On January 3, 2002, I took my "journey" to Florida that was supposed to be on Delta. You can read all about it in my trip report posted here. Anyway, my DL flights to ATL and onward were cancelled due to the winter storm in the south. I was standing on the observation deck at CLE and I saw a DLX 737-200. I have never seen one at CLE before (at least of the DLX variety). I know they don't fly them here regularly, so it must have had something to do with the bad weather that day.