Anyone have any idea what wind speed it takes to blow over a colony (2 deeps and perhaps 1 medium super)?

Just in case Gustav will be knocking on our door Tuesday as a hurricane here in south Louisiana as the National Hurricane Center models seem to suggest, I am planning Sunday to strap down all my colonies, running the strap through the cinder block hive stand and around the colony. Going to put some heavier bricks on top too. Will also do some praying this keeps the hives upright.

I haven't opened the hives for about a month when I pulled honey supers and applied Apistan strips for the mites. I hope this has provided sufficient time for the critters to apply a good propolis seal between the boxes.

Any suggestions?