Topic: what do you call this

[Beaudog]

OK it is not as clear as it was when I started out. I had to go get a camera, get a glass of wine, bull with the wife so it kinda got away.     But what do you call this when the clouds appear to be setting on a layer of air where the bottom of the clouds appears to be flat.   I know it is not exactly there anymore but when I first looked all of the clouds had almost perfect flat bottoms  and appeared to be rising at the tops.  I know the bottoms are not flat anymore, took to long to get the photo.

[miraculon]

Your photo looks similar to the L1 "Cumulus Humilis"  according to my old Cloud Code Chart.

Greg H.

[W3DRM]

Don't know what they are called but here in the Carson Valley we get temperature inversions and the clouds have a very distinct flat base right at the inversion level. I'll try to get a photo the next time it happens which is normally in the winter months.

[ValentineWeather]

The flat bottom of clouds in this photo of cumulus clouds is the condensation point, usually its horizontally uniform across the area per this article. http://www.wrh.noaa.gov/fgz/science/flatcloud.php?wfo=fgz