| Dec 13, 2025 12:14:53 AM |
No sudden loss of generation greater than 450 MW occurred on December 12, 2025.
|
Operational Information |
Active |
| Dec 12, 2025 3:54:09 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 |
| Dec 12, 2025 3:53:47 AM |
ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor.
|
Operational Information |
Active |
| Dec 12, 2025 12:05:25 AM |
No sudden loss of generation greater than 450 MW occurred on December 11, 2025.
|
Operational Information |
Active |
| Dec 11, 2025 5:31:29 PM |
At 17:30, All Non-Spin has been recalled.
|
Operational Information |
Active |
| Dec 11, 2025 4:35:12 PM |
At 16:34 approximately 1513 MW of Non-Spin has been deployed, anticipated duration is 2359.
|
Operational Information |
Active |
| Dec 11, 2025 4:04:19 PM |
ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop.
|
Operational Information |
Active |
| Dec 11, 2025 12:00:10 AM |
No sudden loss of generation greater than 450 MW occurred on December 10, 2025.
|
Operational Information |
Active |
| Dec 10, 2025 1:57:46 PM |
Notification of Real-Time Market (RTM) prices under investigation. ERCOT is currently investigating Real-Time prices between Operating Days (ODs) December 5-10, 2025. A software defect was discovered to have affected RTM results during these ODs and has been fixed in an emergency deployment on the morning of December 10. Should a price correction be warranted, a follow-up Market Notice will be issued with more details.
|
Alert |
Active |
| Dec 10, 2025 12:30:22 AM |
No sudden loss of generation greater than 450 MW occurred on December 9, 2025.
|
Operational Information |
Active |
| Dec 9, 2025 10:11:28 AM |
Notification of Day-Ahead Market (DAM) price correction. ERCOT has identified a software defect that affected DAM results for Operating Day (OD) December 6, 2025. The defect has been fixed in an emergency release, and subsequent DAM ODs have been unaffected. ERCOT performed an analysis and determined that the impact to prices met significance criteria, and corrected prices for OD December 6 before the deadline of December 8 at 10AM. The price correction files have been posted on the Market Information System (MIS).
|
Alert |
Active |
| Dec 9, 2025 12:00:07 AM |
No sudden loss of generation greater than 450 MW occurred on December 8, 2025.
|
Operational Information |
Active |
| Dec 8, 2025 5:56:07 PM |
At 17:55, All Non-Spin has been recalled.
|
Operational Information |
Active |
| Dec 8, 2025 5:45:22 PM |
At 17:43, 640.5 MW Non-Spin has been recalled.
|
Operational Information |
Active |
| Dec 8, 2025 5:01:04 PM |
At 16:59 approximately 1281 MW of Non-Spin has been deployed, anticipated duration is 2359.
|
Operational Information |
Active |
| Dec 8, 2025 12:00:49 AM |
No sudden loss of generation greater than 450 MW occurred on December 7, 2025.
|
Operational Information |
Active |
| Dec 7, 2025 3:20:34 PM |
The issue with the DAM Shift Factors report has been resolved for Operating Day 12/08/2025.
|
Operational Information |
Active |
| Dec 7, 2025 12:54:07 PM |
ERCOT has discovered an issue with the following MIS postings for Operating Day 12/08/2025: DAM Shift Factors. These issues are currently under investigation. A notice will be sent out once the issue has been resolved.
|
Operational Information |
Active |
| Dec 7, 2025 12:01:09 AM |
No sudden loss of generation greater than 450 MW occurred on December 6, 2025.
|
Operational Information |
Active |
| Dec 6, 2025 6:15:39 PM |
At 18:14, All Non-Spin has been recalled.
|
Operational Information |
Active |
| Dec 6, 2025 5:57:46 PM |
At 17:51, 740 MW of Non - Spin has been recalled, the remaining amount is 675.6 MW
|
Operational Information |
Active |
| Dec 6, 2025 4:44:49 PM |
At 16:43 approximately 1385 MW of Non-Spin has been deployed, anticipated duration is 23:59.
|
Operational Information |
Active |
| Dec 6, 2025 3:30:22 PM |
The issue with the DAM Shift Factors report has been resolved for Operating Day 12/07/2025.
|
Operational Information |
Active |
| Dec 6, 2025 1:41:42 PM |
ERCOT has discovered an issue with the following MIS postings for Operating Day 12/07/2025: DAM Shift Factors. These issues are currently under investigation. A notice will be sent out once the issue has been resolved.
|
Operational Information |
Active |
| Dec 6, 2025 12:02:50 AM |
On December 5, 2025, a sudden loss of generation occurred at 06:15 totaling 582 MW. Frequency declined to 59.953 Hz, ERCOT load was 56,014 MW.
|
Operational Information |
Active |
| Dec 5, 2025 1:53:19 AM |
At 01:53, The RTC+B cutover is complete and ERCOT is operating on RTC+B Energy & Market Management Systems.
|
Operational Information |
Active |
| Dec 5, 2025 12:02:29 AM |
No sudden loss of generation greater than 450 MW occurred on December 4, 2025.
|
Operational Information |
Active |
| Dec 4, 2025 11:27:09 PM |
At 23:56, ERCOT plans to perform a cutover of its Energy & Market Management Systems to RTC+B systems.
|
Operational Information |
Active |
| Dec 4, 2025 8:47:50 AM |
The Daily RSASM for 12/04/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Dec 4, 2025 12:02:49 AM |
On December 3, 2025, a sudden loss of generation occurred at 09:01 totaling 510 MW. Frequency declined to 59.975 Hz, ERCOT load was 56,470 MW.
|
Operational Information |
Active |
| Dec 3, 2025 8:00:14 PM |
ERCOT has cancelled the following notice: Advisory issued for a geomagnetic disturbance of K-7 until 20:00 12/03/2025
|
Operational Information |
Cancelled |
| Dec 3, 2025 8:00:05 PM |
ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 or Greater until 12/03/2025 20:00.
|
Operational Information |
Cancelled |
| Dec 3, 2025 3:05:35 PM |
Advisory issued for a geomagnetic disturbance of K-7 until 20:00 12/03/2025
|
Operational Information |
Active |
| Dec 3, 2025 2:43:05 PM |
The Space Weather Prediction Center has issued a GMD Warning of K-7 or Greater until 12/03/2025 20:00.
|
Operational Information |
Active |
| Dec 3, 2025 9:41:04 AM |
ERCOT has cancelled the following notice: ERCOT is taking manual action for an unsolved contingency in the West Texas region.
|
Operational Information |
Cancelled |
| Dec 3, 2025 8:45:29 AM |
The Daily RSASM for 12/03/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Dec 3, 2025 12:10:21 AM |
No sudden loss of generation greater than 450 MW occurred on December 2, 2025.
|
Operational Information |
Active |
| Dec 2, 2025 8:39:24 PM |
ERCOT is taking manual action for an unsolved contingency in the West Texas region.
|
Operational Information |
Active |
| Dec 2, 2025 8:45:22 AM |
The Daily RSASM for 12/02/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Dec 2, 2025 12:20:38 AM |
No sudden loss of generation greater than 450 MW occurred on December 1, 2025.
|
Operational Information |
Active |
| Dec 1, 2025 9:48:41 AM |
ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie has been derated to 170MW Import/Export due to equipment issues until further notice.
|
Operational Information |
Cancelled |
| Dec 1, 2025 8:46:15 AM |
The Daily RSASM for 12/01/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Dec 1, 2025 12:01:01 AM |
No sudden loss of generation greater than 450 MW occurred on November 30, 2025.
|
Operational Information |
Active |
