Our boat was firmly attached to the docks with triple lines. The docks failed. As far as I understand (we were never allowed to go to our boats or the marina) no boat came loose from its lines. The docks just failed and piled up the boats against the shoreline.
I was not aware that there was a tornado at the marina. Just a very large wave/surge.
According to the newspaper, the marina did not insure its interior docks.
There are some amazing aerial photos of the marina on the internet. I'll try to find one for y'all to see.
My insurance company declined the claim the next day after I notified them of the claim.
This is an interesting theory of recovery and could shift the risk of property loss (as opposed to liability loss for the circumstance when your boat's lines fail and it runs amok in the marina) to the boat owners who have boats in the slips.
Also, the marina may contract an obligation to move your boat for an impending storm, but that loss is a matter of contract liability, for which there is no insurance coverage.
This thing is a great law school exam question.