For reference, here is 500mb sounding climatology for OUN (Norman, OK) and LZK (Little Rock, AR). Not completely unprecedented, but fairly uncommon. Strong upper level flow at these latitudes, *with substantial instability,* is much more common in April/May than June. #arwx #okwx pic.twitter.com/OSmAYRv54x

— Quincy Vagell (@stormchaserQ) June 7, 2023