Juston Drake and Simon Brewer documented supercell thunderstorm over Northwest Texas and Southwest Oklahoma. We intercepted a high-based outflow-dominant supercell east of Memphis, TX. It produced high winds, gustnadoes, and quarter-sized hail, but new updrafts were continuously feeding into the storm giving it problems. South of Hollis, OK along the Red River the storm reorganized and became a monster HP supercell. We were able to get back in front of the updraft west of Eldorado and were blown away by the impressive structure. There was a rapidly rotating wall cloud, a ground-scraping tail cloud, beaver's tail, and several mid-level inflow bands. The supercell was taking advantage of a narrow corridor of instability against an outflow boundary. We witnessed one brief tornado before rain-bands wrapped around the circulation hiding it from our view.