Tornadoes can occur just about anywhere in the U.S. but are most common on the Great Plains and in Florida.
Normally down the middle of North america, but they can form anywhere really.
Cumulus clouds don't so much appear in tornadoes. It is more accurate to say that tornadoes descend from cumulonimbus clouds.
Tornadoes happen in both hemispheres.
in storm lake
Tornadoes are produced by cumulonimbus clouds. Other clouds associated with tornadoes include wall clouds and funnel clouds.
Every state has had at least a few weak tornadoes.
The top five states with the most tornadoes are:TexasOklahomaKansasFloridaNebraska
No. Tornadoes do no glow at all. The sky before or during a tornado may appear greenish, though.
No part of Arizona is completely free of tornadoes, but they appear to be less common in the western part of the state.
Tornadoes can occur in almost any biome, but appear to be most common in grassland regions.
Tornadoes do not always appear black. The apparent color depends on lighting conditions and how much and what color of soil is being lifted. Many tornadoes appear dark because of perspective: the are lit from behind and are essentially silhouetted against the light source. The same tornado may appear lighter if viewed from a different angle. The storms that spawn tornadoes have very thick clouds that often making conditions appear very dark. The clouds themselves may be black. Some tornadoes may be black as they lift large amounts of black soil into the air.
There do not appear to be any reliable records of tornadoes spawned by the Galveston hurricane. There is a chance that the storm did produce tornadoes, but back in 1900 there was no system of record keeping for tornadoes as there is today.