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FREEZING FOG [8 records]

Record 1 2024-01-31

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
  • Air Safety
Universal entry(ies)
FZFG
classification system code, see observation
DEF

A fog formed of supercooled water droplets which freeze on contact with objects, covering them with a coating of rime.

OBS

freezing fog : designation officially approved by the International Civil Aviation Organization(ICAO).

OBS

FZFG: International Civil Aviation Organization (ICAO) code used in aviation routine weather reports (METAR).

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
  • Sécurité (Transport aérien)
Entrée(s) universelle(s)
FZFG
classification system code, see observation
DEF

Brouillard formé de gouttelettes d'eau surfondues qui gèlent au contact d'objets et les couvrent d'un dépôt de givre.

OBS

brouillard givrant : désignation uniformisée par l'Organisation de l'aviation civile internationale (OACI).

OBS

FZFG : code de l'Organisation de l'aviation civile internationale (OACI) utilisé dans les messages d'observation météorologique régulière pour l'aviation (METAR).

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
  • Seguridad (Transporte aéreo)
Entrada(s) universal(es)
FZFG
classification system code, see observation
DEF

Niebla formada por gotitas de agua subfundida que se hielan en contacto con los objetos y los cubren de un depósito de hielo.

OBS

niebla engelante: designación aceptada oficialmente por la Organización de Aviación Civil Internacional (OACI).

OBS

FZFG: código de la Organización de Aviación Civil Internacional (OACI) utilizado en los informes meteorológicos rutinarios de aviación (METAR).

Save record 1

Record 2 2022-11-18

English

Subject field(s)
  • Atmospheric Physics
  • Fluid Mechanics and Hydraulics (Physics)
DEF

A fog composed of water droplets at a temperature below freezing point.

Key term(s)
  • super-cooled fog

French

Domaine(s)
  • Physique de l'atmosphère
  • Mécanique des fluides et hydraulique (Physique)
DEF

Brouillard composé de gouttelettes d'eau dont la température est inférieure au point de congélation.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Mecánica de fluidos e hidráulica (Física)
DEF

Niebla compuesta por gotitas de agua a una temperatura inferior al punto de congelación.

Save record 2

Record 3 2015-05-29

English

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

Soft rime is a white ice deposition that forms when the water droplets in light freezing fog or mist freeze to the outer surfaces of objects, with calm or light wind... Soft rime formations have the appearance of white ice needles and scales; they are fragile and can be easily shaken off objects. Factors that favour soft rime are small drop size, slow accretion of liquid water, high degree of supercooling, and fast dissipation of latent heat of fusion.

French

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

Le givre mou est un dépôt fragile composé surtout de fines aiguilles ou d'écailles de glace. Au sol ou près du sol, il se dépose par vent calme ou faible sur toutes les faces des objets exposés. Le givre mou tombe facilement des objets lorsqu'on secoue ceux-ci.

Spanish

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Record 4 2014-05-13

English

Subject field(s)
  • Special-Language Phraseology
  • Musculoskeletal System
  • Human Diseases - Various
CONT

FOG causes sudden but transient interruption of walking. Patients describe feeling as if their feet are “glued” or “stuck” to the floor. FOG is commonly observed while initiating gait (“start hesitation”) such as after getting up from a chair or getting out of a car. It often occurs while turning when it commonly causes sudden falls. It may also be caused by a visible obstacle in the path, walking through a doorway or narrow space, in a crowded or cluttered environment, or in a situation in which the patient is rushed or startled.

CONT

Freezing of Gait(FOG) is one of the most disturbing and least understood symptom in advanced stage of Parkinson's disease(PD).

French

Domaine(s)
  • Phraséologie des langues de spécialité
  • Appareil locomoteur (Médecine)
  • Maladies humaines diverses
DEF

Incapacité soudaine et temporaire de bouger les jambes et les pieds pendant la marche (sensation d’avoir les pieds collés au plancher).

Spanish

Save record 4

Record 5 2010-04-30

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
  • Air Transport
CONT

Weather observations at Gander are taken from two locations. The primary observation site is located on the roof of the terminal building; a second observation site is located at ground level about 200 feet from the terminal building. When freezing precipitation is present or suspected, weather observers use an ice accretion indicator composed of a small piece of aluminum alloy similar to that found in aircraft structure. It is placed outside at the observation site and inspected for the presence of freezing precipitation at each observation. Mandatory weather observations are taken every 30 minutes, at the hour and half hour. When freezing precipitation is present, the indicator is removed and a new one installed at each mandatory observation. Prior to installation, the indicator is pre-cooled to ambient temperature. Thus, when observed at the next observation following installation, the indicator shows the type and quantity of freezing precipitation which occurred in the previous 30 minutes.

CONT

Freezing fog may not always deposit rime or glaze on the "Ice Accretion Indicator", however if rime or glaze are evident, it positively indicates the presence of super-cooled water droplets and thus freezing rain, freezing drizzle or freezing fog is occurring. Freezing fog creates a significant risk of airframe icing and is therefore very important operational information for forecasters, pilots, flight service specialists, observers, communicators and others.

