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
Dec 31 2018 08:48:56 CST The Daily RSASM for Monday, December 31, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 31 2018 00:37:20 CST No sudden loss of generation greater than 450 MW occurred on December 30, 2018 Operational Information Active
Dec 30 2018 14:27:06 CST At 1430, ERCOT is issuing an OCN for a potential extreme cold weather system with the possibility of frozen precipitation approaching the ERCOT region from 01/02/19 to 01/03/19. Operational Information Active
Dec 30 2018 08:46:07 CST The Daily RSASM for Sunday, December 30, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 30 2018 01:32:34 CST No sudden loss of generation greater than 450 MW occurred on December 29, 2018. Operational Information Active
Dec 29 2018 08:46:58 CST The Daily RSASM for Saturday, December 29, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 29 2018 00:08:37 CST No sudden loss of generation greater than 450 MW occurred on December 28, 2018. Operational Information Active
Dec 28 2018 08:46:25 CST The Daily RSASM for Friday, December 28, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 28 2018 00:39:23 CST No sudden loss of generation greater than 450 MW occurred on December 27, 2018. Operational Information Active
Dec 27 2018 15:01:22 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Dec 27, 2018 is available. Operational Instruction Active
Dec 27 2018 08:46:18 CST The Daily RSASM for Thursday, December 27, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 27 2018 01:20:19 CST On 12/26/2018 a sudden loss of generation occurred at 09:24 totaling 502 MW. Frequency declined to 59.887 Hz, ERCOT load was 37, 222 MW. Operational Information Active
Dec 26 2018 09:27:26 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Dec 26 2018 09:24:18 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Dec 26 2018 08:47:35 CST The Daily RSASM for Wednesday December 26, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 26 2018 07:38:27 CST No sudden loss of generation greater than 450 MW occurred on December 25, 2018. Operational Information Active
Dec 25 2018 16:04:44 CST No sudden loss of generation greater than 450 MW occurred on December 24, 2018. Operational Information Active
Dec 25 2018 08:47:52 CST The Daily RSASM for Tuesday December 25, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 24 2018 08:47:04 CST The Daily RSASM for Monday December 24, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 24 2018 00:25:27 CST On 12/23/2018 a sudden loss of generation occurred at 06:53 totaling 852 MW. Frequency declined to 59.823 Hz, ERCOT load was 35, 508 MW. Operational Information Active
Dec 23 2018 08:47:06 CST The Daily RSASM for Sunday, December 23, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 23 2018 06:56:50 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Dec 23 2018 06:53:18 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Dec 23 2018 01:43:33 CST No sudden loss of generation greater than 450 MW occurred on December 22, 2018. Operational Information Active
Dec 22 2018 08:49:27 CST The Daily RSASM for Saturday, December 22, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 22 2018 00:56:33 CST No sudden loss of generation greater than 450 MW occurred on December 21, 2018. Operational Information Active
Dec 21 2018 15:52:56 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 20:22 12/19/2018 through 16:00 12/21/2018 due to a forced outage. Operational Information Cancelled
Dec 21 2018 08:48:22 CST The Daily RSASM for Friday, December 21, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 21 2018 01:50:41 CST No sudden loss of generation greater than 450 MW occurred on December 20, 2018. Operational Information Active
Dec 20 2018 18:17:08 CST ERCOT has cancelled the following notice: The B_DAVIS RAS is out of service. Operational Information Cancelled
Dec 20 2018 16:23:49 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 20:22 12/19/2018 through 16:00 12/21/2018 due to a forced outage. Operational Information Active
Dec 20 2018 16:21:46 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 20:22 12/19/2018 through 17:00 12/20/2018 due to a forced outage. Operational Information Cancelled
