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.

Dec 2018 Jan 2019 Feb 2019 Mar 2019 Apr 2019 May 2019
Date Message Type Status
May 15 2019 08:45:58 CST The Daily RSASM for Wednesday May 15, 2019 will not be occurring due to zero participating QSEs Operational Information Active
May 15 2019 00:16:58 CST No sudden loss of generation greater than 450 MW occurred on May 14, 2019. Operational Information Active
May 15 2019 00:09:34 CST ERCOT has cancelled the following notice: The Laredo 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
May 14 2019 22:34:20 CST DC Tie Curtailment Notice: The Laredo 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
May 14 2019 16:25:33 CST DC_L Tie has a limit of 90MW until further notice. Operational Information Active
May 14 2019 13:46:30 CST DAM is complete, DRUC will begin at 14:45 Operational Information Active
May 14 2019 13:25:50 CST ERCOT has postponed the deadline for posting of the DAM Solution for Operating Day May 15th, 2019 due to an internal issue, which is being resolved. The delay is anticipated for 15 minutes. Advisory Active
May 14 2019 08:48:33 CST The Daily RSASM for Tuesday May 14, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 14 2019 07:05:53 CST ERCOT has cancelled the following notice: Advisory issued for a geomagnetic disturbance of K-7 until May 14, 2019 1200 UTC. Operational Information Cancelled
May 14 2019 04:21:09 CST Advisory issued for a geomagnetic disturbance of K-7 until May 14, 2019 1200 UTC. Operational Information Active
May 14 2019 04:19:53 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Alert of K-7 until May 14, 2019 @ 1200 UTC. Operational Information Cancelled
May 14 2019 03:58:01 CST The Space Weather Prediction Center has issued a GMD Alert of K-7 until May 14, 2019 @ 1200 UTC. Operational Information Active
May 14 2019 00:47:33 CST No sudden loss of generation greater than 450 MW occurred on May 13, 2019. Operational Information Active
May 13 2019 16:35:23 CST ERCOT has cancelled the following notice: At 3:25 PM on 05/13/2019, 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 Cancelled
May 13 2019 10:10:34 CST At 3:25 PM on 05/13/2019, 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
May 13 2019 08:47:52 CST The Daily RSASM for Monday May 13, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 13 2019 00:21:49 CST No sudden loss of generation greater than 450 MW occurred on May 12, 2019. Operational Information Active
May 12 2019 08:58:39 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 12 2019 08:57:23 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 12 2019 08:53:31 CST The Daily RSASM for Sunday May 12, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 12 2019 00:57:58 CST No sudden loss of generation greater than 450 MW occurred on May 11, 2019. Operational Information Active
May 11 2019 22:14:45 CST ERCOT has cancelled the following notice: The Railroad DC Tie will be unavailable from 08:00 05/10/2019 through 17:00 05/11/2019 due to a planned outage. Operational Information Cancelled
May 11 2019 14:14:01 CST ERCOT has cancelled the following notice: The Railroad DC Tie will be unavailable from 08:00 05/10/2019 through 17:00 05/11/2019 due to a planned outage. Operational Information Cancelled
May 11 2019 08:48:36 CST The Daily RSASM for Saturday May 11, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 11 2019 01:16:16 CST No sudden loss of generation greater than 450 MW occurred on May 10, 2019. Operational Information Active
May 11 2019 01:00:35 CST ERCOT will execute a SASM at 01:35 for operating day Saturday, MAY 11, 2019 for 2MW of REGUP for HE06 through 10 and HE16 through 18. Operational Information Active
May 10 2019 08:47:29 CST The Daily RSASM for Friday May 10, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 10 2019 04:21:26 CST ERCOT is working from the Primary Control Center until further notice, use the OPX number for Taylor. Operational Information Active
May 10 2019 04:20:35 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
May 10 2019 00:01:02 CST No sudden loss of generation greater than 450 MW occurred on May 9, 2019. Operational Information Active
May 09 2019 16:23:29 CST ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
May 09 2019 15:39:04 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of May 09, 2019 is available. Operational Instruction Active
May 09 2019 08:48:06 CST The Daily RSASM for Thursday May 9, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 09 2019 00:27:19 CST No sudden loss of generation greater than 450 MW occurred on May 8, 2019. Operational Information Active
May 08 2019 08:47:12 CST The Daily RSASM for Wednesday, May 8, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 08 2019 00:17:01 CST No sudden loss of generation greater than 450 MW occurred on May 7, 2019. Operational Information Active
May 07 2019 14:14:01 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
May 07 2019 12:20:17 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
May 07 2019 08:50:16 CST The Daily RSASM for Tuesday, May 7, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 07 2019 00:14:09 CST No sudden loss of generation greater than 450 MW occurred on May 6, 2019. Operational Information Active
May 06 2019 13:21:48 CST ERCOT has cancelled the following notice: The Eagle Pass 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
May 06 2019 13:21:34 CST ERCOT has cancelled the following notice: The The Eagle Pass DC Tie will be unavailable from 06:30 05/06/2019 through 13:00 05/06/2019 due to a forced outage. DC Tie will be unavailable from 06:30 05/06/2019 through 13:00 05/06/2019 due to a planned outage. Operational Information Cancelled
