The first image shows a typical situation for a cold front. The zero line of temperature advection is situated at the leading edge of the front.
24 Nov 2005, 06 UTC
The area of cellular cloudiness behind the front is characterized by strong cold air advection.
24 Nov 2005, 12 UTC
The maximum amount of cold air advection over the North Sea was connected to the Comma.
24 Nov 2005, 18 UTC
The situation at 18 UTC shows maxima of warm air advection over France and South Norway. Strong cold air advection occured behind the cold front. The extremum of cold air advection in conection to the comma moved during the last 6 hours to the east coast of England.
25 Nov 2005, 00 UTC
Warm air advection was clearly situated in the merging area between the comma and the frontal cloud band (about 55°N/5°E).
25 Nov 2005, 06 UTC
Warm air advection coincided with the occlusion of the cloud spiral. Over Germany cold air advection can be observed in the rear of the cold front.
25 Nov 2005, 12 UTC
Warm air advection was connected with the western part of the occlusion spiral and intensified. This induced probably upward motion and cloud intensification. Cold air advection occured further to the East.
25 Nov 2005, 18 UTC
Warm air advection can be seen in relation to the occlusion. These structures moved slowly to the South.
26 Nov 2005, 00 UTC
The advections' intensity decreased during the last 6 hours indicating the end of this severe weather situation.
