"As the polar vortex became more and more visible, we noticed it had hexagonal edges, and realised that we were seeing the pre-existing hexagon at much higher altitudes than previously thought."

It towered hundreds of kilometres over the clouds, and showed quite different behaviour from the southern vortex. It's cooler, not as mature, and, of course, the south pole has no hexagon. But since wind conditions change dramatically with altitude, the fact that the hexagon shape persists so much higher than the cloud tops is a baffling conundrum."

https://www.sciencealert.com/saturn-hexagon-jet-stream-towering-high-into-stratosphere-north-pole

(http://www.autoadmit.com/thread.php?thread_id=4349849&forum_id=2#38878035)

"NASA's Cassini spacecraft has seen something never before seen on another planet -- a hurricane-like storm at Saturn's south pole with a well-developed eye, ringed by towering clouds.

The "hurricane" spans a dark area inside a thick, brighter ring of clouds. It is approximately 8,000 kilometers (5,000 miles) across, or two thirds the diameter of Earth.

"It looks like a hurricane, but it doesn't behave like a hurricane," said Dr. Andrew Ingersoll, a member of Cassini's imaging team at the California Institute of Technology, Pasadena. "Whatever it is, we're going to focus on the eye of this storm and find out why it's there."

https://www.jpl.nasa.gov/news/news.php?release=2006-137

(http://www.autoadmit.com/thread.php?thread_id=4349849&forum_id=2#38878310)