Oklahoma City, OK hail storm history

What the National Weather Service wrote

Two primary rounds of severe convection occurred on the 23rd, with the first during the initial hours of the morning and the second during the early into late evening. The early morning round was fostered (in part) by a nocturnal low-level jet/ascent across portions of southwestern into south-central Oklahoma. Multiple reports of hail, including a few of severe-caliber, were received with this activity.

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A more impactful round of severe convection emerged by the late afternoon as an upper trough moved into portions of the Plains. Multiple supercell thunderstorms initiated off a dryline near the 100th meridian/far southeastern Texas Panhandle. Strong wind shear, instability and steep lapse rates promoted large to very large hail. As low-level shear increased and an emerging dominant supercell underwent favorable storm-scale interaction(s), significant tornadogenesis occurred. A long-lived and strong tornado occurred across portions of Jackson County, just west of Altus. Additional reports of severe weather were received by late evening from an evolving storm cluster across south-central Oklahoma. An additional supercell thunderstorm produced reports of large hail from the southern into northeastern portions of the Oklahoma City Metropolitan area earlier in the evening.