Extreme Weather Response Risk Element

Extreme Weather Response Risk Element
By Tyreke Griffin, Risk Assessment Engineer

Past NERC assessments indicate that extreme weather caused most major Bulk Power System (BPS) impacts. The 2026 CMEP IP highlights three Reliability Standards related to the Extreme Weather Response Risk Element for auditors to prioritize. These Standards are EOP-011-4, EOP-012-3, and FAC-003-5. Of the three, EOP-012 is the newest Standard and has had a version change with an effective date of October 1, 2025.

Key components of EOP-012-3 include:

• Oversight: EOP-012-3 mandates timely submission and Compliance Enforcement Authority (CEA) approval before Generator Cold Weather Constraints are considered valid. This improves oversight and uniformity of constraint handling across regions.
• Corrective Action Plan (CAP) Timelines: The latest version of EO-012 tightens the timeline for implementing corrective actions after a Generator Cold Weather Reliability Event, ensuring faster mitigation.
• Re-evaluations: Generator Cold Weather Constraints must be reassessed every 36 months. This ensures adaptation to new technology, equipment changes, and evolving weather risks.
• Compliance: A Compliance Abeyance clause was added to the standard. From the effective date of Reliability Standard EOP-012-3 (October 1, 2025) until October 1, 2027, the CEA will not pursue an action under Sections 4A.0 or 5.0 of Appendix 4C to the Rules of Procedure for a failure to comply with Reliability Standard EOP-012-3 Requirement R1 Part 1.1 with respect to the calculation of the Extreme Cold Weather Temperature.

The 2025 Cold Weather Preparedness FAQ answers compliance questions for the different topics mentioned in EOP-012-3, including Extreme Cold Weather Temperature, Corrective Action Plans, Generator Cold Weather Reliability Events, Cold Weather Critical Components, and cold weather constraints. This document may be useful for entities when performing internal audits for the EOP-012-3 standard.

When assessing risk related to EOP Standards, several indicators may warrant increased attention. Geographic location is a key consideration, particularly for facilities located in weather zones that are susceptible to extreme conditions such as high winds or severe winter weather. Risk concerns may also increase when units have experienced significant derates during weather-related events or when weather is a contributing factor to an incident. Compliance history is another important factor, especially in cases involving repeated self-reports or Potential Non-Compliance (PNC) findings related to EOP Standards. At the same time, proactive self-reporting can serve as a positive indicator of effective detective internal controls and a strong compliance culture.

Applicable registered entities should expect to see the following Standards–EOP-011-4 and EOP-012-3 —in their 2026 engagement scopes (if those Standards are applicable and have not been included in a recent engagement). During an engagement, in addition to evaluating compliance, the Texas RE engagement team will look at preventive, detective, and corrective controls that an entity uses to mitigate overall risks. Texas RE engagement observations may be reflected in the entity’s next Compliance Oversight Plan.