In message , Edward Erbeck
writes

Now look at the Top of the Center Cell. It has reached a level of
Moisture and is Condensing it into "Fog".


Wow, those are good! I've run out of superlatives.
Am I right that you don't mind if people save them? My office PC needs
new wallpaper.

The wispy bit's a separate cloud like a cap cloud on a mountain, where
the normal airflow has to rise over the top of the storm. They're quite
common on thunderheads in humid climates like here.

--
Sue ]