Natural Gas Prices Explained: Henry Hub, Storage and Winter Demand

Natural gas heats a large share of American homes, fuels the biggest single slice of US electricity generation and feeds industries from fertilizer to plastics. Its price is also notoriously jumpy, capable of doubling or halving within months. Understanding why starts with a single pipeline hub in Louisiana, a weekly government report and the weather forecast. This guide explains how the US gas price is set and what moves it.

Henry Hub: the benchmark

When people quote "the price of natural gas" in the US, they usually mean the Henry Hub price. Henry Hub is a pipeline interconnection in Erath, Louisiana, where numerous interstate and intrastate pipelines meet. Its location near Gulf Coast production, storage and processing made it a natural pricing point.

Prices are quoted in dollars per million British thermal units ($/MMBtu), a measure of energy content rather than volume. Gas at other locations trades relative to Henry Hub. The difference is called basis. Regions with pipeline bottlenecks can see large discounts when local supply exceeds takeaway capacity, and some West Texas locations have at times traded below zero. Regions that depend on constrained pipelines in winter, such as parts of New England, can see big premiums during cold snaps.

How futures set the price

The headline Henry Hub price most media report is the front-month futures contract traded on NYMEX, part of CME Group. Each contract represents a set quantity of gas delivered at Henry Hub during a specific future month.

Futures serve two groups:

• Hedgers, such as producers, utilities and large industrial users, who lock in prices to reduce uncertainty.
• Speculators, who take positions on the direction of prices and provide liquidity.

Because each contract covers a different delivery month, the market produces a forward curve showing prices for gas delivered over the coming months and years. That curve often has a seasonal shape, with winter contracts priced higher than summer ones. If you are new to how these contracts work, our explainer on how commodity futures work covers margin, expiration and rolling.

Spot or "cash" gas also trades daily for next-day delivery at Henry Hub and other hubs, and it can diverge from the futures price, especially during extreme weather.

The seasonal rhythm: injection and withdrawal

US natural gas follows a two-season cycle:

Storage is mostly in depleted oil and gas reservoirs, aquifers and salt caverns. Salt caverns can inject and withdraw quickly, while depleted reservoirs hold larger volumes but cycle more slowly.

The amount of gas in storage heading into winter is one of the most closely watched numbers in the market. A storage level well below its recent average raises the risk of shortages during a cold winter and tends to push prices up. A comfortable surplus does the opposite.

The weekly EIA storage report

Every week, usually on Thursday morning, the US Energy Information Administration (EIA) publishes the Weekly Natural Gas Storage Report. It estimates working gas in storage across several US regions and the change from the prior week.

The market reacts not to the number itself but to how it compares with expectations:

• Versus analyst forecasts. A larger-than-expected injection (or smaller withdrawal) suggests a looser market and is usually bearish. A smaller injection or bigger withdrawal is usually bullish.
• Versus last year and the five-year average. These comparisons show whether storage is running tight or comfortable for the time of year.

Prices can move sharply in the minutes after the release, which is why it is a fixture on many traders' calendars.

What moves natural gas prices

Weather

Weather is the single biggest short-term driver. Cold winters raise heating demand, and hot summers raise demand from gas-fired power plants running air conditioning loads. Traders watch heating degree days and cooling degree days, measures of how far temperatures sit from a baseline, along with forecasts several weeks out. A forecast shift toward colder or hotter weather can move prices before a single extra cubic foot is burned.

Production

US output has grown substantially since the shale revolution, driven by basins such as Appalachia's Marcellus and Utica, the Haynesville in Louisiana and East Texas, and the Permian in West Texas and New Mexico. In the Permian, much of the gas is associated gas, produced as a byproduct of oil drilling, so oil prices can affect gas supply. Production responds to prices with a lag, because drilling and completing wells takes months.

LNG exports

The US has become a major exporter of liquefied natural gas (LNG), with export terminals concentrated along the Gulf Coast. LNG links US prices more closely to global markets in Europe and Asia. When an export terminal goes offline for maintenance or an outage, more gas stays in the domestic market, which tends to pressure Henry Hub. New terminals coming online add demand.

Power sector switching

Power generators can often choose between gas, coal and renewables. When gas is cheap relative to coal, generators burn more gas, which supports demand and helps put a floor under prices. Strong output from wind and solar can reduce gas burn on some days.

Pipelines and infrastructure

Pipeline capacity determines whether gas can reach the markets that want it. Outages, maintenance and new pipelines all shift basis prices and sometimes Henry Hub itself. Hurricanes in the Gulf of Mexico can affect both supply and LNG exports, with the price impact depending on which effect dominates.

Natural gas vs oil: a quick comparison

Gas and oil are both energy commodities but trade very differently. Oil is easily shipped by tanker and priced largely on a global market, while most US gas moves by pipeline and is priced regionally, with LNG providing a growing but limited link to world prices. For background on the oil side, see our guide on how oil prices are set.

How individuals get exposure, and the risks

Investors typically encounter natural gas through futures, exchange-traded products that hold futures, or shares of producers, pipeline operators and utilities. Each behaves differently:

• Futures-based funds can diverge sharply from the spot price over time because of the cost of rolling contracts, especially when the forward curve slopes upward.
• Producer stocks reflect company-specific factors such as costs, debt and hedging, not just gas prices.
• Pipeline and utility companies often depend more on volumes and regulated returns than on the gas price itself.

Natural gas is among the most volatile widely traded commodities, and leveraged or inverse products amplify that volatility. Reading a product's prospectus and understanding how it tracks gas prices is essential before considering any exposure.

Keeping track of the market

A few free, official sources cover most of what drives prices: the EIA's weekly storage report and its regular short-term energy outlook, NOAA's weather outlooks, and CME Group's published futures settlement prices. Watching storage against the five-year average and the weather forecast for the next few weeks explains a large share of what moves the market.

This article is for general information and education only and is not financial, investment, tax or legal advice. Consider your own circumstances and consult a licensed professional.