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
Jul 31 2021 08:45:49 CST The Daily RSASM for Saturday, July 31, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 31 2021 00:06:57 CST No sudden loss of generation greater than 450 MW occurred on July 30, 2021. Operational Information Active
Jul 30 2021 10:51:57 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at [09:30] for operating day [July 30, 2021] for (NonSpin HE 11 133mw, HE 12 133mw, HE 13 130mw)” Operational Information Cancelled
Jul 30 2021 08:55:16 CST ERCOT will execute a SASM at [09:30] for operating day [July 30, 2021] for (NonSpin HE 11 133mw, HE 12 133mw, HE 13 130mw)” Operational Information Active
Jul 30 2021 08:46:52 CST The Daily RSASM for Friday, July 30, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 30 2021 00:00:07 CST No sudden loss of generation greater than 450 MW occurred on July 29, 2021. Operational Information Active
Jul 29 2021 17:43:34 CST Market price correction for SCED. This notification is an update to the message sent at 13:23:31 on 7/28/2021 regarding SCED prices under investigation. ERCOT has identified a need to perform a price correction for the SCED intervals between 10:41:51 and 11:20:08 on Operating Day 7/28/2021, due to a SCED Failure. SCED prices from the last good SCED interval at 10:35:08 will be used for the impacted SCED intervals and held for an additional 15 minutes following the recovery of the SCED process at 11:10:04. ERCOT will also recalculate the impacted Real-Time Prices for Energy Metered for Resources (RTRMPRs) and Real-Time Settlement Point Prices (RTSPPs) for the Settlement Intervals between 10:45 and 11:30. Complete price correction data will be posted on ERCOT Market Information System as soon as possible but no later than 4PM of 7/30/2021, Friday. Alert Active
Jul 29 2021 08:45:32 CST The Daily RSASM for Thursday, July 29, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 29 2021 00:00:39 CST No sudden loss of generation greater than 450 MW occurred on July 28, 2021. Operational Information Active
Jul 28 2021 20:48:44 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 20:30 for operating day 07/28/21 for HE23-24 for 33 mw RRS. Operational Information Cancelled
Jul 28 2021 19:59:59 CST ERCOT will execute a SASM at 20:30 for operating day 07/28/21 for HE23-24 for 33 mw RRS. Operational Information Active
Jul 28 2021 16:52:45 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie has been derated to 150 MW Import/Export due to an outage until further notice. Operational Information Cancelled
Jul 28 2021 13:23:31 CST Notification of Prices Under Investigation: Notification of SCED prices under investigation. Due to an issue that resulted in a SCED Failure and associated Watch late this morning, ERCOT is investigating the Real-Time Prices for the time window during and immediately following the SCED Failure. With the issue, SCED did not execute between 10:41:51 AM and 11:10:04 AM. A follow-up notice will be sent out as soon as the investigation is complete. If a Real-Time price correction is needed for Operating Day 7/28/2021, the posting deadline is 16:00 on 7/30/2021, Friday. Alert Active
Jul 28 2021 11:14:16 CST SCED Failure: ERCOT has cancelled the following notice: ERCOT has declared a Watch due to the failure of the SCED process, starting at 11:02 Watch Cancelled
Jul 28 2021 11:13:06 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Jul 28 2021 11:02:06 CST SCED Failure: ERCOT has declared a Watch due to the failure of the SCED process, starting at 11:02 Watch Active
Jul 28 2021 10:49:02 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Jul 28 2021 08:46:19 CST The Daily RSASM for Wednesday, July 28, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 28 2021 00:00:31 CST No sudden loss of generation greater than 450 MW occurred on July 27, 2021. Operational Information Active
Jul 27 2021 10:45:48 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Jul 27 2021 10:45:03 CST ERCOT has cancelled the following notice: At 10:34, ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Cancelled
Jul 27 2021 10:37:20 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Jul 27 2021 10:34:11 CST At 10:34, ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Active
