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<br />TOOfl' " -61 00' /+1- .-5000' -4
<br />-7 +10 /+16 +11 -3 -4
<br /> /
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<br /> FCL
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<br />9
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<br />13
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<br />14
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<br />15
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<br />16
<br />
<br />/4ean echo number = 7
<br />
<br />Figure 18. Number of Thunderstorm
<br />Each Square Grid Above
<br />(1970-19'11) .
<br />
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<br />
<br />Initial Echoes Generated by
<br />the Hean of All Grid Squares
<br />
<br />,. 1"'1
<br />\,1"1
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<br />" ,,''':' " i 'I,~, ", "
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