How to pronounce “vortices” in English

Their unique shape creates the same swirling vortices above the seed's leading edge,

So you can see how they developed VORTICES out of their name.

But we had the polar vortexes coming through here, vortices coming through here.

What they're doing is generating swirls of air above the top of the wing, and those vortices create low-pressure zones.

The vortices off the wing's very obvious.