Cross-section S

There is strong upward motion just behind the region of upwards sloped isentropes. If you look at the satellite image you will see that this region coincides with the center of the occlusion spiral.

Isotachs do not show any distinct maxima.

Extremly strong positive (cyclonic) vorticity is found in the left part of the cross-section. It is the region of the center of the occlusion spiral.

Warm advection preveals in the whole cross-section with a maximum behinf the forwards sloped isentropes. This maximum, both in lower layers and near the tropopause, coincides with the center of the cloud spiral in the satellite image!

Very strong positive vorticity advection is connected to the center of the occlusion spiral. The maximum is located at about 400 hPa, but it stretches down to the ground.