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What Is the Natural Gas Storage Indicator?


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    Highlights

  • The EIA releases weekly estimates of working natural gas in underground storage every Thursday at 10:30 am EST, showing national and regional levels with net changes from withdrawals or injections
  • Unexpected inventory changes can directly impact natural gas prices, often moving them by 3 to 5 cents per MMBtu
  • The report includes comparisons to the previous week, a year ago, and the five-year average for context in trading decisions
  • Originally started by the AGA in 1994, the EIA assumed responsibility in 2002 to provide essential data on base and working gas in depleted fields, aquifers, or salt caverns
Table of Contents

What Is the Natural Gas Storage Indicator?

Let me explain directly: the Natural Gas Storage Indicator is the U.S. Energy Information Administration's (EIA) estimate of working natural gas volumes held in underground storage facilities, covering both national and regional levels. I want you to know that the EIA delivers these weekly estimates for the Lower 48 states and five specific regions, focusing on changes from net withdrawals or injections. You should note that the report comes out every Thursday at 10:30 am EST, and if there are unexpected shifts like higher-than-average withdrawals or injections, they can immediately push natural gas prices up or down.

Understanding the Natural Gas Storage Indicator (EIA Report)

Here's what you need to grasp: this indicator measures working gas, which is the volume above a base level in a reservoir, ready for sale in the marketplace. In the EIA report, you'll see inventories for the current reporting week compared to the previous one, including the net change, broken down nationally and for the East, West, and Producing regions. It also gives you historical context with data from a year ago and the five-year average. I rely on this to point out that the data comes from weekly surveys of a sample of underground storage operators, which the EIA uses to build regional and national estimates.

History of the Indicator

You should know the background: weekly estimates of working gas in storage began with the American Gas Association (AGA) in 1994, but by 2001, they stopped the survey due to resource issues. That's when the EIA stepped in to keep the natural gas market informed, releasing their first estimates for the week ending May 3, 2002.

The Indicator Goal

According to the EIA, the goal here is straightforward: to provide weekly estimates of working gas levels in underground storage for the U.S. and five regions. Remember, the total natural gas in these reservoirs is divided into base gas or working gas, and the facilities could be depleted oil and gas fields, aquifers, or salt caverns. As a trader or anyone following the market, you'll find this indicator crucial because the natural gas market reacts right away to the net inventory changes from the prior week. This data helps inform your trading decisions, often shifting prices by 3 cents to 5 cents per million British thermal units (MMBtu) each week when the report drops.

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