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
May 31 2021 09:03:44 CST The Daily RSASM for Monday, May 31, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 31 2021 00:21:27 CST No sudden loss of generation greater than 450 MW occurred on May 30, 2021. Operational Information Active
May 30 2021 08:47:39 CST The Daily RSASM for Sunday, May 30, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 30 2021 00:12:34 CST No sudden loss of generation greater than 450 MW occurred on May 29, 2021. Operational Information Active
May 29 2021 08:46:27 CST The Daily RSASM for Saturday, May 29, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 29 2021 00:55:35 CST No sudden loss of generation greater than 450 MW occurred on May 28, 2021. Operational Information Active
May 28 2021 10:48:50 CST Notification of Market Price Correction: Market price correction for SCED. ERCOT has identified a need to perform a price correction for SCED Interval at 18:00:22 on OD 5/26/2021, due to planned system maintenance. During this event, Electric Bus LMPs and Settlement Point LMPs were incorrectly calculated for that SCED interval, which then impacted the Real-Time Prices for Energy Metered for Resources (RTRMPR) and Real-Time Settlement Point Prices (RTSPP) of Settlement Interval Ending 18:15. Completed price correction data will be posted on ERCOT Market Information System as soon as possible, but no later than 16:00 on 5/28/2021, Friday. Advisory Active
May 28 2021 08:46:29 CST The Daily RSASM for Friday, May 28, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 28 2021 00:02:04 CST No sudden loss of generation greater than 450 MW occurred on May 27, 2021. Operational Information Active
May 27 2021 15:48:51 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
May 27 2021 15:47:23 CST ERCOT Emergency Base Points are Enabled Operational Information Active
May 27 2021 15:04:43 CST ERCOT has cancelled the following notice: AEP331400/Group HVDC is a one day outage on the Monticello SES (MNSES) to Welsh (WLSH) 345kV line ‘DC_E1’ and the associated equipment on Thursday 05/27/20 at 07:30 until 15:30. During this time the East HVDC will be unavailable. Operational Information Cancelled
May 27 2021 08:49:14 CST The Daily RSASM for Thursday, May 27, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 27 2021 00:04:45 CST On May 26, 2021, a sudden loss of generation occurred at 23:14 totaling 471 MW. Frequency declined to 59.864 Hz, ERCOT load was 48, 363 MW. Operational Information Active
May 26 2021 23:17:36 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 26 2021 23:14:32 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 26 2021 19:25:45 CST End of ERCOT Emergency Notification Test: At 19:25, the test of the ERCOT Emergency Notification System ended. Emergency Notice Active
May 26 2021 19:05:12 CST ERCOT Emergency Notification Test: At 19:05, this is a test of the ERCOT Emergency Notification System. No action is required. Emergency Notice Active
May 26 2021 08:47:53 CST The Daily RSASM for Wednesday, May 26, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 26 2021 08:39:17 CST AEP331400/Group HVDC is a one day outage on the Monticello SES (MNSES) to Welsh (WLSH) 345kV line ‘DC_E1’ and the associated equipment on Thursday 05/27/20 at 07:30 until 15:30. During this time the East HVDC will be unavailable. Operational Information Active
May 26 2021 00:08:24 CST On May 25, 2021, a sudden loss of generation occurred at 07:02 totaling 473 MW. Frequency declined to 59.850 Hz, ERCOT load was 39, 900 MW. Operational Information Active
May 25 2021 08:48:27 CST The Daily RSASM for Tuesday, May 25, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 25 2021 07:07:05 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 25 2021 07:02:25 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 25 2021 00:09:24 CST On May 24, 2021, a sudden loss of generation occurred at 20:03 totaling 823 MW. Frequency declined to 59.851 Hz, ERCOT load was 47, 603 MW. Operational Information Active
May 24 2021 20:08:29 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 24 2021 20:03:21 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 24 2021 08:47:36 CST The Daily RSASM for Monday, May 24, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 24 2021 05:06:58 CST ERCOT has cancelled the following notice: The Laredo DC Tie has been released from its Forced Outage and is available. Operational Information Cancelled
May 24 2021 00:31:00 CST No sudden loss of generation greater than 450 MW occurred on May 23, 2021. Operational Information Active
May 23 2021 08:49:05 CST The Daily RSASM for Sunday, May 23, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 23 2021 00:27:01 CST No sudden loss of generation greater than 450 MW occurred on May 22, 2021. Operational Information Active
May 22 2021 08:47:56 CST The Daily RSASM for Saturday, May 22, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 22 2021 00:28:09 CST No sudden loss of generation greater than 450 MW occurred on May 21, 2021. Operational Information Active
May 21 2021 08:48:25 CST The Daily RSASM for Friday, May 21, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 21 2021 00:58:07 CST No sudden loss of generation greater than 450 MW occurred on May 20, 2021. Operational Information Active
May 20 2021 20:50:28 CST The Laredo DC Tie has been released from its Forced Outage and is available. Operational Information Active
May 20 2021 20:49:01 CST ERCOT has cancelled the following notice: The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Cancelled
