:47:08 CST The Daily RSASM for Monday March 18, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 18 2019 08:44:19 CST ERCOT is taking manual actions to pre-posture for planned Calavers/Skyline 345 kv line outage. Operational Information Active
Mar 18 2019 08:42:37 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 18 2019 08:39:34 CST At 3:25 PM on 03/18/2019, ERCOT will perform site failover of its Energy Market Management Systems. During this time, market communications will be unavailable for about 20 minutes, and real-time communications will be unavailable for about 5 minutes. All systems should re-establish communications automatically. This event will be preceded by a "hot line" call shortly before beginning. Operational Information Active
Mar 18 2019 08:32:12 CST The Eskota RAS has been taken out of service/removed from RTCA. Operational Information Active
Mar 18 2019 07:24:36 CST The Railroad DC tie is limited to 150 MW thru April 5, 2019 at 19:00 due to a Planned Maintenance Outage. Operational Information Active
Mar 18 2019 00:03:59 CST No sudden loss of generation greater than 450 MW occurred on March 17, 2019. Operational Information Active
Mar 17 2019 15:59:21 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 10:33 03/14/2019 through 11:00 03/14/2019 due to a forced outage. Operational Information Cancelled
Mar 17 2019 15:59:14 CST ERCOT has cancelled the following notice: The DC_L DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. DC Tie Curtailment Notice Cancelled
Mar 17 2019 15:59:04 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 12:00 03/14/2019 through 13:00 03/14/2019 due to a forced outage. Operational Information Cancelled
Mar 17 2019 15:58:52 CST ERCOT has cancelled the following notice: The DC_L DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. DC Tie Curtailment Notice Cancelled
Mar 17 2019 15:58:43 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 13:00 03/14/2019 through 15:31 03/14/2019 due to a forced outage. Operational Information Cancelled
Mar 17 2019 08:48:30 CST The Daily RSASM for Sunday, March 17, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 17 2019 00:41:47 CST No sudden loss of generation greater than 450 MW occurred on March 16, 2019. Operational Information Active
Mar 16 2019 08:47:04 CST The Daily RSASM for Saturday, March 16, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 16 2019 00:00:33 CST No sudden loss of generation greater than 450 MW occurred on March 15, 2019. Operational Information Active
Mar 15 2019 08:49:41 CST The Daily RSASM for Friday, March 15, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 15 2019 01:45:18 CST No sudden loss of generation greater than 450 MW occurred on March 14, 2019. Operational Information Active
Mar 14 2019 15:38:20 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 13:00 03/14/2019 through 15:31 03/14/2019 due to a forced outage. Operational Information Active
Mar 14 2019 15:36:42 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 13:00 03/14/2019 through 23:00 03/14/2019 due to a forced outage. Operational Information Cancelled
Mar 14 2019 13:00:45 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 13:00 03/14/2019 through 23:00 03/14/2019 due to a forced outage. Operational Information Active
Mar 14 2019 11:49:52 CST DC Tie Curtailment Notice: The DC_L DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. DC Tie Curtailment Notice Active
Mar 14 2019 11:48:51 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 12:00 03/14/2019 through 13:00 03/14/2019 due to a forced outage. Operational Information Active
Mar 14 2019 10:57:22 CST DC Tie Curtailment Notice: The DC_L DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. DC Tie Curtailment Notice Active
Mar 14 2019 10:50:44 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 10:33 03/14/2019 through 11:00 03/14/2019 due to a forced outage. Operational Information Active
Mar 14 2019 08:48:02 CST The Daily RSASM for Thursday, March 14, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 14 2019 01:18:36 CST No sudden loss of generation greater than 450 MW occurred on March 13, 2019. Operational Information Active
Mar 13 2019 18:31:12 CST ERCOT has cancelled the following notice: The Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Cancelled
Mar 13 2019 17:28:34 CST DC Tie Curtailment Notice: The Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Active
Mar 13 2019 09:09:34 CST ERCOT has cancelled the following notice: The Barney RAS has been disabled for relay maintenance. Operational Information Cancelled
Mar 13 2019 09:04:01 CST ERCOT has cancelled the following notice: ERCOT is issuing a Advisory due to severe weather in the Central and North Texas areas. If you experience any issues as a direct result of the weather event, notify ERCOT. Delay any planned or maintenance outages until the storm passes. Operational Information Cancelled
Mar 13 2019 09:03:44 CST ERCOT has cancelled the following notice: ERCOT is issuing a Advisory due to severe weather in the Central and North Texas areas. If you experience any issues as a direct result of the weather event, notify ERCOT. Delay any planned or maintenance outages until the storm passes. Operational Information Cancelled