Jul 27 2021 08:46:55 CST The Daily RSASM for Tuesday, July 27, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 27 2021 00:00:07 CST No sudden loss of generation greater than 450 MW occurred on July 26, 2021. Operational Information Active
Jul 26 2021 08:52:12 CST The Daily RSASM for Monday, July 26, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 26 2021 00:21:26 CST No sudden loss of generation greater than 450 MW occurred on July 25, 2021. Operational Information Active
Jul 25 2021 08:47:26 CST The Daily RSASM for Sunday, July 25, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 25 2021 00:50:33 CST No sudden loss of generation greater than 450 MW occurred on July 24, 2021. Operational Information Active
Jul 24 2021 08:50:04 CST The Daily RSASM for Saturday, July 24, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 24 2021 00:07:09 CST No sudden loss of generation greater than 450 MW occurred on July 23, 2021. Operational Information Active
Jul 23 2021 22:27:20 CST ERCOT has been notified that the Railroad DC Tie has been derated to 150 MW Import/Export due to an outage until further notice. Operational Information Active
Jul 23 2021 08:48:46 CST The Daily RSASM for Friday, July 23, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 23 2021 00:45:34 CST No sudden loss of generation greater than 450 MW occurred on July 22, 2021. Operational Information Active
Jul 22 2021 08:48:11 CST The Daily RSASM for Thursday, July 22, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 22 2021 02:29:06 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 00:50 for operating day 07/22/21 for HE3 - HE8 11.9 MW, HE 9 12.6 MW, HE10 – HE15 11.7 MW, HE16-HE17 11.9 MW, HE18 - HE19 12.6 MW, HE20- HE24 11.9 MW all for reg down Operational Information Cancelled
Jul 22 2021 00:32:35 CST ERCOT will execute a SASM at 00:50 for operating day 07/22/21 for HE3 - HE8 11.9 MW, HE 9 12.6 MW, HE10 – HE15 11.7 MW, HE16-HE17 11.9 MW, HE18 - HE19 12.6 MW, HE20- HE24 11.9 MW all for reg down Operational Information Active
Jul 22 2021 00:00:47 CST No sudden loss of generation greater than 450 MW occurred on July 21, 2021. Operational Information Active
Jul 21 2021 08:46:34 CST The Daily RSASM for Wednesday July 21, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 21 2021 00:11:47 CST On July 20, 2021, a sudden loss of generation occurred at 08:46 totaling 846 MW. Frequency declined to 59.858 Hz, ERCOT load was 46, 103 MW. Operational Information Active
Jul 20 2021 08:49:43 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Jul 20 2021 08:46:11 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Jul 20 2021 08:45:42 CST The Daily RSASM for Tuesday July 20, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 20 2021 07:52:50 CST DC Tie Outage: 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 Active
Jul 20 2021 07:51:34 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 07/20/2021 16:00 due to a forced outage. Operational Information Cancelled
Jul 20 2021 00:04:30 CST No sudden loss of generation greater than 450 MW occurred on July 19, 2021. Operational Information Active
Jul 19 2021 19:15:21 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 18:45 for operating day 07/19/21 for HE 20 5.7MW, HE 21 9.9MW, HE 22 5.7MW, HE 23 9.9MW, HE 24 5.7MW for Reg up Operational Information Cancelled
Jul 19 2021 18:32:32 CST ERCOT will execute a SASM at 18:45 for operating day 07/19/21 for HE 20 5.7MW, HE 21 9.9MW, HE 22 5.7MW, HE 23 9.9MW, HE 24 5.7MW for Reg up Operational Information Active
Jul 19 2021 08:45:36 CST The Daily RSASM for Monday July 19, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Jul 19 2021 00:02:53 CST No sudden loss of generation greater than 450 MW occurred on July 18, 2021. Operational Information Active
Jul 18 2021 08:47:55 CST The Daily RSASM for Sunday, July 18, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 18 2021 00:09:01 CST No sudden loss of generation greater than 450 MW occurred on July 17, 2021. Operational Information Active
Jul 17 2021 08:47:02 CST The Daily RSASM for Saturday, July 17, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 17 2021 00:13:20 CST No sudden loss of generation greater than 450 MW occurred on July 16, 2021. Operational Information Active
