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Public Notices

This section contains public market notifications required by protocols as well as other market messages ERCOT may post for market transparency. ERCOT began archiving public notices November 3, 2011.

Aug 2024 Sep 2024 Oct 2024 Nov 2024 Dec 2024 Jan 2025
Date & Time Notice Type Status
Jan 20, 2025 8:47:17 AM The Daily RSASM for 01/20/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 20, 2025 12:04:53 AM No sudden loss of generation greater than 450 MW occurred on January 19, 2025. Operational Information Active
Jan 19, 2025 11:55:36 PM ERCOT has issued a Weather Watch from January 20-23 due to forecasted cold weather across the ERCOT region, higher electrical demand, and the potential for lower reserves. Grid conditions are expected to be normal and can be monitored on ercot.com. TXANS Active
Jan 19, 2025 12:00:03 PM ERCOT is issuing a [Watch] for Monday afternoon, January 20, 2025, through Wednesday morning, January 22, 2025, due to the increasing risk of freezing precipitation generally over a large area. Generally, East of Interstate 35, and South of Interstate 20 corridor within the ERCOT Region. If you experience any issues as a direct result of the weather event, notify ERCOT. Watch Active
Jan 19, 2025 8:46:46 AM The Daily RSASM for 01/19/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 19, 2025 5:04:29 AM ERCOT has cancelled the following notice: ERCOT is taking manual action for an unsolved contingency in the West region. Operational Information Cancelled
Jan 19, 2025 12:38:57 AM 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 AS Postings Active
Jan 19, 2025 12:36:59 AM No sudden loss of generation greater than 450 MW occurred on January 18, 2025. Operational Information Active
Jan 18, 2025 9:15:49 PM ERCOT is taking manual action for an unsolved contingency in the West region. Operational Information Active
Jan 18, 2025 8:46:24 AM The Daily RSASM for 01/18/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 18, 2025 12:03:08 AM On January 17, 2025, a sudden loss of generation occurred at 12:56 totaling 686 MW. Frequency declined to 59.934 Hz, ERCOT load was 53,247 MW. Operational Information Active
Jan 17, 2025 8:46:43 AM The Daily RSASM for 01/17/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 17, 2025 12:33:10 AM No sudden loss of generation greater than 450 MW occurred on January 16, 2025. Operational Information Active
Jan 16, 2025 7:03:03 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 18:45 for operating day 01/16/25 for HE21-24 and for operating day 01/17/25 for HE01-10 and HE12-17 for 19.2 MW RRS Operational Information Cancelled
Jan 16, 2025 6:08:57 PM ERCOT will execute a SASM at 18:45 for operating day 01/16/25 for HE21-24 and for operating day 01/17/25 for HE01-10 and HE12-17 for 19.2 MW RRS Operational Information Active
Jan 16, 2025 1:00:04 PM ERCOT is issuing a Watch for the extreme cold weather system approaching Sunday, January 19, 2025 through noon Thursday, January 23, 2025 with temperatures anticipated to remain below freezing. Watch Active
Jan 16, 2025 8:47:21 AM The Daily RSASM for 01/16/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 16, 2025 12:00:13 AM No sudden loss of generation greater than 450 MW occurred on January 15, 2025. Operational Information Active
Jan 15, 2025 5:20:31 PM Cancelled RUC commitment at timestamp [Jan 15,2025 HE-18:00] for [HAYSEN_2 and 3] for [Jan 15,2025 & HE-18:00] due to unintended commitment. Operational Instruction Active
Jan 15, 2025 1:16:19 PM ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from 01/15/2025 12:11 through 01/15/2025 13:00 due to a forced outage. Operational Information Cancelled
Jan 15, 2025 1:16:06 PM ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from 01/15/2025 12:55 through 01/15/2025 23:59 due to a forced outage. Operational Information Cancelled
Jan 15, 2025 12:56:23 PM The DC_N (North) DC Tie will be unavailable from 01/15/2025 12:55 through 01/15/2025 23:59 due to a forced outage. Operational Information Active
Jan 15, 2025 12:17:39 PM The DC_N (North) DC Tie will be unavailable from 01/15/2025 12:11 through 01/15/2025 13:00 due to a forced outage. Operational Information Active
Jan 15, 2025 11:00:15 AM ERCOT is issuing an Advisory for the extreme cold weather system approaching Sunday, January 19, 2025 through noon Thursday, January 23, 2025 with temperatures anticipated to remain below freezing. Advisory Active
Jan 15, 2025 8:46:24 AM The Daily RSASM for 01/15/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 15, 2025 8:20:41 AM At 08:19, All Non-Spin has been recalled. Operational Information Active
Jan 15, 2025 8:19:10 AM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2025-01-15 08:19:09, END_TIME: 2025-01-15 08:19:09, DURATION: 0 Hrs 0 Mins.; Operational Information
