Hurricanes and tornados are two different phenomena, entirely.

A Category 5 hurricane generally has wind speeds less than 200 mph.

EF5 tornadoes start at 200 mph, and can be well over 300 mph.

Could you design a warehouse (note: not a small storm shelter, but a warehouse, which by definition needs to have very large interior open spaces) that would withstand a 300 mph wind? Maybe.

The budget would be well beyond the reach of any non-military client, though.