Cause Analysis on Eastward Movement of Southwest China Vortex and Its Induced Heavy Rainfall in South China

Figure 4

As in Figure 3, but at 250 hPa and 500 hPa with the dark lines standing for troughs and the arrow for the SWV motion direction.

(a) 250 hPa at 0000 UTC 11

(b) 500 hPa at 0000 UTC 11

(c) 250 hPa at 1800 UTC 11

(d) 500 hPa at 1800 UTC 11

(e) 250 hPa at 1200 UTC 13

(f) 500 hPa at 1200 UTC 13