HRC conducted a hands-on workshop to train agency forecasters and disaster managers on the interpretation of the products and the use of the interactive interface of the Urban Flash Flood Warning System (UFFWS). The workshop was held from 16-17 April 2019 at the AKOM (Disaster Coordination Center – Istanbul Metropolitan Municipality) Headquarters in Istanbul, Turkey. The UFFWS was implemented for the Cendere Basin of Istanbul by HRC, as an enhancement of the operational Black Sea and Middle East Flash Flood Guidance System (BSMEFFGS). The workshop was organized by HRC and the Turkish State Meteorological Service (TSMS, the Regional Center for the BSMEFFGS). The participants were from the TSMS, AKOM, ISKI (İstanbul Water and Sewerage Administration – Istanbul Metropolitan Municipality), and DSI (Turkish State Hydraulic Works).