This case study deals in the first instance with a rapid cyclogenesis development over the Atlantic and its eastward movement to the British Isles. But the main feature is a delay in rapid cyclogenesis development because of the development of an upper level low in the same area. In other words, it is an example where two conceptual models act together or are superimposed, and the task is to find features for being able to separate them. Similar problems can also be found in the case study of 19 February 1997.

Another reason for the selection of this case study was the fact that the LAM numerical model forecast (HIRLAM) did not forecast the situation resulting in heavy rain over Ireland at all, or at least not in the right geographical position. Therefore it is important to look into this case study also from the viewpoint of whether satellite imagery is able to revise the wrong forecast at least for the VSRF period.