Relative Humidity:
The zone of high humidity is ahead of the frontal zone, and has moved clearly away from the frontal zone on the higher levels. Also dry air from behind extends well into the frontal zone.
Temperature Advection:
The frontal zone is within cold advection. There is practically no warm advection ahead of it, because the cyclone is well occluded and the warm sector has almost vanished. The warm advection above the frontal zone is strong.
Divergence:
There is strong convergence within the frontal zone and divergence above it, which is consistent with the model of fronts.
PVA:
The frontal zone is within positive vorticity advection with the maximum near the tropopause. This structure is typical for Cold Fronts.
Vorticity:
The maximum can be found in the upper part of the frontal zone
Height of PV:
Stratospheric values of PV (>1.5 units) can be seen immediately behind the higher level cloudiness of the front, reaching down as far as 400 hPa.