I'd say they were going for Alco 244 smoke but it just wasn't dense enough... the poor things tried with all their might...
Very impressive! Was there much humidity? If there was, I wonder if some of that exhaust was possibly a bit of steam?
Naw, was dry here, as usual in the winter. Caught another one, but this one was just noisy. Sounded like a failing 'test cock' on one cylinder, if they still have those on these new diesels. And then this cold one turned interesting, over at Wibaux.
Sometimes you just have to go get a train, no matter the temp! The fingers were a might chilled after this video!