Jul 16 2021 08:47:09 CST The Daily RSASM for Friday, July 16, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 16 2021 04:01:47 CST ERCOT will be working from the Primary Control Center until further notice, use the OPX numbers for Taylor. Operational Information Active
Jul 16 2021 00:08:39 CST No sudden loss of generation greater than 450 MW occurred on July 15, 2021. Operational Information Active
Jul 15 2021 08:47:39 CST The Daily RSASM for Thursday, July 15, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 15 2021 04:13:46 CST ERCOT will be working from the Alternate Control Center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Jul 15 2021 00:38:35 CST No sudden loss of generation greater than 450 MW occurred on July 14, 2021. Operational Information Active
Jul 14 2021 08:50:51 CST The Daily RSASM for Wednesday, July 14, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 14 2021 00:54:17 CST No sudden loss of generation greater than 450 MW occurred on July 13, 2021. Operational Information Active
Jul 13 2021 11:51:13 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 07/13/2021 12:00 through 07/20/2021 16:00 due to a forced outage. Operational Information Active
Jul 13 2021 08:54:34 CST The Daily RSASM for Tuesday, July 13, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 13 2021 08:50:49 CST The Daily RSASM for Monday, July 12, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 13 2021 00:11:14 CST No sudden loss of generation greater than 450 MW occurred on July 12, 2021. Operational Information Active
Jul 12 2021 16:31:12 CST ERCOT has cancelled the following notice: At 3:25 PM on 7/12/2021, 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 Cancelled
Jul 12 2021 15:48:02 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Jul 12 2021 15:42:18 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Jul 12 2021 15:26:44 CST DC Tie Curtailment Notice: ERCOT has cancelled the following notice: The DC_E (East) 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
Jul 12 2021 14:58:57 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 07/12/2021 14:30 through 07/13/2021 12:00 due to a forced outage. Operational Information Active
Jul 12 2021 14:57:22 CST DC Tie Curtailment Notice: The DC_E (East) 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
Jul 12 2021 08:56:22 CST At 3:25 PM on 7/12/2021, 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
Jul 11 2021 23:55:43 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Sunday, July 11, 2021 [HE 16 – HE 24]. OCN Cancelled
Jul 11 2021 08:46:50 CST The Daily RSASM for Sunday, July 11, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 11 2021 02:08:09 CST No sudden loss of generation greater than 450 MW occurred on July 10, 2021. Operational Information Active
Jul 10 2021 22:57:13 CST ERCOT issued an OCN due to a potential projected capacity shortage for Sunday, July 11, 2021 [HE 16 – HE 24]. OCN Active
Jul 10 2021 08:46:56 CST The Daily RSASM for Saturday, July 10, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 10 2021 00:06:08 CST No sudden loss of generation greater than 450 MW occurred on July 9, 2021. Operational Information Active
Jul 09 2021 08:46:23 CST The Daily RSASM for Friday, July 9, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 09 2021 00:12:26 CST No sudden loss of generation greater than 450 MW occurred on July 8, 2021. Operational Information Active
Jul 08 2021 22:46:13 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Thursday, July 8, 2021 [HE 12 – HE 22] OCN Cancelled
Jul 08 2021 08:47:14 CST The Daily RSASM for Thursday, July 8, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 08 2021 00:12:02 CST No sudden loss of generation greater than 450 MW occurred on July 7, 2021. Operational Information Active
Jul 07 2021 23:00:55 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Wednesday, July 7, 2021 [HE 13 – HE 23] OCN Cancelled
Jul 07 2021 22:11:19 CST ERCOT issued an OCN due to a potential projected capacity shortage for Thursday, July 8, 2021 [HE 12 – HE 22] OCN Active
Jul 07 2021 08:47:49 CST The Daily RSASM for Wednesday, July 7, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 07 2021 00:11:38 CST No sudden loss of generation greater than 450 MW occurred on July 6, 2021. Operational Information Active
