Tornadoes, like lightning, never strike twice. Guy, Arkansas has been hit 3 times by a tornado damaging the same church each time. Reported tornadoes are increasing in frequency. Annual tornado deaths are decreasing in number. Early on in the data record it was true, but during the last decade the fatality rate has leveled off and stopped decreasing.
Tornadoes can rotate clockwise as well as anti-clockwise.
Most tornadoes are the large size that you see on the evening news. Open windows will NOT equalize the air pressure if a tornado strikes. Damage is caused by wind gusts and flying debris. Tornadic thunderstorms produce an above average amount of lightning and and a larger than normal amount of hail compared to non-tornadic thunderstorms. Doppler radar will observe ALL tornadoes.