Reflectivity of the supercell that produced the Moore, Oklahoma tornado on May 3, 1999. At the time of this radar scan, a tornado was on the ground. Image courtesy NWS. A tornado is a violently ...

It could also be augmented with other data sources, like satellite imagery or lightning maps ... precursors to tornadoes—an increase in low-level rotation, a hook echo in reflectivity data ...

The Local Radar base reflectivity product is a display of ... allows us to issue tornado warnings with more advanced notice. The National Weather Service's 148 WSR-88D Doppler radars can detect ...