The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an op-erational model implemented at the National Centers for Environmental Prediction (NCEP)of the National Weather Service (NWS) to provide numerical guidance to the National Hur-ricane Center for the forecasting of tropical cyclones’ track, intensity, and structure. HWRFv3.7a and this Users’ Guide contain the capabilities of, and information regarding, the operational 2016 implementation of HWRF, as well as alternate and research congurations ofthe modeling system.
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