The Nowcasting Lab is an automated code-database-website environment for GDP forecasting. It generates nowcasts and one-quarter ahead forecasts for quarterly GDP growth of currently 12 European countries and the euro area using several forecasting models and a large amount of data. The projections are updated daily and released on a website together with detailed additional information. Forecast practitioners can use the website as an extended arm for their work. Researchers can use the lab to monitor and test new forecasting models in a true out-of-sample environment. All projections and input data are stored in a daily vintage real-time database which can be used for real-time forecasting studies. As an application, we analyze the performance of the GDP forecasting models during the COVID-19 crisis.