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November 10, 1997 Chase Report
 

        The Red Sea Trough was over Israel again on November 10. The forecast was for possible local thunderstorms and floodings in southern and south-eastern Israel. The most active weather that day was around Jerusalem.

    The morning was clear, with a few cirrus and cirrostratus clouds. I didn't expect any action until the afternoon hours. But in 9:30 AM I saw a crisp tower rising SW from Jerusalem. I saw a second tower to my NW. I wasn't sure if they were going to develop further, but I went after the first one, which looked much more mature. 30 minutes later it developed to a cumulonimbus (Cb no. 1) over Beit Shemesh, SW of Jerusalem. The Cb turned out to be quite a strong hailstorm.

    Back in Jerusalem, the tower which was to my NW developed to a large Cb (no. 2) which drifted fast NE. It wasn't strong, just some rain and frequent lightning. In 12:30, under it's anvil, I spotted a cluster of towering cumulus to my SE. 15 minutes later an anvil started to extend from the cluster, and a multicell thunderstorm developed (no. 3). The storm structure was not visible, unfortunately, because of the cirrostratus and altostratus that covered the sky (3 different anvils). The multicell storm was strong, with frequent CG lightning and large hail.

    Just an hour later, in 13:30, most of the anvil clouds disappeared, and 4 new cumulus congestus cells started to develop in eastern Jerusalem. 3 of them developed to thunderstorms (no. 4,5,6). The storms were weak, and did not produce severe weather. By 15:50 all that remained from the last Cb that developed was a small decaying anvil.

 

David Shohami, 1997