Thanks to Brandon Harris of Jacksonville for these images… he writes:
“On my drive in, I noticed some interesting cloud formations near the
airport. They look kind of like roll clouds, but I think those are usually
accompanied by severe weather. Maybe the striations in the clouds are
being caused by high winds up there? At any rate…it was a cool sky this
morning.
Thanks!!”
In response to Brandon’s question… they are not roll clouds; those are indeed associated with strong to severe thunderstorms. The clouds have that kind of texture today mainly because of the very cold air aloft… sounding data shows that the temperature at 10,000 feet today is 16 degrees (F), and -3 degrees (F) at 18,000 feet over Alabama. All ice!