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 Yankton, Chan Gurney Municipal Airport
About Cedar-Knox PPD (NE): Serving 6,733 members in all of Cedar, and parts of Knox, Pierce, Wayne, and Dixon counties in northeast Nebraska. (see website)