Market Information System Grid and Market Conditions

Operations Messages

This section contains important messages from the ERCOT Control Room. Refresh this screen to see current operation messages. (Subscribe to Operations Messages Feed RSS feed.)

Apr 2021 May 2021 Jun 2021 Jul 2021 Aug 2021 Sep 2021
Date Message Type Status
Aug 31 2021 08:46:20 CST The Daily RSASM for Tuesday, August 31, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Aug 31 2021 00:03:36 CST No sudden loss of generation greater than 450 MW occurred on August 30, 2021. Operational Information Active
Aug 30 2021 08:46:38 CST The Daily RSASM for Monday, August 30, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Aug 30 2021 08:20:16 CST Cancelled RUC commitment at timestamp 08/30/21 0800 for TY_COOKE GT2 for 08/30/21 1400 - 2100 due to unintended commitment. Operational Information Active
Aug 30 2021 00:00:43 CST No sudden loss of generation greater than 450 MW occurred on August 29, 2021. Operational Information Active
Aug 29 2021 08:49:12 CST The Daily RSASM for Sunday, August 29, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 29 2021 00:02:17 CST On August 28, 2021, a sudden loss of generation occurred at 07:07 totaling 781 MW. Frequency declined to 59.894 Hz, ERCOT load was 42, 210 MW. Operational Information Active
Aug 28 2021 08:51:42 CST The Daily RSASM for Saturday, August 28, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 28 2021 00:08:33 CST No sudden loss of generation greater than 450 MW occurred on August 27, 2021. Operational Information Active
Aug 27 2021 08:48:35 CST The Daily RSASM for Friday, August 27, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 27 2021 00:23:02 CST No sudden loss of generation greater than 450 MW occurred on August 26, 2021. Operational Information Active
Aug 26 2021 08:48:05 CST The Daily RSASM for Thursday, August 26, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 26 2021 00:05:59 CST No sudden loss of generation greater than 450 MW occurred on August 25, 2021. Operational Information Active
Aug 25 2021 00:11:22 CST No sudden loss of generation greater than 450 MW occurred on August 24, 2021. Operational Information Active
Aug 24 2021 08:49:53 CST The Daily RSASM for Tuesday, August 24, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 24 2021 00:27:19 CST No sudden loss of generation greater than 450 MW occurred on August 23, 2021. Operational Information Active
Aug 24 2021 00:26:10 CST No sudden loss of generation greater than 450 MW occurred on August 22, 2021. Operational Information Active
Aug 23 2021 08:54:16 CST The Daily RSASM for Monday, August 23, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 23 2021 00:11:06 CST No sudden loss of generation greater than 450 MW occurred on August 22, 2021. Operational Information Active
Aug 22 2021 08:46:39 CST The Daily RSASM for Sunday, August 22, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 22 2021 00:02:04 CST No sudden loss of generation greater than 450 MW occurred on August 21, 2021. Operational Information Active
Aug 21 2021 08:46:17 CST The Daily RSASM for Saturday, August 21, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 21 2021 00:01:41 CST No sudden loss of generation greater than 450 MW occurred on August 20, 2021. Operational Information Active
Aug 20 2021 08:46:57 CST The Daily RSASM for Friday, August 20, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 20 2021 00:01:30 CST No sudden loss of generation greater than 450 MW occurred on August 19, 2021. Operational Information Active
Aug 19 2021 08:48:44 CST The Daily RSASM for Thursday, August 19, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 19 2021 00:06:56 CST No sudden loss of generation greater than 450 MW occurred on August 18, 2021. Operational Information Active
Aug 18 2021 16:07:04 CST No sudden loss of generation greater than 450 MW occurred on August 17, 2021. Operational Information Active
Aug 18 2021 08:47:11 CST The Daily RSASM for Wednesday, August 18, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 17 2021 08:48:49 CST The Daily RSASM for Tuesday, August 17, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 17 2021 00:05:36 CST No sudden loss of generation greater than 450 MW occurred on August 16, 2021. Operational Information Active
Aug 16 2021 18:44:18 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 18:00 through 08/16/2021 17:00 due to a forced outage. Operational Information Cancelled
Aug 16 2021 13:44:29 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Aug 16 2021 13:37:13 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Aug 16 2021 08:46:43 CST The Daily RSASM for Monday, August 16, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 16 2021 00:05:06 CST No sudden loss of generation greater than 450 MW occurred on August 15, 2021 Operational Information Active
Aug 15 2021 08:47:25 CST The Daily RSASM for Sunday, August 15, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 15 2021 00:04:18 CST No sudden loss of generation greater than 450 MW occurred on August 14, 2021 Operational Information Active
Aug 14 2021 18:31:34 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 13:20 through 08/14/2021 18:00 due to a forced outage. Operational Information Cancelled
Aug 14 2021 17:13:43 CST DC Tie Outage: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 18:00 through 08/16/2021 17:00 due to a forced outage. Operational Information Active
Aug 14 2021 16:27:42 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 13:20 through 08/14/2021 13:59 due to a forced outage. Operational Information Cancelled
Aug 14 2021 16:27:25 CST DC Tie Outage: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 13:20 through 08/14/2021 18:00 due to a forced outage. Operational Information Active
Aug 14 2021 14:03:53 CST DC Tie Outage: The DC_L (Laredo VFT) DC Tie will be unavailable from 08/14/2021 13:20 through 08/14/2021 13:59 due to a forced outage. Operational Information Active
Aug 14 2021 08:47:44 CST The Daily RSASM for Saturday, August 14, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 14 2021 00:07:22 CST No sudden loss of generation greater than 450 MW occurred on August 13, 2021 Operational Information Active
