While I understand using the last 20 years for the average, I don't agree. My argument is that a record cold temperature utilizes all the years, while the average temperature only encompasses the past 20 years. Another definition difficult to swallow is the definition of a blizzard. At some point, "they" dropped the temperature condition. "They" also point out that it doesn't have to be snowing to have blizzard conditions. I totally disagree. A blizzard should have snowfall rates in the definition. Living in New Jersey, I realize I never had to put up with sustained blowing and drifting snow like in the upper Midwest. Those conditions should have a whole term denoted onto itself.