Public Notices

This section contains public market notifications required by protocols as well as other market messages ERCOT may post for market transparency. Notices are categorized by types and can be filtered by selecting the desired category. ERCOT began archiving public notices November 3, 2011.

May 2019 Jun 2019 Jul 2019 Aug 2019 Sep 2019 Oct 2019
Date Message Type Status
Oct 15 2019 16:42:39 CST ERCOT has cancelled the following notice: The Laredo VFT DC Tie will be unavailable from 06:30 10/15/2019 through 17:00 10/15/2019 due to a planned outage. Operational Information Cancelled
Oct 15 2019 13:56:19 CST ERCOT is bypassing the GAUSS Series Capacitor for SSR mitigation. Operational Information Active
Oct 15 2019 12:21:30 CST The Railroad DC Tie will be unavailable on 10/17/2019 from 10:00 until 16:00 due to a planned outage. Operational Information Active
Oct 15 2019 08:52:28 CST The Daily RSASM for Tuesday October 15, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 15 2019 00:00:24 CST On 10/14/2019 a sudden loss of generation occurred at 15:31 totaling 576 MW. Frequency declined to 59.896 Hz, ERCOT load was 49, 447 MW. Operational Information Active
Oct 14 2019 15:35:34 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Oct 14 2019 15:31:42 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Oct 14 2019 12:19:48 CST The Railroad DC Tie will be unavailable on 10/18/2019 from 10:00 until 16:00 due to a planned outage. Operational Information Active
Oct 14 2019 09:17:54 CST ERCOT has cancelled the following notice: Monticello SES (MNSES) to Welsh (WLSH) 345kV circuit DC_E starting on Monday 10/14/19 at 08:00 until Friday 10/18/19 at 16:00 for E_HVDC maintenance outage. Operational Information Cancelled
Oct 14 2019 08:49:13 CST The Daily RSASM for Monday October 14, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 14 2019 07:18:37 CST Monticello SES (MNSES) to Welsh (WLSH) 345kV circuit DC_E starting on Monday 10/14/19 at 08:00 until Friday 10/18/19 at 16:00 for E_HVDC maintenance outage. Operational Information Active
Oct 14 2019 07:17:48 CST DC Tie Outage: The East DC Tie will be unavailable from 07:15 10/14/2019 through 17:00 10/18/2019 due to a planned outage. Operational Information Active
Oct 14 2019 00:49:41 CST No sudden loss of generation greater than 450 MW occurred on October 13, 2019 Operational Information Active
Oct 13 2019 08:48:28 CST The Daily RSASM for Saturday, October 12, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 13 2019 00:00:08 CST No sudden loss of generation greater than 450 MW occurred on October 12, 2019 Operational Information Active
Oct 12 2019 08:47:28 CST The Daily RSASM for Saturday, October 12, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 12 2019 00:20:15 CST No sudden loss of generation greater than 450 MW occurred on October 11, 2019 Operational Information Active
Oct 11 2019 08:49:01 CST The Daily RSASM for Friday, October 11, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 11 2019 04:16:47 CST 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
Oct 11 2019 04:16:09 CST ERCOT will be working from the Primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Oct 11 2019 01:05:44 CST No sudden loss of generation greater than 450 MW occurred on October 10, 2019. Operational Information Active
Oct 10 2019 16:14:11 CST ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Oct 10 2019 08:48:21 CST The Daily RSASM for Thursday, October 10, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 10 2019 00:17:12 CST No sudden loss of generation greater than 450 MW occurred on October 9, 2019 Operational Information Active
Oct 09 2019 11:28:27 CST DC Tie Outage: The Laredo VFT DC Tie will be unavailable from 06:30 10/15/2019 through 17:00 10/15/2019 due to a planned outage. Operational Information Active
Oct 09 2019 08:46:15 CST The Daily RSASM for Wednesday, October 9, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 09 2019 00:04:21 CST No sudden loss of generation greater than 450 MW occurred on October 8, 2019 Operational Information Active
Oct 08 2019 08:46:13 CST The Daily RSASM for Tuesday, October 8, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 08 2019 01:01:44 CST No sudden loss of generation greater than 450 MW occurred on October 7, 2019 Operational Information Active
Oct 07 2019 15:11:25 CST ERCOT has cancelled the following notice: On 10/6/2019 a sudden loss of generation occurred at 14:50 totaling 666 MW. Frequency declined to 59.945 Hz, ERCOT load was 61, 618 MW. Operational Information Cancelled
Oct 07 2019 15:11:03 CST CORRECTION: On 10/6/2019 a sudden loss of generation occurred at 14:50 totaling 866 MW. Frequency declined to 59.945 Hz, ERCOT load was 61, 618 MW. Operational Information Active
