Quote:
Essentially, when the system gets wrapped up too tightly, the eyewall can breakdown into these vortices. Essentially, the eyewall is a sheet of what we call vorticity -- cyclonic spin. If the conditions are right, as they sometimes are with very intense storms, the eyewall can become barotropically unstable (what that exactly means is a matter which could take awhile to explain due to the math, but focus on the unstable part), leading to its spin-up into a number of vortices.
That is interesting. May be a stupid extrapolation, but wondering if this implies a tornado is inherently unstable during its entire lifespan.
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Re: Steve Gregory's Wunderground blog