Tuesday, May 24, 2011

5/22/2011 - Eastern Iowa Supercells and DeKalb Storms

Summary: yet another Iowa disappointment with a late night redemption of run-of-the-mill convection over the NIU campus. Sunday appeared to have all the makings for isolated tornadic supercells across eastern Iowa; however, "wet" supercells with complicated storm interactions, as well as a plethora of multicells, provided a lackluster display of stormscapes. I latched onto a supercell or two between Des Moines and Iowa City, and was "treated" to a hazy view of a couple wall clouds that would quickly turn "shelfy".  Seeding was occurring on the northern storm, which made me target the southern of the two supercells. The storms, at least when I was viewing them, never had a good appearance. I followed the dominant of the supercells to the northeast of Iowa City, but had a hard time navigating into an area where I could get good, close visual. Once I did, it was dominated by outflow. Called it quits early and headed home for DeKalb to see my wife and child before his bedtime. I then ventured back out later that night to capture a few, largely unorganized, storms as they neared the NIU campus. I viewed a rather amazing display of shelfs and undulations under the backside of the shelf that made for an eerie evening sight. 


I've made a few animated gifs of the late evening show over DeKalb -- these include: shelf approaching, turbulent atmosphere I, turbulent atmosphere II.

 Wall cloud  transitioning into a shelf near Millersburg.

Back side of RFD shelf northeast of Iowa City.

Apocalyptic view of Davis Hall on the NIU campus. Animated gif of setting.

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