That is the model agreed upon by most scientists. There is some evidence, though, that some tornadoes may form from the ground up. Scientists are still unsure what to make of this.
a funnel? a conical flask?
tornado is often made visible by a distinctive funnel-shaped cloud. Commonly called the condensation funnel, the funnel cloud is a tapered column of water droplets that extends downward from the base of the parent cloud. It is commonly mixed with and perhaps enveloped by dust and debris lifted from the surface.
A typhoon is a tropical cyclone or hurricane of the Western Pacific Area and the China seas. A tornado is a violently destructive windstorm occurring over land, especially in the middle west of America and charctarised by a long funnel shaped cloud extending towards the ground, made visible by condensation and debris
One cone-shaped item that is commonly used in science, especially in science experiments, is the funnel. Funnels are used to channel liquids into small-mouthed containers (i.e. graduated cylinders), reducing spillage.
An anaclastic glass is a glass or phial shaped like an inverted funnel with a thin convex bottom which can be made concave or convex by sucking out or blowing in air.
A tornado.
A funnel shaped cloud is called a funnel cloud. If it touches the ground it is called a tornado.
tornado clouds
Tornados
Most likely it is a funnel cloud. If it touches the ground then it is a tornado.
TORNADO
Nope... you're describing a tornado.
Afunnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface. A funnel cloud is usually visible as a cone-shaped or needle like protuberance from the main cloud base. Funnel clouds form most frequently in association with supercell thunderstorms.If a funnel cloud touches the ground it becomes a tornado. Most tornadoes begin as funnel clouds, but many funnel clouds do not make ground contact and so do not become tornadoes. Also, a tornado does not necessarily need to have an associated condensation funnel---if strong cyclonic winds are occurring at the surface (and connected to a cloud base, regardless of condensation), then the feature is a tornado. Some tornadoes may appear only as a debris swirl, with no obvious funnel cloud extending below the rotating cloud base.A funnel cloud that touches down on, or moves over water is a waterspout.
A rotating cone shaped column of air extending downward from a cloud when it touches the ground it is called a tornado
Funnel-shaped
A tornado produces a funnel-shaped cloud.
infundibuliform is a word that means funnel shaped.