The United States averages about 1200 tornadoes per year, which would work out to about 3600 tornadoes in an average 3-year period.
The types of tornadoes are Weak, Strong, and Violent (3)
Since records began in 1950 there have been 157 confirmed tornadoes in Massachusetts. However, in the early part of this period many of the weaker tornadoes were missed, so the actual number of tornadoes is probably significantly higher.
The peak 3 months for tornadoes in Texas are April, May, and June.
Tornadoes are sometimes divided into "weak" tornadoes "strong" and "violent" tornadoes. Weak tornadoes are those rated EF0 and EF1. Most tornadoes are weak. Strong tornadoes are those rated EF2 and EF3. Violent tornadoes are those rated EF4 and EF5. They are the rarest of tornadoes, only about 1% of tornadoes are this strong.
There were 1,098 confirmed tornadoes in the United States in 2007.
Tornadoes are not an annual occurrence in New Hampshire. On average it gets about 3 tornadoes every 4 years.
So far there have been no tornadoes recorded in Alaska in 2011. In the past 60 years the state has only has 3 recorded tornadoes. All rated F0.
In the years 1950-2011 Kansas had 161 confirmed F3 and EF3 tornadoes. Records prior to 1950 are incomplete.
The types of tornadoes are Weak, Strong, and Violent (3)
3 years
Louis Riel was in the US for 3 years
well they have about 3 tornadoes each year
No. Intense tornadoes (those rated EF3 or higher) only account for about 3% of tornadoes in the U.S. Most tornadoes are rated as weak, EF0 or EF1.
earthquakes, hurricanes, tornadoes
There were 148 tornadoes on those dates.
Tornadoes are a rare occurrence in New Hampshire, averaging about 3 every 4 years in the state
Moore, Oklahoma has had 6 tornadoes in the past 10 years: 3 on May 10, 2010; 1 on May 24, 2011; 1 on May 20, 2013; and 1 on May 31, 2013