Message posted by Brian Liddicoat on May 23, 2010 at 5:42:41 PST:

That's interesting: I didn't know that atmospheric subsidence was the cause of "donuts on a rope", but it is indeed pretty common: a commercial jet contrail over my California home displayed donuts-on-a-rope just yesterday afternoon: I've seen it many times.

In Reply to: Re: Contrails over LV- thought I'd share posted by Peter Merlin on May 22, 2010 at 20:46:15 PST:

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