Wind Speed Notes From Mythbuster Testing Using Aircraft Jet Backwash

F-5 tornado 250 miles per hr or more
F-3 tornado 135 miles per hr or more

130 miles/hr blown off feet and are unable to stand back up.
Tested a backpack of 1/8 thick aluminum plated made into a kind of sleeping bag form 
that one can lay down in.  It was tested up to 180 miles/hr or can withstand a F-4.

If one anchors down a car and blocks off the wind so it will not go under it like one of the 
mobile tornado chase vehicles as tested then it could withstand up to F-5 tornado force 
winds as tested.  

Bottom line: If one is below ground level and the protection is parallel or nearly parallel 
to the wind direction or the surface of the ground then it need not be made of thick 
material. Metal is preferable so it will not burn.  Say 10 gauge or thicker if steel.  It does 
need to be well anchored on all sides so the wind does not get under it. 

Almost any object not anchored down will move along the ground at a wind speed of
around 200 miles per hour.  Use natural protection of hills and the environment to help 
cut down the wind at where you wish to ride out the pole shift. 