Dec 20 2018 08:50:46 CST The Daily RSASM for Thursday, December 20, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 20 2018 08:02:30 CST ERCOT has cancelled the following notice: The Laredo 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
Dec 20 2018 00:02:14 CST No sudden loss of generation greater than 450 MW occurred on December 19, 2018. Operational Information Active
Dec 20 2018 00:01:15 CST ERCOT has cancelled the following notice: The Laredo 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
Dec 20 2018 00:00:53 CST DC Tie Curtailment Notice: The Laredo 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
Dec 19 2018 20:43:14 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 20:22 12/19/2018 through 17:00 12/20/2018 due to a forced outage. Operational Information Active
Dec 19 2018 20:24:12 CST DC Tie Curtailment Notice: The Laredo 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
Dec 19 2018 13:52:37 CST D.A.M. is completed, DRUC will begin at 14:45 Advisory Active
Dec 19 2018 12:30:58 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
Dec 19 2018 08:46:39 CST The Daily RSASM for Wednesday, December 19, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 19 2018 07:41:23 CST The B_DAVIS RAS is out of service. Operational Information Active
Dec 19 2018 00:15:38 CST No sudden loss of generation greater than 450 MW occurred on December 18, 2018. Operational Information Active
Dec 18 2018 16:14:52 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 00:00 12/18/2018 through 17:00 12/18/2018 due to a forced outage. Operational Information Cancelled
Dec 18 2018 12:33:34 CST ERCOT has cancelled the following notice: The East DC Tie will be unavailable from 11:50 12/18/2018 through 18:00 12/18/2018 due to a forced outage. Operational Information Cancelled
Dec 18 2018 11:50:35 CST DC Tie Outage: The East DC Tie will be unavailable from 11:50 12/18/2018 through 18:00 12/18/2018 due to a forced outage. Operational Information Active
Dec 18 2018 11:49:41 CST ERCOT has cancelled the following notice: The East DC Tie will be unavailable from 21:10 11/16/2018 through 12:00 12/18/2018 due to a forced outage. Operational Information Cancelled
Dec 18 2018 01:51:29 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 00:00 12/18/2018 through 17:00 12/18/2018 due to a forced outage. Operational Information Active
Dec 18 2018 00:07:21 CST No sudden loss of generation greater than 450 MW occurred on December 17, 2018. Operational Information Active
Dec 18 2018 00:01:29 CST ERCOT has cancelled the following notice: The Laredo 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
Dec 17 2018 23:28:46 CST DC Tie Curtailment Notice: The Laredo 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
Dec 17 2018 11:39:07 CST ERCOT has cancelled the following notice: The Laredo (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
Dec 17 2018 11:38:54 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 02:05 12/16/2018 through 12:00 12/17/2018 due to a forced outage. Operational Information Cancelled
Dec 17 2018 08:46:31 CST The Daily RSASM for Monday, December 17, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 17 2018 00:00:12 CST No sudden loss of generation greater than 450 MW occurred on December 16, 2018. Operational Information Active
Dec 16 2018 11:59:54 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 02:05 12/16/2018 through 12:00 12/17/2018 due to a forced outage. Operational Information Active
Dec 16 2018 11:58:25 CST ERCOT has cancelled the following notice: The laredo (DC_L) DC Tie will be unavailable from 02:05 12/16/2018 through 12:00 12/16/2018 due to a forced outage. Operational Information Cancelled
Dec 16 2018 08:47:05 CST The Daily RSASM for Sunday, December 16, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 16 2018 03:53:05 CST DC Tie Curtailment Notice: The Laredo (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
Dec 16 2018 03:46:13 CST DC Tie Outage: The laredo (DC_L) DC Tie will be unavailable from 02:05 12/16/2018 through 12:00 12/16/2018 due to a forced outage. Operational Information Active
Dec 16 2018 03:44:44 CST ERCOT has cancelled the following notice: The Laredo (DC_L) DC Tie will be unavailable from 02:05 12/16/2018 through 08:00 12/16/2018 due to a forced outage. Operational Information Cancelled
Dec 16 2018 02:25:28 CST DC Tie Outage: The Laredo (DC_L) DC Tie will be unavailable from 02:05 12/16/2018 through 08:00 12/16/2018 due to a forced outage. Operational Information Active
