Mother Nature and Man Put on Spectacular Show in the Sky

contrails one
NBCLA

If you looked at the western sky as the sun set over Southern California Monday you might have seen a spectacular show of contrails.

"When it's humid at higher altitudes contrails remain visible in the sky longer. Spectacular contrails today - like a tic-tac-toe board!" Ian Gregor, Communications Manager, FAA Western-Pacific Region told NBCLA in an e-mail.

Contrails (short for "condensation trails") are artificial clouds that are the visible trails of condensed water vapor made by the exhaust of aircraft engines.

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