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CIRA scientists located in Miami, FL, work with the National Hurricane Center (NHC) to help to facilitate the Hurricanes and Ocean Testbed (HOT) by coordinating with developers supported by the HOT and assisting with real time product demonstrations and evaluations. They also work with NHC forecasters and technical staff on evaluation of model upgrades, including the National Weather Service global model (Global Forecast System, GFS) and regional hurricane models such as the new Hurricane Analysis and Forecast System (HAFS). CIRA staff at NHC also help to update and improve existing operational guidance models run by NHC including their wind speed probability model and several statistical models for intensity forecasting, with emphasis on increased use of satellite data and more advanced machine learning techniques.