Natural Gas +53 Bcf vs +53 Est — Third Week Below Normal, and Salt Drew Again
Fundamentals · 2026-09-24
Working gas in storage rose 53 Bcf in the week to 18 September against a 53 Bcf consensus, after +44 the week before — in line with the survey, but 23 Bcf below the five-year average build of +76 and 24 Bcf below the year-ago +77, the third straight week under the seasonal norm. Total stocks 3,351 Bcf — 146 Bcf (-4.2%) below last year and 95 Bcf (+2.9%) above the five-year average, a surplus that has shrunk from 118 a week ago. South Central added only 2 Bcf against a normal ~18, and its salt caverns drew 5 Bcf for a second week, to 217 Bcf — 27.2% below a year ago and 12.5% below their five-year average. East (+20) and Midwest (+25) did the building. Standard error on the net change 0.8 Bcf. Next release 1 October.
What It Changes
- Nothing against consensus, and the consensus was never the test. A 53 Bcf print against a 53 Bcf estimate is a zero surprise; against the seasonal norm it is a 23 Bcf shortfall, following 12 and 29 in the two weeks before.
- The five-year surplus is eroding at about 20 Bcf a week. It was 118 Bcf a week ago and is 95 now. About four more weeks like this and stocks are at the five-year average by mid-October.
- The shortfall is almost entirely South Central. Roughly 16 of this week's 23 Bcf gap sits in that one region, and about 11 of it in salt caverns — the rest of the country is building within a few Bcf of normal.
- Salt is now the number. Two consecutive weekly draws in injection season have taken South Central salt from 8.3% below its five-year average to 12.5% below, and it is the fast-cycling storage that meets winter demand spikes.
Impact
- Natural Gas (NG) — Mixed, lean bullish — an in-line headline gives the front month no surprise to trade on the day, but every seasonal comparison in the release points the same way it has for three weeks: a slower refill, concentrated in the region that serves Gulf Coast exports.
- The level is still a cushion, not a shortage. At 3,351 Bcf stocks are 95 Bcf above the five-year average and EIA places them "within the five-year historical range" — the tightening is in the trajectory and in salt, not in the total.
- The end-of-season arithmetic tightened only slightly. Six weeks of injection remain to the end of October: at this week's 53 Bcf pace stocks peak near 3,670 Bcf, at a five-year-like 76 Bcf near 3,810. Last week's 44 Bcf pace implied about 3,606.
- USD — Neutral — gas storage has no dollar transmission.
- US Indices (ES / NQ / YM / RTY) — Neutral — the exposure runs through utilities and gas-intensive industry, not the index, and today's market is trading the 10-year and the 7-year auction.
Inside The Number
Working gas in underground storage in the Lower 48 rose 53 Bcf in the week ending Friday 18 September, taking total stocks to 3,351 Bcf. Consensus was +53 Bcf, and the prior week was +44 Bcf, unrevised: last week's reported 3,298 is this week's starting point. EIA's standard error on the national net change is 0.8 Bcf, so the print is precise; it just is not a surprise.
The seasonal comparison is where the information is. EIA's five-year average stock moved from 3,180 Bcf to 3,256 Bcf between the two report dates, which puts the five-year average build for this week at +76 Bcf. Year-ago stocks moved from 3,420 to 3,497, a +77 Bcf build. This week's 53 is 23 Bcf below the five-year norm and 24 below last year. The sequence of shortfalls against the five-year build over the last three weeks is 12, 29 and 23 Bcf. This week's build is larger than last week's, but the seasonal norm rose with it.
So the two level comparisons keep moving apart. Stocks are 146 Bcf below a year ago (3,497 Bcf), a 4.2% deficit that has widened from 122 Bcf. They are 95 Bcf above the five-year average (3,256 Bcf), a 2.9% surplus that has narrowed from 118. Both are true, and the direction of both is the same: less gas in the ground relative to normal than a week ago.
The regional split shows where the shortfall is. EIA publishes each region's stock against its year-ago and five-year levels, and differencing those against last week's report gives each region's normal build for this week. The results are approximate — the published percentages are rounded — but the pattern is not close:
- East built 20 Bcf against a normal of about 23.
- Midwest built 25 against about 28.
- Mountain built 3 against about 4, and Pacific 3 against about 3.
- South Central built 2 against about 18, a shortfall of roughly 16 Bcf, and inside it salt drew 5 against a normal injection of about 6, a gap of about 11 Bcf.
