Why then? Why not 1960, 1980, 2000, 2014????
It's hard to contribute how much of an enhancement AGW brings. But it doesn't hurt matters when SSTS off the Eastern CONUS sea board and curling North.
On the flip side there was a system a couple weeks ago that came right up that area of 1.5 to 3C+ ssta West of Mexico turned into a closed low and spun copious moisture into the CONUS. It was the storm Chicago got like 20".