Pasayten's Methow Valley Bulletin Board

Ray I've been laughing at that for some time.

I always get a chuckle at many in the Valley think contrails are "chemtrails"... Like big brother is flying over and poisoning us...

WHY AIRPLANES LEAVE TRAILS IN THE SKY ???

Airplanes leave trails in the sky, known as contrails (short for condensation trails), due to the water vapor in their exhaust. When the hot, humid air from the engines mixes with the cold, low-pressure atmosphere at high altitudes, the water vapor condenses and freezes into tiny ice crystals, forming visible white streaks. These trails can persist and spread out, depending on atmospheric conditions like humidity and temperature.