Improved Doppler Velocity Dealiasing for Radar Data Assimilation and Storm-Scale Vortex Detection
Figure 4
Raw radial-velocity image scanned by the KTLX radar using VCP12 with 26.1 m s−1 at 0.9° tilt for the Shawnee, Oklahoma tornadic storm at 00:23:41 UTC on May 20, 2013 (local time 7:23:41 pm, on May 19, 2013). (b) Dealiased radial-velocity image produced by the first one-way forward procedure in the continuity check. (c) Final dealiased radial-velocity image produced by the new extended AR-Var-based method. (d) as in panel (d) but the first guess is from the RAP-predicted wind field for the refined AR-Var analysis. The white letters “A” in panel (a) mark the main aliased-velocity areas. The yellow circle in panels (a) and (d) encircles the mesocyclone and its produced EF4 tornado that struck Shawnee, Oklahoma, in the evening (local time around 6:45 pm) on May 19, 2013.
