2018年5月6日余江局地冰雹大风过程分析
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摘要
利用常规天气资料、自动站资料、雷达拼图等资料,对2018年5月6日余江县局地冰雹大风短时强降水过程进行分析,结果表明:"5.6"局地冰雹和雷暴大风过程是由500 hPa高空槽、低层切变线以及西南急流等因素共同作用下造成的。在雷达回波上表现为飑线回波带和超级单体回波。回波在850 hPa切变线附近产生,沿700 hPa偏西风的引导气流,自西向东移动,过程中不断发展加强,从而影响余江县。
By using conventional weather data, automatic station data and Radar Mosaic data, the short-term heavy precipitation process of local hail gale in Yujiang County on May 6, 2008 was analyzed. The results show that the local hail and thunderstorm gale processes on May 6, 2008 are caused by the combined action of 500 hPa upper trough, low-level shear line and southwest jet. Squall line echo band and supercell echo are shown in radar echo. The echoes are generated near the 850 hPa shear line, moving from west to east along the westerly guiding airflow of 700 hPa, and developing and strengthening continuously in the process, thus affecting Yujiang County.
By using conventional weather data, automatic station data and Radar Mosaic data, the short-term heavy precipitation process of local hail gale in Yujiang County on May 6, 2008 was analyzed. The results show that the local hail and thunderstorm gale processes on May 6, 2008 are caused by the combined action of 500 hPa upper trough, low-level shear line and southwest jet. Squall line echo band and supercell echo are shown in radar echo. The echoes are generated near the 850 hPa shear line, moving from west to east along the westerly guiding airflow of 700 hPa, and developing and strengthening continuously in the process, thus affecting Yujiang County.
引文
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[2] 姚日升,涂小萍,杜坤,等.两次冰雹过程别渐层气象要素变化特征[J].高原气象,2015,34(6):1677-1689.
[3] 金米娜,陈云辉,许爱华,等.2013年3月19日江西省冰雹天气成因分析[J].暴雨灾害,2013,32(2):158-166.
[4] 魏慧娟,方向明,贾文秀.驻马店一次冰雹天气过程的诊断分析[J].安徽农业科学,2011,39(31):19453-19456.
[5] 王华,孙继松,李津.2005年北京城区两次强冰雹天气的对比分析[J].气象,2007,33(2):49-56.
[6] 闵晶晶,刘还珠,曹晓钟,等.天津“6.25”大冰雹过程的中尺度特征及成因[J].应用气象学报,2011,22(5):525-536.
[7] Williams E R,Weber M E,Orville R E.The relation—ship between lightning type and convective state of thunderclouds[J].Geophys Res,1994,13:213-220.
[8] Changnon S A.Temporal and spatial relations between hail and lightning[J].Appl Meteor,1992,31:587-604.