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Public Notices

This section contains public market notifications required by protocols as well as other market messages ERCOT may post for market transparency. ERCOT began archiving public notices November 3, 2011.

Dec 2023 Jan 2024 Feb 2024 Mar 2024 Apr 2024 May 2024
Date & Time Notice Type Status
May 9, 2024 4:00:38 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 03:45 for operating day 05/09/24 for HE06-09 for 19.1 MW RRS Operational Information Cancelled
May 9, 2024 3:24:47 AM ERCOT has cancelled the following notice: The DC_L (Laredo) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to an actual or anticipated emergency in the CENACE (Mexico) control area. DC Tie Curtailment Notice Cancelled
May 9, 2024 3:24:27 AM ERCOT has cancelled the following notice: The DC_R (Railroad) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to an actual or anticipated emergency in the CENACE (Mexico) control area. DC Tie Curtailment Notice Cancelled
May 9, 2024 3:14:50 AM ERCOT will execute a SASM at 03:45 for operating day 05/09/24 for HE06-09 for 19.1 MW RRS Operational Information Active
May 9, 2024 12:07:47 AM No sudden loss of generation greater than 450 MW occurred on May 08, 2024. Operational Information Active
May 8, 2024 10:03:08 PM ERCOT has cancelled the following notice: At 12:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday May 7, 2024, HE 1700 through Wednesday May 8, 2024, HE 2200. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek up to 6,060 MW from an OAE and then make the OSA. On Friday May 3, 2024, at 12:00. ERCOT will execute an OAE if deemed necessary. Please notify ERCOT by email aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Cancelled
May 8, 2024 10:00:08 PM ERCOT has cancelled the following notice: OCN issued for the predicted extreme hot weather event for the ERCOT Region Wednesday, May 08, 2024. Operational Information Cancelled
May 8, 2024 9:00:38 PM At 21:00, All Non-Spin has been recalled. Operational Information Active
May 8, 2024 9:00:16 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2024-05-08 21:00:16, END_TIME: 2024-05-08 21:00:16, DURATION: 0 Hrs 0 Mins.; Operational Information
May 8, 2024 9:00:06 PM ERCOT has cancelled the following notice: ERCOT issued a Watch for a projected reserve capacity shortage with no market solution available for HE 20 – 21, which causes a risk for an EEA event. Watch Cancelled
May 8, 2024 8:48:16 PM ERCOT ECRS HAS BEEN RECALLED Operational Information Cancelled
May 8, 2024 8:33:01 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 360.7, BEGIN_TIME: 2024-05-08 21:00:00, END_TIME: 2024-05-08 23:59:59, DURATION: 2 Hrs 59 Mins.; Operational Information
May 8, 2024 7:33:01 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 415.9, BEGIN_TIME: 2024-05-08 20:00:00, END_TIME: 2024-05-08 23:59:59, DURATION: 3 Hrs 59 Mins.; Operational Information
May 8, 2024 7:11:14 PM The DC_L (Laredo) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to an actual or anticipated emergency in the CENACE (Mexico) control area. DC Tie Curtailment Notice Active
May 8, 2024 7:10:22 PM The DC_R (Railroad) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to an actual or anticipated emergency in the CENACE (Mexico) control area. DC Tie Curtailment Notice Active
May 8, 2024 7:07:04 PM ERCOT ECRS HAS BEEN DEPLOYED Operational Information Active
May 8, 2024 6:49:32 PM At 18:48 approximately 498 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
May 8, 2024 6:48:41 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 498.3, BEGIN_TIME: 2024-05-08 18:48:41, END_TIME: 2024-05-08 23:59:59, DURATION: 5 Hrs 11 Mins.; Operational Information
May 8, 2024 9:30:02 AM ERCOT issued a Watch for a projected reserve capacity shortage with no market solution available for HE 20 – 21, which causes a risk for an EEA event. Watch Active
May 8, 2024 8:47:18 AM The Daily RSASM for 05/08/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 8, 2024 7:57:47 AM The DC_R (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
May 8, 2024 5:18:34 AM ERCOT has been notified that the RAILROAD DC Tie has been derated to 150 MW Import/Export due to station 1 trip until 5/29/24@1300. Operational Information Active
May 8, 2024 12:07:14 AM No sudden loss of generation greater than 450 MW occurred on May 07, 2024. Operational Information Active
