Liz DiGangi-February 3

Liz DiGangi-February 3


DiGangi, Liz
Ph.D. Student


February 3, 2017 - 3:00 pm


February 3, 2017 - 4:00 pm


National Weather Center, 120 David L. Boren, Rm. 5600, Norman, OK 73072   View map

3-D Relationships of Lightning with the Kinematic and Microphysical Structure of the 29 May 2012 DC3 Storm


On 29 May 2012, a supercell thunderstorm formed within range of the Oklahoma Lightning Mapping Array, and was sampled near Kingfisher, OK by mobile radars as part of the Deep Convective Clouds and Chemistry field experiment. This study will take an in-depth look at the three-dimensional electrical, microphysical, and kinematic structure of the Kingfisher supercell, comparing dual-polarimetric microphysical observations, mixing ratios calculated by a diabatic Lagrangian analysis, and the 3-D wind retrievals from the mobile radar dual-Doppler analyses with 3-D lightning information. Preliminary results show that, for a given vertical cross section, VHF source locations tend to overlap with regions of graupel and cloud ice mixing ratios > 1 g kg-1 outside of large regions of sustained supercell updrafts. This is consistent with the noninductive charging theory, where ice-ice collisions generate storm charge and ice particles then carry charge throughout the storm via advection, sedimentation, and centrifuging.