Jul 07 2021 00:07:16 CST ERCOT issued an OCN due to a potential projected capacity shortage for Wednesday, July 7, 2021 [HE 13 – HE 23] OCN Active
Jul 07 2021 00:04:20 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Tuesday, July 6, 2021 [HE 15 – HE 24]. OCN Cancelled
Jul 06 2021 15:51:23 CST ERCOT issued an OCN due to a potential projected capacity shortage for Tuesday, July 6, 2021 [HE 15 – HE 24]. OCN Active
Jul 06 2021 15:50:48 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Tuesday, July 6, 2021 [HE 15 – HE 17]. OCN Cancelled
Jul 06 2021 14:04:54 CST ERCOT issued an OCN due to a potential projected capacity shortage for Tuesday, July 6, 2021 [HE 15 – HE 17]. OCN Active
Jul 06 2021 08:47:43 CST The Daily RSASM for Tuesday, July 6, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 06 2021 00:08:19 CST No sudden loss of generation greater than 450 MW occurred on July 5, 2021. Operational Information Active
Jul 05 2021 22:02:47 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Monday, July 5, 2021 [HE 14 – HE 22]. OCN Cancelled
Jul 05 2021 08:48:42 CST The Daily RSASM for Monday, July 5, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 05 2021 01:44:47 CST No sudden loss of generation greater than 450 MW occurred on July 4 2021. OCN Active
Jul 05 2021 00:11:47 CST ERCOT issued an OCN due to a potential projected capacity shortage for Monday, July 5, 2021 [HE 14 – HE 22]. OCN Active
Jul 04 2021 21:25:59 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Sunday, July 4, 2021 [HE 16 – HE 19]. OCN Cancelled
Jul 04 2021 08:47:15 CST The Daily RSASM for Sunday, July 4, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 04 2021 01:11:18 CST No sudden loss of generation greater than 450 MW occurred on July 3 2021. Operational Information Active
Jul 04 2021 01:07:05 CST ERCOT issued an OCN due to a potential projected capacity shortage for Sunday, July 4, 2021 [HE 16 – HE 19]. OCN Active
Jul 04 2021 01:04:03 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 16 – HE 19]. OCN Cancelled
Jul 04 2021 00:56:24 CST ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 16 – HE 19]. OCN Active
Jul 03 2021 22:00:57 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Saturday, July 3, 2021 [HE 13 – HE 22]. OCN Cancelled
Jul 03 2021 08:47:20 CST The Daily RSASM for Saturday, July 3, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 03 2021 01:37:59 CST No sudden loss of generation greater than 450 MW occurred on July 2 2021. Operational Information Active
Jul 03 2021 00:17:03 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 12 – HE 24]. OCN Cancelled
Jul 02 2021 22:04:57 CST ERCOT issued an OCN due to a potential projected capacity shortage for Saturday, July 3, 2021 [HE 13 – HE 22]. OCN Active
Jul 02 2021 08:47:16 CST The Daily RSASM for Friday, July 2, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 02 2021 01:46:43 CST No sudden loss of generation greater than 450 MW occurred on July 1 2021. Operational Information Active
Jul 02 2021 00:00:11 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Thursday, July 1, 2021 [HE 13 – HE 24]. OCN Cancelled
Jul 01 2021 23:38:10 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at a time of 23:25 for operating day 07/02/2021 for HE02-03 for 43 MW NSPIN Operational Information Cancelled
Jul 01 2021 22:50:25 CST ERCOT will execute a SASM at a time of 23:25 for operating day 07/02/2021 for HE02-03 for 43 MW NSPIN Operational Information Active
Jul 01 2021 22:01:59 CST ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 12 – HE 24]. OCN Active
Jul 01 2021 22:01:43 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 12 – HE 24]. Advisory Cancelled
Jul 01 2021 21:58:22 CST ERCOT issued an OCN due to a potential projected capacity shortage for Friday, July 2, 2021 [HE 12 – HE 24]. Advisory Active
Jul 01 2021 08:48:08 CST The Daily RSASM for Thursday, July 1, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 01 2021 00:54:28 CST No sudden loss of generation greater than 450 MW occurred on June 30 2021. Operational Information Active
Jul 01 2021 00:00:32 CST ERCOT has cancelled the following notice: ERCOT issued an OCN due to a potential projected capacity shortage for Wednesday, June 30, 2021 [HE 13 – HE 24]. OCN Cancelled