Gathering Gloom

The sky to the northwest was darkening just after 5:00 PM, on Tuesday, May 28, 2013 as seen above from the Four Corners BP truck stop at the Highway 218 Exit 66 just east of Ainsworth, Iowa. Also shown above is a corresponding radar capture of this moment with the location and direction of sight included. This was the furthest extent of my storm  "chase" which originated from Cedar Rapids, 50 miles to the north. This system would in less than a half-hour turn severe. 

The image shown just above looks southwest on my return drive north. It looks over Menard's along Highway 218 just north of the Highway 1 intersection around 5:52 PM at the edge of the storm.