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Operations Messages

This section contains important messages from the ERCOT Control Room. Refresh this screen to see current operation messages. 

Nov 2023 Dec 2023 Jan 2024 Feb 2024 Mar 2024 Apr 2024
Date & Time Notice Type Status
Apr 23, 2024 8:47:05 AM The Daily RSASM for 04/23/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 23, 2024 12:03:37 AM No sudden loss of generation greater than 450 MW occurred on April 22, 2024. Operational Information Active
Apr 22, 2024 3:05:09 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [1435] for operating day [04/22/2024] HE 17 for 25MW NSPIN AND 2.2MW RRS HE 18 FOR 25MW NSPIN AND 2.2MW RRS HE 19 FOR 25MW REGUP AND 2.2MW RRS HE 20 FOR 25 MW ECRS AND 2.2MW RRS HE 21 FOR 5 MW ECRS AND 2.2MW RRS HE 22 FOR 3.1MW ECRS Operational Information Cancelled
Apr 22, 2024 2:12:21 PM ERCOT will execute a SASM at [1435] for operating day [04/22/2024] HE 17 for 25MW NSPIN AND 2.2MW RRS HE 18 FOR 25MW NSPIN AND 2.2MW RRS HE 19 FOR 25MW REGUP AND 2.2MW RRS HE 20 FOR 25 MW ECRS AND 2.2MW RRS HE 21 FOR 5 MW ECRS AND 2.2MW RRS HE 22 FOR 3.1MW ECRS Operational Information Active
Apr 22, 2024 8:48:01 AM The Daily RSASM for 04/22/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 22, 2024 12:00:28 AM No sudden loss of generation greater than 450 MW occurred on April 21, 2024. Operational Information Active
Apr 21, 2024 8:48:26 AM The Daily RSASM for Sunday, April 21, 2024, will not be occurring due to zero participating QSEs. Operational Information Active
Apr 21, 2024 12:00:30 AM No sudden loss of generation greater than 450 MW occurred on April 20, 2024. Operational Information Active
Apr 20, 2024 8:47:41 AM The Daily RSASM for Saturday, April 20, 2024, will not be occurring due to zero participating QSEs. Operational Information Active
Apr 20, 2024 12:00:43 AM No sudden loss of generation greater than 450 MW occurred on April 19, 2024. Operational Information Active
Apr 19, 2024 7:02:33 PM ERCOT has cancelled the following notice: Advisory issued for a geomagnetic disturbance of [K-7] until [04/19/2024 19:00]. Advisory Cancelled
Apr 19, 2024 7:02:22 PM ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 until 18:59 04/19/2024. Operational Information Cancelled
Apr 19, 2024 4:03:11 PM ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from 04/01/2024 09:30 through 04/19/2024 16:00 due to a planned outage. Operational Information Cancelled
Apr 19, 2024 4:02:38 PM Advisory issued for a geomagnetic disturbance of [K-7] until [04/19/2024 19:00]. Advisory Active
Apr 19, 2024 3:15:53 PM ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 until 23:59 04/19/2024. Operational Information Cancelled
Apr 19, 2024 3:15:44 PM The Space Weather Prediction Center has issued a GMD Warning of K-7 until 18:59 04/19/2024. Operational Information Active
Apr 19, 2024 3:09:22 PM The Space Weather Prediction Center has issued a GMD Warning of K-7 until 23:59 04/19/2024. Operational Information Active
Apr 19, 2024 8:48:47 AM The Daily RSASM for Friday, April 19, 2024, will not be occurring due to zero participating QSEs. Operational Information Active
Apr 19, 2024 12:04:25 AM No sudden loss of generation greater than 450 MW occurred on April 18, 2024. Operational Information Active
Apr 18, 2024 5:55:25 PM ERCOT has cancelled the following notice: Advisory issued due to ERCOTs Voltage Security Assessment Tool is currently unavailable. Advisory Cancelled
Apr 18, 2024 5:00:13 PM Advisory issued due to ERCOTs Voltage Security Assessment Tool is currently unavailable. Advisory Active
Apr 18, 2024 8:49:25 AM The Daily RSASM for Thursday, April 18, 2024, will not be occurring due to zero participating QSEs. Operational Information Active
Apr 18, 2024 12:03:52 AM No sudden loss of generation greater than 450 MW occurred on April 17, 2024. Operational Information Active
Apr 17, 2024 11:00:38 PM ERCOT has cancelled the following notice: ERCOT has executed the OSA process due to a possible future Emergency Condition of reserve capacity deficiency or reliability problem projected for OSA Period Tuesday April 16, 2024, at HE 1500 through Wednesday April 17, 2024, at HE 2300. Outages not moved voluntarily prior to Friday April 12, 2024, at 10:00 will be considered an OSA. OCN Cancelled
Apr 17, 2024 11:00:20 PM ERCOT has cancelled the following notice: At 10:00, ERCOT is updating an AAN due to conditions changing and a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday April 16, 2024, at HE 1500 through Wednesday April 17, 2024, at HE 2300. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek up to 4,867 MW from an OAE and then make the OSA. On April 12, 2024, at 10:00 ERCOT will execute an OSA if deemed necessary. Please notify ERCOT by email aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Cancelled
