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.

Sep 2019 Oct 2019 Nov 2019 Dec 2019 Jan 2020 Feb 2020
Date Message Type Status
Feb 23 2020 08:46:19 CST The Daily RSASM for Sunday, February 23, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 23 2020 00:07:20 CST No sudden loss of generation greater than 450 MW occurred on February 22, 2020 Operational Information Active
Feb 22 2020 08:46:37 CST The Daily RSASM for Saturday, February 22, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 22 2020 01:09:52 CST No sudden loss of generation greater than 450 MW occurred on February 21, 2020 Operational Information Active
Feb 21 2020 08:46:15 CST The Daily RSASM for Friday, February 21, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 21 2020 00:01:07 CST No sudden loss of generation greater than 450 MW occurred on February 20, 2020. Operational Information Active
Feb 20 2020 13:38:08 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for Bluff Creek 345KV North bus outage. Operational Information Cancelled
Feb 20 2020 12:29:02 CST ERCOT is taking manual actions to pre-posture for Bluff Creek 345KV North bus outage. Operational Information Active
Feb 20 2020 08:51:56 CST The Daily RSASM for Thursday, February 20, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 20 2020 00:00:13 CST No sudden loss of generation greater than 450 MW occurred on February 19, 2020. Operational Information Active
Feb 19 2020 08:47:14 CST The Daily RSASM for Wednesday February 19, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 19 2020 08:25:53 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for 345kv line MOSSW to ODEHV 34600_A outage. Operational Information Cancelled
Feb 19 2020 07:31:43 CST ERCOT is taking manual actions to pre-posture for 345kv line MOSSW to ODEHV 34600_A outage. Operational Information Active
Feb 19 2020 04:45:03 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
Feb 19 2020 03:32:36 CST ERCOT will execute a SASM at 04:05 for operating day Wednesday, February 19, 2020 for 20 MW RRS and 40MW NSPIN for each hour HE09 through HE24 and 5mw REGUP for HE19. Operational Information Active
Feb 19 2020 00:28:38 CST ERCOT will execute a SASM at 01:15 for operating day Wednesday, February 19, 2020 for 20 MW RRS and 55MW NSPIN for each hour HE04 through HE08 and 5mw REGUP for HE07. Operational Information Active
Feb 19 2020 00:00:52 CST No sudden loss of generation greater than 450 MW occurred on February 18, 2020. Operational Information Active
Feb 18 2020 15:52:36 CST Eagle Pass DC Tie and DC-EGPS (DC_EGPS) 138 kV Block Load Transfer (138 kV CB 3000)will be unavailable on Monday 02/24/20 at 08:30 until Wednesday16:00 for CFE clearance on the Piedras Negras to Eagle Pass circuit. Operational Information Active
Feb 18 2020 08:50:12 CST The Daily RSASM for Tuesday February 18, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 18 2020 00:00:06 CST No sudden loss of generation greater than 450 MW occurred on February 17, 2020. Operational Information Active
Feb 17 2020 08:54:36 CST The Daily RSASM will not be occurring due to zero participating QSEs. Operational Information Active
Feb 17 2020 00:11:15 CST No sudden loss of generation greater than 450 MW occurred on February 16, 2020. Operational Information Active
Feb 16 2020 08:53:04 CST The Daily RSASM for Sunday, February 16, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 16 2020 00:18:02 CST No sudden loss of generation greater than 450 MW occurred on February 15, 2020. Operational Information Active
Feb 15 2020 08:48:21 CST The Daily RSASM for Saturday, February 15, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 15 2020 00:39:07 CST No sudden loss of generation greater than 450 MW occurred on February 14, 2020. Operational Information Active
Feb 14 2020 08:47:07 CST The Daily RSASM for Friday, February 14, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 14 2020 00:04:17 CST No sudden loss of generation greater than 450 MW occurred on February 13, 2020. Operational Information Active
Feb 13 2020 08:47:32 CST The Daily RSASM for Thursday, February 13, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 13 2020 00:13:08 CST No sudden loss of generation greater than 450 MW occurred on February 12, 2020. Operational Information Active
Feb 12 2020 16:51:37 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:35 for operating day 02/12/2020 for HE07 for 42 MW RRS and HE08 14 MW RRS. Operational Information Cancelled
Feb 12 2020 08:47:41 CST The Daily RSASM for Wednesday, February 12, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 12 2020 01:10:41 CST ERCOT will execute a SASM at 01:35 for operating day 02/12/2020 for HE07 for 42 MW RRS and HE08 14 MW RRS. Operational Information Active
