Quote:
Originally Posted by JayUtah
anyway riddle me this, usually the contrails dissipate within minutes of the aircrafts passing yet these ones not only do not dissipate but spread.
Atmospheric conditions. Contrails will either dissipate or not depending on them. Atmospheric pressure and temperature vary with altitude, time, and weather zones.
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I can generally tell by looking at the clouds that are around whether a contrail will persist or disapate. Most of the time I am right.