May 20 2021 20:48:50 CST DC Tie Outage: ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 00:00 05/21/2021 due to a forced outage. Operational Information Cancelled
May 20 2021 16:38:45 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 14:00 05/20/2021 due to a forced outage. Operational Information Cancelled
May 20 2021 16:37:34 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 00:00 05/21/2021 due to a forced outage. Operational Information Active
May 20 2021 08:47:55 CST The Daily RSASM for Thursday, May 20, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 20 2021 00:13:34 CST No sudden loss of generation greater than 450 MW occurred on May 19, 2021. Operational Information Active
May 19 2021 20:44:30 CST ERCOT has cancelled the following notice: The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Cancelled
May 19 2021 20:44:22 CST The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Active
May 19 2021 20:35:54 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 22:00 05/19/2021 due to a forced outage. Operational Information Cancelled
May 19 2021 20:35:43 CST The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 14:00 05/20/2021 due to a forced outage. Operational Information Active
May 19 2021 15:49:54 CST ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 18:00 05/19/2021 due to a forced outage. Operational Information Cancelled
May 19 2021 15:49:44 CST The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 22:00 05/19/2021 due to a forced outage. Operational Information Active
May 19 2021 15:46:49 CST ERCOT has cancelled the following notice: The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Cancelled
May 19 2021 15:46:30 CST The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Active
May 19 2021 12:10:37 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 19 2021 12:07:05 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 19 2021 08:47:26 CST The Daily RSASM for Wednesday, May 19, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 19 2021 05:08:30 CST June 1, 2021 The minimum monthly Ancillary Services quantities have been posted to the ERCOT Website Data Products Grid Forecasts under the Projected Ancillary Service Requirements link located under the Reports Extracts 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/secure/data-products/grid/forecasts Operational Information Active
May 19 2021 00:15:08 CST No sudden loss of generation greater than 450 MW occurred on May 18, 2021. Operational Information Active
May 18 2021 19:10:58 CST ERCOT has cancelled the following notice: The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Cancelled
May 18 2021 19:10:43 CST The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Active
May 18 2021 19:09:13 CST DC Tie Outage: ERCOT has cancelled the following notice: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 00:00 05/19/2021 due to a forced outage. Operational Information Cancelled
May 18 2021 19:08:57 CST The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 18:00 05/19/2021 due to a forced outage. Operational Information Active
May 18 2021 17:10:15 CST DC Tie Curtailment Notice: ERCOT has cancelled the following notice: The Laredo 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 18 2021 16:47:59 CST The Laredo DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage. Operational Information Active
May 18 2021 15:07:27 CST DC Tie Curtailment Notice: The Laredo 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 18 2021 08:47:13 CST The Daily RSASM for Tuesday, May 18, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 18 2021 02:01:59 CST No sudden loss of generation greater than 450 MW occurred on May 17, 2021. Operational Information Active
May 18 2021 00:17:24 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 23:00 05/17/2021 through 00:00 05/19/2021 due to a forced outage. Operational Information Active
May 17 2021 08:47:23 CST The Daily RSASM for Monday, May 17, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 17 2021 00:01:11 CST No sudden loss of generation greater than 450 MW occurred on May 16, 2021. Operational Information Active
May 16 2021 08:46:42 CST The Daily RSASM for Sunday May 16, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 16 2021 00:32:23 CST No sudden loss of generation greater than 450 MW occurred on May 15, 2021. Operational Information Active
May 15 2021 08:46:53 CST The Daily RSASM for Saturday May 15, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 15 2021 00:00:44 CST No sudden loss of generation greater than 450 MW occurred on May 14, 2021. Operational Information Active
May 14 2021 08:48:41 CST The Daily RSASM for Friday May 14, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 14 2021 04:09:12 CST ERCOT has cancelled the following notice: ERCOT is working from the Alternate Control Center, use the OPX numbers for Bastrop. Operational Information Cancelled
May 14 2021 04:08:56 CST ERCOT is working from the Primary Control Center, use the OPX numbers for Taylor. Operational Information Active
May 14 2021 00:09:32 CST No sudden loss of generation greater than 450 MW occurred on May 13, 2021. Operational Information Active
May 13 2021 16:10:51 CST ERCOT is working from the Alternate Control Center, use the OPX numbers for Bastrop. Operational Information Active
May 13 2021 08:46:28 CST The Daily RSASM for Thursday 14, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 13 2021 00:14:52 CST No sudden loss of generation greater than 450 MW occurred on May 12, 2021. Operational Information Active
