A tornado shelter typically ranges in size between that of a large closet and a small office.
It is usually called a tornado shelter. It may be called a storm cellar if it is underground.
Tornado shelter is the term used. If the shelter is underground then the term storm cellar may also apply.
It is best to take shelter from a tornado than to try to outrun it. If you are in a vehicle with no access to shelter and the tornado is distant it is best to drive perpendicular to the tornado's path in order to get out of its way.
It is recommended to seek shelter in the basement during a tornado. If you are specifically referring to taking cover in the basement during a tornado, it can be simply called a tornado shelter.
It depends on the shelter. Though most are safe for anything but an EF5 tornado, which is extremely rare.
If you are outside with no shelter a available and a tornado is coming the best option is to lie in a ditch or depression in the ground
Tornado
a shelter
The safest place in a tornado is a basement or underground storm shelter. If no underground shelter is available the best shelter is a central room away from windows on the lowest story of a house.
If a tornado is approaching and you are in a car abandon the vehicle and seek shelter is a sturdy building. If no shelter is available lie in a ditch or culvert.
We sat very quietly in the tornado shelter until the danger had passed.
No. You do not need to take shelter during a tornado watch. You take shelter if a tornado warning is issued. If you are in a closet shelter you should close the door; it may not provide adequate protection otherwise.