← Tornadoes Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Gulf A deep inlet of the seas almost surrounded by land, with a narrow mouth. Instability Lack of stability; the state of being unstable. Updrafts An upward current or draft of air. Downdrafts A downward current or draft of airs like for example a chimney. Tendency A inclination toward a particular characteristic or type of behavior. Vortex A mass of whirling fluid or air (whirlpool or whirlwind) Cumulonimbus A cloud forming a towering mass with a flat base at fairly low altitiude and often a flat top, as in thunderstorms. Gust front Where there is a front of a short strong wind.