| Sep 30, 2025 11:51:30 AM |
GMD Alert for a K-7 on 09/30/2025 ended at 07:00.
|
Alert |
Active |
| Sep 30, 2025 8:46:33 AM |
The Daily RSASM for 09/30/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 30, 2025 12:49:05 AM |
The Space Weather Prediction Center has issued a GMD Alert for a K-7 on 09/30/2025 at 00:25.
|
Operational Information |
Active |
| Sep 30, 2025 12:31:04 AM |
No sudden loss of generation greater than 450 MW occurred on September 29, 2025.
|
Operational Information |
Active |
| Sep 30, 2025 12:10:14 AM |
The Space Weather Prediction Center has issued a GMD Warning of K-7 or Greater until 09/30/2025 at 07:00.
|
Operational Information |
Active |
| Sep 29, 2025 11:35:12 AM |
ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from
09/29/2025 11:00 through 09/29/2025 11:30 due to a forced outage.
|
Operational Information |
Cancelled |
| Sep 29, 2025 11:00:49 AM |
The DC_E (East) DC Tie will be unavailable from
09/29/2025 11:00 through 09/29/2025 11:30 due to a forced outage.
|
Operational Information |
Active |
| Sep 29, 2025 8:46:23 AM |
The Daily RSASM for 09/29/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 29, 2025 12:00:50 AM |
No sudden loss of generation greater than 450 MW occurred on September 28, 2025.
|
Operational Information |
Active |
| Sep 28, 2025 8:46:33 AM |
The Daily RSASM for 09/28/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 28, 2025 12:00:04 AM |
No sudden loss of generation greater than 450 MW occurred on September 27, 2025.
|
Operational Information |
Active |
| Sep 27, 2025 8:46:50 AM |
The Daily RSASM for 09/27/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 27, 2025 8:44:34 AM |
The DC_L (Laredo VFT) DC Tie will be unavailable from
09/29/2025 07:00 through 10/03/2025 16:00 due to a planned outage.
|
Operational Information |
Active |
| Sep 27, 2025 12:03:07 AM |
No sudden loss of generation greater than 450 MW occurred on September 26, 2025.
|
Operational Information |
Active |
| Sep 26, 2025 7:23:56 PM |
At 19:22, All Non-Spin has been recalled.
|
Operational Information |
Active |
| Sep 26, 2025 7:22:58 PM |
CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2025-09-26 19:22:58, END_TIME: 2025-09-26 19:22:58, DURATION: 0 Hrs 0 Mins.;
|
Operational Information |
|
| Sep 26, 2025 6:35:32 PM |
At 18:34 approximately 1408 MW of Non-Spin has been deployed, anticipated duration is 23:59.
|
Operational Information |
Active |
| Sep 26, 2025 6:34:16 PM |
CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1408.9, BEGIN_TIME: 2025-09-26 18:34:15, END_TIME: 2025-09-26 23:59:01, DURATION: 5 Hrs 24 Mins.;
|
Operational Information |
|
| Sep 26, 2025 8:46:35 AM |
The Daily RSASM for 09/26/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 26, 2025 8:29:27 AM |
ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from
09/26/2025 07:30 through 09/26/2025 12:00 due to a forced outage.
|
Operational Information |
Cancelled |
| Sep 26, 2025 7:31:21 AM |
The DC_E (East) DC Tie will be unavailable from
09/26/2025 07:30 through 09/26/2025 12:00 due to a forced outage.
|
Operational Information |
Active |
| Sep 26, 2025 12:07:49 AM |
No sudden loss of generation greater than 450 MW occurred on September 25, 2025.
|
Operational Information |
Active |
| Sep 25, 2025 8:46:47 AM |
The Daily RSASM for 09/25/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 25, 2025 6:00:11 AM |
ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from
11/04/2024 14:17 through 09/26/2025 16:00 due to a forced outage.
|
Operational Information |
Cancelled |
| Sep 25, 2025 12:00:50 AM |
On SEPT 24, 2025, a sudden loss of generation occurred at 18:30 totaling 1211 MW. Frequency declined to 59.905 Hz, ERCOT load was 72,627 MW.
|
Operational Information |
Active |
| Sep 24, 2025 11:12:56 AM |
Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of 09/24/2025 is available.
|
Operational Instruction |
Active |
| Sep 24, 2025 8:46:07 AM |
The Daily RSASM for 09/24/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 24, 2025 12:05:51 AM |
On Sept 23,2025, a sudden loss of generation occurred at 22:19 totaling 559 MW. Frequency declined to 59.947 Hz, ERCOT load was 70,136 MW.
|
Operational Information |
Active |
| Sep 23, 2025 9:29:07 AM |
ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a 345 KV outage in the West Texas area.
