Note: #5 Epoxy MUST be used for TargetÂ® Stair Tread installations Note: For Tread nosing, see #10 Epoxy Stair Nosing Caulk below DIRECTIONS: 1  Be sure the substrate is clean, dry and smooth. 2  Stair Treads and Risers should be pre-cut side to side and front to back before spreading any adhesive. 3  Pour equal amounts of part âBâ into part âAâ and mix ...
Tornadoes often develop from a class of thunderstorms known as supercells. Supercells contain mesocyclones, an area of organized rotation a few miles up in the atmosphere, usually 1â6 miles (2â10 km) across. Most intense tornadoes (EF3 to EF5 on the Enhanced Fujita Scale) develop from supercells.
Tornadoes form under a certain set of weather conditions in which three very different types of air come together in a certain way. Near the ground lies a layer of warm and humid air, along with strong south winds. Colder air and strong west or southwest winds lie in the upper atmosphere.