Oct 07 2019 11:30:18 CST Notification of Market Price Correction: Market price correction for SCED. ERCOT has identified a need to perform price correction for SCED Interval 0:40:16 on OD 10/6/2019, which impacts Real-Time Market 15-min Settlement Intervals from Interval Ending 0:45 to Interval Ending 1:00. The incorrect prices were caused by an incorrect max shadow price on one of the transmission constraints, due to a software error. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 4 P.M. of 10/8/2019, Tuesday. Alert Active
Oct 07 2019 08:46:26 CST The Daily RSASM for Monday, October 7, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 07 2019 04:34:07 CST ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Oct 07 2019 00:15:50 CST On 10/6/2019 a sudden loss of generation occurred at 14:50 totaling 666 MW. Frequency declined to 59.945 Hz, ERCOT load was 61, 618 MW. Operational Information Active
Oct 06 2019 16:05:45 CST ERCOT has cancelled the following notice: The Railroad 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
Oct 06 2019 16:05:38 CST ERCOT has cancelled the following notice: The Railroad DC Tie will be unavailable from 14:50 10/06/2019 through 23:59 10/06/2019 due to a forced outage. Operational Information Cancelled
Oct 06 2019 15:21:03 CST DC Tie Outage: The Railroad DC Tie will be unavailable from 14:50 10/06/2019 through 23:59 10/06/2019 due to a forced outage. Operational Information Active
Oct 06 2019 15:02:05 CST DC Tie Curtailment Notice: The Railroad 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
Oct 06 2019 08:46:13 CST The Daily RSASM for Sunday, October 6, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 06 2019 00:06:37 CST No sudden loss of generation greater than 450 MW occurred on October 5, 2019 Operational Information Active
Oct 05 2019 17:05:29 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2019-10-05 17:05:29, END_TIME: 2019-10-05 17:05:29, DURATION: 0 Hrs 0 Mins.; Market Message
Oct 05 2019 17:00:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 305.0, BEGIN_TIME: 2019-10-05 17:00:01, END_TIME: 2019-10-05 23:00:00, DURATION: 5 Hrs 59 Mins.; Market Message
Oct 05 2019 16:00:02 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 305.0, BEGIN_TIME: 2019-10-05 16:00:01, END_TIME: 2019-10-05 23:00:00, DURATION: 6 Hrs 59 Mins.; Market Message
Oct 05 2019 15:52:35 CST CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 298.5, BEGIN_TIME: 2019-10-05 15:52:34, END_TIME: 2019-10-05 23:00:00, DURATION: 7 Hrs 7 Mins.; Market Message
Oct 05 2019 08:48:15 CST The Daily RSASM for Saturday, October 5, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 05 2019 04:19:14 CST ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Oct 05 2019 00:31:45 CST ERCOT has cancelled the following notice: At 3:25 PM on 09/30/2019, 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
Oct 05 2019 00:05:51 CST No sudden loss of generation greater than 450 MW occurred on October 4, 2019 Operational Information Active
Oct 04 2019 18:13:47 CST ERCOT has cancelled the following notice: The GAUSS Series capacitor was bypassed for a planned transmission outage. Operational Information Cancelled
Oct 04 2019 08:47:43 CST The Daily RSASM for Friday, October 4, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 04 2019 00:39:12 CST No sudden loss of generation greater than 450 MW occurred on October 3, 2019 Operational Information Active
Oct 03 2019 17:54:28 CST ERCOT has cancelled the following notice: ERCOT has issued an OCN for Extreme Hot Weather with forecasted temperatures to be above 94°F in the North Central and South Central weather zones, from Oct.1, through Oct. 3 2019 . Operational Information Cancelled
Oct 03 2019 08:46:15 CST The Daily RSASM for Thursday, October 3, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 03 2019 00:19:37 CST No sudden loss of generation greater than 450 MW occurred on October 2, 2019 Operational Information Active
Oct 02 2019 12:55:10 CST ERCOT has cancelled the following notice: The DC_L DC Tie will be unavailable from 05:09 10/02/2019 through 23:59 10/02/2019 due to a forced outage. Operational Information Cancelled
Oct 02 2019 12:54:26 CST ERCOT has cancelled the following notice: The DC_L 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
Oct 02 2019 08:47:08 CST The Daily RSASM for Wednesday, October 02, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Oct 02 2019 05:13:06 CST DC Tie Outage: The DC_L DC Tie will be unavailable from 05:09 10/02/2019 through 23:59 10/02/2019 due to a forced outage. Operational Information Active
Oct 02 2019 05:09:55 CST DC Tie Curtailment Notice: The DC_L 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
Oct 02 2019 01:44:26 CST No sudden loss of generation greater than 450 MW occurred on October 1, 2019. Operational Information Active
Oct 01 2019 08:47:11 CST The Daily RSASM for Tuesday, October 01, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Oct 01 2019 00:31:05 CST No sudden loss of generation greater than 450 MW occurred on September 30, 2019. Operational Information Active