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Weather Normalization Adjustment for Commercial Customers

A commercial or industrial customer served under Rate Schedule 2B or 2C, General Firm Gas Sales Service or Rate Schedule 4, General Air Conditioning Firm Gas Sales Service, may make a request for exemption from the WNA adjustment if their gas usage is not affected by the weather. A study of the usage will determine if the request falls within the approved guidelines. 

Why Request a Usage Study?
The WNA is designed to reduce sudden changes or volatility in the customer bill.  Volatility is created when a customer’s usage is affected by weather.  The WNA accomplishes reduction in volatility by comparing the actual weather that occurred during a billing period to normal weather (defined below) and adjusting the bill to normal weather.  

This adjustment is a credit to the bill if the weather is colder than normal and a surcharge to the bill if the weather is warmer than normal.  No adjustment occurs in normal weather.  Thus the WNA would not be appropriate to apply to a customer’s bill whose usage is process driven rather than weather driven.

If you are a commercial or industrial customer served under Rate Schedule 2B, 2C or Rate Schedule 4 to whom this applies, please contact Customer Care at 866.229.3578, 8 a.m. to 8 p.m., Monday through Friday, or on Saturdays from 9 a.m. to 1 p.m. or send an email to vngcustomercare@aglresources.com.  Details may be found in Rider C included in VNG Terms and Conditions.

Weather Normalization Adjustment for Commercial and Industrial Customers
In September 2007, the Virginia State Corporate Commission (VSCC) approved a WNA on an experimental basis for commercial and industrial customers beginning in November 2007. The 2008-09 heating season completed this test period. The VSCC extended the WNA for two more heating seasons with one change. Beginning November 2010, a commercial or industrial customer whose gas usage is process driven rather than weather driven may elect to exempt from the WNA.  In February 2011 VNG filed to make Rider C a permanent rider to the Terms and Conditions.

Normal weather conditions measured in heating degree days (HDD) are based on a rolling 30-year period. For the 2013-2014 heating season normal degree-days will be based on the period from October 1983 through May 2013.
 
The WNA applies to six bills during the winter heating season typically November through April. Each bill period during that time will have a different WNA factor.
 
WNA provides weather sensitive customers relief during extremely cold winter weather and the company revenue stability to help plan and schedule system maintenance and improvements that contribute to operational quality and pipeline safety.