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| Useful Precursor Weather Conditions for Hail-Event Forecasting in the Beijing-Tianjin Region |
| YUAN Wei,SUN Jian-Qi,YU Xiao-Ding,CHEN Ming-Xuan,XIAO Xian |
| 1. China Meteorological Administration Training Centre, Beijing 100081, China;3. Institute of Urban Meteorology, China Meteorological Administration (CMA), Beijing 100089, China,2. Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029, China,1. China Meteorological Administration Training Centre, Beijing 100081, China,3. Institute of Urban Meteorology, China Meteorological Administration (CMA), Beijing 100089, China,3. Institute of Urban Meteorology, China Meteorological Administration (CMA), Beijing 100089, China |
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Abstract Hail is one of the important weather disasters that affects the Beijing-Tianjin (BT) region. To better understand and to improve the forecasting of hail events over the BT region, the precursor weather conditions for hail based on 30 previous hail events were derived. It was found that the high-level trough and low-level cold front over the Mongolian region, the accumulated convective available potential energy, the decrease of the height of the 0℃-isotherm in the morning, and the persistence and intensification of these factors from morning to afternoon are valuable clues for forecasting the occurrence of hail events over the BT region.
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Received: 19 January 2011
Revised: 12 February 2011
Accepted: 14 February 2011
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