May 8, 2024 12:04:22 AM Due to the DC_R (Railroad) Tie Station 1 trip at 21:58 on 05/07/24, the DC_R (Railroad) Tie remains derated to 150 MW Import/Export until further notice. Operational Information Active
May 7, 2024 10:07:15 PM The DC_R (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
May 7, 2024 3:30:20 PM ERCOT has cancelled the following notice: The DC_N (North) 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 7, 2024 12:58:51 PM The DC_N (North) 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 7, 2024 10:45:01 AM OCN issued for the predicted extreme hot weather event for the ERCOT Region Wednesday, May 08, 2024. Operational Information Active
May 7, 2024 8:47:49 AM The Daily RSASM for 05/07/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 7, 2024 12:21:15 AM No sudden loss of generation greater than 450 MW occurred on May 06, 2024. Operational Information Active
May 6, 2024 8:46:49 AM The Daily RSASM for 05/06/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 6, 2024 12:54:40 AM No sudden loss of generation greater than 450 MW occurred on May 05, 2024. Operational Information Active
May 5, 2024 5:51:58 PM ERCOT has cancelled the following notice: The Eskota RAS has been taken out of service and removed from RTCA. Operational Information Cancelled
May 5, 2024 10:58:50 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [1045] for operating day 05/05/2024 for HE [13 through 24] for 7 MW of RRS Operational Information Cancelled
May 5, 2024 10:12:21 AM ERCOT will execute a SASM at [1045] for operating day 05/05/2024 for HE [13 through 24] for 7 MW of RRS Operational Information Active
May 5, 2024 8:46:33 AM The Daily RSASM for 05/05/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 5, 2024 12:17:17 AM No sudden loss of generation greater than 450 MW occurred on May 04, 2024. Operational Information Active
May 4, 2024 3:51:03 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [1535] for operating day 05/04/2024 for HE [18 through 21] for 1.1MW of ECRS. Operational Information Cancelled
May 4, 2024 3:04:43 PM ERCOT will execute a SASM at [1535] for operating day 05/04/2024 for HE [18 through 21] for 1.1MW of ECRS. Operational Information Active
May 4, 2024 9:52:55 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [0935] for operating day 05/04/2024 for HE [12 through 14] for 1.9MW of ECRS Operational Information Cancelled
May 4, 2024 9:08:24 AM ERCOT will execute a SASM at [0935] for operating day 05/04/2024 for HE [12 through 14] for 1.9MW of ECRS Operational Information Active
May 4, 2024 9:07:59 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [1035] for operating day 05/04/2024 for HE [12 through 14] for 1.9MW of ECRS Operational Information Cancelled
May 4, 2024 9:06:45 AM ERCOT will execute a SASM at [1035] for operating day 05/04/2024 for HE [12 through 14] for 1.9MW of ECRS Operational Information Active
May 4, 2024 9:05:09 AM The Daily RSASM for 05/04/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 4, 2024 8:50:38 AM The Daily RSASM for 05/04/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 4, 2024 12:13:19 AM No sudden loss of generation greater than 450 MW occurred on May 03, 2024. Operational Information Active
May 4, 2024 12:10:28 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [23:40] for operating day [5/4/24] this is for ECRS for [HE 3 – 1.1 MWs, HE 5 – 1.2 MWs, HE 8 – 1.4 MWs, HE 9 – 1.9 MWs, HE 10 & 11 - 1.6 MWs each hour, HE 12 & 13 – 1.4 MWs each hour, HE 14-16 – 1.6 MWs each hour, HE 17 & 18 – 1.9 MWs each hour, HE 19 – 1.5 MWs, HE 20 – 1.2 MWs, HE 21 & 22 – 1.3 MWs each hour]; Non-spin for [HE 2 – 2.2 MWs, HE 3-6 – 2.9 MWs each hour, HE 7 & 8 – 3.5 MWs each hour, HE 9 – 3.3 MWs, HE 10 – 3.2 MWs, HE 11 – 3 MWs, HE 12-14 – 2.9 MWs each hour, HE 15-18 – 2 MWs each hour, HE 19-22 – 2.3 MWs each hour, HE 23 – 2.1 MWs, HE 24 – 2.2 MWs]; RRS for [HE 2 – 2.2 MWs, HE 3 – 2.3 MWs, HE 4-6 – 2.4 MWs for each hour, HE 7 & 8 – 2.1 MWs each hour, HE 9 – 2 MWs, HE 10 – 1.9 MWs, HE 11 & 12 – 1.7 MWs each hour, HE 13-15 – 1.6 MWs each hour, HE 16 & 17 – 1.5 MWs each hour, HE 18-22 – 1.6 MWs each hour, HE 23 – 1.9 MWs, and HE 24 – 2 MWs]. Operational Information Cancelled
