Air Compressor Size

[waste]

I have a 20 x 40 IG vinyl pool in Omaha Nebraska (very cold winters). After reading this forum for a while, I decided I would start closing the pool myself. I would like to know from the people that close their own pools as to what size air compressors they use to blow out the lines.
Thanks in advance for your help.

See how easy that was ?
(FYI- psteward pm'd a similar ? to me the other day, as I don't use a compressor to blow the lines I suggested he ask the forum)