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 Decatur, Pryor Field
About Decatur Utilities (AL): Providing electricity, natural gas, water and wastewater services in the greater Decatur, Alabama area to over 30,000 customers. (see website)