northstar.com is a website with all sorts of broadcasting information in the Upper Midwest.
They also have a TV captures section.
Now, what does this have to do with The Weather Channel!? Well, in Willmar, Minnesota, there's a UHF cable system (cable channels over-the-air). (They also have something like that in Duncan, Arizona.)
K34HO carries The Weather Channel and is its only actual TV station (not owned by it, obviously).
Anyways...
http://www.northpine.com/broadcast/captures/mn/k34ho.htmlI found that today. It's DX shots of K34HO from June 2007, and right during the Local Forecast, too!
I think it's an undiscovered 4000, but given that it's Chazz country, he might have found it first. But I don't think anyone's seen IMAGES of that 4000.
Of course, two years have gone by, but considering how this puppy works, I'd think it's still there. 20 years and we have 4000s still cranking out graphics.