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HAIL STORM [13 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2025-10-09

English

Subject field(s)
  • Atmospheric Physics
CONT

A mesocyclone is a vortex of air, approximately 2 to 10 miles in diameter, within a convective storm. In a mesocyclone, air rises and rotates around a vertical axis, usually in the same direction as low pressure systems. They are most often associated with a localised low-pressure region within a severe thunderstorm. Such storms can feature strong surface winds and severe hail. Mesocyclones often occur together with updrafts in supercells, where tornadoes may form. Mesocyclones are believed to form when strong changes of wind speed and/or direction with height("wind shear") sets parts of the lower atmosphere spinning in invisible tube-like rolls. The convective updraft of a thunderstorm is then thought to draw up this spinning air, tilting the rolls’ orientation upward(from parallel to the ground to perpendicular) and causing the entire updraft to rotate as a vertical column.

French

Domaine(s)
  • Physique de l'atmosphère
CONT

Une tornade se forme dans un méga orage, ceux qu'on appelle supercellulaires. Alors qu'un nuage d'orage se crée, si des vents de différentes vitesses (soit des vents rapides en altitude et des vents plus lents au niveau du sol; on appelle cette division le cisaillement des vents) le traversent, une rotation horizontale de l'air se crée dans le nuage. Ce tunnel horizontal est ensuite poussé par l'air chaud qui monte du sol. Le rouleau d'air se redresse à l'intérieur de la cellule orageuse pour prendre une position verticale. Cette colonne d'air qui pivote sur elle-même dans le nuage s'appelle un mésocyclone.

Spanish

Save record 1

Record 2 2010-03-02

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
  • Pest Control Equipment
CONT

The second scourge of the weather is hail. This has, it is true, a more localised effect but the havoc that it brings is considerable in the small area that it sweeps. The grapes which have been split by hailstones lose their juice which in turn causes rot to set in, which lowers the quality of the already greatly reduced harvest. Certain vineyard areas have installed anti-hail guns but it must be admitted that their success is far from complete.

CONT

Frost is a risk well known to local orchardists, but the sudden hail storms which occur regularly between September and January constitute a particularly selective threat to the young fruit crop.... alternative means were sought to combat hail. One such device was the ’hail gun’, originating in France and first introduced into an Ardmona orchard in time for the 1986-7 season. Certainly not a recent invention and lacking scientific support for its efficacy, the hail gun has gained a strong following among orchardists. Costing about $30, 000 each, hail guns are electronically operated and powered by exploding acetylene; the benefits were demonstrated, to the satisfaction of some, during a damaging storm in 1987. Their precise mode of action remains uncertain.

Key term(s)
  • antihail gun

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
  • Matériel de protection des végétaux
CONT

De tout temps les agriculteurs ont tenté de lutter contre la grêle, mais tous les essais de lutte contre ce phénomène se sont jusqu'à présent révélés vains. Parmi les procédés les plus anciennement utilisés figure le canon paragrêle, lançant des charges explosives dans les nuages réputés grêligènes. L'inefficacité de ce canon, conçu sans bases scientifiques, est maintenant reconnue par tous les experts.

OBS

grêlifuge : Se dit des appareils, engins (canons) ou pièces d'artifice (fusées), employés pour lutter contre la grêle.

Spanish

Campo(s) temático(s)
  • Estaciones, instrumentos y equipos meteorológicos
  • Equipo para la lucha antiparasitaria
Save record 2

Record 3 2005-07-20

English

Subject field(s)
  • Meteorology
CONT

Prahran has had more than its full share of damage done by floods caused by the copious rains at the Yarra's watershed... but only once was a fall of snow recorded in its meteorological annals. On 7th August, 1899, about 12. 30 p. m., a heavy hail storm began, accompanied by a remarkable fall in temperature.

OBS

annals: a written account of events year by year in chronological order.

French

Domaine(s)
  • Météorologie
DEF

[Ouvrage ou] listes de données d'observations climatiques classées, année par année, dans l'ordre chronologique.

Spanish

Save record 3

Record 4 2005-06-01

English

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

A storm consisting of thunder and lightning produced by a cumulonimbus, usually accompanied with rain or hail.

OBS

thunderstorm: The rain or hail might come from a normal nimbus too.

OBS

Thunderstorms are associated with convective clouds (Cumulonimbus) and are, more often, accompanied by precipitation in the form of rainshowers or hail, or occasionally snow, snow pellets, or ice pellets.

OBS

thunderstorm: When it is characterized by electrical phenomena, it is taken as a synonym for "electric storm."

Key term(s)
  • thunder-storm
  • thunder storm

French

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

Perturbation atmosphérique violente, accompagnée d'éclairs, de tonnerre, de rafales, d'averses de pluie ou de grêle.