Key term(s)
  • ice-accretion indicator

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
  • Transport aérien
CONT

Le brouillard verglaçant peut ne pas toujours déposer de givre blanc ou de verglas sur l'«indicateur d'accumulation de glace». Toutefois, si la présence de givre blanc ou de verglas est évidente, on peut conclure à la présence de gouttelettes d'eau surfondues et, du coup, de la formation de pluie verglaçante, de bruine verglaçante ou de brouillard verglaçant; Le brouillard verglaçant entraîne un important risque de givrage sur la cellule des aéronefs. Il s'agit donc d'une donnée d'exploitation essentielle pour les prévisionnistes, les pilotes, les spécialistes de l'information de vol, les observateurs, les communicateurs et autres.

Spanish

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Record 6 2004-11-08

English

Subject field(s)
  • Atmospheric Physics
DEF

Greatest distance at which a black object of suitable dimensions can be seen and recognized against the horizon sky during daylight or could be seen and recognized during the night if the general illumination were raised to the normal daylight level.

CONT

In Seagull_Vis 4000, the visibility of space objects is naturally influenced by pre-set general meteorological visibility conditions, such as fog, rain, and snow; as well as the pre-set cloud density.

CONT

According to the National Weather Service, some of the obstructions to visibility include blowing and widespread dust, fog(including freezing fog and patchy fog), haze, mist, sand and blowing sand, smoke, blowing spray, and volcanic ash. It is reported as "X" in an observation and on the METAR.

OBS

Visibility is reported as statute miles, hundreds of feet or meters.

PHR

Meteorological visibility at night.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Distance la plus grande à laquelle un objet noir de dimensions appropriées peut être vu et identifié de jour sur le fond du ciel à l'horizon ou, quand il s'agit d'observations de nuit, pourrait être vu et identifié si l'éclairement général augmentait jusqu'à atteindre l'intensité normale en lumière du jour.

Spanish

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

Distancia máxima a la que puede verse y reconocerse a la luz del día con el cielo del horizonte como fondo, un objeto negro de dimensiones apropiadas o, en el caso de observaciones nocturnas, que pudiera verse y reconocerse si la iluminación se aumentara hasta llegar a los niveles normales de la luz del día.

PHR

Visibilidad nocturna.

Save record 6

Record 7 2003-11-12

English

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

Meteor consisting of an ensemble of liquid or solid water particles falling through or suspended in the atmosphere, blown by the wind from the Earth’s surface or deposited on objects on the ground or in the free air.

OBS

[Examples of hydrometeors. ] Liquid or solid water formation that is suspended in the air includes clouds, fog, ice fog, and mist. Drizzle and rain are examples of liquid precipitation, while freezing drizzle and freezing rain are examples of freezing precipitation. Solid or frozen precipitation includes ice pellets, hail, snow, snow pellets, snow grains, and ice crystals. Water vapor that evaporates before reaching the ground is virga. Examples of liquid or solid water particles that are lifted off the earth's surface by the wind includes drifting and blowing snow and blowing spray. Dew, frost, rime, and glaze are examples of liquid or solid water deposits on exposed objects.

French

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

Météore consistant en un ensemble de particules d'eau, liquides ou solides en chute ou en suspension dans l'atmosphère, ou soulevées de la surface du globe par le vent, ou déposées sur des objets au sol ou dans l'atmosphère libre.

OBS

La pluie, la neige, la grêle, la rosée, le givre, le verglas sont les principaux hydrométéores que l'on rencontre habituellement au voisinage du sol et qui sont susceptibles d'affecter l'agriculture.

Spanish

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

Meteoro acuoso que se produce como consecuencia de las modificaciones que sufre el vapor de agua que se halla en la atmósfera.

Save record 7

Record 8 2003-10-21

English

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

Changes, natural or artificial, in meteorological conditions leading to the disappearance of fog in a given area.

CONT

Clear skies brought early fog patches to parts of S England and freezing fog to parts of S Scotland. The fog clearance was followed by sunny spells over much of Scotland and N England but by cloudy conditions(with some light precipitation) over much of Ireland and parts of S England. Fog reformed by midnight in many places from Hampshire to S Scotland.

OBS

fog dispersal; fog dissipation: terms officially approved by the International Civil Aviation Organization (ICAO).

French

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

Évolution naturelle ou provoquée des conditions météorologiques entraînant la disparition du brouillard sur une région donnée.

OBS

dénébuler : Dissiper artificiellement un brouillard (sur les pistes d'un aéroport, en particulier).

OBS

dénébulation; dissipation du brouillard : termes uniformisés par l'Organisation de l'aviation civile internationale (OACI).

Spanish

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

Cambios, naturales o artificiales, en las condiciones meteorológicas, que provocan la desaparición de la niebla en una zona dada.

OBS

disipación de la niebla : término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

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