For the strongest tornadoes, reinforced high-quality concrete is your best chance, though it is ultimately best to be underground.
I'd say that fiberglass is the best. FEMA even recommends using fiberglass storm shelters because they provide the best protection even from tornadoes. Aside from the superior protection, they are also comfortable and durable.
Tornadoes do cause some soil erosion, though it is rarely significant. Eroded material must eventually by deposited, but this does not occur by any mechanism directly related to tornadoes.
They don't really. Tornadoes are an erosive force, though significant erosion is rare. The soil or sediment picked up by a tornadoes does eventually get deposited, as does all eroded material, but not as a direct result of any process from the tornado itself.
Cotton is the best material
Worldwide statistics are not available as most countries do not keep records of tornadoes. The U.S. shich generally has the best records, had a record 1,817confirmed tornadoes in 2004.
It just so happens that the best climate for producing tornadoes is the type in which grasslands develop. Many tornadoes have also touched down in forests as well.
nylon is the best material for a kite or silk.
Tornadoes do not have names. Some tornadoes are referred to by where they hit (e.g. the Oklahoma City tornado), but that is not a name. Accurate worldwide records are not available, but the United States, which keeps the best tornado records, experiences about 1,200 tornadoes in an average year.
The best material is NOT!!! plastic its news paper!!
The best material is copper of alumninium.
The highest incidence of tornadoes in Hawaii appears to be in the months of January-March. However, tornadoes in Hawaii are extremely rare, so there really is no good time to see them.
Water tornadoes, properly called waterspouts, form best when the water temperature is higher than the air temperature.