Tornadoes in the United States
The Midwestern states are very prone to tornado activity, as they are part of "Tornado Alley." States included in the area that are hit by tornadoes the most are Oklahoma, Kansas, Missouri, Nebraska, Iowa, and South Dakota. The Midwestern States are often hit by tornadoes during the late spring and early summer months, especially the months of May and June. This is due to the aforementioned air mass moving northward into the Midwest and combining with another air mass that move southward from Canada. This creates unstable air, creating the potential for storms to strike the most during these months. The frequency begins to decrease in the middle of the summer, as the air mass moves northward into the Great Lakes states.
Estelline, Texas
According to the Köppen Climate Classification system, Estelline has a semi-arid climate, abbreviated "BSk" on climate maps.
Estelline, Texas is often referred to as being located at the core of Tornado Alley. Over the years, the location(s) of Tornado Alley have not been clearly defined. No official definition of 'tornado alley' or the geographical area of tornado alley has ever been designated by the National Weather Service Thus, differences of location are the result of the different criteria used.