May 12 2021 13:42:11 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K7 for 05/12/2021, 08:00-23:59. Operational Information Cancelled
May 12 2021 13:41:59 CST The Space Weather Prediction Center has issued a GMD Warning of K7 for 05/12/2021, 08:00-18:59. Operational Information Active
May 12 2021 13:17:30 CST The Space Weather Prediction Center has issued a GMD Warning of K7 for 05/12/2021, 08:00-23:59. Operational Information Active
May 12 2021 13:04:03 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Alert of K7 for 05/12/2021, 08:00-13:00. Operational Information Cancelled
May 12 2021 13:03:55 CST ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Alert of K7 for 05/12/2021, 08:00-13:00. Operational Information Cancelled
May 12 2021 08:47:19 CST The Daily RSASM for Wednesday May 12, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 12 2021 08:14:31 CST The Space Weather Prediction Center has issued a GMD Alert of K7 for 05/12/2021, 08:00-13:00. Operational Information Active
May 12 2021 00:42:24 CST No sudden loss of generation greater than 450 MW occurred on May 11, 2021. Operational Information Active
May 11 2021 08:47:23 CST The Daily RSASM for Tuesday May 11, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 11 2021 03:22:00 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:40 for operating day 05/11/21 for HE 05-08 for 9.7 MW RRS. Operational Information Cancelled
May 11 2021 02:05:45 CST ERCOT will execute a SASM at 02:40 for operating day 05/11/21 for HE 05-08 for 9.7 MW RRS. Operational Information Active
May 11 2021 00:22:46 CST No sudden loss of generation greater than 450 MW occurred on May 10, 2021. Operational Information Active
May 10 2021 22:07:00 CST ERCOT has cancelled the following notice: At 15:25 on 5/10/2021, ERCOT will perform a 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 10 2021 15:45:32 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
May 10 2021 15:42:24 CST ERCOT Emergency Base Points are Enabled Operational Information Active
May 10 2021 11:00:41 CST At 15:25 on 5/10/2021, ERCOT will perform a 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 10 2021 08:49:32 CST The Daily RSASM for Monday May 10, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 10 2021 00:16:50 CST On May 9, 2021, a sudden loss of generation occurred at 11:21 totaling 1176 MW. Frequency declined to 59.817 Hz, ERCOT load was 47, 434 MW. Operational Information Active
May 09 2021 11:24:10 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
May 09 2021 11:21:42 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
May 09 2021 08:45:27 CST The Daily RSASM for Sunday May 9, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 09 2021 00:03:16 CST No sudden loss of generation greater than 450 MW occurred on May 08, 2021. Operational Information Active
May 08 2021 08:46:17 CST The Daily RSASM for Saturday May 8, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 08 2021 01:13:27 CST No sudden loss of generation greater than 450 MW occurred on May 07, 2021. Operational Information Active
May 07 2021 08:45:46 CST The Daily RSASM for Friday May 7, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 07 2021 00:05:07 CST No sudden loss of generation greater than 450 MW occurred on May 06, 2021. Operational Information Active
May 06 2021 08:46:04 CST The Daily RSASM for Thursday May 6, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 06 2021 00:16:30 CST No sudden loss of generation greater than 450 MW occurred on May 05, 2021. Operational Information Active
May 05 2021 13:11:36 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 08:00 05/10/2021 through 16:00 05/14/2021 due to a planned outage. Operational Information Active
May 05 2021 08:46:18 CST The Daily RSASM for Wednesday May 5, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 05 2021 00:00:04 CST No sudden loss of generation greater than 450 MW occurred on May 04, 2021. Operational Information Active
May 04 2021 08:57:52 CST The Daily RSASM for Tuesday May 4, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 04 2021 00:03:41 CST No sudden loss of generation greater than 450 MW occurred on May 03, 2021. Operational Information Active
May 03 2021 21:09:28 CST ERCOT has cancelled the following notice: ERCOT has updated the AAN for a possible future Emergency Condition of reserve capacity deficiency beginning May 3, 2021 HE 14 until May 3, 2021 HE 21 based on changed conditions. QSEs have updated their Resource COPs and their Outage Scheduler. At this time, ERCOT does not seek additional capacity and will not be issuing any OSAs. ERCOT has posted an updated AAN Planning Assessment for reference. Operational Information Cancelled
May 03 2021 08:46:47 CST The Daily RSASM for Monday May 3, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 03 2021 00:05:08 CST No sudden loss of generation greater than 450 MW occurred on May 02, 2021. Operational Information Active
May 02 2021 08:46:50 CST The Daily RSASM for Sunday May 2, 2021 will not be occurring due to zero participating QSEs Operational Information Active
May 02 2021 00:02:20 CST No sudden loss of generation greater than 450 MW occurred on May 01, 2021. Operational Information Active
May 01 2021 08:46:54 CST The Daily RSASM for Saturday May 1, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
May 01 2021 00:05:57 CST On 04/30/21, a sudden loss of generation occurred at 22:14 totaling 775.00 MW. Frequency declined to 59.823 Hz, ERCOT load was 38, 739 MW. Operational Information Active