Weather and Clouds

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Negative contrail where an airplane caused the cloud to condensate out...

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Hole punch cloud

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September 30, 2007

It's pretty bad how obscuring contrails have become. "Explosive growth" and "exponential growth" are terms that adequately describe their propagation when the conditions are just right.

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Image of a swath of contrails
Larger image of Growing Contrail swath
Expanding Contrails - Feb 27, 2005

As the planes traversed a specific area of the sky early on February 27th, the contrails sheared and expanded into a visible swath of cloud cover. I guess the temperature and humidity were "just right" in this area for explosive growth of clouds. Does this indicate significant condensation nuclei is dumped in jet exhaust? What is the impact of this unintentional man made weather modification?

Look at this Satellite Image
Check out this contrail clutter over Georgia Oct 2004.

Contrail Halo
January 15, 2005

Another Contrail Halo image
January 15, 2005

22 Degree Halo
December 3, 2004
Image of a 22 degree halo
Image of a 22 Degree Halo

Mammatus clouds