heard a case between Oklahoma and Texas this week. Earlier this year, Texas filed another Supreme Court case against New Mexico.
draft 2013 report to Congress. This figure shows changes in winter and spring precipitation for later this century under a continued high CO2 emissions scenario (you should be able to "View Image" or similar in your browser to see a larger image). Blue-green colors indicate increased precipitation, brown shades decreased precipitation, with darker colors indicating greater changes. Colorado sits roughly in the area where the changes come together -- increased precipitation in the north, decreased in the south, the same sort of pattern that we're seeing in this year's snow pack.
The similarity of the maps is probably just a coincidence.