Storm tracking is a difficult science, handled by several branches of government as well as scores of private companies. The National Hurricane Center (NHC) and the National Weather Service (NWS) are departments within the National Oceanic and Atmospheric Administration (NOAA, pronounced like the name "Noah"), which in turn is under the control of the U.S. Department of Commerce (though President Obama, noting that this makes no sense, announced plans to move NOAA under the control of the Department of the Interior). Then there's FEMA, which operates under the Department of Homeland Security. All of these organizations work with companies like Weather Underground, the Weather Channel, and various laboratories and researchers and university departments. The NWS gets most of the raw data from satellites and radar, which is shared with the private companies. In turn, the private companies can get much more granular on-the-ground data, which they share with the NWS, NHC, and FEMA. It's enormously complex in the best of times, and right now is far from the best of times.