Polarimetric Radar Observations at Low Levels during Tornado Life Cycles in a Small Sample of Classic Southern Plains Supercells

摘要: Abstract Preliminary schematics of polarimetric signatures at low levels in southern plains classic supercells are developed for pretornado, tornado, and tornado demise times from a small collection cases, most which cyclic producers. Characteristic patterns identified the reflectivity factor (ZHH), differential (ZDR), correlation coefficient (ρhv), specific phase (KDP). Signatures likely related to an ongoing also discussed. Major findings ZHH include “wings” higher values often extending away updraft region, stronger gradient on west side echo appendage, local maximum storm location favorable tornadogenesis. Increasing cyclonic curvature hook-echo region was noted through life cycle. The ZDR tended indicate hail shafts commonly times, with highest typically located along storm’s forward flan...