Height Contours 1000 hPa:
Compared to the theoretical structure, the low centre is not elongated much in the direction of the back bent front.
Height contours 500 hPa:
A low centre is situated above the surface low, which is typical for Warm Conveyor Belt Occlusion. Ahead of the Occlusion
there is still larger and deeper low, a usual situation for Back-Bent Occlusions.
Isotachs 300 hPa:
Two jet stream maximums: behind the Cold Front and ahead of the Warm Front, that are typical for a WCB Occlusion, can be
seen.
PVA 500 hPa:
There is a maximum of PVA around the low centre as in an Occlusion should be.
TFP:
The maximum of TFP goes with the strongest, back bent front which is already an active Cold Front. Also the remains of
Warm Front can be seen as well as the original Cold Front. The curving of the TFP field is weak, but visible in the
tail of back bent front.
Equivalent thickness:
The tongue of equivalent thickness fits to the Occlusion, albeit weak. A pronounced tongue is related to the thickness
ridge near the Cold Front.
Temperature advection 700 hPa:
There is widespread warm advection over Warm Front and warm occluded front, but also partly over Cold Front, where
frontal cloudiness is partly mixed with Thickness Ridge Clouds. The cold advection behind Cold Front and the back bent
front fits neatly to the theoretical structure.
Temperature 500 hPa:
Very cold air coming behind the high pressure tongue as is typical for Back-Bent Occlusion.