Interesting sunrise contrail, not sunset like most of this type of thing. Less commonly observed, mostly because people are still in bed. Here the contrail develops in sections as it passes through bands of moisture. You can see those bands of moisture reflected somewhat in the bands of cloud (although the clouds are probably not at the exact same altitude).
The biggest misconception with this type of thing is that it's fly "vertically" (like, straight down). It's not, it's just flying in a way so that the contrail is lined up with the camera. For more on this illusion, see:
Arizona is in the MST time zone (no summer time), that is UTC-7, so this is 1300 to 1400 UTC on 9/19/2015. Without a precise time it's hard to say which plane it was. At around that time there's three FedEx planes playing over Snowflake heading east. FDX806 was the highest at 37,000 to 39,000ft, and this seems like the most likely candidate. It's a twin engined 777, quite a large plane, which matches the visual appearance of the contrail quite well (although I would not entirely rule out a trijet).
One thing to remember when looking at contrails like this, with the forced perspective, is that the angle of the trail doe not indicate the direction of travel, as it will usually be blown from it by the wind, and the perspective greatly magnifies this effect. It looks like the viewer is to the south of the trail (which is descending to the east), but Snowflake itself is actually to the North of the GPS track (attached).