|
Operational Information |
Cancelled |
| Sep 23, 2025 8:46:19 AM |
The Daily RSASM for 09/23/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 23, 2025 8:41:59 AM |
ERCOT is taking manual actions to pre-posture for a 345 KV outage in the West Texas area.
|
Operational Information |
Active |
| Sep 23, 2025 12:04:59 AM |
No sudden loss of generation greater than 450 MW occurred on September 22, 2025.
|
Operational Information |
Active |
| Sep 22, 2025 9:11:16 AM |
ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a 345 KV outage in the West Texas area.
|
Operational Information |
Cancelled |
| Sep 22, 2025 8:46:20 AM |
The Daily RSASM for 09/22/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 22, 2025 8:42:37 AM |
ERCOT is taking manual actions to pre-posture for a 345 KV outage in the West Texas area.
|
Operational Information |
Active |
| Sep 22, 2025 12:01:00 AM |
On September 21, 2025, a sudden loss of generation occurred at 16:14 totaling 557 MW. Frequency declined to 59.944 Hz, ERCOT load was 77,225 MW.
|
Operational Information |
Active |
| Sep 21, 2025 8:46:21 AM |
The Daily RSASM for 09/21/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 21, 2025 1:03:41 AM |
No sudden loss of generation greater than 450 MW occurred on September 20, 2025.
|
Operational Information |
Active |
| Sep 20, 2025 8:45:57 AM |
The Daily RSASM for 09/20/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 20, 2025 12:15:07 AM |
No sudden loss of generation greater than 450 MW occurred on September 19, 2025.
|
Operational Information |
Active |
| Sep 19, 2025 8:46:28 AM |
The Daily RSASM for 09/19/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 19, 2025 8:00:26 AM |
ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from
09/18/2025 16:00 through 09/19/2025 08:00 due to a forced outage.
|
Operational Information |
Cancelled |
| Sep 19, 2025 12:00:15 AM |
No sudden loss of generation greater than 450 MW occurred on September 18, 2025.
|
Operational Information |
Active |
| Sep 18, 2025 3:56:05 PM |
The DC_N (North) DC Tie will be unavailable from
09/18/2025 16:00 through 09/19/2025 08:00 due to a forced outage.
|
Operational Information |
Active |
| Sep 18, 2025 9:32:29 AM |
ERCOT has cancelled the following notice: The DC_N (North) DC Tie will be unavailable from
09/17/2025 19:00 through 09/18/2025 12:00 due to a forced outage.
|
Operational Information |
Cancelled |
| Sep 18, 2025 8:46:41 AM |
The Daily RSASM for 09/18/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 18, 2025 12:07:35 AM |
No sudden loss of generation greater than 450 MW occurred on September 17, 2025.
|
Operational Information |
Active |
| Sep 17, 2025 7:02:16 PM |
The DC_N (North) DC Tie will be unavailable from
09/17/2025 19:00 through 09/18/2025 12:00 due to a forced outage.
|
Operational Information |
Active |
| Sep 17, 2025 8:47:05 AM |
The Daily RSASM for 09/17/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 17, 2025 2:39:16 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 |
| Sep 17, 2025 12:00:03 AM |
No sudden loss of generation greater than 450 MW occurred on September 16, 2025.
|
Operational Information |
Active |
| Sep 16, 2025 11:51:02 PM |
ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a 345 KV outage in the coastal area.
|
Operational Information |
Cancelled |
| Sep 16, 2025 10:31:03 PM |
ERCOT is taking manual actions to pre-posture for a 345 KV outage in the coastal area.
|
Operational Information |
Active |
| Sep 16, 2025 8:46:52 AM |
The Daily RSASM for 09/16/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 16, 2025 12:00:03 AM |
No sudden loss of generation greater than 450 MW occurred on September 15, 2025.
|
Operational Information |
Active |
| Sep 15, 2025 8:46:49 AM |
The Daily RSASM for 09/15/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 15, 2025 4:00:11 AM |
ERCOT has cancelled the following notice: The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater or G3 and greater until September 15, 2025, 0900 UTC.
|
Operational Information |
Cancelled |
| Sep 15, 2025 12:03:25 AM |
On September 14, 2025, a sudden loss of generation occurred at 20:21 totaling 1202 MW. Frequency declined to 59.907 Hz, ERCOT load was 69,455 MW.
|
Operational Information |
Active |
| Sep 14, 2025 10:19:10 PM |
The Space Weather Prediction Center has issued a GMD Warning of K-7 or greater or G3 and greater until September 15, 2025, 0900 UTC.
