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Operations Messages

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

Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025
Date & Time Notice Type Status
Aug 24, 2025 1:49:58 AM No sudden loss of generation greater than 450 MW occurred on August 23, 2025. Operational Information Active
Aug 23, 2025 7:11:47 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 18:40 for operating day 08/23/25 HE21 through operating day 08/24/25 HE 24 for REGUP 9.0 MW each hour and for REGDN, [08/23/25] HE21: 3.8 MW, HE22: 4 MW, HE23: 3.8 MW, HE24: 4 MW; [08/24/25] HE01: 3.8 MW, HE02: 4 MW, HE03: 3.8 MW, HE04: 4 MW, HE05: 3.8 MW, HE06: 4 MW, HE07: 3.8 MW, HE08: 4 MW, HE09: 3.8 MW, HE10: 4.5 MW, HE11: 4.3 MW, HE12: 4 MW, HE13: 3.8 MW, HE14: 4 MW, HE15: 3.8 MW, HE16: 4 MW, HE17: 3.8 MW, HE18: 4 MW, HE19: 4.3 MW, HE20: 4.5 MW, HE21: 3.8 MW, HE22: 4 MW, HE23: 3.8 MW, HE24: 4 MW Operational Information Cancelled
Aug 23, 2025 6:04:48 PM ERCOT will execute a SASM at 18:40 for operating day 08/23/25 HE21 through operating day 08/24/25 HE 24 for REGUP 9.0 MW each hour and for REGDN, [08/23/25] HE21: 3.8 MW, HE22: 4 MW, HE23: 3.8 MW, HE24: 4 MW; [08/24/25] HE01: 3.8 MW, HE02: 4 MW, HE03: 3.8 MW, HE04: 4 MW, HE05: 3.8 MW, HE06: 4 MW, HE07: 3.8 MW, HE08: 4 MW, HE09: 3.8 MW, HE10: 4.5 MW, HE11: 4.3 MW, HE12: 4 MW, HE13: 3.8 MW, HE14: 4 MW, HE15: 3.8 MW, HE16: 4 MW, HE17: 3.8 MW, HE18: 4 MW, HE19: 4.3 MW, HE20: 4.5 MW, HE21: 3.8 MW, HE22: 4 MW, HE23: 3.8 MW, HE24: 4 MW Operational Information Active
Aug 23, 2025 8:46:50 AM The Daily RSASM for 08/23/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 23, 2025 12:05:51 AM No sudden loss of generation greater than 450 MW occurred on August 22, 2025. Operational Information Active
Aug 22, 2025 8:46:17 AM The Daily RSASM for 08/22/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 22, 2025 12:10:11 AM No sudden loss of generation greater than 450 MW occurred on August 21, 2025. Operational Information Active
Aug 21, 2025 3:22:48 PM ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from 08/21/2025 09:00 through 08/21/2025 17:00 due to a forced outage. Operational Information Cancelled
Aug 21, 2025 9:04:28 AM The DC_N (North) DC Tie will be unavailable from 08/21/2025 09:00 through 08/21/2025 17:00 due to a forced outage. Operational Information Active
Aug 21, 2025 8:46:07 AM The Daily RSASM for 08/21/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 21, 2025 12:38:09 AM No sudden loss of generation greater than 450 MW occurred on August 20, 2025. Operational Information Active
Aug 20, 2025 8:46:29 AM The Daily RSASM for 08/20/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 20, 2025 12:10:02 AM On August 19, 2025, a sudden loss of generation occurred at 05:24 totaling 538.6 MW. Frequency declined to 59.939 Hz, ERCOT load was 57,042 MW. Operational Information Active
Aug 19, 2025 8:46:40 AM The Daily RSASM for 08/19/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 19, 2025 12:05:34 AM No sudden loss of generation greater than 450 MW occurred on August 18, 2025. Operational Information Active
Aug 18, 2025 8:47:47 AM The Daily RSASM for 08/18/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 18, 2025 12:00:10 AM No sudden loss of generation greater than 450 MW occurred on August 17, 2025. Operational Information Active
Aug 17, 2025 8:46:33 AM The Daily RSASM for 08/17/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 17, 2025 12:01:06 AM No sudden loss of generation greater than 450 MW occurred on August 16, 2025. Operational Information Active
Aug 16, 2025 8:47:36 AM The Daily RSASM for 08/16/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 16, 2025 12:00:42 AM No sudden loss of generation greater than 450 MW occurred on August 15, 2025. Operational Information Active
Aug 15, 2025 8:46:51 AM The Daily RSASM for 08/15/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 15, 2025 12:55:13 AM No sudden loss of generation greater than 450 MW occurred on August 14, 2025. Operational Information Active
Aug 14, 2025 10:49:34 AM ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Aug 14, 2025 10:46:10 AM ERCOT has cancelled the following notice: At 10:30, ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Cancelled
Aug 14, 2025 10:37:18 AM ERCOT Emergency Base Points are Enabled Operational Information Active
Aug 14, 2025 10:30:01 AM At 10:30, ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Active
Aug 14, 2025 8:46:53 AM The Daily RSASM for 08/14/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 14, 2025 12:08:20 AM No sudden loss of generation greater than 450 MW occurred on August 13, 2025. Operational Information Active
Aug 13, 2025 11:38:36 AM Notification of Real-Time Market (RTM) prices under investigation. ERCOT is currently investigating Real-Time prices for SCED interval 07:40 on OD 08/12/2025. Should a price correction be warranted, a follow-up Market Notice will be issued with more details. The deadline for correcting prices before they become final is 08/14/2025 at 4PM for OD 08/12/2025. Alert Active
Aug 13, 2025 8:46:36 AM The Daily RSASM for 08/13/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 13, 2025 12:07:23 AM No sudden loss of generation greater than 450 MW occurred on August 12, 2025. Operational Information Active
