Most fence posts are treated with a wood. preservative to increase their service life, but the. installation method can affect the actual life of. the fence post. These pages will serve as a quick. guide to installing preservative-treated fence. posts for the greatest serviceable life.
The entire lifetime of a thunderstorm can vary. Typical afternoon thun â¦ derstorms in the summer usually consist of just 1 cell, thus lasts 20-30 minutes. Severe thunderstorms can consist of numerous cells, and last several hours.
Quick Answer. Tornadoes can last from a few seconds to over an hour, although most last less than 10 minutes. They form from mesocyclones, which are areas of organized rotation within supercell thunderstorms. Scientists still don't know why some mesocyclones become tornadoes and some do not.