CASE STUDY OF A SERIES OF SEVERE CONVECTIVE STORMS BASED ON CHINA NEW GENERATION (DOPPLER) WEATHER RADAR DATA

Liao Yufang; Yu Xiaoding; Guo Qing

Vol.14, NO.6, 2003

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2003 > 14(6): 656-662

Liao Yufang, Yu Xiaoding, Guo Qing. Case study of a series of severe convective storms based on China new generation (Doppler) weather radar data. J Appl Meteor Sci, 2003, 14(6): 656-662.

Citation:

Liao Yufang, Yu Xiaoding, Guo Qing. Case study of a series of severe convective storms based on China new generation (Doppler) weather radar data. J Appl Meteor Sci, 2003, 14(6): 656-662.

Liao Yufang, Yu Xiaoding, Guo Qing. Case study of a series of severe convective storms based on China new generation (Doppler) weather radar data. J Appl Meteor Sci, 2003, 14(6): 656-662.

Citation:

Liao Yufang, Yu Xiaoding, Guo Qing. Case study of a series of severe convective storms based on China new generation (Doppler) weather radar data. J Appl Meteor Sci, 2003, 14(6): 656-662.

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CASE STUDY OF A SERIES OF SEVERE CONVECTIVE STORMS BASED ON CHINA NEW GENERATION (DOPPLER) WEATHER RADAR DATA

1.
Changde Weather Office, Hunan Province 415000
2.
CMA Training Center, Beijing 100081

Received Date: 2002-08-09
Rev Recd Date: 2003-03-10
Publish Date: 2003-12-31

Abstract

Abstract

Three severe convective storms occurring between 19:00 and 21:00 on 14 May 2002 in Changde area, Hunan Province are analyzed based on the new generation (Doppler) weather radar data. These severe storms led to heavy damage, producing wind gust as high as 26 m/s, 30 mm diameter large hails and tornado, in consistency with the radar observations. Among the three convective storms, two are supercell storms and one is squall line. The mesocyclones associated with the two supercells are identified. Both supercell storms produce the Three-Body Scatter Spike (TBSS), with the value of the reflectivity core over 70 dBz. A TWS (Tornadic Vortex Signature) associated with the second supercell storm is identified. Both the Three-Body Scatter Spike (TBSS) and Tornadic Vortex Signature (TVS), associated with large hails and tornado, respectively, have been observed for the first time in China, and large hails and tornado have been confirmed by the surface reports. Research results indicate that the TBSS can be used as a nowcasting index of large hails and high wind.
- New generation weather radar;
- Supercell storm;
- Tornadic vortex Signature (TVS);
- Three-Body Scatter Spike (TBSS);
- Large hail

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References(6)

Figures and Tables

图 1 强对流发生前的天气背景示意图

(粗实线和虚线分别为500 hPa和700 hPa槽线；实心和空心箭头分别为500 hPa和700 hPa急流位置；三角形为强对流天气发生的大致区域)

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图 2 宜昌站2002年5月14日08:00速度矢端图

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图 3 对流风暴生消路径图

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图 4 2002年5月14日19:05湖南常德CINRAD-SB雷达观测资料

(距离圈间距为50km，方位角划分线间隔30°，石门县位于雷达西北方58km处) (a) 和 (b) 分别为1.5°和3.4°仰角基反射率因子图，(c) 和 (d) 为1.5°乎6°。仰角的基速度图，(c) 为沿330°径向的反射率因子剖面（负速度代表离开雷达，正速度代表朝向雷达）

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图 5 2002年5月14日19:23湖南常德CINRAD-SB雷达观测资料

(距离圈间距为50km，方位角划分线间隔30°，澧县县位于雷达北方55km处) (a) 和 (b) 分别为1.5°和3.4°仰角基反射率因子图，(c) 和 (d) 为相应仰角的基速度图

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图 6 2002年5月14日20:13湖南常德CINRAD-SB雷达观测资料

(距离圈间距为50km，方位角划分线间隔30°，桃源县泥潭位于雷达西南方60km处) (a)、(b) 和 (c) 分别为1.5°、2.4°和3.4°仰角基反射率因子图，(d)、(e) 和 (f) 为1.5°、2.4°和6°仰角的基速度图，(g) 为沿220°径向的反射率因子剖面

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图 7 造成三体散射长钉 (或火焰回波) 的雷达信号路径示意图

(点C处的阴影代表造成该回波假象的大于60 dBz的反射率因子核心 (引自文献[5]))

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