The traditional inventory–building season is April to October for natural gas. The volume of working gas in underground storage by November 1 has to meet winter's demands under any circumstance. The volume in storage in August was approximately 63 percent of storage capacity.
In August 2018, Nebraska had the capacity to store 12,653 million cubic feet (mmcf) of working natural gas or working gas, and there was 7,958 mmcf working gas according to Energy Information Administration estimates. As shown in Figure 1 and the data table below, this volume of working gas is an increase of 835 mmcf from last month but 918 mmcf lower than last year at this time. Stocks were 2,108 mmcf lower than the five–year average. Figure 1 also shows that the volume of working gas was below the five–year minimum.