Now the last I checked my map, Phoenix wasn't along the east Coast. But, of course, that won't prevent the Branch Gorevidians from predicting how snow got to Arizona after the fact.
In fact, let's play a game and come up with a nonsensical reason to explain the phenomenon proving yet again how global warming exists.
As a result of cow flatulence in the plain states of Nebraska, Kansas, Oklahoma, the air currents rise above the current jet streams. As this stinky air rises, it provides sort of a buffer to the jet stream which gets nauseated by the smell.
The jet stream then reverses course and heads back to the West Coast where it hopes to avoid the stench of cow farts, taking with it all the cool moisture that would have been dumped on the plain states.
Given the length of the trip and the fact there are no good roadside rests along the way, the jet stream has no choice but to dump its cool liquid across the west coast.
And that my friends is how global warming causes snow in Phoenix.
Feel free to add your own in the comment section.
If it's good enough, the government will give you some money to prove it.