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An air-mass thunderstorm, also called an "ordinary", "single cell", or "garden variety" thunderstorm, is a thunderstorm that is generally weak and usually not severe. These storms form in environments where at least some amount of Convective Available Potential Energy (CAPE) is present, but very low levels of wind shear and helicity. The lifting source, which is a crucial factor in thunderstorm development, is usually the result of uneven heating of the surface, though they can be induced by weather fronts and other low-level boundaries associated with wind convergence. The energy needed for these storms to form comes in the form of insolation, or solar radiation. Air-mass thunderstorms do not move quickly, last no longer than an hour, and have the threats of lightning, as well as showery

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  • An air-mass thunderstorm, also called an "ordinary", "single cell", or "garden variety" thunderstorm, is a thunderstorm that is generally weak and usually not severe. These storms form in environments where at least some amount of Convective Available Potential Energy (CAPE) is present, but very low levels of wind shear and helicity. The lifting source, which is a crucial factor in thunderstorm development, is usually the result of uneven heating of the surface, though they can be induced by weather fronts and other low-level boundaries associated with wind convergence. The energy needed for these storms to form comes in the form of insolation, or solar radiation. Air-mass thunderstorms do not move quickly, last no longer than an hour, and have the threats of lightning, as well as showery light, moderate, or heavy rainfall. Heavy rainfall can interfere with microwave transmissions within the atmosphere. Lightning characteristics are related to characteristics of the parent thunderstorm, and could induce wildfires near thunderstorms with minimal rainfall. On unusual occasions there could be a weak downburst and small hail. They are common in temperate zones during a summer afternoon. Like all thunderstorms, the mean-layered wind field the storms form within determine motion. When the deep-layered wind flow is light, outflow boundary progression will determine storm movement. Since thunderstorms can be a hazard to aviation, pilots are advised to fly above any haze layers within regions of better visibility and to avoid flying under the anvil of these thunderstorms, which can be regions where hail falls from the parent thunderstorm. Vertical wind shear is also a hazard near the base of thunderstorms which have generated outflow boundaries. (en)
  • Un orage de masse d'air, aussi appelé orage unicellulaire ou monocellulaire, est un orage naissant du réchauffement ponctuel d'une masse d'air uniforme sans déclencheur dynamique comme un front, et d'une énergie relativement faible. Le cisaillement des vents avec l'altitude y est nul ou faible ce qui donne des orages généralement isolés. Comme le déplacement des orages de masse d'air dépend uniquement des vents en altitude, s'il ne vente pas, les orages resteront presque stationnaires. L'orage de masse d'air est le type d'orages le plus fréquent, c'est pourquoi il est nommé orage « ordinaire ». Il peut être associé à une forte averse et des rafales de vent. Les pluies ne sont presque jamais torrentielles et les chutes de gros grêlons sont rarissimes. Quand cela se produit, il est question d’orage « pulsatif », car il surgit et se dissipe comme une impulsion soudaine. Dans les régions arides du globe, l'évaporation peut être telle que la pluie n'atteint pas le sol et forme de la virga sous le cumulonimbus. (fr)
  • Een luchtmassabui, ook wel warmteonweer, is een bui die zich ontwikkelt in koude massa achter een koufront. Aan de rand van de daar aanwezige cellen is een stijgstroom waardoor cumuluswolken ontstaan, terwijl het in het midden van de cellen onbewolkt is door de daalstromen. Er is hierbij weinig verticale windschering. De wolken kunnen hierna uitgroeien tot cumulonimbus met neerslag. Vaak krijgen de koude daalstromen al snel de overhand, waardoor de bui zijn voedingsbron van warme stijgstromen verliest. Over het algemeen vindt dit binnen een half uur plaats, maar doordat er vaak meerdere cellen zijn, kan dit buiencomplex voor enige uren neerslag zorgen. (nl)
