WER

Weak Echo Region. Radar term for a region of relatively weak (reflectivityat low levels on the inflow side of a thunderstorm echo, topped by stronger reflectivity in the form of an echo overhangdirectly above it (see picture). The WER is a sign of a strong updrafton the inflow side of a storm, within which precipitation is held aloft. When the area of low reflectivity extends upward into, and is surrounded by, the higher reflectivity aloft, it becomes a BWER.