Synoptic Development
The surface charts and the infrared satellite images from 8 - 12 February 2010 give an overview of the shifting of the Mediterranean low during the five days.
Figure 3.1: ECMWF Surface chart 8 February 2010 1800UTC - 13 February 2010 0000UTC
Figure 3.2: Meteosat 9 IR10.8: 10 February 2010 0000UTC to 12 February 23:30UTC
The development of the depression started in Spain. The trough moved in the direction of the upper air flow eastward to Italy within two days. Because of the blocking situation over Europe the trough remained almost constant over Italy between Feb, 10th and Feb, 11th. During the night from Feb, 11th to 12th the corresponding occlusion dissipated and a new front system was formed over Sicily, because of anew cold air advection from an upper level low over the Mediterranean Sea. But this frontal system did not influenced Austria, because on Feb, 12th 2010 the depression weakened and moved further to the east toward the Balkan.
To discuss the weather event in more detail, concentration on the important days is necessary!