What is the greatest threat of a thunderstorm to an aircraft?
d. Hail. (1) Hail competes with turbulence as the greatest thunderstorm hazard to aircraft. Supercooled drops above the freezing level begin to freeze.
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Supercell thunderstorms are a special kind of single cell thunderstorm that can persist for many hours. They are responsible for nearly all of the significant tornadoes produced in the U.S. and for most of the hailstones larger than golf ball size. Supercells are also known to produce extreme winds and flash flooding.
“The risk of lightning traveling through plumbing might be less with plastic pipes than with metal pipes,” the CDC says. “However, it is best to avoid any contact with plumbing and running water during a lightning storm to reduce your risk of being struck.”
The safest location during a thunderstorm is inside a large enclosed structure with plumbing and electrical wiring. These include shopping centers, schools, office buildings, and private residences.