It is impossible to say; tornadoes have been occurring there since before anyone was around to record them. It is likely they have been occurring there since the land that would become Washington first formed.
Tornadoes happen in most parts of Washington. Most appear to be scattered across the eastern half of the state but the highest concentration appears to be concentrated in a relatively narrow band between the Cascades and the Olympic Mountains and Pacific. Part of this is a result of population density; a tornadothat occurs in a sparsely populated area stands a fair chance of never being reported.
Tornadoes, Hurricanes, Tsunamis, Drought, Earthquakes, and Whirlwinds are all natural disasters the happen on Earth. (Whirlwinds and Tornadoes are basically the same thing)
Tornadoes appear to be most common in the eastern and central portions of North Carolina.
A tornado and a hurricane cannot "combine" as they operate on different scales. It is fairly common for tornadoes to produce tornadoes.
It is extremely rare for four tornadoes to occur simultaneously in the same area. Tornadoes typically form from separate thunderstorms and are usually isolated events. Multiple tornadoes can occur in quick succession or in the same general area, but having four at the same time is highly unlikely.
It can, but very rarely.
Tornadoes can happen in any place that gets thunderstorms.
Tornadoes happen in Miami for the same reason they happen anywhere else. See the related question for how tornadoes form in general.
Tornadoes can happen in Ottawa. Canada does get tornadoes, though not as often as the U.S. due to its cooler climate.
Tornadoes can happen anywhere in the world except cold areas like Antarctica and the north pole. Tornadoes are mostly common in United States.
Yes. Tornadoes, including some significant ones, can and do happen the the Philippines.
Tornadoes happen in the summer every year.
Most tornadoes in the U.S. happen in spring and early summer.
Tornadoes can happen anywhere - they're usually formed from severe thunderstorms.
Sicily Tornadoes happened in 1851.
well tornadoes can happen anywhere any time so yes
Tornadoes happen in all seasons but are most common in the spring.