NOTICE DATE:  March 15, 2011
NOTICE TYPE:  W-B031111-03 Extracts - Wholesale
SHORT DESCRIPTION:  Corrected values for the Mid-Term Load Forecast data sets - Revised Actual Totals on attachment
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  March 11, 2011
LONG DESCRIPTION:  The attachment on the previous Notice (W-B031111-02) incorrectly calculated the totals for the Actual Data. The attached spreadsheet has been revised to correct this error.
Due to manual operator overrides within ERCOT operating systems, the provided values of the Mid-Term Load Forecast were incorrect in both the West and Far West zones between 09:00 and 23:00 on March 11, 2011. ERCOT's Energy Management System (EMS) was using the correct calculations, only the presented values to the Market were incorrect in the reports and dashboards.
The attached spreadsheet provides the correct Mid-Term Load Forecast actual load values for the West and Far West zones, as well as the updated Total Load for 09:00 - 23:00 on March 11, 2011.
A defect has been written to address the presented values for manual overrides going forward.
ADDITIONAL INFORMATION:  The Mid-Term Load Forecast and Total Load information can be accessed through the following data points:

*         NP3-560-CD Seven Day Load Forecast by Forecast Zone

*         NP3-561-CD Seven Day Load Forecast by Weather Zone

*         Nodal Control Area Historical Load

*         Load Forecast vs Actual Dashboard on MIS

*         EWS Forecasted Load
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]<mailto:[log in to unmask]>.
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