Overcast days and Convective Clouds 2.
Towers go up. These are so called...Not to Worry about Clouds ;) They are white and if
you look quickly, they
do not look too ominous. In fact these are Cumulus Congestus clouds and
they are just a few minutes away from advancing to a Thunderstorm stage.
This baby didn't look too strong and I guess it wasn't. Still it had a distinctive
rotation going on under the updraft base, but (of course) there was no visible wall cloud or tornado.