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For companies forecasting power demand, what is the Power Weather IndexSM ?

April 26, 2017companies DEMAND forecasting indexsm power weather

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For companies forecasting power demand, what is the Power Weather IndexSM ?

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The Power Weather Index (PWI) is the percentage change in weather-driven electric power demand for the week, month or season versus the corresponding period of the previous year. The Power Weather Index is available for the U.S. as a whole, by North American Electric Reliability Corporation (NERC) regions and subregions and for major metropolitan areas. Developed from actual generation data that captures regional and seasonal differences, the PWI expresses expected year-on-year change in power demand directly attributable to weather at a specific time/location intersection.