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Synoptic features and environmental conditions of the tornado outbreak on March 22, 2013 at Brahmanbaria in the east-central region of Bangladesh

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  • Fatima Akter
  • Hirohiko Ishikawa

Abstract

This study evaluates the synoptic features and environmental conditions of Brahmanbaria tornado event that caused 36 fatalities, 388 injuries and huge damages of properties on 22 March, 2013. Various factors for initiation of that terrific event are investigated through analysis JRA-55 reanalysis (50 km horizontal resolution) data and Multi-functional Transport Satellite images by Japan Meteorological Agency. In addition, radar images, radiosonde data and three hourly synoptic data of Bangladesh Meteorological Department are used to verify the reanalysis data. The genesis of the tornadic storm is identifiable in the most unstable part of the study region. The satellite observations are found to useful to identify the location of convection occurrence region. The half hourly satellite images identify that the convection initiation started at the convergence area and the systems intensify and organize by the continuous moisture supply from the Bay of Bengal. Lower-level convergence coupled with strong wind shear and humidity gradient lift moist air aloft to trigger deep convection and the severe storm occurred. Energy Helicity Index seems a good predictor parameter for this specific case study. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • Fatima Akter & Hirohiko Ishikawa, 2014. "Synoptic features and environmental conditions of the tornado outbreak on March 22, 2013 at Brahmanbaria in the east-central region of Bangladesh," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(3), pages 1309-1326, December.
    • Handle: RePEc:spr:nathaz:v:74:y:2014:i:3:p:1309-1326
    DOI: 10.1007/s11069-014-1252-y
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    Cited by:

    1. Mohan Das & Md. Chowdhury & Someshwar Das & Sujit Debsarma & Samarendra Karmakar, 2015. "Assimilation of Doppler weather radar data and their impacts on the simulation of squall events during pre-monsoon season," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 77(2), pages 901-931, June.
    2. José F. León-Cruz & Noel Carbajal & Luis F. Pineda-Martínez, 2017. "Meteorological analysis of the tornado in Ciudad Acuña, Coahuila State, Mexico, on May 25, 2015," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 89(1), pages 423-439, October.

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