A lady was telling me that the lower clouds were contrails left from plane exhausts. I looked up and there were none I could see in the sky she pointed to Stratocumulus Clouds. I did not want to tell here she is wrong because planes don't cruise that low, but it did make me think.

Can contrails and/or sound coming from the engines create clouds or rain early if the conditions are right?

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    $\begingroup$ This would be an interesting question that I don't think is directly answered by other questions on the site, if it were refocused to ask about the effects of contrails - i.e., the legitimate phenomenon that's related to aircraft engines, rather than the idea of "chemtrails" which open up a whole world of conspiracy nonsense (see earthscience.stackexchange.com/questions/3009/…) $\endgroup$
    – dplmmr
    May 4, 2019 at 4:20
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    $\begingroup$ I'm going to edit in contrails for chem trails. "Chem trails" is a crackpot concept. The effects of contrails on cloudiness is not. If the OP wants to revert my edit, fine ... but I'll vote to close on the basis of crackpottery. $\endgroup$ May 4, 2019 at 16:51
  • $\begingroup$ @DavidHammen thanks. Exhaust fumes and the plane possibly releasing sewage was the only chemicals I was thinking of. $\endgroup$
    – Muze
    May 4, 2019 at 18:16
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    $\begingroup$ The correct spelling is "contrail," not "con trail," at least according to Webster. $\endgroup$
    – BillDOe
    May 5, 2019 at 0:01
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    $\begingroup$ @AndersSandberg But Lightning follows shipping lanes. $\endgroup$ May 6, 2019 at 1:48


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