Regional climate models are very important climate research tools available to scientists from developing countries. The ICTP Physics of Weather and Climate (PWC) group maintains and distributes a state-of-the-art regional climate model (RegCM), which is currently used by a wide research community for a range of studies. This community forms the basis of a regional climate research network (RegCNET) aimed at developing research projects related to climate change issues over different regions of the world. The workshop is intended to provide lectures and hands-on sessions on the theory of regional climate change and regional climate modeling as well as the use of the RegCM modeling system. The workshop will also provide a forum for current and future participants to the RegCNET to review and discuss their project results and plans. A limited number of participants is envisioned, with proven experience in atmospheric modeling and a strong interest in regional climate studies. The workshop will cover the following topics: - The physical processes that regulate regional climates; - Climate change at the regional scale; - Uncertainties in regional climate change projections; - Regional climate modeling; - The ICTP-PWC regional climate model (RegCM); - Current applications of the RegCM.