The four northern and western regions were a combined 7 Bcf short of normal. South Central alone was 16 short. That is the same shape as last week, when South Central drew 5 Bcf, and it is why the national number has undershot the seasonal norm three weeks running.
South Central salt has now drawn in consecutive weeks of September. It fell 5 Bcf last week and 5 Bcf this week, to 217 Bcf. It is 27.2% below a year ago (298 Bcf) and 12.5% below its five-year average (248 Bcf) — a week ago those gaps were 24.0% and 8.3%. Nonsalt added 8 Bcf to 825 Bcf, still 1.7% above its five-year average but 7.1% below last year. The standard error on the salt net change is 0.2 Bcf, so the draw is a measured draw.
Why salt matters more than its size. Salt caverns can be filled and emptied several times a season, which makes them the system's response capacity for cold snaps and demand spikes. Nonsalt depleted reservoirs hold more gas and cycle slowly. A South Central salt position a quarter below last year, still falling in late September, means the national total overstates how much gas can be delivered quickly when winter demand arrives. The release does not say why salt is drawing; South Central sits alongside the Gulf Coast LNG export terminals, and last week's brief placed the likely pull there, but EIA reports storage, not end use.
The rest of the country is in good shape against its own history. East holds 815 Bcf, 5.2% above its five-year average; Midwest 959 Bcf, 3.5% above; Mountain 244 Bcf, 7.0% above; Pacific 292 Bcf, 9.8% above. East and Midwest are also above last year; Mountain and Pacific are below it. South Central, at 1,041 Bcf, is the only region below its five-year average, at -1.7%, and it holds about 31% of all working gas.
The Internals
The headline against every benchmark:
Comparison · Value · Gap · Read
This week's build · +53 Bcf · n/a · The print
Consensus · +53 Bcf · 0 Bcf · In line
Prior week · +44 Bcf · +9 Bcf · Larger build, unrevised prior
Five-year average build, this week · +76 Bcf · -23 Bcf · Third straight week below normal
Same week a year ago · +77 Bcf · -24 Bcf · Below last year again
Standard error on the net change · 0.8 Bcf · n/a · A precise print
The shortfall against the five-year build, three weeks:
Week ending · Build · Five-year average build · Shortfall
4 September · +40 Bcf · About +52 Bcf · About 12 Bcf
11 September · +44 Bcf · +73 Bcf · 29 Bcf
18 September · +53 Bcf · +76 Bcf · 23 Bcf
Stock levels:
Measure · 18 September · 11 September · Change
Total working gas · 3,351 Bcf · 3,298 Bcf · +53
Year-ago stocks · 3,497 Bcf · 3,420 Bcf · +77
Deficit to last year · -146 Bcf, -4.2% · -122 Bcf, -3.6% · Widened 24
Five-year average stocks · 3,256 Bcf · 3,180 Bcf · +76
Surplus to five-year average · +95 Bcf, +2.9% · +118 Bcf, +3.7% · Narrowed 23
Regional detail, Bcf:
Region · 18 Sep · 11 Sep · Net · Year ago · vs year ago · Five-year average · vs five-year
East · 815 · 795 · +20 · 803 · +1.5% · 775 · +5.2%
Midwest · 959 · 934 · +25 · 941 · +1.9% · 927 · +3.5%
Mountain · 244 · 241 · +3 · 265 · -7.9% · 228 · +7.0%
Pacific · 292 · 289 · +3 · 300 · -2.7% · 266 · +9.8%
South Central · 1,041 · 1,039 · +2 · 1,188 · -12.4% · 1,059 · -1.7%
South Central salt · 217 · 222 · -5 · 298 · -27.2% · 248 · -12.5%
South Central nonsalt · 825 · 817 · +8 · 888 · -7.1% · 811 · +1.7%
Total Lower 48 · 3,351 · 3,298 · +53 · 3,497 · -4.2% · 3,256 · +2.9%
This week's build against the normal build, by region, derived from EIA's published comparisons:
Region · Actual build · Approximate five-year build · Approximate gap · Approximate year-ago build
East · +20 · +23 · -3 · +25
Midwest · +25 · +28 · -3 · +25
Mountain · +3 · +4 · -1 · +5
Pacific · +3 · +3 · 0 · +4
South Central · +2 · +18 · -16 · +18
South Central salt · -5 · +6 · -11 · +6
South Central nonsalt · +8 · +13 · -5 · +11
Total Lower 48 · +53 · +76 · -23 · +77
Where the injection season ends, on flat paces over the six remaining weeks to 30 October:
Pace · Weekly build · Implied end-October stocks
Five-year-like · +76 Bcf · About 3,807 Bcf
This week's build · +53 Bcf · About 3,669 Bcf
Last week's build · +44 Bcf · About 3,615 Bcf
Sampling variability:
Region · Coefficient of variation on stocks · Standard error on the net change
Total Lower 48 · 0.4% · 0.8 Bcf
East · 0.6% · 0.4 Bcf
Midwest · 0.8% · 0.4 Bcf
South Central · 0.8% · 0.3 Bcf
South Central nonsalt · 1.0% · 0.3 Bcf
Mountain · 3.0% · 0.3 Bcf
South Central salt · 1.3% · 0.2 Bcf
Pacific · 0.0% · 0.0 Bcf
Regional And Facility Detail
Every region built except salt. East +20, Midwest +25, Mountain +3, Pacific +3, South Central +2, which reconciles to the national 53. Inside South Central, nonsalt added 8 and salt drew 5.