Mar 13 2019 08:46:52 CST The Daily RSASM for Wednesday, March 13, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 13 2019 08:05:32 CST The Barney RAS has been disabled for relay maintenance. Operational Information Active
Mar 13 2019 05:57:44 CST ERCOT is issuing a Advisory due to severe weather in the Central and North Texas areas. If you experience any issues as a direct result of the weather event, notify ERCOT. Delay any planned or maintenance outages until the storm passes. Operational Information Active
Mar 13 2019 01:13:58 CST No sudden loss of generation greater than 450 MW occurred on March 12, 2019. Operational Information Active
Mar 12 2019 08:46:20 CST The Daily RSASM for Tuesday, March 12, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 12 2019 00:10:36 CST On March 11, 2019, a sudden loss of generation occurred at 21:49 totaling 612 MW. Frequency declined to 59.823 Hz, ERCOT load was 39, 378 MW. Operational Information Active
Mar 11 2019 21:28:25 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Mar 11 2019 21:24:09 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Mar 11 2019 08:46:38 CST The Daily RSASM for Monday, March 11, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 11 2019 00:01:57 CST No sudden loss of generation greater than 450 MW occurred on March 10, 2019. Operational Information Active
Mar 10 2019 08:46:41 CST The Daily RSASM for Sunday, March 10, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 10 2019 00:00:11 CST No sudden loss of generation greater than 450 MW occurred on March 9, 2019. Operational Information Active
Mar 09 2019 08:48:43 CST The Daily RSASM for Saturday, March 9, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 09 2019 00:11:42 CST No sudden loss of generation greater than 450 MW occurred on March 8, 2019. Operational Information Active
Mar 08 2019 08:46:10 CST The Daily RSASM for Friday, March 8, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 08 2019 04:28:09 CST ERCOT is working from primary control center. Operational Information Active
Mar 08 2019 04:27:54 CST ERCOT has cancelled the following notice: As of 16:22, ERCOT will be operating out of their alternate control center, until further notice. Operational Information Cancelled
Mar 08 2019 01:21:27 CST No sudden loss of generation greater than 450 MW occurred on March 7, 2019. Operational Information Active
Mar 07 2019 21:05:13 CST As of 16:22, ERCOT will be operating out of their alternate control center, until further notice. Operational Information Active
Mar 07 2019 17:09:52 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Mar 07, 2019 is available. Operational Instruction Active
Mar 07 2019 08:46:42 CST The Daily RSASM for Thursday, March 7, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Mar 07 2019 00:21:31 CST No sudden loss of generation greater than 450 MW occurred on March 6, 2019. Operational Information Active
Mar 07 2019 00:17:39 CST No sudden loss of generation greater than 450 MW occurred on March 6, 2019. Operational Information Active
Mar 06 2019 13:00:33 CST ERCOT has cancelled the following notice: At 12:00 ERCOT is issuing an OCN for a potential extreme cold weather system for early March impacting the ERCOT region from 03/03/19-03/07/19. Operational Information Cancelled
Mar 06 2019 08:49:33 CST The Daily RSASM for Wednesday, March 6, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 06 2019 00:21:00 CST No sudden loss of generation greater than 450 MW occurred on March 5, 2019. Operational Information Active
Mar 05 2019 08:48:15 CST The Daily RSASM for Tuesday, March 5, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 05 2019 00:31:24 CST On March 4, 2019, a sudden loss of generation occurred at 20:11 totaling 452 MW. Frequency declined to 59.930 Hz, ERCOT load was 50, 641 MW. Operational Information Active
Mar 04 2019 08:48:29 CST The Daily RSASM for Monday, March 4, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 04 2019 00:01:07 CST No sudden loss of generation greater than 450 MW occurred on March 3, 2019. Operational Information Active
Mar 03 2019 08:45:30 CST The Daily RSASM for Sunday, March 3, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 03 2019 00:02:14 CST On March 2, 2019, a sudden loss of generation occurred at 03:19 totaling 1212 MW. Frequency declined to 59.774 Hz, ERCOT load was 33, 942 MW. Operational Information Active
Mar 02 2019 08:46:37 CST The Daily RSASM for Saturday, March 2, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 02 2019 03:24:33 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Mar 02 2019 03:18:57 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Mar 02 2019 00:28:59 CST No sudden loss of generation greater than 450 MW occurred on March 1, 2019. Operational Information Active
Mar 01 2019 08:47:11 CST The Daily RSASM for Friday, March 1, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Mar 01 2019 00:00:44 CST No sudden loss of generation greater than 450 MW occurred on February 28, 2019. Operational Information Active