In this video I explain how you can see if persistent contrails are physically possible to form – or whether the persistent contrails you see are artificially nucleated. Here’s a link to the Wyoming Soundings.

One Comment

  • Hi Patrick,

    This video was shared via a group I am part of as we’re discussing the importance of taking into account various atmospheric conditions when making observations. You say above that in this video you will explain how to see if persistent contrails are physically possible to form but you only mention that the relative humidity has to be way way over 100% RH for a contrail to form.

    Could you please explain exactly what factors you take into account when determining whether what you see is a contrail or a chemtrail?

    Cheers,

    Glen.

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