What is true about tornado activity ?

• Tornadoes have occurred in all 50 states, in all months of the year, and at all times of the day.
• The average life span of a tornado is only 7:30 minutes, but have been known to last over an hour.
• Tornadoes can strike without warning, and can move in ANY direction, especially from SW toward NE. They have been seen stationary and moving as fast as 60 mph.
• all of the above are true