Upper panel of the plot shows population-weighted high and low temperature for each day (note: day-1 has high temperature only). Lower panel shows the forecast electricity demand for the service area of the company, in percentage of the normal demand expected under normal weather conditions during this 7-day period.
as observed at Monroe, Monroe Airport
About Pee Dee EMC (NC): Serving over 20,000 members in Anson, Richmond, Union, Stanly, Montgomery, Moore, and Scotland counties. (see website)