On the day after Obama's great speech and McCain selected Palin as VP I will continue fall severe weather awareness talking about Nov 7th 1996 Low Cape/High Shear event which caused damaging and strong winds along with a series of F-2 tornadoes in Huntland TN in Franklin County.
A powerful polar front charged across Kentucky and TN on the day of November 7th 1996 and collided with a warm air mass with temps well into the mid to upper 60's. Instability wasn't get because of some cloudcover.
The tremedous shear of this November system and also the strong forcing along the Arctic front led to a narrow intense squall line. The shear and forcing allowed a supercell to form in Franklin county with 4 tornadoes touching down including an Ef2 tornado in Huntland TN. Altogether we learn that yes very low CAPE if enough forcing and shear is present can produce severe wx and even tornadoes.
You dont necessary need classic instability just some shear and forcing with a little instability big things can happen.
This line also caused an injury in McEven TN and caused some damage in Cadiz KY.
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