TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

TORNADE MARINE [2 records]

Record 1 2005-05-16

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

Tornado that forms over land and travels over water [or it can forms on the water itself].

CONT

There are two type of waterspouts: "fair weather" and "tornadic". ... Tornadic waterspouts form within developing thunderstorms, or severe thunderstorms, and move much faster [than fairweather waterspouts] while being more intense.

CONT

A true waterspout forms over the water and is not accompanied by a strong storm. If a severe storm with a tornado happens to pass over a stretch of water, the tornado is sometimes called a tornadic waterspout and would be just as dangerous as if it were over land. The difference is entirely in the weather we see with the waterspout.

OBS

Tornadic waterspouts are relatively rare and are the most intense form of waterspouts.

Key term(s)
  • tornadic water-spout
  • tornadic water spout

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
CONT

Si un orage violent associé à une tornade passe au-dessus d’un plan d’eau, la tornade est parfois appelée tornade marine et elle est aussi dangereuse sur l'eau que sur terre.

CONT

On émet une alerte d’orages violents pour les orages qui répondent à un ou plusieurs des critères suivants : rafales de vent de plus de 90 km/h; grêlons de plus de 15 mm de diamètre(20 mm à Terre-Neuve et au Labrador) ;pluie : 25 mm en une heure OU 50 mm en trois heures; tornade ou trombe marine tornadique.

CONT

Une tornade marine d’une intensité exceptionnelle traverse l'île St-Paul au large de la pointe nord de l'île du Cap Breton. Un homme y trouve la mort et cinq bâtiments sont complètement détruits.

Spanish

Save record 1

Record 2 2005-03-23

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

... whirling columns of water droplets that spiral up from a lake or sea [and that] frequently form under clear skies.

CONT

Waterspouts form over (or move across) the coastal waters or intracoastal waters ... They are treated as tornadoes over water. There are two type of waterspouts: "fair weather" and "tornadic". Fair weather waterspouts are usually weaker, move slowly, and may not be associated with a thunderstorm. Tornadic waterspouts form within developing thunderstorms, or severe thunderstorms, and move much faster while being more intense.

CONT

The most common type of waterspout is a fairweather waterspout, which arises over warm seas, e.g. near Florida. It lasts for only a few minutes. These waterspouts are generally of F0 intensity, with winds of no more than 30 m/s. They typically occur during the developing stage of an airmass thunderstorm, below the main updraft. These thunderstorms are found in weakly sheared environments, so the spin-up must result mainly from vortex stretching and less from vortex tilting.

CONT

Fair weather waterspouts only form over water. ... The fair weather waterspouts are much more regular than tornadic waterspouts.

Key term(s)
  • fair-weather waterspout
  • fair-weather water-spout
  • fair-weather water spout
  • fair weather water-spout
  • fair weather water spout
  • fairweather water-spout
  • fairweather water spout

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
CONT

La trombe marine véritable se forme au-dessus de l'eau et n’ est pas accompagnée d’un violent orage. Si jamais un orage intense produisant une tornade passe au-dessus d’une masse d’eau, cette tornade présente autant de danger que sur terre. La différence entre la tornade et la trombe marine tient exclusivement aux conditions atmosphériques en présence dans le second cas. Si le temps est frais et nuageux et qu'il y a quelques averses mais pas d’orage comme tel, tout entonnoir ressemblant à une tornade qui pourrait se former au-dessus de l'eau est une trombe marine.

Spanish

Save record 2

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