This parameter allows forecasters to monitor storm severity trends as well as the potential for large hail. As an augment to ground-truth rain gauges, these radar products are crucial in determining the potential for flooding and flash flooding from precipitating weather systems, especially thunderstorms. There are a few accuracy limitations to these products, but overall the radar usually does a very good job in determining amounts and locations of precipitation. A radar estimation of wind speeds at specific altitudes in the atmosphere as a function of time. Vertical speed shear refers to increasing wind speeds with height.
Directional shear refers to a change in wind direction with height.
However, the new training and technology certainly will continue to have a tremendous positive impact on the NWS's ability to issue timely and accurate warnings. The NWS Louisville staff uses this technology every day.