While I do expect it to get warm.. and this lingering cold layer is also fuel for thunderstorms, there is also a growing drought in the SW, US. In the Spring, you want to see troughs in the SW, US, that spurs on activity in the Midwest. That's a little different this year with a growing drought and kind of persistent ridging over the SW, US.
It may be a more active season further east from the typical areas.. although a lot of N. America is dry right now, a pattern that started last year.