In the IR images the same two frontal cloud bands can be identified as before. They are already much closer to each other at 09.00 UTC (left image) and finally have merged at 12.00 UTC (right image). The Warm Front cloud band is still very bright and accompanied by thunderstorms and rain in the Aegean Sea and on the Peloponnesus. The cloud band of the Cold Front in Cold Advection consists only of lower cloud tops and its weather intensity is decreasing. At 12.00 UTC it extends from the Black Sea across north Greece westward. VIS images confirm that the warm front is accompanied by a thick cloud band with a rather smooth texture, while the northern Cold Front cloud band consists only of single cloud patches around 42N/31E, 41N/25E and 40N/21E and very small scale cold air cells with snow at their rear over Bulgaria. The WV images showing a grey warm front band add the information that there is a rather humid troposphere above the Cold Front in Cold Advection. But the most striking feature in the WV imagery is the black WV eye (compare Conceptual Models: Water Vapour Vortices ) in the Mediterranean south of Sicily, representing very dry sinking air. It is, however, not discussed in detail in this case study.