Information AboutBow Echo |
| CATEGORIES ABOUT BOW ECHO | |
| storms | |
| severe weather and convection | |
| weather hazards | |
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RESEARCH The term bow echo was first used by s. They determined that bow echoes were most likely to occur in weakly organized cells.http://www.meted.ucar.edu/mesoprim/severe2/ In 2007, from February 28 to March 1, there was a Midwest Bow Echo Workshop, where meteorologists gathered to share their research and finding with each other to better understand bow echoes.http://www.crh.noaa.gov/lmk/?n=bowechoworkshop FORMATION A bow echo is associated with . Rear inflow jet The formation of a bow echo requires a strong elevated rear inflow jet at mid-levels. The strength of the cold pool and mesohigh at the surface as well as warmer temperatures aloft due to convection works to create a mesolow at mid-levels which strengthens the jet. Upon reaching the edge of the convection the jet descends and spreads along the surface, generating Straight-line Winds .http://www.meted.ucar.edu/mesoprim/severe2/ Book end vortices After the rear inflow jet has bowed the storm system then on book end or line end vortices develop on either side of the jet. These vortices are similar in strength.http://amsglossary.allenpress.com/glossary/search?id=bow-echo1 Due to the small size of the bow echo, the vortices help enhance the mid-level flow between them. This strengthens the rear inflow jet. The surface winds increase from the descending jet.http://www.meted.ucar.edu/mesoprim/severe2/ As the life of the storm increases, the es or Gustnado es develop within these vortices. s. Arrows indicate wind flow relative to the storm. Note regions of Cyclonic rotation (C) and Anticyclonic rotation (A); both regions, especially C, are capable of supporting tornado development in some cases.]] WHERE DO THE STRONGEST AND MOST DAMAGING WINDS OCCUR IN A BOW ECHO? Damaging straight-line winds often occur near the center of a bow echo. To give you an idea of how much damage can occur from a bow echo, damage from all severe thunderstorm winds account for half of all severe reports in the lower 48 states and is more common than damage from tornadoes. Wind speeds can reach up to 100 mph (160 km/h) and can produce a damage path extending for hundreds of miles.http://www.nssl.noaa.gov/primer/wind/wind_basics.html# '''Bow Echoes''' are capable of producing straight-line that are just as strong. In fact, a strong bow echo will produce more widespread and intense damage than the majority of tornadoes. Also, '''bow echoes''' create a favorable environment for tornadoes to form. If you hear that a bow echo is heading your way, watch out; the damage could be deadly. SEE ALSO REFERENCES EXTERNAL LINKS
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