Aug 13 2021 08:47:33 CST The Daily RSASM for Friday, August 13, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 13 2021 04:06:28 CST ERCOT working from Primary CC: ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Aug 13 2021 04:05:48 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
Aug 13 2021 00:40:02 CST No sudden loss of generation greater than 450 MW occurred on August 12, 2021 Operational Information Active
Aug 12 2021 15:59:05 CST ERCOT will be working from the Alternate Control Center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Aug 12 2021 15:24:55 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 07/13/2021 12:00 through 08/13/2021 18:00 due to a forced outage. Operational Information Cancelled
Aug 12 2021 08:47:48 CST The Daily RSASM for Thursday, August 12, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 12 2021 00:34:37 CST No sudden loss of generation greater than 450 MW occurred on August 11, 2021 Operational Information Active
Aug 11 2021 08:47:13 CST The Daily RSASM for Wednesday, August 11, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 11 2021 00:34:58 CST On August 10, 2021, a sudden loss of generation occurred at 13:34 totaling 564 MW. Frequency declined to 59.887 Hz, ERCOT load was 69, 847 MW. Operational Information Active
Aug 10 2021 15:58:25 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 19:10 for operating day 08/10/21 for 1.7 MW RRS HE01-24. Operational Information Cancelled
Aug 10 2021 13:37:50 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Aug 10 2021 13:34:30 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Aug 10 2021 08:48:43 CST The Daily RSASM for Tuesday, August 10, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 10 2021 08:15:48 CST ERCOT has cancelled the following notice: ERCOT is taking manual action for the Aspermont 138 kV Bus outage. Operational Information Cancelled
Aug 10 2021 07:25:23 CST ERCOT is taking manual action for the Aspermont 138 kV Bus outage. Operational Information Active
Aug 10 2021 01:20:18 CST No sudden loss of generation greater than 450 MW occurred on August 9, 2021. Operational Information Active
Aug 09 2021 18:18:50 CST ERCOT will execute a SASM at 19:10 for operating day 08/10/21 for 1.7 MW RRS HE01-24. Operational Information Active
Aug 09 2021 08:46:58 CST The Daily RSASM for Monday, August 9, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 09 2021 00:05:53 CST No sudden loss of generation greater than 450 MW occurred on August 8, 2021. Operational Information Active
Aug 08 2021 21:25:14 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 21:00 for operating day 08/09/21 for 1.7 mw RRS HE1-9, .7 mw RRS HE11, 1.7 mw RRS HE12-24, 1.7 mw REGDN HE10, .5 mw REGDN HE11, 1.7 mw REGUP HE10, and .5 mw REGUP HE11. Operational Information Cancelled
Aug 08 2021 20:23:40 CST ERCOT will execute a SASM at 21:00 for operating day 08/09/21 for 1.7 mw RRS HE1-9, .7 mw RRS HE11, 1.7 mw RRS HE12-24, 1.7 mw REGDN HE10, .5 mw REGDN HE11, 1.7 mw REGUP HE10, and .5 mw REGUP HE11. Operational Information Active
Aug 08 2021 08:47:01 CST The Daily RSASM for Sunday, August 8, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 08 2021 01:58:51 CST No sudden loss of generation greater than 450 MW occurred on August 7, 2021. Operational Information Active
Aug 07 2021 08:46:29 CST The Daily RSASM for Saturday, August 7, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 07 2021 00:12:00 CST No sudden loss of generation greater than 450 MW occurred on August 6, 2021. Operational Information Active
Aug 06 2021 14:15:57 CST DAM is complete, DRUC will begin at 1510. Operational Information Active
Aug 06 2021 13:25:28 CST DAM Solution Posting Postpone: ERCOT has postponed the deadline for the posting of the DAM solution for Operating Day 08/07/2021 due to due to AS insufficiency which has been resolved.. Advisory Cancelled
Aug 06 2021 08:53:18 CST The Daily RSASM for Friday, August 6, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 06 2021 08:52:47 CST ERCOT has cancelled the following notice: Posted to GCC notices: "The Daily RSASM for Friday, August 6, 2021 will not be occurring due to zero participating QSEs." Operational Information Cancelled
Aug 06 2021 08:52:20 CST Posted to GCC notices: "The Daily RSASM for Friday, August 6, 2021 will not be occurring due to zero participating QSEs." Operational Information Active
Aug 06 2021 04:36:24 CST No sudden loss of generation greater than 450 MW occurred on August 5, 2021. Operational Information Active
Aug 05 2021 21:20:20 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at [21:00] for operating day [08/05/21] for HE [24] for [RRS] MW [25]”. Operational Information Cancelled
Aug 05 2021 20:27:33 CST ERCOT will execute a SASM at [21:00] for operating day [08/05/21] for HE [24] for [RRS] MW [25]”. Operational Information Active
Aug 05 2021 08:47:11 CST The Daily RSASM for Thursday, August 5, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 05 2021 02:11:01 CST No sudden loss of generation greater than 450 MW occurred on August 4, 2021. Operational Information Active
Aug 04 2021 08:47:18 CST The Daily RSASM for Wednesday, August 4, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 04 2021 00:12:12 CST No sudden loss of generation greater than 450 MW occurred on August 3, 2021. Operational Information Active
Aug 03 2021 08:48:17 CST The Daily RSASM for Tuesday, August 3, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 03 2021 00:12:04 CST No sudden loss of generation greater than 450 MW occurred on August 2, 2021. Operational Information Active
Aug 02 2021 08:48:01 CST The Daily RSASM for Monday, August 2, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 02 2021 00:15:53 CST No sudden loss of generation greater than 450 MW occurred on August 1, 2021. Operational Information Active
Aug 01 2021 08:45:36 CST The Daily RSASM for Sunday, August 1, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Aug 01 2021 00:02:29 CST No sudden loss of generation greater than 450 MW occurred on July 31, 2021. Operational Information Active