Is it possible for a lenticular cloud to form under 1900 feet (over flat terrain) Under an overcast cloud laye

Question

and be as small as 40 feet in diameter? And then is it possible for it to suddenly shoot upwards, leaving a hole in the overcast layer above it?
I need an "experts" opinion only please.

that did'nt really address the question I asked..

Im asking if those 2 things can happen together, over a flat airport setting/terrain

Thanks for the answer UALog. I had a so called "expert" try to debunk the recent P'Hare UFO sighting as A: A lenticular cloud (about 40 foot in diameter) which suddenly took up vertically punching a whole in the cloud above.
As witness's described the incident, I found it hard to believe a lenticular cloud was capable of this.
I would be interested to know your credential's if any, so I can rub it in this "experts" face!
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Answer 1

By the details given and the definition of a lenticular cloud, I would say no.

By the official definition of a lenticular cloud, it is formed by the the airflow over a mountain or mountain range. Since the area is flat around the airport, any cloud that forms would not meet the definition of a lenticular cloud.

Answer 2

The sudden appearance of holes in overcast is usually caused by an aeroplane flying through a layer of cloud made of supercooled water. The agitation of the water droplets causes sudden freezing and the cloud changes its nature very quickly. It is spectacular when you see it happen.

Lenticular cloud can form over flat terrain downwind from a range of hills or mountains. The waves produced by stable air moving across the mountains can be seen 100km away from the hills.