178 Integrated In Situ, DOW, and damage observations in tornadoes during VORTEX2 and ROTATE

Monday, 16 September 2013
Breckenridge Ballroom (Peak 14-17, 1st Floor) / Event Tent (Outside) (Beaver Run Resort and Conference Center)
Karen Kosiba, Center for Severe Weather Research, Boulder, CO; and J. Wurman

Analysis of the three-dimensional low-level wind field in a tornado that occurred on 25 May 2012 near Russell, Kansas will be presented. This unique data set during the ROTATE field project combines multi-level radar data taken by the Rapid Scan DOW, DOW7, DOW6, and an in situ mobile mesonet, providing an instantaneous vertical cross-section (7 levels) of winds from 3.5 m AGL (anemometer) and 9, 13, 18, 24, 30 36 m AGL (multi-beam Rapid-Scan DOW). Analyses indicate a shallow inflow layer, little dependency of the wind speed on height, and transitioning one- to two-celled vortex structures. Two-dimensional dual-Doppler analyses from DOW7 and the Rapid-Scan DOW with an unprecedented 1.6 km baseline and 7-s GBVTD analyses will be presented illustrating the rapid evolution of the low-level wind structure. Also EF ratings, damage and wind speed measurements are compared. These results will be compared with insitu/radar combined analysis from VORTEX2.
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