TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Meteorological information issued concerning weather significant to the safety of aircraft.  1, record 1, English, - significant%20meteorological%20information

Record number: 1, Textual support number: 1 OBS

SIGMET advisories include the following :(a) active thunderstorm areas or lines of thunderstorms;(b) hurricanes, tropical storms;(c) moderate hail;(d) severe turbulence;(e) severe icing;(f) marked mountain waves;(g) widespread sandstorms and dust storms;(h) volcanic ash;(i) severe squall lines;(j) low-level wind shear; and(k) tornadoes or waterspouts.  1, record 1, English, - significant%20meteorological%20information

Record number: 1, Textual support number: 2 OBS

significant meteorological information; SIGMET: term, abbreviation and definition standardized by the Glossary for Pilots and Air Traffic Services Personnel Committee.  3, record 1, English, - significant%20meteorological%20information

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Renseignements météorologiques émis pour signaler des conditions météorologiques pouvant affecter la sécurité des aéronefs [...]  1, record 1, French, - renseignements%20m%C3%A9t%C3%A9orologiques%20significatifs

Record number: 1, Textual support number: 1 OBS

[Les renseignements météorologiques significatifs comprennent] : a) des zones d'orages ou des lignes d'orages actives; b) des ouragans, des tempêtes tropicales; c) de la grêle modérée; d) une turbulence forte; e) un givrage fort; f) des ondes orographiques; g) des tempêtes de sable ou de poussière de grande étendue; h) des cendres volcaniques; i) des lignes de grains forts; j) un cisaillement du vent (WS) à basse altitude; k) des tornades ou des trombes marines.  1, record 1, French, - renseignements%20m%C3%A9t%C3%A9orologiques%20significatifs

Record number: 1, Textual support number: 2 OBS

message de renseignements météorologiques; SIGMET : terme et abréviation uniformisés par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.  3, record 1, French, - renseignements%20m%C3%A9t%C3%A9orologiques%20significatifs

Record number: 1, Textual support number: 3 OBS

renseignements météorologiques significatifs; SIGMET : terme, abréviation et définition normalisés par le Comité sur le Glossaire à l'intention des pilotes et du personnel des services de la circulation aérienne.  4, record 1, French, - renseignements%20m%C3%A9t%C3%A9orologiques%20significatifs

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Información relativa a fenómenos meteorológicos en ruta que puedan afectar la seguridad de las operaciones de las aeronaves.  3, record 1, Spanish, - informaci%C3%B3n%20meteorol%C3%B3gica%20significativa

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A squall or thunderstorm in the Mediterranean  2, record 2, English, - ecnephias

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Grain ou tempête de tonnerre en Méditérranée.  1, record 2, French, - %C3%A9cn%C3%A9phias

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Squall accompanied by a thunderstorm.  5, record 3, English, - thunder%20squall

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Grain accompagné d'un orage.  3, record 3, French, - grain%20orageux

Record number: 3, Textual support number: 1 CONT

Les cumulonimbus sont des nuages souvent détachés en forme de montagne, os de sèche, enclume. Ils sont la signification même de grains d'orage accompagnés de vent violent.  2, record 3, French, - grain%20orageux

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Turbonada acompañada por tormentas.  1, record 3, Spanish, - turbonada%20tormentosa

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

An issue of considerable interest is the so-called multicellular thunderstorm system, as opposed to supercells, which are often presumed to be unicellular. A form of multicellular convection that has already been simulated extensively is the squall line. The typical method for simulating this form of deep line-oriented convection has been to release a number of laterally-aligned IB's. After the initial storms develop, their outflows merge, producing a line of convection resembling a squall line. Squall lines are not the only type of multicellular convection observed, however. In isolated multicell storms, a succession of updrafts is typical.  1, record 4, English, - multicellular%20thunderstorm%20system

Record number: 4, Textual support number: 1 OBS

Thunderstorms are often classified into a spectrum based on their cell structure: single cells, multicellular storms, and supercells. The type of storm depends on the instability and relative wind conditions at different layers of the atmosphere (shear). The "single-cell" (unicell) thunderstorm is [a] three-stage situation ... usually lasting about 30 minutes from the start of significant precipitation. A severe unicell storm is often referred to as a pulse thunderstorm. ... In a multicell thunderstorm, several thunderstorm cells merge into a larger system. The cloud becomes divided into updraft and downdraft regions separated by a gust front. The gust front may extend for several miles ahead of the storm, bringing with it increases in wind speed and atmospheric pressure, decreases in temperature, and shifts in wind direction. The storm itself will have different portions sequentually going through the various thunderstorm stages. In many cases the immature cells develop along a line known as a "flanking line," resulting in what is known as a line multicell.  6, record 4, English, - multicellular%20thunderstorm%20system

Record number: 4, Textual support number: 2 OBS

storm system: Often refers to "thunderstorm system" (in French: "système orageux"), which is a frequent type of storm system but not the only one; an elliptic form which can be used when there is no risk of ambiguity.  3, record 4, English, - multicellular%20thunderstorm%20system

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A non-frontal line or narrow band of thunderstorms (with or without squalls).  4, record 5, English, - squall%20line

Record number: 5, Textual support number: 1 CONT

The squall line thunderstorm is a solid or broken line of thunderstorms that form ahead of a large scale boundary such as a cold front. Although a squall line thunderstorm can produce a tornado, it is most likely to produce strong straight-line winds, downbursts, and large hail. Winds associated with a squall line can easily exceed 100 mph and give the appearance(and sound) a tornado has struck.  4, record 5, English, - squall%20line