Aug 12, 2025 8:46:43 AM The Daily RSASM for 08/12/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 12, 2025 12:41:03 AM No sudden loss of generation greater than 450 MW occurred on August 11, 2025. Operational Information Active
Aug 11, 2025 8:48:19 AM The Daily RSASM for 08/11/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 11, 2025 12:06:01 AM No sudden loss of generation greater than 450 MW occurred on August 10, 2025. Operational Information Active
Aug 10, 2025 8:46:40 AM The Daily RSASM for 08/10/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 10, 2025 7:19:15 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 06:53 for operating day 08/10/2025 This is for ECRS HE16-19 15MW, HE20 20MW, HE21 25MW, 22 HE22 10MW, HE23 5MW RRS HE21 15MW, HE22 5MW. Operational Information Cancelled
Aug 10, 2025 6:27:29 AM ERCOT will execute a SASM at 06:53 for operating day 08/10/2025 This is for ECRS HE16-19 15MW, HE20 20MW, HE21 25MW, 22 HE22 10MW, HE23 5MW RRS HE21 15MW, HE22 5MW. Operational Information Active
Aug 10, 2025 12:02:35 AM No sudden loss of generation greater than 450 MW occurred on August 9, 2025. Operational Information Active
Aug 9, 2025 8:46:41 AM The Daily RSASM for 08/09/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 9, 2025 12:03:00 AM No sudden loss of generation greater than 450 MW occurred on August 8, 2025. Operational Information Active
Aug 8, 2025 8:46:08 AM The Daily RSASM for 08/08/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 8, 2025 12:00:04 AM No sudden loss of generation greater than 450 MW occurred on August 7, 2025. Operational Information Active
Aug 7, 2025 2:11:38 PM DAM is complete. DRUC will begin at 1508. Operational Information Active
Aug 7, 2025 1:20:53 PM DAM Notice: ERCOT has postponed the deadline for the posting of the DAM solution for Operating Day 08/08/2025 due to long solution run time. Advisory Active
Aug 7, 2025 10:11:00 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
Aug 7, 2025 9:54:12 AM Notification of Real-Time Market (RTM) prices under investigation. ERCOT is currently investigating Real-Time prices for SCED intervals 00:00 - 13:40 on OD 08/06/2025. Should a price correction be warranted, a follow-up Market Notice will be issued with more details. The deadline for correcting prices before they become final is 08/08/2025 at 4PM for OD 08/06/2025. Alert Active
Aug 7, 2025 8:49:09 AM At 3:30 PM on 8/07/2025, 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
Aug 7, 2025 8:46:43 AM The Daily RSASM for 08/07/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 7, 2025 12:57:24 AM No sudden loss of generation greater than 450 MW occurred on August 6, 2025. Operational Information Active
Aug 6, 2025 3:44:59 PM ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Aug 6, 2025 8:46:32 AM The Daily RSASM for 08/06/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 6, 2025 12:00:12 AM On August 05, 2025, a sudden loss of generation occurred at 14:17 totaling 475 MW. Frequency declined to 59.953 Hz, ERCOT load was 79,017 MW. Operational Information Active
Aug 5, 2025 8:47:19 AM The Daily RSASM for 08/05/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 5, 2025 12:00:02 AM No sudden loss of generation greater than 450 MW occurred on August 4, 2025. Operational Information Active
Aug 4, 2025 8:47:09 AM The Daily RSASM for 08/04/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 4, 2025 12:02:57 AM No sudden loss of generation greater than 450 MW occurred on August 3, 2025. Operational Information Active
Aug 3, 2025 8:46:18 AM The Daily RSASM for 08/03/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 3, 2025 12:05:18 AM No sudden loss of generation greater than 450 MW occurred on August 2, 2025. Operational Information Active
Aug 2, 2025 8:46:33 AM The Daily RSASM for 08/02/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 2, 2025 12:04:00 AM On August 1, 2025, a sudden loss of generation occurred at 12:03 totaling 679 MW. Frequency declined to 59.954 Hz, ERCOT load was 73,946 MW. Operational Information Active
Aug 1, 2025 11:22:59 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 22:54 for operating day 08/02/25 this is for NSPIN HE02-13 98MW each hour. Operational Information Cancelled
Aug 1, 2025 10:30:15 PM ERCOT will execute a SASM at 22:54 for operating day 08/02/25 this is for NSPIN HE02-13 98MW each hour. Operational Information Active
Aug 1, 2025 6:31:11 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 17:56 for operating day 08/01/25 this is for ECRS HE21 10MW, HE24 49.5MW. REGUP HE22 21.70MW, HE23 4.5MW. NSPIN HE20 10.10MW. RRS HE22 28.3MW, HE23 45.10MW. Operational Information Cancelled
Aug 1, 2025 5:32:44 PM ERCOT will execute a SASM at 17:56 for operating day 08/01/25 this is for ECRS HE21 10MW, HE24 49.5MW. REGUP HE22 21.70MW, HE23 4.5MW. NSPIN HE20 10.10MW. RRS HE22 28.3MW, HE23 45.10MW. Operational Information Active
Aug 1, 2025 8:47:01 AM The Daily RSASM for 08/01/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Aug 1, 2025 12:19:55 AM No sudden loss of generation greater than 450 MW occurred on July 31, 2025. Operational Information Active