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
Sep 23 2021 08:48:08 CST The Daily RSASM for Thursday, September 23, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 23 2021 03:40:45 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:40 for operating day 09/23/21 for HE05-08 for 30 MW RRS. Operational Information Cancelled
Sep 23 2021 02:05:59 CST ERCOT will execute a SASM at 02:40 for operating day 09/23/21 for HE05-08 for 30 MW RRS. Operational Information Active
Sep 23 2021 00:00:46 CST On 09/22/2021, a sudden loss of generation occurred at 09:15 totaling 624 MW. Frequency declined to 59.891 Hz, ERCOT load was 41, 615 MW Operational Information Active
Sep 22 2021 09:17:59 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Sep 22 2021 09:15:15 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Sep 22 2021 08:51:24 CST The Daily RSASM for Wednesday, September 22, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 22 2021 00:21:47 CST No sudden loss of generation greater than 450 MW occurred on September 21, 2021 Operational Information Active
Sep 21 2021 08:45:23 CST The Daily RSASM for Tuesday, September 21, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 21 2021 01:23:03 CST No sudden loss of generation greater than 450 MW occurred on September 20, 2021 Operational Information Active
Sep 20 2021 08:46:19 CST The Daily RSASM for Monday, September 20, 2021 will not occurring due to zero participating QSEs Operational Information Active
Sep 20 2021 00:11:58 CST No sudden loss of generation greater than 450 MW occurred on September 19, 2021. Operational Information Active
Sep 19 2021 15:18:49 CST DAM is complete, DRUC will begin at 1615. Operational Information Active
Sep 19 2021 13:28:14 CST DAM Solution Posting Postpone: ERCOT has postponed the deadline for the posting of the DAM solution for Operating Day 09/20/2021 due to an internal issue that is being investigated. Advisory Active
Sep 19 2021 08:48:06 CST The Daily RSASM for Sunday, September 19, 2021 will not occurring due to zero participating QSEs. Operational Information Active
Sep 19 2021 00:00:39 CST No sudden loss of generation greater than 450 MW occurred on September 18, 2021. Operational Information Active
Sep 18 2021 08:46:02 CST The Daily RSASM for Saturday, September 18, 2021 will not occurring due to zero participating QSEs. Operational Information Active
Sep 18 2021 00:02:25 CST No sudden loss of generation greater than 450 MW occurred on September 17, 2021. Operational Information Active
Sep 17 2021 18:14:55 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for Dolan Tap (DOLAN) to Whiting (WHITING) outage. Operational Information Cancelled
Sep 17 2021 10:53:10 CST ERCOT is taking manual actions to pre-posture for Dolan Tap (DOLAN) to Whiting (WHITING) outage. Operational Information Active
Sep 17 2021 08:47:10 CST The Daily RSASM for Friday, September 17, 2021 will not occurring due to zero participating QSEs. Operational Information Active
Sep 17 2021 00:13:27 CST No sudden loss of generation greater than 450 MW occurred on September 16, 2021. Advisory Active
Sep 16 2021 21:16:48 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at a time of 20:15 for operating day 09/17/21 for HE13-17 for 4.9 MW REGDN and 5 MW REGUP; for HE01-12, 18-24 for 5 MW RRS. Operational Information Cancelled
Sep 16 2021 19:51:55 CST ERCOT will execute a SASM at a time of 20:15 for operating day 09/17/21 for HE13-17 for 4.9 MW REGDN and 5 MW REGUP; for HE01-12, 18-24 for 5 MW RRS. Operational Information Active
Sep 16 2021 16:00:28 CST OCN for modifying the Panhandle Generic Transmission Constraint due to the current transmission outage topology. OCN Active
Sep 16 2021 10:50:00 CST DAM Close for OD 9/17/2021 was postponed until 10:37 for an internal issue that was resolved. Advisory Active
Sep 16 2021 10:40:29 CST ERCOT has cancelled the following notice: DAM close for OD 9/17/2021 has been postponed until 10:15 for an internal issue that has been resolved. Advisory Cancelled
Sep 16 2021 10:02:22 CST DAM close for OD 9/17/2021 has been postponed until 10:15 for an internal issue that has been resolved. Advisory Active
