This is the second time that I know of that the Northern Lights descended this far south. On October 25 2011 they descended as far south as Alabama!
This is from Spaceweather.com. I like the 30 second clip because of the contrast of the wind turbines and the time lapse stars.
"NORTHERN LIGHTS OVER NEBRASKA: A solar wind stream is buffeting Earth's magnetic field, causing magnetic unrest and auroras at high latitudes. Last night faint Northern Lights descended all the way south to Nebraska. Click to view a movie of the display, photographed by Chris Allington of Crofton, NE:"