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).

This new signature, known as the Tornadic Debris Signature (TDS), will be a powerful tool, particularly in very rural areas where we might not otherwise receive confirmation that a tornado is doing damage for several hours. The presence of a TDS will give National Weather Service meteorologists an opportunity to enhance and fine-tune ...

2015年12月1日 · Values of polarimetric radar variables may vary substantially between and through tornadic debris signature (TDS) events. Tornadoes with higher intensity ratings are associated with higher average and extreme values of reflectivity factor at horizontal polarization ZHH and lower values of copolar cross-correlation coefficient ρhv.

2013年2月1日 · This study investigates the use of tornadic debris signature (TDS) parameters to estimate tornado damage severity using Norman, Oklahoma (KOUN), polarimetric radar data (polarimetric version of the Weather Surveillance Radar-1988 Doppler radar). Several TDS parameters are examined, including parameters based on the 10th or 90th percentiles of ...

2023年10月9日 · When a tornado lofts debris to the height of the radar beam, a signature known as the tornadic debris signature (TDS) can sometimes be observed on radar. The TDS is a useful signature for operational forecasters because it can confirm the presence of a tornado and provide information about the amount of damage occurring.

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 hook echo is a pendant or hook-shaped weather radar signature as part of some supercell thunderstorms.

Tornado Debris Signature (TDS) Identification. Criteria for a “Radar Confirmed Tornado” Upgrade to Catastrophic Tag “Tornado Emergency” if: (Must meet BOTH) Measuring V. rot. NowcastingSignificant Tornadoes. V. rot = EF2+: 8,000-10,000 ft. CAUTION: Low CC in inflow area can APPEAR to be TDS Make sure the dBZ is ≥20. Vertical Side Lobe ...

2017年3月28日 · Seeing a "debris ball" on radar from a tornado if fairly easy, but there are more subtle signs on radar that can tell meteorologists if there is a tornado.

Current Radar, Lightning Strikes, and Weather Observations. Current Watches, Warnings, and Advisories. Services

2018年11月8日 · National Weather Service damage survey reports show damage consistent with an EF-1 Tornado in Jackson County. How are tornado debris signatures (TDS) used to detect tornadoes?