U.S. propane stocks hit a second straight record as Gulf Coast and Midwest tanks kept filling

U.S. propane inventories climbed to another record last week, RBN Energy reports, and the Gulf Coast plus the Midwest did almost all of the work. Those two regions accounted for roughly 92% of the weekly build. With tanks still filling this late in the year, stocks could keep climbing into October.

For haulers and retailers heading into heating season, a full tank is good news on price and bad news on margin. Supply this deep going into the fall usually keeps wholesale propane soft, which helps the customer's bill and squeezes the spread you make on each gallon delivered. The Gulf Coast doing the heavy lifting is the familiar pattern: NGL output keeps rising with associated gas from the Permian, and the fractionators turn it into propane faster than the export docks can ship it out, so the extra barrels stack up in inventory.

The Midwest piece matters more for anyone north of the Ohio River. PADD 2 stocks build ahead of winter because that's where the residential and crop-drying demand lands, and a harvest that needs a lot of drying can pull those tanks down fast. Full going in is the cushion you want. Whether it holds depends on how cold October and November run and how hard the export arb keeps pulling barrels toward the water.

SK Advanced merger

SK Gas plans to absorb SK Advanced and fold its propane and propylene operations into one company, thelec.net reports. This is a Korean corporate reshuffle, so it doesn't move a jobber's rack price this week. It's worth a line because SK is a large buyer of U.S. propane for its propane dehydrogenation plants, which crack propane into propylene for plastics. Consolidating those operations under one roof could change how SK schedules its feedstock purchases over time, and Asian PDH demand is one of the main things pulling U.S. Gulf Coast barrels onto ships. A buyer that runs its propane and propylene books together may buy differently than two separate units did.

Keep half an eye on it for that reason. It doesn't change prices this week.

What to watch

Whether the build keeps its pace, and whether it stays concentrated on the Gulf Coast or the Midwest starts drawing down as harvest drying picks up. Watch the export numbers out of the Gulf, since strong dock activity is the release valve that keeps a record inventory from turning into a sharp selloff. The first real cold snap matters too. A mild start to winter on top of stocks this high could keep wholesale propane cheap well into the season; an early freeze in the middle of the country could pull the Midwest cushion down quicker than the current build suggests.