Jan 15, 2025 8:11:06 AM ERCOT ECRS HAS BEEN RECALLED Operational Information Cancelled
Jan 15, 2025 7:37:45 AM At 07:35 approximately 1167 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
Jan 15, 2025 7:35:27 AM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1167.3, BEGIN_TIME: 2025-01-15 07:35:27, END_TIME: 2025-01-15 23:59:00, DURATION: 16 Hrs 23 Mins.; Operational Information
Jan 15, 2025 7:06:18 AM ERCOT ECRS HAS BEEN DEPLOYED Operational Information Active
Jan 15, 2025 1:12:49 AM No sudden loss of generation greater than 450 MW occurred on January 14, 2025. Operational Information Active
Jan 14, 2025 8:46:49 AM The Daily RSASM for 01/14/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 14, 2025 12:18:14 AM No sudden loss of generation greater than 450 MW occurred on January 13, 2025. Operational Information Active
Jan 13, 2025 3:44:25 PM ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Jan 13, 2025 3:42:17 PM ERCOT Emergency Base Points are Enabled Operational Information Active
Jan 13, 2025 1:00:00 PM ERCOT is issuing an OCN for the predicted extreme cold weather event impacting the ERCOT Region starting noon, Sunday, January 19, 2025 through noon Wednesday, January 22, 2025. OCN Active
Jan 13, 2025 9:53:23 AM At 3:25 PM on 1/13/2025, 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
Jan 13, 2025 8:47:02 AM The Daily RSASM for 01/13/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 13, 2025 12:17:29 AM No sudden loss of generation greater than 450 MW occurred on January 12, 2025. Operational Information Active
Jan 12, 2025 8:45:48 AM The Daily RSASM for 01/12/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 12, 2025 12:05:01 AM No sudden loss of generation greater than 450 MW occurred on January 11, 2025. Operational Information Active
Jan 11, 2025 8:45:50 AM The Daily RSASM for 01/11/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 11, 2025 12:00:34 AM No sudden loss of generation greater than 450 MW occurred on January 10, 2025 Operational Information Active
Jan 10, 2025 8:01:08 PM ERCOT has cancelled the following notice: ERCOT is issuing a Watch for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. Watch Cancelled
Jan 10, 2025 8:00:13 PM ERCOT has cancelled the following notice: ERCOT is issuing a Advisory for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. Advisory Cancelled
Jan 10, 2025 8:00:03 PM ERCOT has cancelled the following notice: ERCOT is issuing a OCN for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. OCN Cancelled
Jan 10, 2025 3:00:32 PM ERCOT has cancelled the following notice: ERCOT is issuing an OCN for Wednesday, January 08, 2025 through Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region that is roughly North of a line of IH10. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. OCN Cancelled
Jan 10, 2025 3:00:23 PM ERCOT has cancelled the following notice: ERCOT is issuing an Advisory for Wednesday, January 08, 2025 through Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region that is roughly North of a line of IH-10. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. Advisory Cancelled
Jan 10, 2025 3:00:08 PM ERCOT has cancelled the following notice: ERCOT is issuing a Watch for Thursday, January 09, 2025 and Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. Watch Cancelled
Jan 10, 2025 8:46:06 AM The Daily RSASM for 01/10/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 10, 2025 12:00:03 AM No sudden loss of generation greater than 450 MW occurred on January 9, 2025 Operational Information Active
Jan 9, 2025 8:47:25 AM The Daily RSASM for 01/09/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 9, 2025 12:00:43 AM No sudden loss of generation greater than 450 MW occurred on January 8, 2025 Operational Information Active
Jan 8, 2025 5:00:02 PM ERCOT is issuing a Watch for Thursday, January 09, 2025 and Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. Watch Active
Jan 8, 2025 8:54:23 AM The Daily RSASM for 01/08/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 8, 2025 3:56:56 AM ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Jan 8, 2025 3:55:30 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
Jan 8, 2025 12:00:11 AM No sudden loss of generation greater than 450 MW occurred on January 7, 2025 Operational Information Active
Jan 7, 2025 4:01:02 PM ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Jan 7, 2025 10:00:05 AM ERCOT is issuing an Advisory for Wednesday, January 08, 2025 through Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region that is roughly North of a line of IH-10. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. Advisory Active
Jan 7, 2025 8:47:40 AM The Daily RSASM for 01/07/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 7, 2025 12:23:12 AM No sudden loss of generation greater than 450 MW occurred on January 6, 2025 Operational Information Active
