If it’s temporary enough not to require pressurization and decompression, then it’s not worth the effort to submerge.
By the time you close, dive, wait, rise back up, you’re talking hours, even days, not some 15 minutes drop to the bottom of a pond.
At least look at the PADI time tables and study the process, so you have some concept of what you’re trying to consider. We’re not talking about putting storm shutters on, inflating a few seals and weathering a storm here. You specifically said a removable dome and submerging to wait out the storm. I’m being realistic, here, not trying to be difficult.