I think it may be easy to think of it this way. Mid Dec December to Mid March is 16 weeks. Over 10 years that's 160 weeks. Out of those 160 weeks I'd say we get 4-8 that match what you would consider the perfect pattern that deliver. The violtility produced from The change between patterns, good/bad also tend to be associated more with our bigger storms. Sent from my SM-G970U using Tapatalk