Dec 16 2018 00:05:17 CST No sudden loss of generation greater than 450 MW occurred on December 15, 2018. Operational Information Active
Dec 15 2018 08:47:33 CST The Daily RSASM for Saturday, December 15, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 15 2018 00:01:11 CST No sudden loss of generation greater than 450 MW occurred on December 14, 2018. Operational Information Active
Dec 14 2018 12:51:45 CST DC Tie Outage: The East DC Tie will be unavailable from 21:10 11/16/2018 through 12:00 12/18/2018 due to a forced outage. Operational Information Active
Dec 14 2018 12:49:59 CST ERCOT has cancelled the following notice: The East DC Tie will be unavailable from 21:10 11/16/2018 through 16:00 12/14/2018 due to a forced outage. Operational Information Cancelled
Dec 14 2018 08:47:18 CST The Daily RSASM for Friday, December 14, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 14 2018 01:54:38 CST No sudden loss of generation greater than 450 MW occurred on December 13, 2018. Operational Information Active
Dec 13 2018 08:48:20 CST The Daily RSASM for Thursday, December 13, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 13 2018 01:39:03 CST No sudden loss of generation greater than 450 MW occurred on December 12, 2018. Operational Information Active
Dec 12 2018 14:45:38 CST ERCOT has cancelled the following notice: The Laredo (DC_L) DC Tie will be unavailable from 02:20 12/10/2018 through 17:00 12/14/2018 due to a forced outage. Operational Information Cancelled
Dec 12 2018 08:48:49 CST The Daily RSASM for Wednesday, December 12, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 12 2018 00:42:51 CST No sudden loss of generation greater than 450 MW occurred on December 11, 2018. Operational Information Active
Dec 11 2018 08:47:47 CST The Daily RSASM for Tuesday, December 11, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 11 2018 00:33:50 CST No sudden loss of generation greater than 450 MW occurred on December 10, 2018. Operational Information Active
Dec 11 2018 00:20:23 CST ERCOT has cancelled the following notice: The Railroad 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
Dec 11 2018 00:05:31 CST ERCOT has cancelled the following notice: The Laredo (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
Dec 11 2018 00:01:33 CST DC Tie Curtailment Notice: The Railroad 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
Dec 10 2018 10:54:26 CST ERCOT has cancelled the following notice: The Laredo 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
Dec 10 2018 10:54:03 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 02:32 12/10/2018 through 12:00 12/10/2018 due to a forced outage. Operational Information Cancelled
Dec 10 2018 10:53:10 CST DC Tie Curtailment Notice: The Laredo (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
Dec 10 2018 10:51:46 CST DC Tie Outage: The Laredo (DC_L) DC Tie will be unavailable from 02:20 12/10/2018 through 17:00 12/14/2018 due to a forced outage. Operational Information Active
Dec 10 2018 08:49:16 CST The Daily RSASM for Monday, December 10, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 10 2018 02:58:55 CST DC Tie Curtailment Notice: The Laredo 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
Dec 10 2018 02:58:02 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 02:32 12/10/2018 through 12:00 12/10/2018 due to a forced outage. Operational Information Active
Dec 10 2018 00:03:01 CST No sudden loss of generation greater than 450 MW occurred on December 09, 2018. Operational Information Active
Dec 09 2018 12:55:33 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 02:10 12/09/2018 through 16:00 12/09/2018 due to a forced outage. Operational Information Cancelled
Dec 09 2018 12:55:22 CST ERCOT has cancelled the following notice: The Laredo 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
Dec 09 2018 12:28:00 CST ERCOT has cancelled the following notice: The Eskota Sw RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
Dec 09 2018 12:27:50 CST ERCOT has cancelled the following notice: The Eskota Sw RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
Dec 09 2018 08:44:51 CST The Daily RSASM for Sunday, December 9, 2018 will not be occurring due to zero participating QSEs Operational Information Active
