Hermine has been wreaking havoc on the TX country side. Causing major flooding all over central to northern TX. A recent threat however has come in the form of tornadic supercells. Mini supercells that is. Fast moving storms, that are not very tall or wide. But tight and able to spawn tornadoes due to the presence of instability and wind shear. As this once tropical system interacts with the jet stream or westerlies. It is encountering dynamics that are mostly inherent in extra tropical systems. Meaning it is transforming into a somewhat powerful extratropical cyclone. Stronger upper level winds are now interacting with the low level winds causing some significant wind shear, on the order of 300m/s SRH!
Above images of 500mb wind speeds, and Storm relative helicity. Showing enviroment capable of tornadoes! Below is a video shot from some height. Its great in that it shows the circulation on the ground look closely!
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