The 2013 GOES-R Geostationary Lightning Mapper (GLM) science team meeting was held September 24-26 at the University of Alabama in Huntsville/NASA Marshall Space Flight Center (MSFC) facility in Huntsville, AL. A broad representation of research and operational scientists (in-person or via Webex) from NOAA NESDIS, GOES-R, National Weather Service (NWS), Office of Atmospheric Research (OAR), NASA, Instituto Nacional de Pesquisas Espaciais (InPE Brazil), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), universities, and NWS commercial data providers participated. Sessions and presentations addressed lightning science and forecast/warning applications, forecaster use of total lightning at the Proving Grounds, calibration/validation and proposed field campaigns (national and international), and training.https://web.archive.org/web/*/http://www.goes-r.gov/users/2013-GLM.html