cyclical, just like everything else, the whole CC narrative is to fear monger people into fleecing them out of money, I'm sure there were periods before recording started where there were little great winters and some stretches of great ones i have went through the data for winters since 32, when the nearest station to me began official obs, and until the mid 50s, it was mediocre, from the mid 50s to mid 60s, it's was prolific, then another lull, peaks and valleys, anomalous winters sure, but cyclical nonetheless