What is the significance of the bounded weak echo region

When comparing signatures to diagnose relative severity, keep in mind that it is assumed that signatures are sampled at equal ranges from the radar. Considering all these aspects will help to determine overall whether you are dealing with a significant signature. In the context of a severe thunderstorm warning decision, a significant BWER could single-handedly provide sufficient evidence for a severe thunderstorm, based on its tight connection to storm-scale rotation.

Generally, radar information should never be used in isolation and should always be used in conjunction with the near storm environment and any reports.

If a thunderstorm has been determined to be severe and possesses a BWER of significance, the following convective hazards should be considered to be included in the severe thunderstorm warning:. The cursor location is fixed. The third frame shows the radial velocity pattern in the 7 degree PPI sweep. Divergence is clearly indicated in the echo region overlying the BWER updraft. Clicking the "Fwd" button on the control panel below the image is the best way to step through the three images.

Reflectivity is shown in the left panel; the overhanging structure associated with the BWER is evident. The right panel shows radial velocity. Significant changes in the orientation of the zero velocity line are found in the overhang region: In the further range part of the echo overhang, the zero velocity line is aligned more or less radially with respect to the radar.

This implies the rotational motion indicated by the pair of black arrows. Near the 71 km range, the alignment of the zero velocity line has re-oriented so that it is essentially perpendicular to the radar radials. The implied divergence pattern near the echo summit is indicated by the pair of red arrows. Sign in via your Institution. You could not be signed in, please check and try again. Sign in with your library card Please enter your library card number. Related Content Related Overviews thunderstorm precipitation.

Show Summary Details Overview bounded weak echo region. BWER A localized region within a thunderstorm which shows low radar reflectivity, also known as a vault.

Reference entries bounded weak echo region in A Dictionary of Weather 2 Length: 65 words. View all related items in Oxford Reference » Search for: 'bounded weak echo region' in Oxford Reference ». All rights reserved. Sign in to annotate.