24th Conference on Severe Local Storms


X-band, mobile Doppler radar data collected in a tornadic thunderstorm: Data assimilation experiments

Robin L. Tanamachi, Univ. of Oklahoma, Norman, OK ; and L. J. Wicker, D. C. Dowell, H. B. Bluestein, S. J. Frasier, and K. Hardwick

On 4 May 2007, a mobile, dual-polarized, X-band Doppler radar was used to collect volumetric reflectivity and velocity data in a cyclic tornadic thunderstorm that later produced an EF5 tornado near Greensburg, Kansas. Sector scans were collected for a period of over one hour, at elevation angles ranging up to 20 degrees. Contemporaneous data were also collected by the WSR-88D radar at Dodge City, Kansas. These data were assimilated into the Weather Research and Forecasting (WRF) numerical weather prediction model using the Advanced Research WRF (WRF-ARW) model and the ensemble Kalman filter (EnKF) module within the freely available Data Assimilation Research Testbed (WRF/DART) package. Preliminary comparisons of these data assimilation experiments will be presented and their implications for tornadic thunderstorm forecasting discussed.wrf recording  Recorded presentation

Session 2, Geary, OK and Greensburg, KS storms
Monday, 27 October 2008, 10:30 AM-12:00 PM, North & Center Ballroom

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