In the first image of the sequence a broad cloud band is spreading from Ukraine down to Greece and South Italy. At the leading edge of the cloud band, over Bulgaria, a big convective cell with very cold cloud tops can be observed.
Convective cell within the frontal cloud band intensifies. Over Greece and western Turkey convective development is triggered due to the orography in the south-westerly flow ahead of the front.
Cells over Greece and western Turkey are developing further in the strong uplift forced by the orography. The big convective cell at the leading edge of the frontal zone has further increased.
Further intensification of the frontal cloud band occurs. Most of the cells within the frontal zone are merging into large MCSs. The cells appear bright/white due to cold cloud tops consisting of ice particles.
Further merging within frontal zone and few large MCSs can be observed. Convection over the Greek coast and western Turkey is also clearly visible.
Development within the front continues.
Development within the front continues.
The entire frontal cloud band is now white - cold cloud tops. Decay of the cells over Turkey occured in the last hour.
Development within the front continues even further. The cells over Turkey have dissapeared.
The cold front with highly developed cloudiness reaches north-western Turkey. A new development ahead of the front can be noticed.
Convective cell developing ahead of the front is expanding.
Development ahead of the front continues, whereas the large convective system within the front is getting weaker.
The level of convection within the front decreased. In the south-westerly stream ahead of the front a large convective system developed near Ankara.
Clouds within the frontal cloud band are slowly dissolving. The big convective system near Ankara is intensifying.
The cold front moves further to the east. Grey-shades of the clouds within the frontal cloud band are getting less bright. Further development near Ankara induced by orography is witnessed.
Development ahead of the front continues. The first sign of weak convective development can be noticed over eastern Turkey.
Development ahead of the front continues. The first sign of weak convective development can be noticed over eastern Turkey.
Development ahead of the front continues. The first sign of weak convective development can be noticed over eastern Turkey.
Convective cell near Ankara region is slowly getting weaker and merging with the front.
The front approached Ankara and a weak convective cell merged with it.
The cold front moves further to the east. Isolated Cbs are recognised over south-eastern Turkey.
The convection over eastern Turkey intensifies. High reaching Cbs can be recognized as numerous bright white spots.
The increasing level of convectivity over eastern Turkey is more evident. This development is caused by an upper level low which is not clearly visible in the infrared images. Better overview of the upper level structure can be gained from the WV channel.
The development continues. New convective cells appeared just ahead of the frontal zone.
The convection over western Turkey increases, as well as the cell within the frontal cloud band. Convective cells ahead of a well-developed cold front formed a recognizable line.
The large bright area within the cold front across Turkey indicates strong convective development. Individual cells in the squall line ahead of the frontal zone have increased further. The increasing level of convectivity over eastern Turkey is also evident.
The prefrontal convective cells have merged with the convective cells in the front forming a large cluster of convective cells covering central Turkey. Development within the upper-level low over eastern Turkey continues.
Two separate convective regions, one over central Turkey, the other over eastern Turkey are approaching each other. Between this two big convective areas new cells are developing.
Two large areas of convection merged into one covering central and eastern Turkey.
Two large areas of convection merged into one covering central and eastern Turkey.
The convection has weakened and the IR grey-shades over eastern Turkey have become less bright. More to the west, convective cells can still be recognised embedded into the frontal cloudiness.
The level of convectivity has weakened and the IR grey-shades over eastern Turkey have become less bright. More to the west, still new convective cells can be recognised embedded into the frontal cloudiness. Some new convective development can be noticed behind the frontal cloudiness.
Most of the cells within the front have merged forming another large MCS over north-eastern Turkey.
The level of convectivity has weakened and the IR signal over central Turkey has become weaker. The size of the MCS over north-eastern Turkey is also decreasing.
The IR signal over central Turkey has become weaker as the frontal cloud band is slowly dissolving. The size of the MCS over north-eastern Turkey is also decreasing.
The system is dissolving.
Convective development over Turkey is reaching its end phase and the clouds appear more grey in the satellite image.