"...Sailors have known for years to look specifically at the patterns and persistence of jet contrails for weather forcasting. If a jet is flying through air at an altitude with low humidity, the moist air from the jet engine might produce a slight, short-lived contrail. These short-lived contrails are a sign that the weather will be fair. A thick, long-lasting contrail indicates humid air high in the atmosphere, and can be an early sign of a storm.
"From SAIL Magazine's Sailing Tip of the Week:
Indicator: Skies
Continuing Good Weather: Clear, light blue to dark blue. Bright moon. Jet contrail disappear immediately or doesn't form.
Possible Change: Large halo circling moon or sun. Jet contrail lingers thickly befor falling apart."
//www.borderlands.com/contrails/contrail.htm
also (for balance...)
http://goodsky.homestead.com/files/index.html
//www.carnicom/contrails.htm {google: Chemtrails-Contrails}
Thanks Ebb..I didn't know that and it has been added to the bag of tricks;)
Whots happinin, Frank?!
:o A double-edge sword in this...
Photos of majestic Yosemite, marvelous Brice Canyon, mountainous green waves, shuttle pics of continental coastlines...
all natural treasures
with contrails criss-crossing the sky in each shot.
Merely an observation....