That's a bizarre one @freebeerfridays!

• I don't see it listed here...
  https://scijinks.gov/clouds/

Wowzer look at that!
We can stop looking up.
These are just normal...
Contrails

photo of white streaks of contrails in the sky

Contrails are made by high-flying jet airplanes. They are still clouds, though, because they are made of water droplets condensed from the water vapor in the exhaust of the jet engines.

Weather prediction: Contrails can provide information about the layers of moisture in the sky.

I don't remember those being taught when I was growing up.
Hmm Maybe it's just another Mandela Effect and I'm remembering wrong...