Here is a simple chart explaining the levels of tornado damage on the Fujita scale.

A map from 1898 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general distribution of rainfall in the region. The map shows areas of little or no rainfall to areas of heavy rainfall. The map...

A map from 1906 of North America showing the mean annual isotherms of the region given in degrees Fahrenheit. "The climate of North America naturally varies greatly, depending on latitude, the general atmospheric circulation or direction...

A map showing area precipitation and the direction and effects of wind currents on the African continent, including the desert regions in the trade wind and horse latitude belts, and the region of heavy rainfall in the belt of calms.

A map from 1910 of Africa showing area precipitation and the direction and effects of wind currents on the African continent, including the desert regions in the trade wind and horse latitude belts, and the region of heavy rainfall in...

A map from 1910 of the west coast of North America showing general mean annual rainfall patterns and the effect of the prevailing Westerlies and Trade Winds off the Pacific on rainfall. The map shows arid regions, and areas of light,...

A map from 1898 showing the heat belts in North America. The map gives the boundary isotherms of the hot belt as a mean temperature of 70 degrees Fahrenheit and the cold belt as a mean temperature of 30 degrees Fahrenheit, indicating the...

A map from 1901 showing mean annual rainfall in South America. The map shows the equatorial rain belt in July and in January, the direction of prevailing winds and their effect on rainfall patterns. The map shows regions ranging from...

A map from 1898 showing mean annual rainfall in South America. The map shows the equatorial rain belt in July and in January, the direction of prevailing winds and their effect on rainfall patterns. The map shows regions ranging from...