Energy Market Charts: Supply, Demand and Inventories

The Weekly Natural Gas Storage Report is normally released on Thursday at 10:30 a.m. Eastern Time. Federal holidays can move the schedule. StorageCurve shows both the observation date and the time our updater first saw the new release.

It is the EIA estimate of working natural gas held in underground storage in the Lower 48 states. The report gives the level and the weekly net change, which can be an injection or a withdrawal.

EIA natural gas and petroleum inventory series are weekly. StorageCurve checks for source updates automatically and publishes a compact weekly observation rather than storing high-frequency duplicates.

The EIA Weekly Petroleum Status Report is normally released on Wednesday at 10:30 a.m. Eastern Time, with holiday exceptions. The data generally describe stocks at the end of the prior reporting week.

GIE says AGSI data is updated daily for the previous gas day, with publication rounds around 19:30 and 23:00 CET. StorageCurve samples this daily source into one big-picture weekly series.

The data-through date is the end of the measured period. The publication or first-observed timestamp is when that observation became available. A report can therefore be published several days after the storage date.

No. StorageCurve reports where physical inventories sit relative to their own recent history—not a predicted price, trading signal, or target. In our view, inventory data is one of the more reliable directional inputs available, but it remains one input among many, not a forecast on its own.

For the current seasonal week, StorageCurve averages the matching week from the five previous complete years. The current year is excluded so today’s value never changes its own benchmark.

Below-normal inventories leave less physical buffer for unexpected demand or supply disruption. That can increase scarcity pressure, but price also depends on production, weather, imports, exports, demand, transport constraints, and market positioning.

No. Above-normal storage is usually a looser physical backdrop, but it is not a stand-alone price forecast. Prices can rise despite high inventories when future supply risks or demand expectations change quickly.

It classifies the latest percentage deviation from the five-year seasonal average. A deficit is labelled tight and a surplus loose. The score is deterministic, transparent, and deliberately does not claim a target price.

It compares the latest weekly inventory change with the average change for the same seasonal week in the prior five years. A smaller gas injection or a larger draw than normal can indicate tightening.

Last year shows the closest seasonal analogue, while the five-year average reduces the risk that one unusual year dominates the comparison. They answer different questions and are most useful together.

For US gas and oil, it aligns EIA weekly Henry Hub or WTI spot prices with inventory dates. It is context for visual comparison, not proof that inventory changes caused each price move.

The headline curve uses EIA US ending stocks of crude oil excluding the Strategic Petroleum Reserve. This focuses the comparison on commercial crude stocks.

SPR barrels are government emergency stocks and behave differently from normal commercial inventory. Excluding them gives a cleaner view of the physical commercial balance followed by many oil-market participants.

Cushing is the designated physical delivery point for NYMEX WTI crude futures. Its inventory can therefore reveal local tightness or congestion that the national crude total may hide.

No. The EIA series reports ending crude stocks, not a live measure of every tank’s usable working capacity. Operational minimums, leased space, and pipeline constraints also matter.

No. The American Petroleum Institute publishes a separate industry estimate. StorageCurve v1 uses the official EIA API v2 series and does not blend the two releases.

No. The headline US crude metric is crude oil only. Product inventories can add valuable demand context, but they are outside this focused v1 dashboard.

It comes from the AGSI transparency platform operated by Gas Infrastructure Europe. StorageCurve uses the EU aggregate supplied by GIE and credits the source beside the chart.

AGSI reports the EU aggregate as energy in terawatt-hours and also provides percentage fullness. TWh makes the stored energy quantity comparable through time, while fullness shows how it relates to working capacity.

This product is designed for the big physical picture and comparison with weekly US releases. It keeps the last available AGSI observation in each ISO week, reducing noise and storage volume.

Yes. GIE notes that provider data can be changed, removed, or amended. The updater re-fetches history so corrected observations can replace older values without accumulating duplicate raw records.

AGSI labels data quality as confirmed, estimated, or no data. StorageCurve retains the aggregate status internally and publishes the latest available observation with its source update time.

No. V1 uses underground gas storage from AGSI. LNG terminal inventory and send-out are available through GIE’s separate ALSI platform and are a possible future product.

It should be used as one transparent physical-market input, not as a stand-alone trading signal. Storage data can be revised and does not capture every supply, demand, transport, weather, or financial-market driver.