A few days ago, someone posted a blog post here on HN [1] explaining the phenomenon which causes this: https://www.severe-weather.eu/global-weather/polar-vortex-co...
https://en.wikipedia.org/wiki/Maunder_Minimum
I don’t know how climate change will affect this. But we might be in for an interesting few years.
It wasn’t a Maunder Minimum.
For the next 4 years or so we’ll proceed to maximum then back down to the next minimum thereafter.