Flight often have jet contrails–that is, the white vapor that follows the plane when it takes off.
But did you know these trails can tell you information about the weather?
Yesterday, I wrote about a team of pilots that
used their contrails to make made an angel--which was pretty cool. But what does the usual contrail mean?
Did you know they could be used to predict the weather. A thin, shorter tail indicates low humidity and fair weather. A thick, longer lasting tail signifies the early indication of a storm.
The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas. The water vapor contained in the jet exhaust condenses and may freeze, and this mixing process forms a cloud very similar to the one your hot breath makes on a cold day.
For some more specifics about how the weather affects the contrails, check out this article. It’s pretty cool!