Hey!  You forgot the 260 quakes in Idaho! 

Now read this one:

https://www.wunderground.com/news/snow-cold-rockies-rain-thunder-plains-late-september-2016

What this most likely indicates is that the increasing moisture from the increasing evaporation cycle caused by the increased melting of the Arctic permafrost (and the attendant methane release) caused by our relentless assault on the atmosphere from our millions of crud-barfing gas gizmos (d-e-e-p breath) -  is pushing the precipitation in the mountains at 7,000 feet ahead a little each year.