GEOLOGY

Detailed explanation-1: -The fierce storms can happen at any time of year but are most common in May and June in North America, when atmospheric conditions tend to be most right for their formation. Tornadoes remain deadly and relatively unpredictable, despite recent advancements in weather science.

Detailed explanation-2: -Features. A tornado is a swirling vortex or column of air with a hollow core. The circulating air often contains debris and dust and moves in an upward spiral at high speeds. The bottom of the tornado column makes contact with the ground, while the top of the tornado can extend 5 or more miles into the sky.

Detailed explanation-3: -Formation Ingredients The key atmospheric ingredients that lead to tornado potential are instability-warm moist air near the ground, with cooler dry air aloft and wind shear-a change in wind speed and/or direction with height.

Detailed explanation-4: -Almost all tornadoes occur at the rear portion of a severe thunderstorm complex. In northeast-moving storms (the most common motion), the rear portion is at the southwest extremity of the storm.