We had 85-90 degree days the first week of October in 2010. September 2010 was the second hottest and second driest on record, and wasn't the first only because of a front that came in the 29th. Since I came to work in the region in 2001, we have had two normal snow years (2008, 2009), one much higher than normal year (this year), one year that wound up near normal only because May and June were cold and wet (2010), and the rest were substantially hotter and drier than normal, often with 90-degree days in late May and catastrophically warm/low flows on some rivers like the Firehole, where there have been a couple fish kills due to thermal stress in my time here. These hot/dry years and rapid shifts in weather are generally what the models predict for the northern Rockies due to global warming.
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