Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh
This study examines synoptic situations of severe local convective storms (mesoscale severe weather associated with deep convections such as tornado and hail) during the pre-monsoon season (from March to May) in Bangladesh. We compared composite meteorological fields on severe local convective storm...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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John Wiley & Sons Ltd.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/13212 |
| _version_ | 1848748287339790336 |
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| author | Yamane, Yusuke Hayashi, Taiichi Kiguchi, Masashi Akter, Fatima Dewan, Ashraf |
| author_facet | Yamane, Yusuke Hayashi, Taiichi Kiguchi, Masashi Akter, Fatima Dewan, Ashraf |
| author_sort | Yamane, Yusuke |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study examines synoptic situations of severe local convective storms (mesoscale severe weather associated with deep convections such as tornado and hail) during the pre-monsoon season (from March to May) in Bangladesh. We compared composite meteorological fields on severe local convective storm days (SLCSD) with those on non-severe local convective storm days (NSLCSD). Moisture inflow from the Bay of Bengal is enhanced with intensification of southwesterly wind at 950 hPa on SLCSD compared with NSLCSD. The temperature is higher at 800 hPa over the inland area of the Indian subcontinent including Bangladesh on SLCSD than NSLCSD. At 550 hPa, a trough over Bangladesh develops on SLCSD compared with NSLCSD. This leads to the development of a thermal trough over the inland area of the Indian subcontinent and enhancement of cold advection from the northwest into Bangladesh on SLCSD at this level. This synoptic situation produces great potential instability of the atmosphere in Bangladesh on SLCSD during the pre-monsoon season. Composite distributions of lifted index, precipitable water and convective available potential energy on SLCSD and NSLCSD over south Asia show distinct differences of these parameters between these two categories with statistical significance especially in and around Bangladesh. These differences indicate that the atmospheric environment has great potential instability especially in and around Bangladesh on SCLSD under the synoptic situations shown in this study. |
| first_indexed | 2025-11-14T07:02:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-13212 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:02:39Z |
| publishDate | 2012 |
| publisher | John Wiley & Sons Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-132122017-09-13T16:04:16Z Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh Yamane, Yusuke Hayashi, Taiichi Kiguchi, Masashi Akter, Fatima Dewan, Ashraf pre-monsoon synoptic situation Bangladesh severe local convective storm This study examines synoptic situations of severe local convective storms (mesoscale severe weather associated with deep convections such as tornado and hail) during the pre-monsoon season (from March to May) in Bangladesh. We compared composite meteorological fields on severe local convective storm days (SLCSD) with those on non-severe local convective storm days (NSLCSD). Moisture inflow from the Bay of Bengal is enhanced with intensification of southwesterly wind at 950 hPa on SLCSD compared with NSLCSD. The temperature is higher at 800 hPa over the inland area of the Indian subcontinent including Bangladesh on SLCSD than NSLCSD. At 550 hPa, a trough over Bangladesh develops on SLCSD compared with NSLCSD. This leads to the development of a thermal trough over the inland area of the Indian subcontinent and enhancement of cold advection from the northwest into Bangladesh on SLCSD at this level. This synoptic situation produces great potential instability of the atmosphere in Bangladesh on SLCSD during the pre-monsoon season. Composite distributions of lifted index, precipitable water and convective available potential energy on SLCSD and NSLCSD over south Asia show distinct differences of these parameters between these two categories with statistical significance especially in and around Bangladesh. These differences indicate that the atmospheric environment has great potential instability especially in and around Bangladesh on SCLSD under the synoptic situations shown in this study. 2012 Journal Article http://hdl.handle.net/20.500.11937/13212 10.1002/joc.3460 John Wiley & Sons Ltd. unknown |
| spellingShingle | pre-monsoon synoptic situation Bangladesh severe local convective storm Yamane, Yusuke Hayashi, Taiichi Kiguchi, Masashi Akter, Fatima Dewan, Ashraf Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title | Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title_full | Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title_fullStr | Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title_full_unstemmed | Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title_short | Synoptic situations of severe local convective storms during the pre-monsoon season in Bangladesh |
| title_sort | synoptic situations of severe local convective storms during the pre-monsoon season in bangladesh |
| topic | pre-monsoon synoptic situation Bangladesh severe local convective storm |
| url | http://hdl.handle.net/20.500.11937/13212 |