A tornado which is beginning its descent from the base of a cumulonimbus cloud. This severe weather event may or may not reach the ground surface.

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A conde [..]

a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud but not reaching the ground or a water surface

A rotating conelike cloud that extends down-ward from the base of a thunderstorm. When it reaches the surface it is called a tornado.

tube-shaped cloud that, if it touches Earth, becomes a tornado or waterspout.

A rotating, cone-shaped column of air extending downward from the base of a thunderstorm but not touching the ground. When it reaches the ground it is called a tornado. Source: NOAA-NWS ERH

a rotating column of air extending from a cloud but not reaching the ground.

A rotating, cone-shaped column of air extending downward from the base of a thunderstorm but not touching the ground. When it reaches the ground it is called a tornado.

A violent, rotating column of air visibly extending from the base of a towering cumulus or cumulonimbus toward the ground, but not in contact with it.

A rotating column of cloud descending from the base of a large cumulus or cumulonimbus but which does not reach the surface.

Upper and visible part of water vapour arising from sea to form a waterspout.

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A condensation funnel is a tornado, not a funnel cloud, if either: It is in contact with the ground, or A debris cloud or dust whirl is visible beneath i [..]

A condensation funnel extending from the base of a towering cumulus or cumulonimbus cloud, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A condensation funnel is a tornado not a funnel cloud, if either a) it is in contact with the ground or b) a debris cloud or dust whirl is vi [..]

A cone-shaped cloud which extends from the the base of a cloud towards the ground without reaching the ground.

A tornado cloud or vortex cloud extending downward from the parent cloud but not reaching the ground.

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A condensation funnel is a tornado, not a funnel cloud, if either a) it is in contact with the ground or b) a debris cloud or dust whirl is visible beneath i [..]

A funnel shaped cloud forming around a rotating column of air that extends from the bottom of a cumulonimbus or towering cumulus cloud. Most often these form from Supercell thunderstorms. When a funnel cloud extends to reach the ground, it becomes a tornado.

A violent, rotating column of air visibly extending from the base of a towering cumulus or cumulonimbus toward the ground, but not in contact with it. It is reported as "FC" in an observation and on the METAR.

A rapidly rotating column of air extending from a cumulonimbus cloud with a circulation that does not reach the ground. once a funnel cloud reaches the ground it is then called a tornado. Growing Degr [..]

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A condensation funnel is a tornado, not a funnel cloud, if either it is in contact with the ground or a debris cloud or dust whirl is visible beneath it.

A tornado whose circulation has not reached the ground. Often appears as a rotating cone like cloud that extends downward from the base of a thunderstorm.

A rapidly rotating column of air extending from a cumulonimbus cloud with a circulation that does not reach the ground. Once a funnel cloud reaches the ground it is then called a tornado.

A condensation cloud, typically funnel-shaped and extending outward from a cumuli-form cloud, associated with a rotating column of air that may or may not be in contact with the ground. If the rotatio [..]

A tornadic circulation extending below cloud base but not reaching the ground; made visible by a cone-shaped cloud.

A rotating, cone-shaped column of air

A rotating column of air forming a pendant from a cumulus/cumulonimbus cloud with circulation not

A cloud, shaped like a funnel, that extends from the bottom of the cloud base. A rotating funnel cloud, associated with a wall cloud in a strong to severe storm, can develop into a tornado. A funnel c [..]

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is NOT in contact with the ground (and hence different from a tornado). A conde [..]

A violent, rotating column of air visibly extending from the base of a towering cumulus or cumulonimbus toward the ground, but not in contact with it. It is reported as "FC" in an observatio [..]

A rotating column of wind that hasn't touched the ground. Funnel clouds are called tornadoes when they reach the ground.

A violent, rotating column of air visibly extending from the base of a towering cumulus

A condensation funnel extending from the base of a towering cumulus or Cb, associated with a rotating column of air that is not in contact with the ground (and hence different from a tornado). A conde [..]

A rotating column of air extending from a cloud but not reaching the ground.

A violent, rotating column of air visibly extending from the base of a towering cumulus or cumulonimbus toward the ground, but not in contact with it. It is reported as “FC” in an observation and on the METAR.