Atlantic Basin and North American Hurricane Database Re-analysis Project is digital data set DSI-9630, archived at the National Climatic Data Center (NCDC). This data set consists of a re-analysis of the Atlantic basin tropical storm and hurricane database for the period of 1851 to the present time. This re-working and extension back in time of the main archive for tropical cyclones of the North ... Atlantic Ocean, Caribbean Sea and Gulf of Mexico was necessary to correct systematic and random errors and biases in the data as well as well as to incorporate the most recent historical analyses. The re-analysis project provides the revised tropical storm and hurricane database, a metadata file detailing individual changes for each tropical cyclone, a center fix file of raw tropical cyclone observations, a collection of U.S. landfalling tropical storms and hurricanes, and comments from replies to the National Hurricane Centers Best Track Change Committee. This record also contains comprehensive information on the only hurricane that has directly impacted the California Coast (1858) and A Re-analysis of Hurricane Andrew's Intensity (1992). HURDAT (hurricane database) is the official record of tropical storms and hurricanes for the Atlantic Ocean, Gulf of Mexico and Caribbean Sea and includes those that have made landfall within the United States. This database is utilized for a wide variety of purposes: setting of appropriate building codes for coastal zones, risk assessment for emergency managers, analysis of potential losses for insurance and business interests, intensity forecasting techniques, verification of official and model predictions of track and intensity, seasonal forecasting, and climatic change studies.