A thunderstorm which developed in North-Eastern region of Spain on 16th June, 2006 is analyzed. This thunderstorm could be severe because it produced hailstones larger than 19 mm. The cell life time was 3h 30 minutes. Radar cross-sections show a strong vertical development with cloud tops reaching an altitude of 13 km. During the first 3 h, in its mature stage, cloud-to-ground (CG) flash rates remained very low (under 1 min -1 ) with sometimes slightly dominant positive CG flashes. The maximum intra-cloud (IC) flash rate (67 min -1 ) peaked 24 minutes before the presence of reflectivity higher than 60 dBZ. During high reflectivity within the cloud the IC activity abruptly decreased. The maximum reflectivity observed by radar was consistent with the reported hail at ground.
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机译：分析了2006年6月16日在西班牙东北地区发生的雷暴。这次雷暴可能很严重，因为它产生的冰雹大于19毫米。细胞寿命为3小时30分钟。雷达横截面显示出强烈的垂直发展，云顶达到13 km的高度。在最初的3小时内，在其成熟阶段，云对地面（CG）的闪烁速率仍然非常低（在1 min -1以下），有时有时会出现显着的正CG闪烁。在反射率高于60 dBZ之前的24分钟内，最大云内（IC）闪速（67 min -1）达到峰值。在云内高反射率期间，IC活性突然下降。雷达观测到的最大反射率与报道的地面冰雹相一致。
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