|
Operational Information |
Active |
| Sep 14, 2025 8:47:05 AM |
The Daily RSASM for 09/14/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 14, 2025 12:02:27 AM |
No sudden loss of generation greater than 450 MW occurred on September 13, 2025.
|
Operational Information |
Active |
| Sep 13, 2025 2:12:24 PM |
ERCOT has cancelled the following notice: ERCOT will execute a SASM at [13:50] for operating day [09/13/2025] for:
RRS – 4.8 MW HE 17, 5.1 MW HE 18, 5.6 MW HE 19, 5.2 MW HE 20
ECRS – 24 MW HE 17 - 20
|
Operational Information |
Cancelled |
| Sep 13, 2025 1:13:42 PM |
ERCOT will execute a SASM at [13:50] for operating day [09/13/2025] for:
RRS – 4.8 MW HE 17, 5.1 MW HE 18, 5.6 MW HE 19, 5.2 MW HE 20
ECRS – 24 MW HE 17 - 20
|
Operational Information |
Active |
| Sep 13, 2025 8:47:04 AM |
The Daily RSASM for 09/13/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 13, 2025 5:21:40 AM |
ERCOT has cancelled the following notice: ERCOT will execute a SASM at [04:50] for operating day [09/13/2025] for:
RRS – 20 MW HE 20, 26.2 MW HE 21
NONSPIN – 2 MW HE 22
ECRS – 32.1 MW HE 21
REGDN – 34 MW HE 8 - 9, 19.5 MW HE 10, 34 MW HE 11, 87 MW HE 22 – 23, 32.6 MW HE 24
REGUP – 70.6 MW HE 9, 68.6 MW HE 10, 87 MW HE 18, 7.7 MW HE 20
|
Operational Information |
Cancelled |
| Sep 13, 2025 4:17:24 AM |
ERCOT will execute a SASM at [04:50] for operating day [09/13/2025] for:
RRS – 20 MW HE 20, 26.2 MW HE 21
NONSPIN – 2 MW HE 22
ECRS – 32.1 MW HE 21
REGDN – 34 MW HE 8 - 9, 19.5 MW HE 10, 34 MW HE 11, 87 MW HE 22 – 23, 32.6 MW HE 24
REGUP – 70.6 MW HE 9, 68.6 MW HE 10, 87 MW HE 18, 7.7 MW HE 20
|
Operational Information |
Active |
| Sep 13, 2025 12:02:57 AM |
No sudden loss of generation greater than 450 MW occurred on September 12, 2025.
|
Operational Information |
Active |
| Sep 12, 2025 8:56:33 AM |
The Daily RSASM for 09/12/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 12, 2025 3:44:16 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 |
| Sep 12, 2025 3:43:03 AM |
ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor.
|
Operational Information |
Active |
| Sep 12, 2025 12:01:10 AM |
On September 11, 2025, a sudden loss of generation occurred at 15:33 totaling 735 MW. Frequency declined to 59.942 Hz, ERCOT load was 78,300 MW.
|
Operational Information |
Active |
| Sep 11, 2025 3:51:11 PM |
ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop.
|
Operational Information |
Active |
| Sep 11, 2025 12:36:15 PM |
At 12:35, ERCOT ended the RTC+B closed loop test and is currently operating back on Production Energy & Market Management Systems.
|
Operational Information |
Active |
| Sep 11, 2025 12:00:18 PM |
At 12:35, ERCOT plans to end the RTC+B closed loop test and cutover its Energy & Market Management Systems back to Production systems.
|
Operational Information |
Active |
| Sep 11, 2025 10:38:49 AM |
At 10:35, ERCOT initiated a RTC+B closed loop test and is currently operating on RTC+B Energy & Market Management Systems.
|
Operational Information |
Active |
| Sep 11, 2025 10:00:09 AM |
At 10:35, ERCOT plans to perform a RTC+B closed loop test and cutover of its Energy & Market Management Systems to RTC+B systems.
|
Operational Information |
Active |
| Sep 11, 2025 8:47:26 AM |
The Daily RSASM for 09/11/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 11, 2025 12:00:33 AM |
No sudden loss of generation greater than 450 MW occurred on September 10, 2025.
|
Operational Information |
Active |
| Sep 10, 2025 8:46:31 AM |
The Daily RSASM for 09/10/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 10, 2025 2:00:57 AM |
ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:35 for operating day 9/10/25 this is for ECRS HE13 28.5MW HE17 26.9MW NONSPIN HE13 10.6MW HE14 7MW RRS HE8 35.3MW HE10 56MW HE12 56MW.
|
Operational Information |
Cancelled |
| Sep 10, 2025 1:09:03 AM |
ERCOT will execute a SASM at 01:35 for operating day 9/10/25 this is for ECRS HE13 28.5MW HE17 26.9MW NONSPIN HE13 10.6MW HE14 7MW RRS HE8 35.3MW HE10 56MW HE12 56MW.
