Don, although it's not going to happen this year, I always consider 4/20 the end of measurable snowfall season because that's the latest we've had that (in 1983). Three measurable snowfalls this late include 4/10/1996 (4-5 inches), 4/16/2014 (0.5-1 inch), 4/20/1983 (1.5-2 inches)