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UPDATE: Natural Gas Inventory +53 bcf vs +48 bcf Expected

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August 17, 2017 10:30 AM EDT
(Updated - August 17, 2017 10:31 AM EDT)

Natural Gas Inventory +53 bcf vs +48 bcf Expected

Historical Comparisons
Stocks
billion cubic feet (Bcf)		 Year ago
(08/11/16)		5-year average
(2012-16)
Region08/11/1708/04/17net changeimplied flow Bcf% changeBcf% change
East701 673 28 28 761 -7.9 717 -2.2
Midwest798 771 27 27 859 -7.1 776 2.8
Mountain204 202 2 2 217 -6.0 181 12.7
Pacific292 289 3 3 313 -6.7 332 -12.0
South Central1,087 1,094 R -7 -7 1,187 -8.4 1,021 6.5
Salt283 290 R -7 -7 306 -7.5 258 9.7
Nonsalt804 804 0 0 881 -8.7 764 5.2
Total3,082 3,029 R 53 53 3,336 -7.6 3,027 1.8
R=Revised.
Working gas stocks were revised to reflect resubmissions of data during the six-week period from June 30, 2017 to August 4, 2017, in large part because of restatements of natural gas in storage from working gas to base gas. The effect of revisions on the weekly implied net change ranged between 0 Bcf and 2 Bcf in magnitude, because the working gas levels were revised downward by 10 Bcf on average each week during this period.

Reported revisions caused working gas stocks for August 4, 2017, to change from 3,038 Bcf to 3,029 Bcf. The implied net change between the weeks ending July 28, 2017, and August 4, 2017, increased by 2 Bcf, from 28 Bcf to 30 Bcf.

Working gas stocks for the week ending June 30, 2017—the first updated report period—were revised from 2,888 Bcf to 2,878 Bcf. As a result, the implied net change for that report week is 62 Bcf, and the implied net flow to working gas for the week remained unchanged at 70 Bcf. More information about the revised working gas volumes during this period is available in the history, and in the revisions spreadsheets.

Summary

Working gas in storage was 3,082 Bcf as of Friday, August 11, 2017, according to EIA estimates. This represents a net increase of 53 Bcf from the previous week. Stocks were 254 Bcf less than last year at this time and 55 Bcf above the five-year average of 3,027 Bcf. At 3,082 Bcf, total working gas is within the five-year historical range.

For information on sampling error in this report, see Estimated Measures of Sampling Variability table below.

Working Gas in Underground Storage Compared with Five-Year Range

Note: The shaded area indicates the range between the historical minimum and maximum values for the weekly series from 2012 through 2016. The dashed vertical lines indicate current and year-ago weekly periods.



Estimated measures of sampling variabilityDownload History (April 2015 to Present)
Coefficient of Variation for Stocks
% of working gas		 Standard Error for Net Change
billion cubic feet (Bcf)
Region08/11/1708/04/17 net change
East1.4 1.4 0.6
Midwest1.4 1.5 0.8
Mountain1.6 1.6 0.3
Pacific2.7 2.8 0.3
South Central1.7 1.7 0.7
Salt3.5 3.6 0.7
Nonsalt1.9 1.9 0.2
Total0.8 0.8 1.3

Estimated measures of sampling variability were revised for the period from June 30, 2017 to August 4, 2017. More information about the revised estimated measures of sampling variability during this period is available in the estimated measures of sampling variability spreadsheet.

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