Andrea Griffa
EF5
Several interesting things to note... Firstly, this storm largely lacked any sort of anvil feature. In fact, the storm looked highly sheared / tilted over, and relatively low-topped given the lack of anvil features.
Glad you reminded me ... intended to mention this as well. Storm tops up here were also noticeably low, with very little in the way of anvil features as the photos show. The Davies Co. storm had the closest thing to an anvil feature that appeared to be pushing back to the west, but still quite a low-topped storm. Wondered if anyone may have glanced at cloud top readings at some point to let us know what was returning on these storms.
Don't have a chase report - but maybe I can address this issue.
There is a good probability that this was caused by a sharp inversion at midlevels that acted to limit the storm tops, or at least slow the updraft down enough that the tops essentially where blown downwind by the strong winds at midlevels. Take a look at the soundings from last night - say from TOP or OMA - and you'll see what I'm talking about. In case you are wondering, the sharp inversion is caused by strong subsidence owing to the cold air advection (CAA) below this level. If you looked at the obs/model guidance yesterday, you'll note that a cold front aloft advanced out ahead of the surface boundary - which weakened (erased in some cases leading to a deep dry adiabatic layer) the cap allowing storms to develop, but also would have led to subsidence and the mid-level inversion noted in the soundings.
Glen
Yes I think you 're right; if you see this sounding:
[Broken External Image]:http://weather.uwyo.edu/upperair/images/2004103000.72558.skewt.gif
You can see a strong inversion at nearly 500mb; the equilibrium level infact is at 540mb...Probably tho only form of strong convection that could develop was minisupercell. Then a good presence of cape in the 0-3km layer can have helped the convection.