In the chapter of the diagnosis of conceptual models for 02 August at 06.00 UTC (compare Overview of satellite imagery for 02 August 06.00 UTC) the conceptual model Rapid Cyclogenesis was acceptable over the Atlantic west of Ireland (approximately 50N/30W). But there were some discrepancies to the behaviour of key parameters in the ideal case. These differences referred especially to a weaker surface trough and WA maximum. This chapter deals with further development of the rapid cyclogenesis, as well as other conceptual models in this area, till 03 August at 18.00 UTC.