Feb 12 2020 00:55:00 CST No sudden loss of generation greater than 450 MW occurred on February 11, 2020. Operational Information Active
Feb 11 2020 12:33:47 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Feb 10, 2020 is available. Operational Instruction Active
Feb 11 2020 08:46:02 CST The Daily RSASM for Tuesday, February 11, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 11 2020 03:35:51 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:05 for operating day 02/11/2020 for HE 0700, 0800, 0900, 1000 for RRS MW 35, 7, 21, 7 Operational Information Cancelled
Feb 11 2020 01:39:16 CST ERCOT will execute a SASM at 02:05 for operating day 02/11/2020 for HE 0700, 0800, 0900, 1000 for RRS MW 35, 7, 21, 7 Operational Information Active
Feb 11 2020 00:31:16 CST On 02/10/2020, a sudden loss of generation occurred at 16:07 totaling 511 MW. Frequency declined to 59.860 Hz, ERCOT load was 43, 925 MW. Operational Information Active
Feb 10 2020 16:13:39 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Feb 10 2020 16:07:07 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Feb 10 2020 08:46:14 CST The Daily RSASM for Monday, February 10, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 10 2020 00:13:28 CST No sudden loss of generation greater than 450 MW occurred on February 9, 2020. Operational Information Active
Feb 09 2020 08:45:57 CST The Daily RSASM for Sunday, February 9, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 09 2020 00:00:06 CST No sudden loss of generation greater than 450 MW occurred on February 8, 2020. Operational Information Active
Feb 08 2020 08:48:33 CST The Daily RSASM for Saturday February 8, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 08 2020 00:20:33 CST No sudden loss of generation greater than 450 MW occurred on February 7, 2020. Operational Information Active
Feb 07 2020 08:47:06 CST The Daily RSASM for Friday February 7, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 07 2020 04:31:11 CST ERCOT is working from primary control center. Operational Information Active
Feb 07 2020 04:30:08 CST ERCOT has cancelled the following notice: ERCOT will operating from back up control center until further notice. Operational Information Cancelled
Feb 07 2020 04:30:04 CST ERCOT has cancelled the following notice: ERCOT will operating from back up control center until further notice. Operational Information Cancelled
Feb 07 2020 00:06:36 CST On 02/6/2020, a sudden loss of generation occurred at 01:16 totaling 595 MW. Frequency declined to 59.904 Hz, ERCOT load was 45, 100 MW. Another sudden loss of generation occurred at 21:23 totaling 624 MW. Frequency declined to 59.863 Hz, ERCOT load was 47, 972 MW. Operational Information Active
Feb 06 2020 21:29:31 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Feb 06 2020 21:22:59 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Feb 06 2020 17:24:29 CST ERCOT will operating from back up control center until further notice. Operational Information Active
Feb 06 2020 14:04:36 CST Notification of Prices Under Investigation: Notification of DAM prices under investigation. Update: ERCOT has completed its investigation of DAM prices for Operating Day 02/06/2020, and has concluded that no corrections are warranted. Prices will become final at 10 AM on 02/10/2020. Alert Active
Feb 06 2020 08:48:07 CST The Daily RSASM for Thursday February 6, 2020 will not be occurring due to zero participating QSEs. Operational Information Active
Feb 06 2020 08:24:13 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 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
Feb 06 2020 07:03:45 CST DC Tie Curtailment Notice: The Eagle Pass 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
Feb 06 2020 01:20:16 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Feb 06 2020 01:16:24 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Feb 06 2020 00:19:12 CST No sudden loss of generation greater than 450 MW occurred on February 5, 2020. Operational Information Active
Feb 05 2020 15:50:21 CST Notification of Prices Under Investigation: Notification of DAM prices under investigation. ERCOT has identified a potentially incorrect Resource RRS limit used for DAM for Operating Day 02/06/2020. ERCOT is evaluating the facts, and the impact on prices, if any, is still under investigation. ERCOT will send an update as soon as the investigation is complete. If a price correction is needed, corrected prices will be posted no later than 10 AM on 02/10/2020. Alert Active
Feb 05 2020 08:51:27 CST The Daily RSASM for Wednesday February 5, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 05 2020 02:46:46 CST ERCOT will execute a SASM at 03:15 for operating day Wednesday, 02/05/2020 for 56 MW RRS for HE06. Operational Information Active
