The one time I've seen real, no kidding, windshear, as a line of garbage and dust swept across the airport, a MD88 crew reported an X0 knot gain on landing roll out. I sure remember they said "eighty" but I wouldn't swear to it.

My first officer and I had already been preparing for the go around. The report from the Delta pilot ahead was good information ... we asked for a non standard missed to remain as clear as we could. He was off to ground before we could say thanks for the PIREP. It is good that PIREPS are a part of Delta's windshear training.