Indexes of Hail Warning Using Weather Radar for Southwestern Mountain Region of Sichuan
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Abstract:
Based on the data from Xichang Doppler weather radar, the characteristics of 24 hail clouds from 2006 to 2013 in Liangshan are analyzed. The results show that all hail clouds have some common features: maximum reflectivity is above 50 dBz; echo top is higher than the height of －30 ℃ level; the height of 45 dBz echo top is higher than the height of －10 ℃ level; and the vertically integral liquid water is above 8 kg〖DK〗·m-2. The hail clouds can be distinguished according to such features as maximum reflectivity being above 50 dBz; echo top being higher than the height of －30 ℃ level; the height of 45 dBz echo top being higher than the height of －10 ℃ level, with a lead time of 4 min to 40 min for early warming. The vertically integral liquid water being over 8 kg〖DK〗·m-2 is not good to early identification of hail clouds. Comparison with shorttime heavy rainfall, the height of 45 dBz echo top being higher than the height of －10 ℃ level is useful for early identification of hail clouds.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.