OBS

Les orages sont associés aux nuages convectifs (Cumulonimbus) et sont, le plus souvent, accompagnés de précipitation sous la forme d'averses de pluie ou de grêle ou, occasionnellement, de neige, de neige roulée, de grésil ou de grêle.

OBS

L'orage paraît à première vue être essentiellement une manifestation électrique. Dans la pratique météorologique même, le premier et le dernier coup de tonnerre déterminent la durée de l'orage. En réalité, le [...] mécanisme orageux consiste en une succession d'ascendances très rapides, provoquant la formation des cumulonimbus et déterminant deux séries parallèles, mais distinctes, d'effets : les phénomènes électriques (qui n'existent pas toujours), et surtout les phénomènes mécaniques et pluviométriques (rafales et averses).

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
DEF

Descarga brusca de electricidad atmosférica que se manifiesta por un resplandor breve (relámpago) y por un ruido seco o un estruendo sordo (trueno).

OBS

Las tormentas se asocian a nubes convectivas (Cumulonimbus) y suelen acompañarse de precipitación en forma de chubascos de lluvia o de hielo o, en ocasiones, de nieve, nieve granulada, hielo granulado o granizo.

Save record 4

Record 5 2005-05-11

English

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

A supercell thunderstorm characterized by a relative lack of visible precipitation.

CONT

An LP supercell is characterized by a very long anvil, a small core region, a wall cloud at the back, and a thin precipitation curtain that usually lets some light through. Tornadoes can occur, but the main severe threat is usually large hail.

CONT

Visually similar to a classic supercell, except without the heavy precipitation core. LP storms often exhibit a striking visual appearance; the main tower often is bell-shaped, with a corkscrew appearance suggesting rotation. They are capable of producing tornadoes and very large hail. Radar identification often is difficult relative to other types of supercells, so visual reports are very important. LP storms almost always occur on or near the dry line, and thus are sometimes referred to as dry line storms.

CONT

LP supercells... have little VISIBLE precipitation and most regions of the storm base are visible. The word VISIBLE is stressed here because these storms often contain very large hail which does not block light as much as rain as if issues from the cloud. LP storms usually have a striking visual appearance with corkscrew or "barber-pole" striations on the updraft tower. LP supercell tornadoes are often unobscured from viewing around the storm. Sometimes called LP’er.

Key term(s)
  • low precipitation storm
  • dry line storm
  • LP'er

French

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

L'orage supercellulaire à faibles précipitations comporte une enclume très allongée, un petit noyau, un mur de nuages à l'arrière et un mince rideau de précipitations qui laisse habituellement filtrer de la lumière. Il peut présenter un risque de tornade, mais il se contente habituellement de produire de gros grêlons.

Spanish

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Record 6 2005-05-11

English

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

A supercell thunderstorm in which heavy precipitation (often including hail) falls on the trailing side of the mesocyclone.

CONT

High precipitation supercells... have a large precipitation core with heavy rains and possible hail. The rain can completely wrap an HP supercell tornado and obscure it from view on any side of the storm. Sometimes called HP’er.

OBS

Precipitation often totally envelops the region of rotation, making visual identification of any embedded tornadoes difficult and very dangerous. Unlike most classic supercells, the region of rotation in many HP storms develops in the front-flank region of the storm(i. e., usually in the eastern portion). HP storms often produce extreme and prolonged downburst events, serious flash flooding, and very large damaging hail events.

Key term(s)
  • HP'er

French

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

Les orages supercellulaires à fortes précipitations sont observés le plus souvent dans le centre et le sud-est des États-Unis. On en voit à l'occasion en Ontario et au Québec, mais rarement dans l'ouest du Canada.

CONT

Orage supercellulaire (HP-haute précipitation). Un orage supercellulaire est un orage qui a une très forte précipitation (pluie et grêle) et qui inclut aussi un mésocyclone. La forte précipitation enveloppe et cache le mésocyclone (et possiblement une tornade) ce qui fait son identification difficile. Les orages supercellulaires produisent aussi des vents descendants très forts. Les fortes précipitations peuvent causer des inondation soudaines et peuvent aussi produire de la très grosse grêle.

CONT

orage supercellulaire à haute précipitation : l'on dit plutôt orage supercellulaire à fortes précipitations.

Spanish

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Record 7 2005-05-11

English

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

A supercell with "text-book" like features such as a well-defined hook echo on a radar scope and the precipitation core downwind of the wall cloud and rain free storm base.

