Wind Favors Hail

[jpbart]

Below is a statement from the NWS and I was hoping somebody could fill me in on what this forecaster is talking about here.  Trying to learn a bit about all of this.

Any instability that develops should be driven by steep
mid-level lapse rates in association with the deepening upper
trough. Why is this interesting? I`m glad you asked - it is
primarily owed to the wind profiles this afternoon being quite
favorable for severe hail. It is unlikely that we have even low
amounts of instability advect into our forecast area; however,
if a strong storm can sustain itself east of the better
environment, it wouldn`t be surprising that at storm or two
produced marginalia-severe or sub-severe hail.