|
Operational Information |
Active |
| Sep 10, 2025 12:05:13 AM |
No sudden loss of generation greater than 450 MW occurred on September 9, 2025.
|
Operational Information |
Active |
| Sep 9, 2025 8:46:35 AM |
The Daily RSASM for 09/09/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 9, 2025 12:09:26 AM |
No sudden loss of generation greater than 450 MW occurred on September 8, 2025.
|
Operational Information |
Active |
| Sep 8, 2025 8:46:12 AM |
The Daily RSASM for 09/08/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 8, 2025 12:00:39 AM |
No sudden loss of generation greater than 450 MW occurred on September 7, 2025.
|
Operational Information |
Active |
| Sep 7, 2025 8:46:08 AM |
The Daily RSASM for 09/07/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 7, 2025 12:01:41 AM |
No sudden loss of generation greater than 450 MW occurred on September 6, 2025.
|
Operational Information |
Active |
| Sep 6, 2025 8:46:15 AM |
The Daily RSASM for 09/06/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 6, 2025 12:01:47 AM |
No sudden loss of generation greater than 450 MW occurred on September 5, 2025.
|
Operational Information |
Active |
| Sep 5, 2025 8:54:29 AM |
ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a planned outage in the Del Rio region.
|
Operational Information |
Cancelled |
| Sep 5, 2025 8:46:28 AM |
The Daily RSASM for 09/05/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 5, 2025 7:59:43 AM |
ERCOT is taking manual actions to pre-posture for a planned outage in the Del Rio region.
|
Operational Information |
Active |
| Sep 5, 2025 12:03:20 AM |
No sudden loss of generation greater than 450 MW occurred on September 4, 2025.
|
Operational Information |
Active |
| Sep 4, 2025 8:21:28 PM |
At 20:20, All Non-Spin has been recalled.
|
Operational Information |
Active |
| Sep 4, 2025 8:20:00 PM |
CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2025-09-04 20:20:00, END_TIME: 2025-09-04 20:20:00, DURATION: 0 Hrs 0 Mins.;
|
Operational Information |
|
| Sep 4, 2025 7:33:01 PM |
CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 1031.1, BEGIN_TIME: 2025-09-04 20:00:00, END_TIME: 2025-09-04 23:59:01, DURATION: 3 Hrs 59 Mins.;
|
Operational Information |
|
| Sep 4, 2025 6:51:42 PM |
At 18:50 approximately 965.2 MW of Non-Spin has been deployed, anticipated duration is 23:59:01.
|
Operational Information |
Active |
| Sep 4, 2025 6:50:14 PM |
CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 965.2, BEGIN_TIME: 2025-09-04 18:50:13, END_TIME: 2025-09-04 23:59:01, DURATION: 5 Hrs 8 Mins.;
|
Operational Information |
|
| Sep 4, 2025 3:51:03 PM |
ERCOT Emergency Base Points are Disabled
|
Operational Information |
Cancelled |
| Sep 4, 2025 3:42:23 PM |
ERCOT Emergency Base Points are Enabled
|
Operational Information |
Active |
| Sep 4, 2025 11:41:47 AM |
At 3:30 PM on 9/04/2025, 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 |
| Sep 4, 2025 8:46:17 AM |
The Daily RSASM for 09/04/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 4, 2025 12:20:53 AM |
No sudden loss of generation greater than 450 MW occurred on September 3, 2025.
|
Operational Information |
Active |
| Sep 3, 2025 4:22:53 PM |
Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of 09/03/2025 is available.
|
Operational Instruction |
Active |
| Sep 3, 2025 9:58:57 AM |
The DC_E (East) DC Tie will be unavailable from
11/04/2024 14:17 through 09/26/2025 16:00 due to a forced outage.
|
Operational Information |
Active |
| Sep 3, 2025 8:46:51 AM |
The Daily RSASM for 09/03/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 3, 2025 12:16:42 AM |
No sudden loss of generation greater than 450 MW occurred on September 2, 2025.
|
Operational Information |
Active |
| Sep 2, 2025 8:46:22 AM |
The Daily RSASM for 09/02/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 2, 2025 12:07:47 AM |
No sudden loss of generation greater than 450 MW occurred on September 1, 2025.
|
Operational Information |
Active |
| Sep 1, 2025 8:46:18 AM |
The Daily RSASM for 09/01/2025 will not be occurring due to zero participating QSEs.
|
Operational Information |
Active |
| Sep 1, 2025 12:18:29 AM |
No sudden loss of generation greater than 450 MW occurred on August 31, 2025.
|
Operational Information |
Active |
