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.
Rating Newest Oldest. Best Answer: The most basic conditions to produce thunderstorms and tornadoes are cold dry air and warm moist air. The warm air rises through the cold air and forms clouds. The stronger the differences between air masses; the more likely that a thunderstorm will form. However, when the air masses are very different, super cell thunderstorms occur and can produce tornadoes. http://en.wikipedia.org/wiki/Thunderstor... http://www.nssl.noaa.gov/edu/safety/torn...