East and Midwest carry the season and are comfortable. Together they added 45 of the 53 Bcf. East at 815 Bcf and Midwest at 959 Bcf are both above last year and above their five-year averages. They serve the largest winter heating load, so their position is the main reason the national picture is not a concern yet.
The West is building normally from a surplus. Pacific built 3 Bcf, in line with its normal for the week, and is 9.8% above its five-year average, the largest relative surplus in the country. Mountain is 7.0% above. Both are below last year, and neither can move much gas to the Gulf Coast.
South Central is the only region below its five-year average, and it is getting further below. It moved from -0.2% a week ago to -1.7% this week, and from -11.2% to -12.4% against last year. Nonsalt, the slow baseload storage, is fine against its five-year norm at +1.7%. The deficit is in salt.
Measurement. EIA's standard error on the national net change is 0.8 Bcf and on the salt net change 0.2 Bcf, so both the 23 Bcf seasonal shortfall and the 5 Bcf salt draw are well outside survey noise. Mountain carries the loosest stock measurement at 3.0% coefficient of variation, and its 3 Bcf build is the least reliable regional figure this week.
Against This Morning's Open
- The Open's row was right on every field this week — The Open tabled "EIA natural gas storage, w/e Sep 18" at 10:30 with a +53 Bcf consensus and a +44 Bcf prior, and tagged it NG only; the print was +53 against an unrevised +44.
- That closes out last week's correction. Last Thursday's row carried the wrong week-ending date and put the consensus in the prior column; this week's has the Friday date and the right prior.
What This Sets Up
- Next release — Thursday 1 October, 10:30 ET, covering the week to 25 September.
- Whether South Central salt draws a third week. Two consecutive September draws is unusual; a third would put salt further below its five-year average heading into the last month of injection.
- Whether the five-year surplus keeps shrinking at about 20 Bcf a week. It is 95 Bcf now; at this rate it is gone in about four weeks, before the season ends.
- The end-October peak. Six weeks remain; the gap between this week's pace and a five-year-like pace is about 140 Bcf at the peak, and that is the cushion winter prices against.
What Is This?
- What it is: The Weekly Natural Gas Storage Report, published by the Energy Information Administration every Thursday at 10:30 ET for the week ending the previous Friday. It reports working gas — gas that can actually be withdrawn — in underground storage across the Lower 48, split into five regions, with South Central further split into salt caverns and nonsalt depleted reservoirs. Each figure is compared with the same week a year earlier and with the five-year average, and EIA publishes sampling variability alongside. The data come from Form EIA-912.
- Why it matters: Natural gas demand is intensely seasonal and storage is the market's main physical buffer. The year splits into an injection season, roughly April to October, and a withdrawal season through winter. How much gas is in the ground when injection ends sets the cushion for winter heating and power demand, which is why the late-September trajectory matters more than any single week's level.
- How to read it: Compare the build with the five-year average for the same week, not only with consensus — consensus tells you what traders expected, the seasonal average tells you whether storage is keeping pace. The year-ago and five-year comparisons often point in different directions, as they do now; quote both. Salt and nonsalt do different jobs — salt cycles fast and meets demand spikes, nonsalt is slow baseload — so a national total can look adequate while the responsive storage is thin. And the weekly number is a survey with published error bars, currently 0.8 Bcf on the national change.
Want the full explainer? Economic News Events, Explained breaks down this release and every other one we cover, in plain English.
_For informational purposes only. Not investment advice._