CONT

Supercell [is] a thunderstorm with a persistent rotating updraft. Supercells are rare, but are responsible for a remarkably high percentage of severe weather events-especially tornadoes, extremely large hail and damaging straight-line winds. They frequently travel to the right of the main environmental winds(i. e., they are right movers). Radar characteristics often(but not always) include a hook or pendant, bounded weak echo region(BWER), V-notch, mesocyclone, and sometimes a TVS [Tornado Vortex Signature]. Visual characteristics often include a rain-free base(with or without a wall cloud), tail cloud, flanking line, overshooting top, and back-sheared anvil, all of which normally are observed in or near the right rear or southwest part of the storm. Storms exhibiting these characteristics often are called classic supercells; however HP(High Precipitation) storms and LP(Low Precipitation) storms also are supercell varieties.

CONT

The severe version of a worst-last storm is also a supercell type, and is either called a "classic supercell" (the standard supercell type) or an "LP (low-precipitation) supercell" - a dry-weather, high wind shear version. ... The classic supercell has a larger, darker appearance and accounts for most of the major tornado events everywhere.

French

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

Les orages de queue qui sont violents sont aussi de type supercellulaire; on les appelle des orages supercellulaires classiques ou à faibles précipitations (caractérisés par la présence d'air sec et d'un fort cisaillement du vent). [...] Les orages supercellulaires classiques sont de plus grande étendue et plus sombres; ce sont eux qui produisent la plupart des tornades, quelle que soit la région.

Spanish

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Record 8 2005-03-11

English

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

After a beating rain, does the surface of your soil still appear open and porous like a sponge?

OBS

pelting : That pelts; chiefly of rain, hail, etc. : driving, beating, lashing. pelt(v.) : Of rain, snow, the sun's rays : To continue to beat with force or violence. pelt(n.) : The beating of rain or snow; a pelting storm.

OBS

driving: ... said also of a storm, in which rain or snow drives rapidly before a strong wind.

OBS

beating: Of wind, rain, etc.: That strikes violently, or batters; driving.

French

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

Pluie qui tombe avec violence.

CONT

L'écran de pluie se décrit comme étant un système canadien à la fine pointe de la technologie destiné à protéger les murs de la maison contre la pluie battante.

Spanish

Save record 8

Record 9 2004-04-20

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Flight Instruments and Equipment (Aeroindustry)
  • Weather Stations and Meteorological Instruments and Equipment
DEF

The cathode ray tube indicator in a radar set which displays the received signal.

CONT

In her deposition, Ms. O’Bryan testified that ordinarily when she released an aircraft from the Augusta Airport she would watch her radar screen until the aircraft got high enough to establish radar contact. ... [then] if the aircraft had reached high enough to establish radar contact and had then descended below radar contact, the aircraft’s call sign would have moved to a "suspense list" on her radar scope, but she said this did not happen.

CONT

When using radar it is important to examine all the storms on the radarscope. ... When the radarscope has several storms, it can be very difficult to determine which one will be the "storm of the day".

CONT

Weather Watch radars detect rain and hail and estimate their intensity from the strength of the echoes. The radar screen typically shows rain location on a map overlay-in effect, looking down on a storm-and presents various rain intensities in different colours.

OBS

radar screen; radar scope: terms officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Stations, instruments et équipements météorologiques
DEF

Tube cathodique qui affiche les échos reçus par un radar.

CONT

Le radar météorologique canadien est maintenant facilement accessible, [...] mais la présence de couleurs dans une partie de l'écran radar ne signifie pas qu'il pleuve, ni qu'il neige. Par la même occasion, le simple fait que les échos paraissent faibles ou soient invisibles ne signifie pas qu'un lieu donné ne reçoive pas une importante chute de pluie ou de neige.

OBS

écran radar : terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Instrumentos y equipo de vuelo (Industria aeronáutica)
  • Estaciones, instrumentos y equipos meteorológicos
DEF

Tubo catódico de un equipo de radar que presenta las señales recibidas.

OBS

pantalla de radar: término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 9

Record 10 2003-01-30

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
DEF

Product issued by [a] Weather Service when a severe thunderstorm is occurring, is imminent, or has a high probability of occurring.

CONT

Severe thunderstorm warning. A severe storm has developed, producing one or more of the following conditions : heavy rain, damaging winds, hail of at least 20 mm in diameter or intense lightning. Severe thunderstorms may also produce tornadoes. The storm's expected motion and developments will be given in the warning. If you are in the area specified, take shelter indoors.

OBS

A severe thunderstorm is a thunderstorm that produces ... a tornado, wind gusts of at least 58 mph (50 knots), and/or hail at least 3/4" in diameter.

Key term(s)
  • severe thunder storm warning

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
CONT

Avertissement d'orage violent. Il s'est formé un orage violent engendrant un ou plusieurs de ces éléments : grosse pluie, vents destructeurs, grêlons d'au moins 20 mm de diamètre ou intenses éclairs. De violents orages peuvent aussi provoquer des tornades. L'avertissement signalera le mouvement et l'évolution prévus. Si vous êtes dans la zone spécifiée, abritez-vous à l'intérieur.

