From just a few days ago...
We seldom hear these jets as they fly eastward bound above 30,000 feet. These flights leave the airports of central North America in the late afternoon so that they fly overnight and deliver their passengers to a rising sun and a new day in Europe or even beyond. It would have likely been a blue bird sky had it not been for the jet contrails spreading out beneath the stable layer of the tropopause. There were some gravity waves within the cirrus contrails giving away the presence of the stable layer. This was a Saturday and there were probably many more contrails than we normally see. The contrails also persisted for a long time indicating that the upper atmosphere was moist. This high humidity in the upper reaches was probably delivered by a still unseen warm conveyor belt. There was not yet enough moisture in the warm conveyor belt to produce cloud. The conveyor belt conceptual model revealed that a spring system was on the way even though we could not yet see any cloud.
This is a very rough panel. I had fun using a lot of paint to capture the clouds without all of the details.
This is a very rough panel. I had fun using a lot of paint to capture the clouds without all of the details.
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