Observational and Simulative Study of a Local Severe Precipitation Event Caused by a Cold Vortex over Northeast China

Figure 15

Streamlines at 950 hPa and the topography (shading indicates the topography elevation, unit: m; the red arrows indicate the northerly flow direction, the brown line represents the U-shaped topography, and the yellow rectangle indicates heavy rain in area A1): (a) 18:00 on the 27th, (b) 21:50 on the 27th, (c) 22:30 on the 27th, and (d) 00:00 on the 28th.

(a)

(b)

(c)

(d)