  • Uma tempestade de massa de ar ou tempestade de célula simples é um tipo de tempestade que geralmente apresenta pouca severidade. Estas tormentas se formam em ambientes onde exista energia potencial convectiva disponível suficiente, mas níveis reduzidos de ventos cisalhantes e . A fonte de convecção do ar, que é um fator crucial para o desenvolvimento da tempestade, é normalmente o resultado do aquecimento por insolação desigual da superfície, apesar de também poder ser induzido por sistemas frontais ou limites associados com zonas de convergência. A energia necessária para a formação das tempestades provém da incidência da radiação solar. Tempestades de massa de ar não se movem rapidamente, não duram mais que uma hora, e têm o potencial de produzir raios, além de chuva que varia de intensidade fraca a forte, sendo que a precipitação intensa interfere na transmissão de micro-ondas pela atmosfera. As características das descargas elétricas da atmosfera estão relacionadas com a natureza da tempestade que as produzem, e podem causar incêndios florestais quando atingem locais onde a precipitação é mínima. Eventualmente podem causar rajadas de vento fracas e granizos de pequeno tamanho. São comuns em zonas temperadas durante as tardes de verão. Como todas as tempestades, os ventos nas camadas médias da atmosfera determinam o seu movimento. Uma vez que tempestades de massa de ar podem representar perigo para a aviação, pilotos são aconselhados a voar sobre as nuvens em regiões de melhor visibilidade para evitar voar sob a bigorna destas tempestades, que podem ser regiões onde o granizo cai. Ventos cisalhantes verticais representam também perigo próximo à base da tempestade, as quais originaram as . (pt)
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  • Een luchtmassabui, ook wel warmteonweer, is een bui die zich ontwikkelt in koude massa achter een koufront. Aan de rand van de daar aanwezige cellen is een stijgstroom waardoor cumuluswolken ontstaan, terwijl het in het midden van de cellen onbewolkt is door de daalstromen. Er is hierbij weinig verticale windschering. De wolken kunnen hierna uitgroeien tot cumulonimbus met neerslag. Vaak krijgen de koude daalstromen al snel de overhand, waardoor de bui zijn voedingsbron van warme stijgstromen verliest. Over het algemeen vindt dit binnen een half uur plaats, maar doordat er vaak meerdere cellen zijn, kan dit buiencomplex voor enige uren neerslag zorgen. (nl)
  • An air-mass thunderstorm, also called an "ordinary", "single cell", or "garden variety" thunderstorm, is a thunderstorm that is generally weak and usually not severe. These storms form in environments where at least some amount of Convective Available Potential Energy (CAPE) is present, but very low levels of wind shear and helicity. The lifting source, which is a crucial factor in thunderstorm development, is usually the result of uneven heating of the surface, though they can be induced by weather fronts and other low-level boundaries associated with wind convergence. The energy needed for these storms to form comes in the form of insolation, or solar radiation. Air-mass thunderstorms do not move quickly, last no longer than an hour, and have the threats of lightning, as well as showery (en)
  • Un orage de masse d'air, aussi appelé orage unicellulaire ou monocellulaire, est un orage naissant du réchauffement ponctuel d'une masse d'air uniforme sans déclencheur dynamique comme un front, et d'une énergie relativement faible. Le cisaillement des vents avec l'altitude y est nul ou faible ce qui donne des orages généralement isolés. Comme le déplacement des orages de masse d'air dépend uniquement des vents en altitude, s'il ne vente pas, les orages resteront presque stationnaires. (fr)
  • Uma tempestade de massa de ar ou tempestade de célula simples é um tipo de tempestade que geralmente apresenta pouca severidade. Estas tormentas se formam em ambientes onde exista energia potencial convectiva disponível suficiente, mas níveis reduzidos de ventos cisalhantes e . A fonte de convecção do ar, que é um fator crucial para o desenvolvimento da tempestade, é normalmente o resultado do aquecimento por insolação desigual da superfície, apesar de também poder ser induzido por sistemas frontais ou limites associados com zonas de convergência. A energia necessária para a formação das tempestades provém da incidência da radiação solar. Tempestades de massa de ar não se movem rapidamente, não duram mais que uma hora, e têm o potencial de produzir raios, além de chuva que varia de intensi (pt)
rdfs:label
  • Air-mass thunderstorm (en)
  • Orage de masse d'air (fr)
  • Luchtmassabui (nl)
  • Tempestade de massa de ar (pt)
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