Not for nothing, if this winter turns out snowy and cold it’s a good omen for the next two winters as well. Volcanic forcing doesn’t erode in a year. But it’s also not all encompassing and can be offset by other unfavorable factors, of course. It’s more another piece of the puzzle.
With the recent paper showing the underestimation of sulfur released in that eruption combined with latest assessment of its size, there’s a very good chance it has a hand in what’s going on. It was as big or even bigger than Pinatubo, just with a different aerosol profile.
Because I’m a giga geology nerd, one last factoid about HTHH: they recently discovered evidence for underwater pyroclastic flows reaching 80km away from the caldera! That’s absolutely insane.