NOTICE DATE: January 20, 2012

NOTICE TYPE: W-A012012-01 Operations

SHORT DESCRIPTION: Delayed wind forecast delivery

INTENDED AUDIENCE: QSEs

DAYS AFFECTED: January 19 and 20, 2012

LONG DESCRIPTION: The Wind Generation Resource forecasts – Short-Term Wind Power Forecast (STWPF) and Wind-powered Generation Resource Production Potential (WGRPP) – were delivered late for the intervals listed below. ERCOT asks that Qualified Scheduling Entities (QSEs) use the most recent STWPF to update their Current Operating Plan (COP) for Reliability Unit Commitment studies. Due to the late delivery, QSEs may not have been able to update their COPs on time with the most recent forecast. A fix to the ERCOT issue listed below will be moved to production on January 23, 2012. The vendor issues listed below have been resolved.

Intervals Affected (MM/DD/YYYY)

Reason

01/19/2012 03:15

01/20/2012 01:15, 02:15

Increased database load caused high response times resulting in wind forecast posting delays

01/19/2012 14:15

Wind forecast Vendor issues

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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