Thunderstorm
•Thunderstorms, also called cumulonimbus clouds, are tall, vertically developed
clouds that produce lightning and thunder.
•The majority of
thunderstorms are not severe.
•The National Weather Service reserves the word “severe” for thunderstorms that
have potential to threaten live and property from wind or hail.
•A thunderstorm is
considered severe if:
(1)Hail with diameter of
three-quarter inch or larger, or
(2)Wind damage or gusts of 50
knots (58mph) or greater, or
(3)A tornado.