Re-evaluation of moisture sources for the August 2002 extreme rainfall episode in central Europe: Evaporation from falling precipitation included in a mesoscale modeling system

•A new technique can evaluate and map moisture sources of a target rainfall.•For the first time, both surface evaporation and virga can be estimated.•Virga accounted for the 18% of the target rainfall in central European floods.•Main fraction of virga contribution took place over land, near the target region.•Time scales of surface evaporation (6–7days) exceeded those of virga (2days).