Just a question for the experts? With Harvey, 93L any other TC out there, can Powerful TC pull the troughs deeper and sharper with much cooler air? Idk i was always told that TC can help set stage for a good Fall/winter.
This is wholly unscientific,
and I am no expert, as we all know, but ...
First, there are so many variables that go into making a winter. We've seen it very cold with a +NAO and with a -PNA and with ...; and we've seen it warm with a -NAO, +PNA, etc. So, I suggest, one variable does not a winter make. And that observation/theorem would, I propose, goes to T/Cs impacting winter in a given year.
Second, take a look at last winter with Hermine and Matthew squarely affecting us in the SE; what did that buy? Rhetorical question, perhaps.
I ran composites on the winters after Cleo (much like Matthew), Kate (much like Hermine), Katrina (similar in ways to Harvey, I suppose), and also blended Cleo (1964) and Kate (1985) {just to see where that might lead}, and all the results with T/C's being the
only variable show nothing but "normal". Remember, of course, that 1964, 1985, 2005, and last year, all had many drivers impacting winter's eventual unfolding and outcome.
Here's the composites, for what little they are worth:
Cleo -
Kate -
Katrina -
Cleo and Kate combined -
Bottom line - there are far more forces at work than a T/C needed to make a good winter ...
Just my 2¢