Sep 16 2021 08:46:24 CST The Daily RSASM for Thursday, September 16, 2021 will not occurring due to zero participating QSEs. Operational Information Active
Sep 16 2021 07:27:59 CST No sudden loss of generation greater than 450 MW occurred on September 15, 2021. Operational Information Active
Sep 16 2021 07:27:05 CST No sudden loss of generation greater than 450 MW occurred on September 14, 2021. Operational Information Active
Sep 16 2021 07:26:35 CST No sudden loss of generation greater than 450 MW occurred on September 13, 2021. Operational Information Active
Sep 15 2021 08:46:54 CST The Daily RSASM for Wednesday, September 15, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 15 2021 00:03:35 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Sep 15 2021 00:02:19 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Sep 14 2021 19:05:45 CST ERCOT has cancelled the following notice: At [11:00], ERCOT is issuing an OCN for Tropical Storm Nicholas due to a probability of making landfall in the ERCOT Region on Monday afternoon September 13th. OCN Cancelled
Sep 14 2021 19:05:29 CST ERCOT has cancelled the following notice: At [09:00], ERCOT is issuing an Advisory for Potential Hurricane Nicholas due to a probability of making landfall in the ERCOT Region on Monday afternoon September 13th. Advisory Cancelled
Sep 14 2021 19:05:17 CST ERCOT has cancelled the following notice: At [19:15], ERCOT is issuing a Watch for Potential Hurricane Nicholas due to a probability of making landfall in the ERCOT Region on Monday night September 13th. Watch Cancelled
Sep 14 2021 14:59:38 CST Cancelled RUC commitment at timestamp 9/14/2021 07:27 for B_DAVIS B_DAVIG1 for 9/14/21 15:00 – 22:00 due to unintended commitment. Operational Information Active
Sep 14 2021 08:47:15 CST The Daily RSASM for Tuesday, September 14, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 14 2021 07:05:40 CST ERCOT has cancelled the following notice: ERCOT has discovered an issue with the MIS page MMSUI Landing page for OD 09/14/2021. The issue is under investigation Advisory Cancelled
Sep 14 2021 05:43:14 CST ERCOT has discovered an issue with the MIS page MMSUI Landing page for OD 09/14/2021. The issue is under investigation Advisory Active
Sep 13 2021 20:35:27 CST All Non-Spin recalled: At 20:34, All Non-Spin has been recalled. Operational Information Active
Sep 13 2021 19:26:31 CST At [19:15], ERCOT is issuing a Watch for Potential Hurricane Nicholas due to a probability of making landfall in the ERCOT Region on Monday night September 13th. Watch Active
Sep 13 2021 19:09:02 CST Non-Spin deployed: At 19:07 approximately 295 MW of Non-Spin has been deployed, anticipated duration is 5 hours. Operational Information Active
Sep 13 2021 15:49:53 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Sep 13 2021 15:42:17 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Sep 13 2021 14:05:41 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 13:35 for operating day 09/13/21 for 19.3 mw RRS HE16, 16 mw RRS HE17, 6 mw REGDN HE19-24, 44.6 mw NSPIN HE22, and 25.4 mw NSPIN HE24. Operational Information Cancelled
Sep 13 2021 13:03:48 CST ERCOT will execute a SASM at 13:35 for operating day 09/13/21 for 19.3 mw RRS HE16, 16 mw RRS HE17, 6 mw REGDN HE19-24, 44.6 mw NSPIN HE22, and 25.4 mw NSPIN HE24. Operational Information Active
Sep 13 2021 09:05:25 CST At [09:00], ERCOT is issuing an Advisory for Potential Hurricane Nicholas due to a probability of making landfall in the ERCOT Region on Monday afternoon September 13th. Advisory Active
Sep 13 2021 09:00:05 CST At 3:25 PM on 9/13/2021, 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
Sep 13 2021 08:57:12 CST The Daily RSASM for Monday, September 13, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 13 2021 04:05:06 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 03:35 for operating day 09/13/21 for HE 06-18 for 6 MW of reg down and for HE 6 for 10 MW of reg up Operational Information Cancelled
Sep 13 2021 03:16:40 CST ERCOT will execute a SASM at 03:35 for operating day 09/13/21 for HE 06-18 for 6 MW of reg down and for HE 6 for 10 MW of reg up Operational Information Active
