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.
Thunderstorms are most likely to form when the temperature of the air decreases with height pretty rapidly; for example, when itâs hot at the ground and cold aloft. Thunderstorms that form at night occur in the absence of heating at the ground by the sun. Consequently, the storms that form at night are usually âelevated,â meaning that they form aloft above the cooler air near the ground, rather than near the ground, which only during the day can get warmer.