Some synoptical and dynamical quantities attain in this point, such as the mean sea level pressure and its anomaly, 500-hpa geopotential anomaly, relative vorticity advection and thermal vorticity advection and thickness advection.
Figure 5 shows the thermal vorticity advection of 500 hpa geopotential in the selected cases for the representative point.
But their relative vorticity advection and thermal vorticity advection are considerable.