Good insight, I need to get better about remembering this. Being based further north (like you) I've seen many an early season (even well into May for us) potential setup get quashed by insufficient instability, so I'm a CAPE guy. I get really geeked out to chase on those 86/77 days, then wonder why the updrafts weren't going up like atom bombs. This mindset cost me on 4/9/2015, when I was bumming around IN OGLE COUNTY, IL until about 4:30 PM, then threw in the towel and started for home. Got there just in time to pull up GR Level 3 and see the debris ball about 10 miles from where I'd just been 90 minutes before.