2009年6月26日浙江出現全省范圍的雷暴天氣，此次過程中出現的地閃頻數是自2006年閃電定位系統建立以來出現最多的一次。利用閃電定位實測資料、加密雨量站雨量實況以及多普勒天氣雷達產品，對這一過程的地閃特征進行了分析。結果表明：此次地閃以負地閃為主，負地閃廣泛分布于25～55 dBz雷電回波區域內，而正閃多出現在25～35 dBz回波中；地閃多出現在回波發展和前進的一側，且密集分布在回波的梯度最大處，強回波中心處地閃較少出現；在回波開始減弱到中心強度為35 dBz左右的區域沒有地閃發生。地閃頻數與全省過程累積降水量有很好的相關性,地閃的出現及其頻數的增加意味著影響某地的強對流風暴正在發展或正向本地移來，對于單站來說雨強峰值滯后于地閃頻數峰值半個小時以上，對于全省累積降水量則提前1～2 h。因此地閃資料可以作為強對流天氣的短時強降水預報的預警依據。
A wholeprovince range thunderstorm occurred in Zhejiang Province on 26 June 2009, and the occurrence frequency of cloudtoground lightning in this thunderstorm is the highest since the establishment of the lightning position system in 2006. By means of the observation data from the lightning position system, the intensive rainfall observation system, and Doppler radar, the characteristics of the cloudtoground lightning process are analyzed. The results indicate that lightning strokes were mainly negative; in the lightning echo image, negative strokes were mostly distributed in the area of 25 dBz to 55 dBz, and positive strokes were usually in the area of 25 dBz to 35 dBz; lightning strokes occurred mostly on the side of echo development or advancement, distributed around the area with maximum gradients, and there seldom appeared lightning strokes around a strong echo center; the frequency of cloudtoground lightning was correlated closely with the accumulated precipitation of the whole province during the thunderstorm. The peak value of precipitation lagged more than 0.5 hour behind the peak value of the frequency of cloudtoground lightning, and the accumulated precipitation of the whole province occurred 1 to 2 hours behind the peak value of the frequency of cloudtoground lightning. Therefore, the cloudtoground lightning data can be used as a basis in shortrange severe precipitation forecasting.