May 06 2019 10:49:42 CST DC Tie Outage: The Railroad DC Tie will be unavailable from 08:00 05/10/2019 through 17:00 05/11/2019 due to a planned outage. Operational Information Active
May 06 2019 08:47:34 CST The Daily RSASM for Monday, May 6, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 06 2019 06:42:23 CST ERCOT has cancelled the following notice: The Eagle Pass DC Tie will be unavailable from 02:43 05/06/2019 through 10:00 05/06/2019 due to a forced outage. Operational Information Cancelled
May 06 2019 06:41:40 CST DC Tie Outage: The The Eagle Pass DC Tie will be unavailable from 06:30 05/06/2019 through 13:00 05/06/2019 due to a forced outage. DC Tie will be unavailable from 06:30 05/06/2019 through 13:00 05/06/2019 due to a planned outage. Operational Information Active
May 06 2019 03:06:46 CST DC Tie Curtailment Notice: The Eagle Pass 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
May 06 2019 02:59:10 CST DC Tie Outage: The Eagle Pass DC Tie will be unavailable from 02:43 05/06/2019 through 10:00 05/06/2019 due to a forced outage. Operational Information Active
May 06 2019 02:21:34 CST No sudden loss of generation greater than 450 MW occurred on May 5, 2019. Operational Information Active
May 05 2019 18:31:43 CST ERCOT has cancelled the following notice: ERCOT is issuing a Watch due to DRUC not completing by 1800 due to delay of the Day Ahead Market. Watch Cancelled
May 05 2019 18:31:39 CST ERCOT has cancelled the following notice: At 16:52 ERCOT cancelled the Advisory for the Day Ahead Market timeline deviation. Advisory Cancelled
May 05 2019 17:36:16 CST At 16:52 ERCOT cancelled the Advisory for the Day Ahead Market timeline deviation. Advisory Active
May 05 2019 17:04:58 CST ERCOT is issuing a Watch due to DRUC not completing by 1800 due to delay of the Day Ahead Market. Watch Active
May 05 2019 13:25:38 CST ERCOT has postponed the deadline for the posting of the DAM solution for Operating Day May 6th, 2019 due to an internal issue, which is under investigation. Advisory Active
May 05 2019 08:46:26 CST The Daily RSASM for Sunday, May 5, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 05 2019 00:05:19 CST No sudden loss of generation greater than 450 MW occurred on May 4, 2019. Operational Information Active
May 04 2019 08:46:41 CST The Daily RSASM for Saturday, May 4, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 04 2019 03:15:56 CST No sudden loss of generation greater than 450 MW occurred on May 3, 2019. Operational Information Active
May 03 2019 14:29:31 CST DC Tie Outage: The Railroad DC Tie will be unavailable from 08:00 05/10/2019 through 17:00 05/11/2019 due to a planned outage. Operational Information Active
May 03 2019 08:46:27 CST The Daily RSASM for Friday, May 3, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 03 2019 04:11:00 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 19:50 for operating day Wednesday, 5/01/2019 for 15 MW REGUP for HE 22, 23 and 24. Operational Information Cancelled
May 03 2019 00:10:55 CST No sudden loss of generation greater than 450 MW occurred on May 2, 2019. Operational Information Active
May 02 2019 15:45:05 CST No sudden loss of generation greater than 450 MW occurred on May 1, 2019. Operational Information Active
May 02 2019 09:26:51 CST ERCOT has cancelled the following notice: ERCOT is taking manual action due to planned outages in the Fort Stockton area. Action taken to mitigate unsolved contingency SPIGSOL Operational Information Cancelled
May 02 2019 09:22:06 CST ERCOT has cancelled the following notice: ERCOT is taking manual action due to planned outages in the Fort Stockton area. Action taken to mitigate unsolved contingency SPIGSOL Operational Information Cancelled
May 02 2019 09:17:57 CST An OCN has been issued due to ERCOT modifying a Generic Transmission Constraint due to dynamic voltage stability issues that become more limiting than steady state voltage issues, under Transmission Outage conditions for the Panhandle Generic Transmission Constraint (GTC). Operational Information Active
May 02 2019 09:12:36 CST ERCOT is taking manual action due to planned outages in the Fort Stockton area. Action taken to mitigate unsolved contingency SPIGSOL Operational Information Active
May 02 2019 08:46:50 CST The Daily RSASM for Thursday, May 2, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
May 02 2019 05:18:43 CST No sudden loss of generation greater than 450 MW occurred on May 2, 2019. Operational Information Active
May 01 2019 19:29:04 CST ERCOT will execute a SASM at 19:50 for operating day Wednesday, 5/01/2019 for 15 MW REGUP for HE 22, 23 and 24. Operational Information Active
May 01 2019 10:20:19 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 01 2019 10:17:51 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 01 2019 08:51:44 CST The Daily RSASM for Wednesday May 01, 2019 did not occur due to zero participating QSEs Operational Information Active
May 01 2019 00:06:23 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
May 01 2019 00:04:53 CST On April 30, 2019, a sudden loss of generation occurred at 09:37 totaling 575 MW. Frequency declined to 59.866 Hz, ERCOT load was 42, 280 MW. Another sudden loss of generation occurred at 21:11 totaling 602 MW. Frequency declined to 59.870 Hz, ERCOT load was 48, 561 MW. Operational Information Active
May 01 2019 00:02:23 CST ERCOT Emergency Base Points are Enabled Operational Information Active