Jan 6, 2025 11:31:49 AM ERCOT is issuing an OCN for Wednesday, January 08, 2025 through Friday, January 10, 2025 due to the possibility of Freezing precipitation over a large portion of the ERCOT Region that is roughly North of a line of IH10. If you experience any issues as a direct result of the weather event, notify ERCOT. QSEs representing FFSSRs begin preparation for potential FFSS deployment. OCN Active
Jan 6, 2025 8:50:41 AM The Daily RSASM for 01/06/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 6, 2025 8:12:12 AM ERCOT has issued a Weather Watch from January 6-10 due to forecasted cold weather across the ERCOT region, higher electrical demand, and the potential for lower reserves. Grid conditions are expected to be normal and can be monitored on ercot.com. TXANS Active
Jan 6, 2025 12:03:06 AM No sudden loss of generation greater than 450 MW occurred on January 5, 2025 Operational Information Active
Jan 5, 2025 8:04:16 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [1940] for operating day 01/06/2025 for RRS for HE 06 – HE 10, for HE06 for 8MW, for HE07 for 7.6 MW, for HE08 for 8.1MW, for HE 09 and HE 10 for 7.6MW Operational Information Cancelled
Jan 5, 2025 7:03:46 PM ERCOT will execute a SASM at [1940] for operating day 01/06/2025 for RRS for HE 06 – HE 10, for HE06 for 8MW, for HE07 for 7.6 MW, for HE08 for 8.1MW, for HE 09 and HE 10 for 7.6MW Operational Information Active
Jan 5, 2025 1:00:07 PM ERCOT is issuing a Watch for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. Watch Active
Jan 5, 2025 8:46:48 AM The Daily RSASM for 01/05/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 5, 2025 4:12:46 AM ERCOT has cancelled the following notice: ERCOT is taking manual action for an unsolved contingency in the West region. Operational Information Cancelled
Jan 5, 2025 12:02:02 AM No sudden loss of generation greater than 450 MW occurred on January 4, 2025 Operational Information Active
Jan 4, 2025 11:30:07 AM ERCOT is issuing a Advisory for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. Advisory Active
Jan 4, 2025 8:45:58 AM The Daily RSASM for 01/04/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 4, 2025 12:07:22 AM No sudden loss of generation greater than 450 MW occurred on January 3, 2025 Operational Information Active
Jan 3, 2025 9:49:00 PM ERCOT is taking manual action for an unsolved contingency in the West region. Operational Information Active
Jan 3, 2025 9:32:30 AM ERCOT has cancelled the following notice: The ESKOTA RAS has been taken out of service/removed from RTCA Operational Information Cancelled
Jan 3, 2025 9:30:22 AM ERCOT is issuing a OCN for the extreme cold weather system approaching the ERCOT Region with temperatures and windchills expected to be freezing from Monday, January 06, 2025 through Friday, January 10, 2025. OCN Active
Jan 3, 2025 9:27:34 AM The ESKOTA RAS has been taken out of service/removed from RTCA Operational Information Active
Jan 3, 2025 8:46:31 AM The Daily RSASM for 01/03/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 3, 2025 12:01:44 AM No sudden loss of generation greater than 450 MW occurred on January 2, 2025 Operational Information Active
Jan 2, 2025 8:47:29 AM The Daily RSASM for 01/02/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 2, 2025 12:02:01 AM No sudden loss of generation greater than 450 MW occurred on January 1, 2025 Operational Information Active
Jan 1, 2025 11:59:04 PM ERCOT has cancelled the following notice: Advisory issued for a geomagnetic disturbance of [K-8] until 1/1/25 23:59. Advisory Cancelled
Jan 1, 2025 12:17:05 PM ERCOT has cancelled the following notice: Advisory issued for a geomagnetic disturbance of [K-7] until 1/1/25 16:00. Advisory Cancelled
Jan 1, 2025 12:16:39 PM Advisory issued for a geomagnetic disturbance of [K-8] until 1/1/25 23:59. Advisory Active
Jan 1, 2025 12:03:46 PM ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 until 01/01/2025 at 10:00. Operational Information Cancelled
Jan 1, 2025 12:03:31 PM The Space Weather Prediction Center has extended the GMD Warning of K-8 until 01/01/2025 at 23:59. Operational Information Active
Jan 1, 2025 8:45:43 AM The Daily RSASM for 01/01/2025 will not be occurring due to zero participating QSEs. Operational Information Active
Jan 1, 2025 8:09:29 AM Advisory issued for a geomagnetic disturbance of [K-7] until 1/1/25 16:00. Advisory Active
Jan 1, 2025 8:00:05 AM The Space Weather Prediction Center has extended the GMD Warning of K-7 until 01/01/2025 at 16:00. Operational Information Active
Jan 1, 2025 5:44:08 AM The Space Weather Prediction Center has issued a GMD Warning of K-7 until 01/01/2025 at 10:00. Operational Information Active
Jan 1, 2025 12:05:05 AM No sudden loss of generation greater than 450 MW occurred on December 31, 2024. Operational Information Active