Gustnado
A Gustnado (from the English. Gust for gust and the word part nado from Tornado , German gustnado ) is a special form of a whirlwind. In contrast to a tornado , there is no direct connection with the moist convective updraft of a shower or thundercloud. Gustnados are dynamically triggered by showers or thunderstorms on gust fronts . If the vortex gets in contact with the updraft area of the cloud , it can be intensified and turn into a tornado.
Web links
- What is a tornado? - Essay by Charles A. Doswell, Cooperative Institute for Mesoscale Meteorological Studies , Norman (OK), USA (English)