9th July 2004: 12UTC
In this chapter the thermal front parameter (blue) and equivalent thickness are discussed. In the first image a frontal system can be seen over eastern Europe. The cold front is situated over the Adriatic Sea, Croatia, Slovenia, Hungary and further north into Poland. The warm front is harder to discriminate just from clouds and model and was from the surface analysis placed over Finland. The occlusion point is consisting of a large convective system. Further south where a thickness ridge is seen in the warm sector between cold and warm front also numerous isolated and some large convective cells are observed.
9th July 2004: 18UTC
Situated in a thickness ridge the convective development embedded in the warm sector of a front continues. The frontal system has slowly moved eastward.
10th July 2004: 00UTC
The cell over Belarus connected to the occlusion point is slowly decreasing. The cirrus shield is nicely recognisable. In the thickness ridge in the warm sector between cold and warm front still some cells are seen. With a larger cell embedded within the cold front.
10th July 2004: 06UTC
Within the warm sector which is reflected in the equivalent thickness as a ridge also several cells are still observed.
10th July 2004: 12UTC
Due to the orographic lifting over the Carpathian Mountains more convection is about to start. This convective development is enhanced by a thickness ridge which indicates the rising warm conveyor belt. The strong signal of the TFP seen within the cells is most likely caused the thermal advection which is induced by the rising motions of these convective cells.
10th July 2004: 18UTC
Within a thickness ridge severe convective development is observed. The thermal advection induced by the rising motions of this convection is most likely causing this strong signal in the TFP also seen in the model. The eastward displacement of the frontal system seen previous is hampered by a blocking system to the east (not in this image).
11th July 2004: 00UTC
Within a thickness ridge severe convective development is observed. The thermal advection induced by the rising motions of this convection is most likely causing this strong signal in the TFP also seen in the model.
