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A tornadic debris signature (TDS), often colloquially referred to as a debris ball, [1] is an area of high reflectivity on weather radar caused by debris lofting into the air, usually associated with a tornado. [1] [2] A TDS may also be indicated by dual-polarization radar products, designated as a polarimetric tornado debris signature (PTDS).
The basic mechanism of debris fallout is debris lofted by a tornado's updraft winds high into the atmosphere. [4] Charles E. Anderson completed the first study focusing on debris fallout on the F5 1984 Barneveld tornado, which produced a large survey revealing a trail of paper debris as wide as 23 mi (37 km) at 110 mi (180 km) from Barneveld and a roughly 85 mi (137 km) long path of heavy ...
In most cases, the TVS is a strong mesocyclone aloft, not an actual tornado, although the presence of an actual tornado on the ground can occasionally be inferred based on a strong couplet in concert with a tornadic debris signature (TDS) (i.e. a "debris ball" on reflectivity or certain polarimetric characteristics), or through confirmation ...
In Colorado, a potential tornadic debris signature (TDS) was noted Thursday afternoon near Hale. Multiple tornadoes were reported near Arapahoe, where spotters confirmed short-lived tornadoes that ...
'Tornadic capable': Official word still out but damage was widespread ... “As that line was approaching the city, we had three distinct circulations, each with their own tornado debris signature ...
Tornadic signatures are indicated by a cyclonic inbound-outbound velocity couplet, where strong winds flowing in one direction and strong winds flowing in the opposite direction are occurring in very close proximity. The algorithm for this is the tornadic vortex signature (TVS) or the tornado detection algorithm (TDA). TVS is then an extremely ...
High-resolution satellite imagery showed extensive tree damage in an inaccessible area that aligned with a tornadic debris signature on radar. Some trees were able to be surveyed, allowing for a rating. [20] EF1 SW of Gillsburg to NE of Osyka: Amite, Pike: MS
To be clear, in this loop we have a westward moving, dissipating cyclonic tornado AND and newly developed anticyclonic tornado also moving west-southwest with a debris signature. This is so ...