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 McCook, McCook Municipal Airport
About Southwest PPD (NE): Serving the Nebraska communities of Culbertson, Haigler, Hayes Center, Palisade, Trenton and Stratton. (see website)