The APRIL WINNER occurred over three counties in southeast Mississippi on the
evening of the 14th. A supercell thunderstorm developed over Covington county
around 1030 pm about 48 miles southeast of the radar. This compact storm had VILs
peaking in the upper 40s kg/m*m accompanied by a weak echo region and strong
rotational velocity signatures. The result was an F3 tornado that cut a path of
damage from northeastern Covington county across northern Jones county and into
southern Jasper county before dissipating. The tilted rotational structure was
quite impressive and peaked about 15 minutes after the Reflectivity structure
maximum. Severe thunderstorm warnings that had been in effect for 26
minutes were upgraded to Tornado Warnings at 1044pm in Covington county. The
4-Panel Storm Relative Velocity image and second Mesocyclone table below were
taken 15 minutes after the initial images displayed from 1042pm. The Mesocyclone
table Rank and MSI(strength index) confirmed the presence of the very intense circulation.
Finally, notice especially the time series of Storm Relative Velocity images
at the bottom which more than spans the life cycle of this tornadic supercell.
A Composite Reflectivity Image at 1042pm.
A Cell and Mesocyclone Table Analysis
A Vertical Cross Section of Reflectivity at 1042pm.
Remember, green colors are toward the radar located to the northwest and red
colors are away from the radar site.
A 4-panel Storm Relative Velocity 15 minutes later at 1057pm with
Mesocyclone Table Analysis
Here are the series of Storm Relative Velocity images
over 30 minute time frame. Click on each for a larger view.
weather.gov 
