Case analysis of Gudrun
Plot of system relative winds at 850mb, with contours of wet-bulb potential temperature at the same level, both at 4Z on 8 January 2005. Regions of strong winds labelled: sting jet (SJ), two components of the cold conveyor-belt (CCB1 and CCB2) and the warm conveyor-belt (WCB).
Trajectories were calculated from the sting jet region at 4Z on 8 January, back to 16Z on 7 January. The following figures show the positions of the trajectories at given times relative to the cloud head (shown by contours of relative humidity).
Sequence of system-relative winds at 850mb between 0Z and 9Z on 8 January 2005, with contours of relative humidity at 650mb. The red boxes show the (approximate) location of the sting jet.