May 3, 2024 11:11:41 PM ERCOT will execute a SASM at [23:40] for operating day [5/4/24] this is for ECRS for [HE 3 – 1.1 MWs, HE 5 – 1.2 MWs, HE 8 – 1.4 MWs, HE 9 – 1.9 MWs, HE 10 & 11 - 1.6 MWs each hour, HE 12 & 13 – 1.4 MWs each hour, HE 14-16 – 1.6 MWs each hour, HE 17 & 18 – 1.9 MWs each hour, HE 19 – 1.5 MWs, HE 20 – 1.2 MWs, HE 21 & 22 – 1.3 MWs each hour]; Non-spin for [HE 2 – 2.2 MWs, HE 3-6 – 2.9 MWs each hour, HE 7 & 8 – 3.5 MWs each hour, HE 9 – 3.3 MWs, HE 10 – 3.2 MWs, HE 11 – 3 MWs, HE 12-14 – 2.9 MWs each hour, HE 15-18 – 2 MWs each hour, HE 19-22 – 2.3 MWs each hour, HE 23 – 2.1 MWs, HE 24 – 2.2 MWs]; RRS for [HE 2 – 2.2 MWs, HE 3 – 2.3 MWs, HE 4-6 – 2.4 MWs for each hour, HE 7 & 8 – 2.1 MWs each hour, HE 9 – 2 MWs, HE 10 – 1.9 MWs, HE 11 & 12 – 1.7 MWs each hour, HE 13-15 – 1.6 MWs each hour, HE 16 & 17 – 1.5 MWs each hour, HE 18-22 – 1.6 MWs each hour, HE 23 – 1.9 MWs, and HE 24 – 2 MWs]. Operational Information Active
May 3, 2024 12:00:01 PM ERCOT has executed the OSA process due to a possible future Emergency Condition of reserve capacity deficiency projected for OSA Period Tuesday May 7, 2024, HE 1700 through Wednesday May 8, 2024, HE 2200. Outages not moved voluntarily prior to Friday May 3, 2024, at 12:00 will be considered an OSA.. OCN Active
May 3, 2024 11:48:57 AM ERCOT has cancelled the following notice: The DC_R (Railroad) DC Tie will be unavailable from 04/15/2024 07:45 through 05/03/2024 15:00 due to a planned outage. Operational Information Cancelled
May 3, 2024 8:46:34 AM The Daily RSASM for 05/03/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 3, 2024 2:15:06 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:45 for operating day 05/03/2024 for 8 MW ECRS HE 7-22 and 8.6 MW RRS HE 4-6 and HE 23-24. Operational Information Cancelled
May 3, 2024 1:09:06 AM ERCOT will execute a SASM at 01:45 for operating day 05/03/2024 for 8 MW ECRS HE 7-22 and 8.6 MW RRS HE 4-6 and HE 23-24. Operational Information Active
May 3, 2024 12:02:36 AM No sudden loss of generation greater than 450 MW occurred on May 02, 2024. Operational Information Active
May 2, 2024 10:00:01 PM ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater until 05/03/2024 0300 UTC. Operational Information Cancelled
May 2, 2024 4:12:58 PM The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater until 05/03/2024 0300 UTC. Operational Information Active
May 2, 2024 4:00:01 PM ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater until 05/02/2024 2100 UTC. Operational Information Cancelled
May 2, 2024 12:11:55 PM The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater until 05/02/2024 2100 UTC. Operational Information Active
May 2, 2024 12:00:13 PM At 12:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday May 7, 2024, HE 1700 through Wednesday May 8, 2024, HE 2200. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek up to 6,060 MW from an OAE and then make the OSA. On Friday May 3, 2024, at 12:00. ERCOT will execute an OAE if deemed necessary. Please notify ERCOT by email aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Active
May 2, 2024 9:17:06 AM The Eskota RAS has been taken out of service and removed from RTCA. Operational Information Active
May 2, 2024 8:46:29 AM The Daily RSASM for 05/02/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 2, 2024 12:00:15 AM No sudden loss of generation greater than 450 MW occurred on May 01, 2024. Operational Information Active
May 1, 2024 9:00:02 PM ERCOT has cancelled the following notice: At 14:30, ERCOT has updated the AAN for a possible future Emergency Condition of reserve capacity deficiency beginning Monday April 29, 2024 at HE 20:00 through Wednesday May 1, 2024 at HE 21:00 based on changed conditions. At this time, ERCOT does not seek additional capacity and will not be issuing an OSA. ERCOT has posted an updated AAN Planning Assessment for reference. OCN Cancelled
May 1, 2024 1:27:25 PM ERCOT has identified the following MIS posting as delayed for Operating Day 05/02/2024: DAM Shift Factors. The report will be published after 13:30. Operational Information Active
May 1, 2024 8:49:42 AM The Daily RSASM for 05/01/2024 will not be occurring due to zero participating QSEs. Operational Information Active
May 1, 2024 2:10:12 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:50 for operating day 05/01/2024 for 9 MW RRS HE 11, 10 MW RRS HE 12, 12 MW RRS HE 13, 7 MW RRS HE 14, 10 MW RRS HE 15, 9 MW RRS HE 16, and 3 MW RRS HE 23-24. Operational Information Cancelled
May 1, 2024 1:14:25 AM ERCOT will execute a SASM at 01:50 for operating day 05/01/2024 for 9 MW RRS HE 11, 10 MW RRS HE 12, 12 MW RRS HE 13, 7 MW RRS HE 14, 10 MW RRS HE 15, 9 MW RRS HE 16, and 3 MW RRS HE 23-24. Operational Information Active
May 1, 2024 12:03:22 AM No sudden loss of generation greater than 450 MW occurred on April 30, 2024. Operational Information Active