Multicell Cluster

Decorative Image: This image is a display from the NWS WSR-88D radar showing a multi-cell cluster of showers and thunderstorms.

Training Echoes

Speaker Notes:

• The image on the left is a display from the NWS WSR-88D radar showing a multi-cell cluster of showers and thunderstorms. Each cell in the cluster is circled. Notice these storms are moving northeast, and not west to east. As a result, those areas in the path of these storms will see one storm after another, just like a train moving over a train track. These ‘training echoes’ can produce multiple inches of rain across the path of these storms resulting in flash flooding.

• Flash flooding is the number one storm-related killer in the United States. The next three slides discuss flood safety.