57 GBVTD-retrieved vortex structure in the 26 May 2010 Prospect Valley, Colorado tornado-like vortices

Tuesday, 27 September 2011
Grand Ballroom (William Penn Hotel)
Robin L. Tanamachi, CAPS/Univ. of Oklahoma, Norman, OK; and H. B. Bluestein, W. Lee, K. Orzel, and S. J. Frasier

As part of the VORTEX2 field campaign, thermodynamic, kinematic, and radar observations were collected in a slow-moving, high-based supercell near Prospect Valley, Colorado on 26 May 2010. Although this supercell is considered nontornadic, and no condensation funnel was observed, evidence from the highest-resolution radars in the VORTEX2 fleet indicates the presence of a number of tornado-like vortices near the surface, complete with Doppler velocity couplets and, in at least three instances, weak-echo eyes. The tangential and radial wind component evolution of these vortices, from genesis to decay, are investigated via ground-based velocity track display (GBVTD) analysis of W-band velocity data, which had a range resolution of 30 m and azimuthal resolution of 0.18°. The retrieved tangential and radial velocity profiles will be compared to those generated from previous W-band radar observations of tornadoes and nontornadic vortices.

Supplementary URL: https://portfolio.ou.edu/users/tana8605/35AMSRadar/P57_Tanamachi_Prospect_Valley_GBVTD.pdf

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