The chaff is seen on the radar as narrow bands of high reflectivity embedded in areas of weak reflectivity. Echoes from weather presumed to be free of chaff can be seen to the southwest at the100 nmi range. As these cells grew, they began to appear very similar to the chaff-infected echoes. The two highest tilts show the typical elongated chaff structure in the absence of background weather echoes. Note the cell number icons generated by the NSSL cell identification algorithm as a result of the chaff.
Close inspection reveals that no single chaff echo appears on more than two consecutive tilts.
Cells 2 and 6 appear on the 0.5 and 1.5 deg tilt, Cell 3 appears on the 1.5 and 2.4 deg tilts, and Cell 5 is seen on the 2.4 and 3.4 deg tilts. Some of the hybrid echoes triggered NSSL's hail detection algorithm. Figure 4 illustrates the difficulty in determining whether or not echoes have been affected by chaff. At 2051 UTC, it appears that most of the chaff was exiting the east part of the radar domain. Thus, it is inconclusive whether or not chaff remains in these echoes.