Since I live in a log home, I've often wondered how it would fare in a direct hit by a tornado.
Here is a good study of what might happen. Wynnewood is the same style log house as mine - squared cedar logs with dovetail joints from the same era. The caretakers were in the house during the storm and survived without injury.
This was a direct hit that occured during the Feb 5, '08 tornado outbreak. Notice the mature cedar tree that was ripped away. As you can see, the roof and half of the second story were taken, but all of the first story walls remained intact. (the lower pic shows more of the house. Use the breezeway and stairs as a reference for comparison. The second story from the breezeway and left is gone)
This great loss of a piece of TN history I hope will eventually be restored. Wynnewood is in Castalian Springs and is on the register of National Historic Landmarks. It was built in 1828 and is the largest log structure in Tennessee. It stretches 142 feet in length. It was a stage coach inn on the Nashville-Knoxville Road. It is owned by the state of Tennessee and operated as a museum.
I think the old log house did ok considering neighboring houses were flattened and 8 people were killed in Castalian Springs. It kept the inhabitants safe and wasn't flattened. I assume this old cabin is like mine with concrete chinking. Not as tight as the modern synthetic permachink, but probably more structurally stout. That is what may have saved some of those walls. Of course my log house is only 3500' sq ft - not nearly as large as Wynnewood.
This tornado was the single deadliest tornado to strike Middle Tennessee in over 75 years. The National Weather Service confirmed that the 22 deaths were caused by this tornado, which was rated as an EF3. The tornado path was 51 miles long and up to 0.75 mile wide. It passed about 40 miles north of where I live.