Hail does not depend on a tornado. Hail forms in thunderstorms with strong updrafts and turbulence. Many of these storms are not even capable of producing tornadoes as they have a strong enough updraft, but not enough rotation for tornadoes.
Tornadoes are often but not always accompanied by hail. However, the hail is not a result of the tornado itself but the storm that produces the tornado.
It can. Hail often does come before a tornado, but most storms that produce hail do not produce tornadoes.
No, if there is a tornado or hail near a window is one of the least safe places to be.
No, the presence of hail does not necessarily indicate that a tornado is imminent. While hail can be associated with severe thunderstorms that may produce tornadoes, it is not a definitive indicator of an imminent tornado.
Often, but not always.
Yes. The storm that produced the Joplin tornado also produced hail up to 1 inch in diameter in the Joplin area.
Hail most often occurs ahead of the tornado but it also frequently found in the hook of the storm, which wraps around behind and to the left of the tornado (with respect to its movement) in the northern hemisphere and to the right of it in the southern hemisphere.
Yes. Tornadoes a very often accompanied by large hail.
No. Hail stones are caused by rising air in thunderstorms that blows rain upward to the height of the atmosphere in which temperatures are freezing. Many tornado producing storms have strong updrafts and also produce hail---but you can have hail without a tornado and likewise you can have a tornado without any hail.
A Tornado is usually accompanied by severe thunder storms and possibly hail
Hail
6.75 inch.