Dec 09 2018 03:07:45 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 02:10 12/09/2018 through 16:00 12/09/2018 due to a forced outage. Operational Information Active
Dec 09 2018 03:06:31 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 02:10 12/09/2018 through 23:59 12/09/2018 due to a forced outage. Operational Information Cancelled
Dec 09 2018 03:05:28 CST DC Tie Curtailment Notice: The Laredo 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
Dec 09 2018 02:33:09 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 02:10 12/09/2018 through 23:59 12/09/2018 due to a forced outage. Operational Information Active
Dec 09 2018 00:27:10 CST No sudden loss of generation greater than 450 MW occurred on December 08, 2018. Operational Information Active
Dec 08 2018 09:13:27 CST ERCOT has cancelled the following notice: UPDATE, new return date: The East DC Tie will be unavailable from 21:10 11/16/2018 through 16:00 12/10/2018 due to a forced outage. Operational Information Cancelled
Dec 08 2018 09:12:19 CST DC Tie Outage: The East DC Tie will be unavailable from 21:10 11/16/2018 through 16:00 12/14/2018 due to a forced outage. Operational Information Active
Dec 08 2018 08:47:14 CST The Daily RSASM for Saturday, December 8, 2018 will not be occurring due to zero participating QSEs Operational Information Active
Dec 08 2018 00:30:56 CST No sudden loss of generation greater than 450 MW occurred on December 07, 2018. Operational Information Active
Dec 07 2018 10:52:06 CST The Eskota Sw RAS has been taken out of service/removed from RTCA. Operational Information Active
Dec 07 2018 08:45:17 CST The Daily RSASM for Friday, December 7, 2018 will not be occurring due to zero participating QSEs Operational Information Active
Dec 07 2018 04:39:04 CST Ercot working from Primary Control Center. Use OPX numbers for Taylor. Operational Information Active
Dec 07 2018 00:00:16 CST No sudden loss of generation greater than 450 MW occurred on December 06, 2018. Operational Information Active
Dec 06 2018 15:13:12 CST At 14:23 on 12/06/2018 the Eagle Pass DC Tie outage has ended and is back in service. Operational Information Active
Dec 06 2018 08:45:11 CST The Daily RSASM for Thursday, December 6, 2018 will not be occurring due to zero participating QSEs Operational Information Active
Dec 06 2018 00:00:11 CST No sudden loss of generation greater than 450 MW occurred on December 05, 2018. Operational Information Active
Dec 05 2018 08:46:20 CST The Daily RSASM for Wednesday, December 5, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 05 2018 00:01:41 CST No sudden loss of generation greater than 450 MW occurred on December 04, 2018. Operational Information Active
Dec 04 2018 08:46:18 CST The Daily RSASM for Tuesday, December 4, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 04 2018 00:00:10 CST No sudden loss of generation greater than 450 MW occurred on December 03, 2018. Operational Information Active
Dec 03 2018 16:26:43 CST ERCOT has cancelled the following notice: At 3:25 PM on 12/03/2018, 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 Cancelled
Dec 03 2018 16:03:38 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Dec 03 2018 15:42:22 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Dec 03 2018 12:07:26 CST At 3:25 PM on 12/03/2018, 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
Dec 03 2018 08:52:49 CST The Daily RSASM for Monday, December 3, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 03 2018 00:25:13 CST On 12/02/2018 a sudden loss of generation occurred at 00:34 totaling 483 MW. Frequency declined to 59.911 Hz, ERCOT load was 30, 227 MW. Operational Information Active
Dec 02 2018 16:51:51 CST ERCOT has cancelled the following notice: ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Cancelled
Dec 02 2018 08:47:04 CST The Daily RSASM for Sunday, December 2, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 02 2018 00:01:03 CST No sudden loss of generation greater than 450 MW occurred on December 01, 2018. Operational Information Active
Dec 01 2018 16:21:04 CST ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Dec 01 2018 08:48:06 CST The Daily RSASM for Saturday, December 1, 2018 will not be occurring due to zero participating QSEs. Operational Information Active
Dec 01 2018 00:39:36 CST No sudden loss of generation greater than 450 MW occurred on November 30, 2018. Operational Information Active