Can they see the aurora borealis in Aurora, Colorado?
Sometimes, but the folks in the higher latitudes in Canada, Washington, Idaho, Montana, North Dakota, and Illinois are more likely to see auroras than those in the lower latitudes. Cloud coverage will lessen the chance, so during these frigid blizzards, the chances of seeing an aurora are almost nil. Last night, those in Norway enjoyed seeing auroras but those in the USA had clouds so they could not see them. I wonder if Canada spotted any?
Once I saw an aurora that was an unusual reddish hue that is normally not seen after the sunset hours here in Los Angeles when we had some major X-Class storms in 2011 and 2012. During that same time frame, folks in Arizona were able to capture this red aurora on time-lapsed photography. However, here in the lower latitudes, we do not get the spectacular swirls which one sees in Norway and even in Alaska. Again, only if one were to know when and where to look, would one find auroras here in the lower latitudes.
Here is an aurora from Northern Norway taken early this morning, Jan. 10, 2014
However, the poster made a slight mistake: posted "September 1, 2014" -- which in the future).