CONT

Si un avertissement d'orage violent est émis pour votre région, vous devez passer à l'action car des conditions météorologiques particulièrement mauvaises sont en train de se produire ou vont probablement se produire. De violents orages peuvent aussi provoquer des tornades. Votre priorité absolue est de trouver un refuge. Si des vents violents se lèvent, allez au sous-sol ou dans une petite pièce à l'intérieur de la maison. Tenez-vous éloignés des fenêtres et évitez les bâtiments dotés de vastes toitures en porte-à-faux comme les patinoires, les supermarchés, les gymnases ou les granges.

Spanish

Save record 10

Record 11 2003-01-29

English

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

Very low temperatures can cause the bark of tree trunks to split, especially in the fall or spring when the plants have not hardened-off (acclimated to colder growing conditions) sufficiently. Trees and other plants are more susceptible to damage from sub-freezing temperatures when they are not fully dormant. Late spring frosts can kill the tips of new growth and buds (fruit, flower, foliage), and can slow growth and deform plants, reducing quality or making them unsalable.

CONT

Aggressive weather conditions such as storm rains, frost or hail facilitate the infection by detaching the epidermis. Treatment. Avoid sowing in areas affected by spring frost. Use healthy seeds.

CONT

Geographic locations can influence the growth and development of fruit trees. The growing seasons at altitudes above 7,500 feet are generally too short for many tree fruits and late spring freezing often kills blossoms.

CONT

An advection freeze occurs when cooling by advection predominates, and a radiation freeze occurs when radiational heat loss is the predominant form of cooling. ... Almost all spring freeze events in California vineyards are radiation freezes.

French

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

Les gelées de printemps, en particulier les gelées tardives (ainsi qu'en automne, les gelées précoces) sont également très graves, car elles se produisent à un moment où les végétaux sont en pleine activité (notamment les arbres fruitiers en fleur); mais leur localisation dans le temps comme dans l'espace permet une certaine lutte. En général, ces gelées revêtent un caractère local dû à l'absence de vent et au drainage de l'air froid et ont peu de conséquences au niveau national tout en restant très graves au niveau de l'exploitant.

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
Save record 11

Record 12 2002-02-14

English

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

A violent fall or storm of hail.

CONT

Hard hailstorms are generally accompanied with thunder and lightning.

CONT

A really "good" hail storm has a special name : we call it The Great White Combine. We would love to have it show up, but in the meanwhile, Glen has been busy getting our more conventional equipment ready to go. We have nothing ready to harvest yet, not even to swath.

CONT

Farming remains one of the most perilous ways to make a living, he said, recalling years when hailstorms - what farmers call the "white combine" - sweep across the plains and wipe out an entire year’s crop.

French

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

La catastrophe naturelle qui a causé le plus de dommages matériel dans l'histoire du Canada a été la tempête de grêle de Calgary du 7 septembre 1991.

CONT

La Cour de cassation [...] juge qu'un Tribunal d'instance peut retenir qu'une tempête de grêle, même de forte intensité, n'est pas un cas de force majeure.

OBS

white combine : cette expression pourrait se traduire littéralement par «moissonneuse-batteuse blanche», image très colorée pour désigner une tempête de grêle d'une telle intensité que les récoltes en sont détruites; elle est utilisée dans l'Ouest canadien et aux États-Unis, mais ne semble pas avoir d'équivalent consacré en français.

Key term(s)
  • moissonneuse-batteuse blanche

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
Save record 12

Record 13 1992-01-13

English

Subject field(s)
  • Fungi and Myxomycetes
CONT

Following a hail storm in the southern Cape Province of South Africa, about 2000 ha of pine plantations were infected by Sphaeropsis sapinea. The timber loss due to Sphaeropsis sapinea infection in compartments prematurely clearfelled was about 28% of volume and 55% of value of potential production.

OBS

Sphaeropsis: A form genus of imperfect fungi (family Sphaeropsidaceae) having large unicellular dark pycnospores and including many forms that have been found to be imperfect stages of various other fungi (as members of the genus Physalospora).

OBS

Context extracted from the PASCAL data base no: 91-0312823.

French

Domaine(s)
  • Champignons et myxomycètes
CONT

A la suite d'une tempête de grêle dans le sud de la province du Cap en Afrique du Sud, Sphaeropsis sapinea a attaqué environ 2000 ha de plantations de pins.

OBS

Sphaeropsis. Genre de champignon qui est une des causes du dépérissement des pins.

OBS

Contexte tiré de la base de données PASCAL no. : 91-0312823.

Spanish

Save record 13

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