In support of the "high CAPE compensates for low shear" idea, check out tonight's tornadic events in SW KS. Here is the 00Z sounding for Dodge City.
In terms of helicity, not terrible, but not something you'd look at and say "TORNADO!" However, there sure is plenty of instability. One supercell spawned three tornadoes southwest of Dodge City. This supercell didn't move for about an hour. It would've been a dream to chase (I wonder if anyone was out on that). Yet there is no component of wind greater than 20 kts anywhere at or below 500 mb! Amazing.

In terms of helicity, not terrible, but not something you'd look at and say "TORNADO!" However, there sure is plenty of instability. One supercell spawned three tornadoes southwest of Dodge City. This supercell didn't move for about an hour. It would've been a dream to chase (I wonder if anyone was out on that). Yet there is no component of wind greater than 20 kts anywhere at or below 500 mb! Amazing.