30th July 2005: 06UTC
In the image the thermal front parameter (blue) and the relative topography (green) are superimposed on IR10.8 imagery. The location and orientation of the frontal system is easier with these parameters. The warm front can now be recognised over the Baltic Sea and Lithuania, further west the occlusion (hardly any TFP) over Sweden, Denmark and the North Sea. The cold front is also well observed with a pronounced TFP maximum. Ahead of this front a second TFP maxima is found where the future convection line will develop. The thermal advection induced by the rising motions is most likely causing this strong signal in the TFP.
30th July 2005: 12UTC
On the leading edge of the cold front (Switzerland) the first signs of prefrontal convergence can be seen. A weak thickness ridge is seen over Bavaria and the Czech Republic. The increase in thickness gradient was also observed in the previous chapter as an increase of windspeed was observed over these areas. Further north a second thickness ridge marks the location where a MCS emerges in Latvia. The convergence line is still marked by several TFP maxima because of the thermal advection associated to convection.
30th July 2005: 18UTC
Over the Baltic States a large MCS is recognised. It developed in a thickness ridge. A TFP maximum is superimposed. Further down south a long line of convective cells is seen also marked by TFP maxima. Embedded within the front an other large convective area is covering Bavaria and parts of the Czech Republic. A weak thickness ridge accompanies it.
31st July 2005: 00UTC
Embedded within the front two MCS are observed. One is found over Belarus and Russia. A second one is found south and is covering Poland and parts of Austria, Slovakia and the Czech Republic. Both of them are accompanied by a thickness ridge and also important TFP maxima due to thermal advection caused by the convection.
31st July 2005: 06UTC
The convective cell formerly seen over Poland has decreased in size and shifted eastward towards the Baltic States and Belarus. A weak thickness ridge reflects it.
