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Originally posted by GenRadek
reply to post by BoboIsBlue
I'll give you the sounding data for central IL from Jan. 1 through today.
Try it yourself and see if the weather was conducive for contrail production.
Originally posted by GenRadek
reply to post by BoboIsBlue
Well right now, in Chicago, its a crystal clear blue sky. No clouds or contrails.
Are you using the Mid-lat winter temp profile chart?
Did you go through the altitudes as well and the corresponding pressures? Maybe the planes were flying in the wrong air level. .