Aftermath of a hailstorm

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Preliminary V2RAMP Summary

Animated Data Sequences

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VORTEX2 Risk Analysis and Mitigation Project (V2RAMP)

Figure 1. Reflectivity in dBZ (left panel) and (aliased) radial velocity in meter per second (right panel) at 0.7 deg elevation for the developing tornadic supercell storm southwest of Ft. Supply, OK in the period 0003-0016 UTC. View full-sized video (.mov, 1.1MB) get full-sized video

Figure 2. Reflectivity (left panel) and (aliased) radial velocity (right panel) at 1.2 deg elevation for the tornadic supercell storm near Hennessey, OK in the period 2310 - 2336 UTC on 5/24/08. View full-sized video (.mov, 2.1MB) get full-sized video

Animated Data Sequences

During V2RAMP, raw (SIGMET-format) SR-1 data volumes were transferred in real-time via an ultra-high bandwidth GEO satellite dish system from SR-1 to the Hazardous Weather Testbed (HWT) at the National Weather Center in Norman, OK. Several time-sequences of SR-1 data were viewed in nearly real-time by the Nowcaster in the HWT using the NSSL/CIMMS Warning Decision Support System - Integrated Information (WDSS-II) graphical user interface (GUI). The recently upgraded Sigmet RCP-8/RVP-8 controller/processor on SR-1 allowed the implementation of Doppler sampling with rather large Nyquist thresholds, easing real-time interpretation of the radial velocity field. The following animated sequences illustrate the real-time SR-1 data feed and subsequent perusal in WDSS-II.

Figure 1 depicts reflectivity in dBZ (left panel) and (aliased) radial velocity in meter per second (right panel) at 0.7 deg elevation for the developing tornadic supercell storm southwest of Ft. Supply, OK in the period 0003-0016 UTC on 5/24/08. The intensifying low-level mesocyclone is evident at bottom-center by 0016 UTC. This mesocyclone, which was sampled by two NSSL mobile mesonets during its subsequent rapid intensification, eventually produced a tornado of estimated EF-3 peak intensity during the period 0109 - 0117 UTC north of Ft. Supply.

Figure 2 depicts reflectivity (left panel) and (aliased) radial velocity (right panel) at 1.2 deg elevation for the tornadic supercell storm near Hennessey, OK in the period 2310 - 2336 UTC on 5/24/08. A large, asymmetric low-level mesocyclone containing ~ 1-2 transient cores of enhanced, tornado-cyclonic azimuthal shear is evident in the reflectivity "hook echo" at lower-right.