What Are Those Things?

This afternoon while driving across the causeway separating the marsh pond and salt marsh section of the inlet, a stray pop up thunderstorm suddenly whipped up.

But as soon as it appeared, it blew away and within minutes it was all over.

I stopped the car, rolled down the window, and grabbed a quick blip with the phone while I had the chance.

Turns out those large, odd, grey and white things in the sky were clouds. 

We don't see clouds often enough where I remember what they look like when they do show up.