Sep 13 2021 00:28:36 CST On September 12, 2021, a sudden loss of generation occurred at 23:17 totaling 848 MW. Frequency declined to 59.832 Hz, ERCOT load was 47, 729 MW. Operational Information Active
Sep 12 2021 23:21:34 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Sep 12 2021 23:17:50 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Sep 12 2021 10:59:31 CST At [11:00], ERCOT is issuing an OCN for Tropical Storm Nicholas due to a probability of making landfall in the ERCOT Region on Monday afternoon September 13th. OCN Active
Sep 12 2021 08:46:45 CST Daily RSASM for Sunday, September 12, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 12 2021 00:59:42 CST No sudden loss of generation greater than 450 MW occurred on September 11, 2021. Operational Information Active
Sep 11 2021 08:46:12 CST Daily RSASM for Saturday, September 11, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 11 2021 00:01:22 CST No sudden loss of generation greater than 450 MW occurred on September 10, 2021. Operational Information Active
Sep 10 2021 08:46:09 CST The Daily RSASM for Friday, September 10, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 10 2021 04:08:21 CST ERCOT working from Alternate CC: 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
Sep 10 2021 01:43:20 CST On September 09, 2021, a sudden loss of generation occurred at 17:11 totaling 492 MW. Frequency declined to 59.908 Hz, ERCOT load was 67, 503 MW. Operational Information Active
Sep 09 2021 17:18:10 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Sep 09 2021 16:08:33 CST ERCOT working from Alternate CC: ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Sep 09 2021 08:46:12 CST The Daily RSASM for Thursday, September 9, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 09 2021 00:05:03 CST No sudden loss of generation greater than 450 MW occurred on September 8, 2021. Operational Information Active
Sep 08 2021 08:47:08 CST The Daily RSASM for Wednesday, September 8, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 08 2021 00:00:38 CST No sudden loss of generation greater than 450 MW occurred on September 7, 2021. Operational Information Active
Sep 07 2021 17:31:37 CST ERCOT has cancelled the OCN for the modifications of the PNHNDL Generic Transmission Constraint. OCN Active
Sep 07 2021 08:46:35 CST The Daily RSASM for Tuesday, September 7, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 07 2021 00:09:13 CST No sudden loss of generation greater than 450 MW occurred on September 6, 2021. Operational Information Active
Sep 06 2021 08:47:04 CST The Daily RSASM for Monday, September 6, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 06 2021 00:12:28 CST No sudden loss of generation greater than 450 MW occurred on September 5, 2021. Operational Information Active
Sep 05 2021 08:49:59 CST The Daily RSASM for Sunday, September 5, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 05 2021 00:10:46 CST No sudden loss of generation greater than 450 MW occurred on September 4, 2021. Operational Information Active
Sep 04 2021 08:48:28 CST The Daily RSASM for Saturday, September 4, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 04 2021 00:40:14 CST On 09/03/2021, a sudden loss of generation occurred at 02:49:15 totaling 601.20 MW. Frequency declined to 59.911 Hz, ERCOT load was 46, 385 MW. Operational Information Active
Sep 03 2021 08:50:05 CST The Daily RSASM for Friday, September 3, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 03 2021 00:43:32 CST No sudden loss of generation greater than 450 MW occurred on September 2, 2021. Operational Information Active
Sep 02 2021 08:47:42 CST The Daily RSASM for Thursday, September 2, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Sep 02 2021 01:16:39 CST No sudden loss of generation greater than 450 MW occurred on September 1, 2021. Operational Information Active
Sep 01 2021 08:45:58 CST The Daily RSASM for Wednesday, September 1, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Sep 01 2021 00:08:25 CST On August 31, 2021, a sudden loss of generation occurred at 17:40 totaling 508 MW. Frequency declined to 59.915 Hz, ERCOT load was 73, 191 MW. Operational Information Active