Record number: 5, Textual support number: 1 OBS

These storms are organized into narrow belts or bands in the direction of the winds at low levels. In North America, the line pattern is more frequent than the scattered type, and the line storms are usually more intense. Thunderstorms of the line type may develop at any time of the day, but there is a distinct tendency for maximum occurrence in the afternoon hours.  7, record 5, English, - squall%20line

Record number: 5, Textual support number: 2 OBS

squall line; SQL: term and abbreviation officially approved by the International Civil Aviation Organization (ICAO).  8, record 5, English, - squall%20line

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Ligne non frontale ou bande étroite d'orages (avec ou sans grains).  8, record 5, French, - ligne%20de%20grains

Record number: 5, Textual support number: 1 CONT

En moyenne, il se produit chaque jour, sur toute la terre, quelque 45 000 orages. Il faut pour cela que l'atmosphère soit instable et pour une raison quelconque l'air ait été obligé de commencer son ascension. Une raison est l'impulsion que reçoit l'air chaud lorsque s'approche un front froid : on a cette fois des orages en ligne, car ils apparaissent le long de la ligne du front, et ils avancent avec lui. Ils peuvent surgir un peu avant l'arrivée du front, ou immédiatement derrière lui. Dans ces cas, la ligne d'orages est appelée «ligne de grains.»  6, record 5, French, - ligne%20de%20grains

Record number: 5, Textual support number: 1 OBS

ligne de grains : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.  9, record 5, French, - ligne%20de%20grains

Record number: 5, Textual support number: 2 OBS

ligne de grains; SQL : terme et abréviation uniformisés par l'Organisation de l'aviation civile internationale (OACI).  10, record 5, French, - ligne%20de%20grains

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

Línea no frontal o banda estrecha de tormentas (con o sin turbonadas).  3, record 5, Spanish, - l%C3%ADnea%20de%20turbonadas

Record number: 5, Textual support number: 1 OBS

línea de turbonadas; SQL: término y abreviatura aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).  6, record 5, Spanish, - l%C3%ADnea%20de%20turbonadas

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

An individual thunderstorm included within a squall line.  2, record 6, English, - squall%2Dline%20thunderstorm

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 OBS

Il s'agit d'un orage accompagnant une ligne de grain qui a balayé toute la côte méditerranéenne.  2, record 6, French, - orage%20de%20la%20ligne%20de%20grains

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

December 12, 2000. Toronto experienced a winter thunderstorm around 2 a. m. A squall passed over the city triggering sky blue lightning, numerous double strikes, and thunder. The thunder went on for much longer than warm season thunder...  2, record 7, English, - double%20strike

Record number: 7, Textual support number: 2 CONT

Fort McDowell is perfectly positioned to intercept monsoon storms that drop off the Mogollon Rim in the evenings. This double strike to the desert floor came with sudden winds lofting sand and dust.  3, record 7, English, - double%20strike

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 PHR

double coup de foudre simultané  1, record 7, French, - double%20coup%20de%20foudre

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

A sudden pressure change, usually a rise, associated with the passage of a thunderstorm, squall or gust front, and indicated by a steep vertical line on a barogram.  2, record 8, English, - pressure%20jump

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Sur un barogramme, trait vertical indiquant une variation brusque de la pression, habituellement à la hausse, lors du passage d'un orage, d'un grain ou d'un front de rafale.  2, record 8, French, - crochet%20barom%C3%A9trique

Record 8,  Textual support,  Spanish

Record number: 8, Textual support number: 1 DEF

En un barograma, trazo vertical que indica un cambio brusco de la presión, generalmente una subida, asociado con el paso de una tormenta, de una turbonada o de un frente de ráfaga.  1, record 8, Spanish, - salto%20de%20presi%C3%B3n

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

The gustnado has been accepted as a "type of tornado" but is not associated with the typical tornado characteristics. It is a brief, intense vortex that forms on the leading edge of severe gust fronts. Scud and debris or dirt may be seen but a condensation funnel is usually absent. They will last from a few seconds to a minute and are strong enough to cause minor damage. They are distinguished from a true tornado by their location under an advancing dark cloud bank ahead of the rain core. Although the air is rotating, the situation would group this event more appropriately with straight-line winds.  2, record 9, English, - straight%2Dline%20winds

Record number: 9, Textual support number: 2 CONT

The leading edge of a gust front(or downburst) often creates an area of convergence which can lead to future thunderstorm growth; close monitoring of visible gust fronts becomes very important in forecsting areas of future storm development. Gust fronts from a line of cells, such as a squall line, can form an elongated area of divergence and convergence. These elongated areas or squall line gust fronts are important components to the squall line structure, and often times a producer of severe weather due to straight-line winds.  3, record 9, English, - straight%2Dline%20winds

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

«gustnado» : On la considère comme un «type de tornade» mais elle n'a pas les caractéristiques habituelles de la tornade. C'est un tourbillon intense et de courte durée qui se forme sur la bordure antérieure d'un fort front de rafales. On peut voir des nuages en lambeaux et des débris ou de la poussière, mais rarement d'entonnoir de condensation. La «gustnado» dure de quelques secondes à une minute et peut causer des dégâts mineurs. Elle se distingue de la vraie tornade par sa place au-dessous d'un banc de nuages sombres qui approche, à l'avant du noyau de pluie. Même si l'air est en rotation, la situation porte à classer ce phénomène avec les vents rectilignes.  1, record 9, French, - vents%20rectilignes

Record 9,  Textual support,  Spanish