ABOUT THIS INDEX

What is West Market GWDD?
If the only gas demand in the country was in the West, weighted by where Western delivery points are, how much heating demand is there? That is what this index answers. A standalone weather-driven demand signal for Western US physical gas markets — not a slice of the national GWDD, but its own index with proprietary regional weights tuned to Western basis trading.

How to read it
Compare the West GWDD to its 30-year normal. A positive deviation means colder-than-normal weather driving higher Western heating demand — bullish for basis at EP, TW, SoCal, PG&E, and Waha delivery points. A negative deviation means milder weather and weaker demand pull — bearish for Western basis. The model trend chart shows how the forecast has evolved across runs, helping identify warming or cooling trends before they hit the market.

Important limitations
This is a theoretical, weather-driven demand model. It does not account for pipeline maintenance, operational flow orders (OFOs), import/export swings, storage inventory levels, LNG feedgas demand, power burn substitution, or other supply-side and infrastructure factors that materially affect realized Western basis pricing. Use as one input among many — not as a standalone trading signal.