TERMIUM Plus®

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

WET DOWNBURST [3 records]

Record 1 2004-11-26

English

Subject field(s)
  • Atmospheric Physics
CONT

Downbursts occur in regions of a severe thunderstorm where the air is accelerated downward by exceptionally strong evaporative cooling occurs(a dry downburst) or by very heavy rain which drags dry air down with it(a wet downburst). When the rapidly descending air strikes the ground, it spreads outward in all directions in a circle, like a fast-running faucet hitting the sink bottom.

French

Domaine(s)
  • Physique de l'atmosphère
CONT

Une rafale descendante humide est produite par le poids des précipitations dans un environnement très humide.

Spanish

Save record 1

Record 2 2003-07-16

English

Subject field(s)
  • Atmospheric Physics
  • Air Transport
DEF

Violent and damaging downdraught reaching the surface, associated with a severe thunderstorm.

CONT

Downbursts occur in regions of a severe thunderstorm where the air is accelerated downward by exceptionally strong evaporative cooling occurs(a dry downburst) or by very heavy rain which drags dry air down with it(a wet downburst). When the rapidly descending air strikes the ground, it spreads outward in all directions in a circle, like a fast-running faucet hitting the sink bottom. Dr. Fujita has defined downbursts as a surface wind in excess of 62 km/hr(39 mph) caused by a small-scale downdraft from the base of a convective cloud. He further subdivided downbursts into two categories macrobursts and microbursts.

OBS

downburst: term officially approved by the International Civil Aviation Organization (ICAO).

PHR

Dry, wet downburst.

French

Domaine(s)
  • Physique de l'atmosphère
  • Transport aérien
DEF

Courant descendant intense dont l'écrasement en surface produit des vents violents, divergents et turbulents.

CONT

Des rafales descendantes ou «avalanche d'air» sont également associés aux orages violents. Il s'agit de courants d'air descendants qui s'étendent lorsqu'ils touchent la surface du sol et produisent des vents directs pouvant atteindre jusqu'à 200 km à l'heure. Comme les tornades, les rafales descendantes peuvent causer des dommages considérables. De tels rafales produisent un bruit assourdissant, semblable à celui d'une tornade.

CONT

Une rafale descendante [...] a un effet sur l'incidence de l'avion. Cette incidence diminue ce qui a pour effet de diminuer la portance, ce qui peut être dangereux lorsque l'avion est en phase d'atterrissage.

OBS

rafale descendante : terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).

PHR

Rafale descendante humide, sèche.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Transporte aéreo
DEF

Fuerte corriente descendente que ocasiona vientos destructores al llegar a la superficie del suelo, acompañada de una intensa tormenta.

OBS

ráfaga descendente : término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 2

Record 3 2003-07-14

English

Subject field(s)
  • Atmospheric Physics
CONT

The precipitation from this cloud is very weak, and most rain evaporates before reaching the ground. But this causes one more severe feature: A dry downburst. Great damages to property and life in the Middle-East have occurred as a result of dry downbursts. The surface air under the alto-Cb is extremely hot and dry (humidity less than 10%). The rain falling from the thunderstorm under the downdraft evaporates as a result of the dry air. Evaporation causes the air to cool, which increases the speed of the downburst. Sustained winds can reach 160 km/h (100 mph) or more, for a few minutes. In Israel, the dry downbursts usually occur over the desert regions, in the south and east, when the humidity is very low.

CONT

Downbursts occur in regions of a severe thunderstorm where the air is accelerated downward by exceptionally strong evaporative cooling occurs(a dry downburst) or by very heavy rain which drags dry air down with it(a wet downburst). When the rapidly descending air strikes the ground, it spreads outward in all directions in a circle, like a fast-running faucet hitting the sink bottom.

French

Domaine(s)
  • Physique de l'atmosphère
CONT

Une rafale descendante sèche est produite par l'évaporation des précipitations dans un environnement aux basses couches très sèches.

Spanish

Save record 3

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: