On 22 May 2010, the TWISTEX mobile mesonet intercepted a tornadic supercell south of Mobridge, South Dakota. Teams followed the storm northeast as it cycled, collecting high-resolution data within multiple RFDs and associated RFDGFs over a 2 hour period. Data collected on this day includes an approximately 30 minute long RFD sampling period in close proximity to an EF-4 tornado which passed near Bowdle, SD.
An analysis of the high-resolution kinematic and thermodynamic data will be presented, and the implications for tornadogenesis and maintenance will be discussed, including:
The thermodynamic and kinematic characterization and time evolution of the RFD associated with the EF-4 Bowdle tornado, including internal RFD gradients and multiple kinematic surges within the RFD. Teams also sampled the RFD in the post-genesis but rapidly strengthening phase of this tornado.
A comparison of the thermodynamic and kinematic characteristics of various RFD surges throughout the first several hours of the storm's life. Other RFD samples from this storm included an initial non-tornadic RFD, and the RFDs associated with two other tornadic cycles both immediately prior to, and following the Bowdle tornado.