Apr 17, 2024 11:00:07 PM ERCOT has cancelled the following notice: At 10:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday, April 16, 2024 at HE 1400 through Wednesday, April 17, 2024 at HE 2300. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek 9,950 MW from an OAE and then make the OSA. On Friday, April 12, 2024 at 10:00 ERCOT will execute an OAE if deemed necessary. Please notify ERCOT by email at aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Cancelled
Apr 17, 2024 8:48:09 AM The Daily RSASM for Wednesday April 17, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 17, 2024 12:04:50 AM No sudden loss of generation greater than 450 MW occurred on April 16, 2024. Operational Information Active
Apr 16, 2024 8:32:50 PM ERCOT ECRS HAS BEEN RECALLED Operational Information Cancelled
Apr 16, 2024 7:58:26 PM ERCOT ECRS HAS BEEN DEPLOYED Operational Information Active
Apr 16, 2024 8:46:42 AM The Daily RSASM for Tuesday April 16, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 16, 2024 12:05:58 AM No sudden loss of generation greater than 450 MW occurred on April 15, 2024. Operational Information Active
Apr 15, 2024 8:48:52 AM The Daily RSASM for Monday, April 15, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 15, 2024 8:08:24 AM The DC_E (East) DC Tie will be unavailable from 04/15/2024 08:06 through 05/24/2024 16:00 due to a planned outage. Operational Information Active
Apr 15, 2024 8:07:18 AM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 04/15/2024 08:00 through 05/24/2024 16:00 due to a planned outage. Operational Information Cancelled
Apr 15, 2024 7:46:46 AM 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 Active
Apr 15, 2024 7:45:41 AM ERCOT has cancelled the following notice: The DC_R (Railroad) DC Tie will be unavailable from 04/15/2024 07:00 through 05/03/2024 15:00 due to a planned outage. Operational Information Cancelled
Apr 15, 2024 12:08:34 AM No sudden loss of generation greater than 450 MW occurred on April 14, 2024. Operational Information Active
Apr 14, 2024 8:47:39 AM The Daily RSASM for Sunday, April 14, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 14, 2024 12:07:33 AM On 04/13/2024, a sudden loss of generation occurred at 18:05:08 totaling 447.30 MW. Frequency declined to 59.931 Hz, ERCOT load was 51,322 MW. Operational Information Active
Apr 13, 2024 10:00:22 AM The DC_R (Railroad) DC Tie will be unavailable from 04/15/2024 07:00 through 05/03/2024 15:00 due to a planned outage. Operational Information Active
Apr 13, 2024 8:47:25 AM The Daily RSASM for Saturday, April 13, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 13, 2024 7:44:40 AM The DC_E (East) DC Tie will be unavailable from 04/15/2024 08:00 through 05/24/2024 16:00 due to a planned outage. Operational Information Active
Apr 13, 2024 12:23:01 AM No sudden loss of generation greater than 450 MW occurred on April 12, 2024. Operational Information Active
Apr 12, 2024 10:46:04 AM ERCOT has executed the OSA process due to a possible future Emergency Condition of reserve capacity deficiency or reliability problem projected for OSA Period Tuesday April 16, 2024, at HE 1500 through Wednesday April 17, 2024, at HE 2300. Outages not moved voluntarily prior to Friday April 12, 2024, at 10:00 will be considered an OSA. OCN Active
Apr 12, 2024 10:00:40 AM At 10:00, ERCOT is updating an AAN due to conditions changing and a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday April 16, 2024, at HE 1500 through Wednesday April 17, 2024, at HE 2300. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek up to 4,867 MW from an OAE and then make the OSA. On April 12, 2024, at 10:00 ERCOT will execute an OSA if deemed necessary. Please notify ERCOT by email aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Active
Apr 12, 2024 8:48:10 AM The Daily RSASM for Friday, April 12, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 12, 2024 3:47:56 AM ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Apr 12, 2024 3:47:43 AM 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
Apr 12, 2024 12:02:07 AM No sudden loss of generation greater than 450 MW occurred on April 11, 2024. Operational Information Active