Feb 05 2020 01:14:09 CST No sudden loss of generation greater than 450 MW occurred on February 4, 2020. Operational Information Active
Feb 05 2020 01:03:18 CST No sudden loss of generation greater than 450 MW occurred on February 4, 2020. Operational Information Active
Feb 04 2020 15:31:33 CST DAM is complete, DRUC will begin at 16:22 Operational Information Active
Feb 04 2020 13:25:15 CST ERCOT has postponed the deadline for the posting of the DAM Solution for Operating Day February 5, 2020 due to long solution time. Advisory Active
Feb 04 2020 09:01:13 CST ERCOT has cancelled the following notice: At 0705 ERCOT is issuing a Transmission Emergency for the far West Area to commit EMR PBSES generation Operational Information Cancelled
Feb 04 2020 08:48:13 CST The Daily RSASM for Tuesday February 4, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 04 2020 07:12:37 CST At 0705 ERCOT is issuing a Transmission Emergency for the far West Area to commit EMR PBSES generation Operational Information Active
Feb 04 2020 02:40:59 CST No sudden loss of generation greater than 450 MW occurred on February 3, 2020. Operational Information Active
Feb 04 2020 02:40:20 CST No sudden loss of generation greater than 450 MW occurred on February 4, 2020. Operational Information Active
Feb 03 2020 15:00:03 CST ERCOT has cancelled the following notice: The Notification to be executed at 11:40 SASAM was cancelled Operational Information Cancelled
Feb 03 2020 13:58:46 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2020-02-03 13:58:45, END_TIME: 2020-02-03 13:58:45, DURATION: 0 Hrs 0 Mins.; Market Message
Feb 03 2020 13:35:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 14:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 9 Hrs 0 Mins.; Market Message
Feb 03 2020 13:30:20 CST The Notification to be executed at 11:40 SASAM was cancelled Operational Information Active
Feb 03 2020 12:45:28 CST ERCOT has cancelled the following notice: ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW Operational Information Cancelled
Feb 03 2020 12:44:01 CST ERCOT has cancelled the following notice: ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW Operational Information Cancelled
Feb 03 2020 12:35:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 13:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 10 Hrs 0 Mins.; Market Message
Feb 03 2020 11:35:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 12:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 11 Hrs 0 Mins.; Market Message
Feb 03 2020 11:15:26 CST ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW Operational Information Active
Feb 03 2020 11:00:48 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:40 for operating day 02/03/2020 for HE 6-12. REGUP HE 06-11 8.8 MWs, REGUP HE 12 7.1 MWs and REGDN HE 10 3.3 MWs. Operational Information Cancelled
Feb 03 2020 10:35:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 11:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 12 Hrs 0 Mins.; Market Message
Feb 03 2020 09:35:01 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 09:32:58, END_TIME: 2020-02-03 23:00:00, DURATION: 13 Hrs 27 Mins.; Market Message
Feb 03 2020 09:32:58 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 09:32:58, END_TIME: 2020-02-03 23:00:00, DURATION: 13 Hrs 27 Mins.; Market Message
Feb 03 2020 09:00:01 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2020-02-03 09:00:01, END_TIME: 2020-02-03 09:00:01, DURATION: 0 Hrs 0 Mins. ; Market Message
Feb 03 2020 08:55:59 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 08:55:59, END_TIME: 2020-02-03 09:00:00, DURATION: 0 Hrs 4 Mins.; Market Message
Feb 03 2020 08:48:19 CST The Daily RSASM for Monday February 3, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 03 2020 02:09:17 CST ERCOT will execute a SASM at 02:40 for operating day 02/03/2020 for HE 6-12. REGUP HE 06-11 8.8 MWs, REGUP HE 12 7.1 MWs and REGDN HE 10 3.3 MWs. Operational Information Active
Feb 03 2020 00:18:45 CST No sudden loss of generation greater than 450 MW occurred on February 2, 2020. Operational Information Active
Feb 02 2020 08:45:58 CST The Daily RSASM for Sunday February 2, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 02 2020 00:52:18 CST No sudden loss of generation greater than 450 MW occurred on February 1, 2020. Operational Information Active
Feb 01 2020 08:46:40 CST The Daily RSASM for Saturday February 1, 2020 will not be occurring due to zero participating QSEs Operational Information Active
Feb 01 2020 00:03:05 CST No sudden loss of generation greater than 450 MW occurred on January 31, 2020. Operational Information Active