Individual cells move approximately with the 850-300 mean wind during early stages of an MCS

Mean 850-300 mb wind speed

Observed cell speed during MCC genesis

25

35

30

35

30

25

20

20

15

15

10

10

5

5

0

0

r=.71

180

180

210

210

240

240

270

270

300

300

330

330

360

360

Mean 850-300 mb wind direction

r=.76

Observed cell direction during MCC genesis

From Corfidi et al, 1996

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