Apr 11, 2024 10:00:11 PM ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Apr 11, 2024 10:00:14 AM At 10:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning Tuesday, April 16, 2024 at HE 1400 through Wednesday, April 17, 2024 at HE 2300. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek 9,950 MW from an OAE and then make the OSA. On Friday, April 12, 2024 at 10:00 ERCOT will execute an OAE if deemed necessary. Please notify ERCOT by email at aan@ercot.com if a specific resource cannot be considered in the OAE. OCN Active
Apr 11, 2024 8:47:31 AM The Daily RSASM for Thursday, April 11, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 11, 2024 12:04:38 AM No sudden loss of generation greater than 450 MW occurred on April 10, 2024. Operational Information Active
Apr 10, 2024 10:25:11 PM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 04/10/2024 20:55 through 04/10/2024 23:59 due to a forced outage. Operational Information Cancelled
Apr 10, 2024 9:00:46 PM The DC_E (East) DC Tie will be unavailable from 04/10/2024 20:55 through 04/10/2024 23:59 due to a forced outage. Operational Information Active
Apr 10, 2024 8:48:42 AM The Daily RSASM for Wednesday, April 10, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 10, 2024 6:36:45 AM ERCOT has cancelled the following notice: ERCOT is taking manual action to pre-posture for a 345kV planned outage in the South Texas area. Operational Information Cancelled
Apr 10, 2024 5:51:15 AM On 04/09/2024, a sudden loss of generation occurred at 06:12 totaling 560 MW. Frequency declined to 59.938 Hz, ERCOT load was 43,990 MW. Operational Information Active
Apr 10, 2024 5:23:15 AM ERCOT has cancelled the following notice: No sudden loss of generation greater than 450 MW occurred on April 9, 2024 Operational Information Cancelled
Apr 10, 2024 5:20:05 AM ERCOT is taking manual action to pre-posture for a 345kV planned outage in the South Texas area. Operational Information Active
Apr 10, 2024 12:18:22 AM No sudden loss of generation greater than 450 MW occurred on April 9, 2024 Operational Information Active
Apr 9, 2024 11:49:21 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [10:30] for operating day [04/09/24] for REGUP for HE16 - HE17 80MW each hour; HE19 100MW; HE21 30MW; HE23 97.1MW, for REGDN- HE14 47.2MW; HE15 60MW; HE17 20MW; HE22 - HE23 80MW for each hour, for ECRS- HE20 - HE21 75MWRRS- HE15 32.1MW; HE18 39.5MW; HE20 45MW; HE21 15MW; HE22 62.5MW Operational Information Cancelled
Apr 9, 2024 9:47:50 AM ERCOT will execute a SASM at [10:30] for operating day [04/09/24] for REGUP for HE16 - HE17 80MW each hour; HE19 100MW; HE21 30MW; HE23 97.1MW, for REGDN- HE14 47.2MW; HE15 60MW; HE17 20MW; HE22 - HE23 80MW for each hour, for ECRS- HE20 - HE21 75MWRRS- HE15 32.1MW; HE18 39.5MW; HE20 45MW; HE21 15MW; HE22 62.5MW Operational Information Active
Apr 9, 2024 8:51:31 AM The Daily RSASM for Tuesday, April 9, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 9, 2024 12:03:55 AM On 04/08/2024, a sudden loss of generation occurred at 22:29 totaling 472.01 MW. Frequency declined to 59.940Hz, ERCOT load was 49,059 MW. Operational Information Active
Apr 8, 2024 1:48:40 PM At 13:48, All Non-Spin has been recalled. Operational Information Active
Apr 8, 2024 1:47:57 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2024-04-08 13:47:56, END_TIME: 2024-04-08 13:47:56, DURATION: 0 Hrs 0 Mins.; Operational Information
Apr 8, 2024 1:42:09 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 934.5, BEGIN_TIME: 2024-04-08 13:42:09, END_TIME: 2024-04-08 23:59:59, DURATION: 10 Hrs 17 Mins.; Operational Information
Apr 8, 2024 1:39:18 PM ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture slower ramping resources to allow faster ramping resources to be available during the solar eclipse. Operational Information Cancelled
Apr 8, 2024 1:33:02 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1800.0, BEGIN_TIME: 2024-04-08 14:00:00, END_TIME: 2024-04-08 23:59:59, DURATION: 9 Hrs 59 Mins.; Operational Information
Apr 8, 2024 12:47:21 PM At 12:46 approximately 2433 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
Apr 8, 2024 12:46:06 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 2433.7, BEGIN_TIME: 2024-04-08 12:46:05, END_TIME: 2024-04-08 23:59:59, DURATION: 11 Hrs 13 Mins.; Operational Information
Apr 8, 2024 11:31:22 AM ERCOT is taking manual actions to pre-posture slower ramping resources to allow faster ramping resources to be available during the solar eclipse. Operational Information Active
Apr 8, 2024 11:03:20 AM The DC_E (East) DC Tie will be unavailable from 04/15/2024 08:00 through 05/24/2024 16:00 due to a planned outage. Operational Information Active
