I just checked the Nexrad Wind Profilers in Southern Florida.
Key West-max of 78kts at 19000ft.
Miami- max of 45kts at 20000ft.
Tampa-max of 58kts at 45000ft.

All of the current winds on the profilers appear to be unidirectional.
Dr Greg Forbes at TWC just displayed One front as Stationary from North of Ft Myers to the Melbourne area.
With SE winds on the south side of the front and NE winds on the North side. Combined with Wilma's wind field this is probably the setup for the spin associated with the Tornado Warnings.

00Z Soundings aren't in as of yet.
12Z soundings from Key West indicated a helicity of near 150m/s/s., and Tampa's helicity was near 100m/s/s.
(I hope I got the m/s/s correct~danielw)