Crude oil inventories at Cushing, Oklahoma, have fallen below 25 million barrels—less than 2 million barrels above the storage hub’s operational floor, according to Wood Mackenzie. The decline, which stripped 11.3 million barrels from Cushing stocks between early April and early June 2026, is one of the steepest draws on record at the delivery point that anchors US crude pricing.
What is driving it, and how close the market is to a critical shortfall, is what the data now makes hard to ignore.
Cushing Inventories Approach Operational Floor
The numbers offer little reassurance. Storage capacity utilization at Cushing fell below 29% in early June 2026 — uncomfortably close to the all-time low of 26.7% that analysts treat as the hub’s recognized operational floor. Wood Mackenzie, which monitors fixed-roof tanks, caverns, and floating-roof tanks across the facility, assesses that inventories now sit less than 2 million barrels above that minimum threshold.
That margin is razor-thin. At the current pace of draws, Wood Mackenzie warns Cushing could reach its operational floor within one to two weeks. Below that level, the physical mechanics of pipeline delivery and storage management become severely constrained—with consequences extending well beyond Oklahoma.
Middle East Conflict and Export Surge Drive the Drawdown
The root cause, according to Wood Mackenzie Director of North American Crude Markets Dylan White is global rather than domestic. “Rapid Cushing storage draws have been spurred by global supply disruptions surrounding the Middle East conflict,” White said. Domestic production in the US and Canada has remained unaffected, but shortages elsewhere have pushed US crude exports and refinery runs sharply higher, draining commercial storage in the process.
Substantial releases from the Strategic Petroleum Reserve into Gulf Coast markets have not been enough to offset those commercial draws. PADD 3 — the Gulf Coast region — has seen its own crude inventories declining since early May. The tightening is no longer confined to a single hub; it is spreading across the broader US storage system.
Market Reacts as Pipeline Flows and Price Spreads Shift
The market has not waited for a crisis to respond. Permian Basin pipeline operators have already begun diverting volumes toward Cushing — away from the Gulf Coast — in an effort to keep physical inventories above minimum operating levels. The result has been a considerable tightening of WTI price spreads between Cushing and the coast, a signal that traders are pricing in the logistical strain.
The fix creates its own complications, though. White was direct: “Greater flows into Cushing shifts volumes away from other key hubs where inventories are also low.” Pulling barrels toward one stressed location relieves pressure there while compounding it elsewhere. Wood Mackenzie warns that accelerating draws across multiple US hubs could critically limit the country’s export capacity within one to two months—the same export capacity that has so far helped compensate for lost Middle Eastern supplies.
Cushing’s Role in Global Oil Pricing and the Broader Inventory Picture
Cushing is not simply a storage site. It is the physical delivery point for the WTI crude benchmark, which means its inventory levels feed directly into US and global oil price formation — when Cushing tightens, the signal travels through futures markets, refining economics, and trade flows all at once.
Wood Mackenzie’s monitoring methodology is worth noting. Unlike satellite-based tracking, which can estimate volumes in floating-roof tanks but cannot measure fixed-roof tanks or underground caverns, the firm’s comprehensive approach captures the full picture. That distinction lends its assessments greater reliability at a moment when precision carries real weight.
On a global scale, the inventory cushion has held—for now. SPR releases, commercial stocks, and floating storage have collectively softened the blow of Middle East supply losses, but that buffer is finite. “The inventory cushion is not infinite,” White said. “If supply disruptions persist, oil prices are expected to reflect a significantly tighter physical market as stocks are depleted.”
Disruptions in the Middle East Causing More Trouble
The situation at Cushing comes down to a few clear facts. Inventories fell 11.3 million barrels between early April and early June, landing less than 2 million barrels above the operational floor. The draw is linked to global supply disruptions from the Middle East conflict, which have driven US exports and refinery runs higher despite stable domestic production. SPR releases have not offset the decline. Pipeline operators are already rerouting flows to protect Cushing, but doing so strains other hubs. If draws continue at their current pace, Wood Mackenzie projects that critical inventory levels across key US hubs could be reached within one to two months—a timeline that puts US export capacity and, by extension, global supply balances under meaningful pressure.
Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.