Apr 8, 2024 8:48:35 AM The Daily RSASM for Monday, April 8, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 8, 2024 12:09:00 AM No sudden loss of generation greater than 450 MW occurred on April 7, 2024 Operational Information Active
Apr 7, 2024 8:48:02 AM The Daily RSASM for 04/07/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 7, 2024 12:10:59 AM No sudden loss of generation greater than 450 MW occurred on April 6, 2024 Operational Information Active
Apr 6, 2024 8:47:23 AM The Daily RSASM for 04/06/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 6, 2024 12:12:07 AM No sudden loss of generation greater than 450 MW occurred on April 5, 2024 Operational Information Active
Apr 5, 2024 9:02:24 AM ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a 345 KV planned outage in the Panhandle area. Operational Information Cancelled
Apr 5, 2024 8:47:17 AM The Daily RSASM for 04/05/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 5, 2024 8:15:32 AM ERCOT is taking manual actions to pre-posture for a 345 KV planned outage in the Panhandle area. Operational Information Active
Apr 5, 2024 12:19:19 AM No sudden loss of generation greater than 450 MW occurred on April 4, 2024 Operational Information Active
Apr 4, 2024 8:00:47 PM At 20:00, All Non-Spin has been recalled. Operational Information Active
Apr 4, 2024 8:00:26 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2024-04-04 20:00:26, END_TIME: 2024-04-04 20:00:26, DURATION: 0 Hrs 0 Mins.; Operational Information
Apr 4, 2024 7:33:01 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1351.1, BEGIN_TIME: 2024-04-04 20:00:00, END_TIME: 2024-04-04 23:59:59, DURATION: 3 Hrs 59 Mins.; Operational Information
Apr 4, 2024 6:36:38 PM At 18:35 approximately 1140 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
Apr 4, 2024 6:35:03 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1140.2, BEGIN_TIME: 2024-04-04 18:35:03, END_TIME: 2024-04-04 23:59:59, DURATION: 5 Hrs 24 Mins.; Operational Information
Apr 4, 2024 6:33:01 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1008.2, BEGIN_TIME: 2024-04-04 19:00:00, END_TIME: 2024-04-04 23:59:59, DURATION: 4 Hrs 59 Mins.; Operational Information
Apr 4, 2024 6:27:23 PM At 18:26 approximately 997 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
Apr 4, 2024 6:26:31 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 997.9, BEGIN_TIME: 2024-04-04 18:26:31, END_TIME: 2024-04-04 23:59:59, DURATION: 5 Hrs 33 Mins.; Operational Information
Apr 4, 2024 8:48:09 AM The Daily RSASM for 04/04/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 4, 2024 12:28:51 AM No sudden loss of generation greater than 450 MW occurred on April 3, 2024 Operational Information Active
Apr 3, 2024 2:48:48 PM Market price correction for SCED. ERCOT has identified a need to perform a price correction for the Real-Time Settlement Intervals 11:30, 11:45, and 12:00 on Operating Day 4/2/2024. This was due to SCED failing while trying to process invalid telemetry. In accordance with ERCOT Protocol Section 6.5.9.2(2), in the event of a SCED failure, the Locational Marginal Prices (LMPs) from the last valid SCED run (11:10) will be held for all impacted SCED intervals including a 15 minute period after the first valid SCED run after the issue is resolved (11:32). Price Correction data will be posted to the ERCOT MIS by 16:00 on 4/4/204. Alert Active
Apr 3, 2024 8:51:32 AM The Daily RSASM for Wednesday, April 3, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 3, 2024 12:30:23 AM No sudden loss of generation greater than 450 MW occurred on April 2, 2024 Operational Information Active
Apr 2, 2024 11:39:29 AM ERCOT has cancelled the following notice: ERCOT has declared a Watch due to the failure of the SCED process, starting at 11:22 Watch Cancelled
Apr 2, 2024 11:37:26 AM ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Apr 2, 2024 11:22:50 AM ERCOT has declared a Watch due to the failure of the SCED process, starting at 11:22 Watch Active
Apr 2, 2024 11:12:34 AM ERCOT Emergency Base Points are Enabled Operational Information Active
Apr 2, 2024 8:47:34 AM The Daily RSASM for Tuesday, April 2, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 2, 2024 1:54:59 AM No sudden loss of generation greater than 450 MW occurred on April 1, 2024. Operational Information Active
Apr 1, 2024 8:48:57 AM The Daily RSASM for Monday, April 1, 2024 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 1, 2024 12:16:49 AM No sudden loss of generation greater than 450 MW occurred on March 31, 2024. Operational Information Active