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A tornadic debris signature (TDS), often colloquially referred to as a debris ball, is an area of high reflectivity on weather radar caused by debris lofting into the air, usually associated with a tornado. A TDS may also be indicated by dual-polarization radar products, designated as a polarimetric tornado debris signature (PTDS). Polarimetric radar can discern meteorological and nonmeteorological hydrometeors and the co-location of a PTDS with the enhanced reflectivity of a debris ball are used by meteorologists as confirmation that a tornado is occurring.

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  • La signature de débris de tornade, aussi appelée boule de débris ou buisson, est un arrangement particulier des échos sur un radar météorologique qui ne provient pas des précipitations mais des objets projetés au loin par le passage de l'entonnoir nuageux et de ses vents destructeurs. Ce ne sont pas toutes les tornades qui vont créer une telle signature, cela dépend de leur intensité, mais dans 70 à 80 % des cas où une boule de débris est visible, elle est associée avec une tornade. (fr)
  • A tornadic debris signature (TDS), often colloquially referred to as a debris ball, is an area of high reflectivity on weather radar caused by debris lofting into the air, usually associated with a tornado. A TDS may also be indicated by dual-polarization radar products, designated as a polarimetric tornado debris signature (PTDS). Polarimetric radar can discern meteorological and nonmeteorological hydrometeors and the co-location of a PTDS with the enhanced reflectivity of a debris ball are used by meteorologists as confirmation that a tornado is occurring. (en)
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  • La signature de débris de tornade, aussi appelée boule de débris ou buisson, est un arrangement particulier des échos sur un radar météorologique qui ne provient pas des précipitations mais des objets projetés au loin par le passage de l'entonnoir nuageux et de ses vents destructeurs. Ce ne sont pas toutes les tornades qui vont créer une telle signature, cela dépend de leur intensité, mais dans 70 à 80 % des cas où une boule de débris est visible, elle est associée avec une tornade. (fr)
  • A tornadic debris signature (TDS), often colloquially referred to as a debris ball, is an area of high reflectivity on weather radar caused by debris lofting into the air, usually associated with a tornado. A TDS may also be indicated by dual-polarization radar products, designated as a polarimetric tornado debris signature (PTDS). Polarimetric radar can discern meteorological and nonmeteorological hydrometeors and the co-location of a PTDS with the enhanced reflectivity of a debris ball are used by meteorologists as confirmation that a tornado is occurring. (en)
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  • Signature de débris de tornade (fr)
  • Tornado debris signature (en)
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