71 EnKF and Polarimetric Analyses of the 31 May 2013 El Reno, Oklahoma Supercell during Tornadogenesis

Tuesday, 8 November 2016
Broadway Rooms (Hilton Portland )
Patrick S. Skinner, CIMMS/Univ. of Oklahoma, Norman, OK; and J. C. Snyder, L. J. Wicker, H. B. Bluestein, and K. J. Thiem

Handout (27.3 MB)

This study assimilates rapid-scan Doppler radar to retrieve the three-dimensional wind and thermodynamic state of the 31 May 2013 El Reno, Oklahoma supercell.  Radial velocity data from the X-band, polarimetric, RaXPol mobile Doppler radar and NOAA’s National Weather Radar Testbed Phased-Array radar are assimilated using a Local Ensemble Transform Kalman Filter (LETKF) to produce analyses for a 20-min period centered on tornadogenesis.

Kinematic features in the LETKF analyses are compared with RaXPol polarimetric data to identify polarimetric representations of near-surface flow features in the El Reno supercell.

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