Ha...Ya know, we talk about the 70s and the lack of snow...look at this:
1,2,3,4, FIVE Ninas in the 70s...lol Sweet mercy! And in after the first two back-to-back ninas, ya get a break...except it's the big Super Niño of 1972-73 that completely overwhelmed everything and produced almost nothing. So that's 6 winters of the 70s right there! Would explain a lot...lol