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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A bulletin issued by [local forecast] offices to alert the public to expected formation of thin ice on plants, trees, etc., when temperatures are expected to drop to between 30°F and 40°F. Since air temperature sensors are located 5 feet above ground level, frost will often occur when air temperature sensors indicate about 36°F. A bulletin may be issued indicating "Scattered Frost" or "Frost in low lying areas".  3, record 1, English, - frost%20warning

Record number: 1, Textual support number: 1 OBS

Frost describes the formation of thin ice crystals on the ground or other surfaces in the form of scales, needles, feathers, or fans. Frost develops under conditions similar to dew, except the temperatures of the Earth's surface and earthbound objects falls below 32°F. As with the term "freeze, "this condition is primarily significant during the growing season. If a frost period is sufficiently severe to end the growing season or delay its beginning, it is commonly referred to as a "killing frost. "Because frost is primarily an event that occurs as the result of radiational cooling, it can occur with standard observing level temperature(at 5 feet above ground) in the mid to upper 30's.  4, record 1, English, - frost%20warning

Record number: 1, Textual support number: 2 OBS

In consulted sources, "frost warning" and "frost advisory" are defined in the same manner. However, Environment Canada differentiates a "warning" from an "advisory": "A weather advisory is issued when forecast conditions are expected to cause general inconvenience or concern, and do not pose a serious enough threat to issue a weather warning. An advisory will often precede a warning."  5, record 1, English, - frost%20warning

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Avis diffusé par les Services de météorologie lorsqu'ils prévoient que la température de l'air tombera à 2 °C ou moins pendant la saison de croissance des végétaux, qui s'étend du 15 mai au 15 octobre environ.  3, record 1, French, - avertissement%20de%20gel

Record number: 1, Textual support number: 1 CONT

Avertissement; avis météorologique. [...] Cette procédure d'alerte est adoptée lorsque l'événement météorologique en cause est susceptible d'avoir de graves incidences sur la sécurité des personnes ou la conservation des biens. C'est le cas des avis de tempête diffusés aux marins ou des avis de gel transmis aux agriculteurs. Les moyens de diffusion mis en œuvre peuvent être très divers : télex, radiodiffusion, télévision, répondeurs téléphoniques, télématique (Minitel).  4, record 1, French, - avertissement%20de%20gel

Record number: 1, Textual support number: 1 OBS

Dans certaines sources consultées, les termes «avertissement de gel» et «avis de gel» décrivent la même notion. Selon Environnement Canada l'«avertissement» décrit «des conditions météorologiques pouvant menacer la vie, les biens et le bien-être des gens». L'«avis» précède l'«avertissement». De façon générale, «warning» se traduit par «avertissement» et «advisory» par «avis».  3, record 1, French, - avertissement%20de%20gel

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Deposit of ice crystals in the form of scales, needles, feathers and fans and which forms on objects in the same manner as dew, except that the water vapour of the air is transformed directly into ice crystals.  5, record 2, English, - hoar%20frost

Record number: 2, Textual support number: 1 CONT

Hoarfrost [is] a deposit of interlocking ice crystals formed by direct sublimation on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, and poles. Also, frost may form on the skin of an aircraft when a cold aircraft flies into warm and moist air or when it passes through air that is supersaturated with water vapor. Hoarfrost is formed similarly to the way dew is formed except that the temperature of the frosted object must be below freezing. Frost forms when air with a dew point below freezing is brought to saturation by cooling. In addition to its formation on freely exposed objects (air hoar), hoarfrost also forms inside unheated buildings and vehicles, in caves, in crevasses (crevasse hoar), on snow surfaces (surface hoar), and in air spaces within snow, especially below a snow crust (depth hoar). Hoarfrost is more fluffy and feathery than rime, which in turn is lighter than glaze. Hoarfrost is designated light or heavy (frost) depending upon the amount and uniformity of deposition.  6, record 2, English, - hoar%20frost

Record number: 2, Textual support number: 1 OBS

Hoarfrost [is] due to nocturnal radiation. Hoarfrost forms during still, clear nights, is small in amount, needlelike in texture, the "needles" approximately perpendicular to the objects on which they occur, and most abundant along the edges.  7, record 2, English, - hoar%20frost

Record number: 2, Textual support number: 2 OBS

hoarfrost: sometimes confused with "rime."  7, record 2, English, - hoar%20frost

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Couche épaisse de cristaux de glace produite par le gel d'un dépôt de vapeur d'eau.  2, record 2, French, - gel%C3%A9e%20blanche

Record number: 2, Textual support number: 1 CONT

La gelée blanche est un dépôt de glace, d'aspect cristallin, affectant le plus souvent la forme d'écailles, d'aiguilles, de plumes ou d'éventails. Elle se forme d'une manière analogue à la rosée, lorsque la température du point de rosée de l'air est inférieure à 0 °C.  3, record 2, French, - gel%C3%A9e%20blanche

Record number: 2, Textual support number: 2 CONT

Pour deux raisons, une gelée blanche cause moins de dommage à la végétation qu'une gelée noire : 1) elle tend à isoler la plante d'un froid plus intense, 2) elle libère la chaleur latente de fusion en faveur du milieu.  2, record 2, French, - gel%C3%A9e%20blanche

Record number: 2, Textual support number: 3 CONT

On considère qu'il existe trois types de gelées : Les gelées par advections ou gelées noires ou gelées de plein vent. [...] Les gelées blanches ou gelées par rayonnement. Elles se produisent surtout pendant certaines nuits claires de février ou mars et même éventuellement jusqu'au début mai et occasionnent de gros dégâts sur la floraison. [...] Les gelées par évaporation.  4, record 2, French, - gel%C3%A9e%20blanche

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Precipitación atmosférica de gotitas de agua en estado de sobrefusión que, al entrar en contacto con una superficie sólida (plantas, hilos telegráficos, etc.), se congelan bruscamente sobre ella y la cubren de una capa de pequeños cristales de hielo.  3, record 2, Spanish, - escarcha

Record number: 2, Textual support number: 1 OBS

escarcha; helada blanca: términos utilizados por la Asociación Mundial de la Carretera.  4, record 2, Spanish, - escarcha

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Hoarfrost that exhibits a relatively simple macroscopic crystalline structure.  1, record 3, English, - crystalline%20frost

Record number: 3, Textual support number: 1 OBS

hoarfrost : Deposit of ice crystals in the form of scales, needles, feathers and fans and which forms on object in the same manner as dew, except that the water vapour of the air is transformed directly into ice crystals.  2, record 3, English, - crystalline%20frost

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish