gov.noaa.ncdc:C00065 National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Unknown tabular digital data http://www.ncdc.noaa.gov Cyclone Tracks - Extratropical N. Hemisphere is a historical digital data set archived at the National Climatic Data Center (NCDC). The major data variables and parameters are twelve hour positions with direction and speed of movements. The extratropical cyclone movements were digitized from NMC 6-hourly northern hemisphere cyclone position maps. However, the file only contains the 12-hourly positions. A related file is 9629 (C00290) which was prepared for all pressure centers (cyclones and anti cyclones) from the Northern Hemisphere historical map series for the period January 1899 through June 1939. To make a wide range of climatic data available to researchers and the public. U.S. Navy, Naval Weather Service Command 1974 NAVAIR 50-1c-528,1974 U.S. Navy, Naval Weather Service Command 1977 NAVAIR 50-1c-529, 1977 Klein, W.H. 1957 U.S. Weather Bureau Research Paper No. 40 Washington D.C. U.S. Weather Bureau data set C00065 National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce U.S. Navy, Naval Weather Service Command: 'Marine Climatic Atlas of the World', Volume I (revised), 'North Atlantic Ocean', NAVAIR 50-1c-528,1974; Volume II (revised), 'North Pacific Ocean', NAVAIR 50-1c-529, 1977. W.H. Klein: 'Principle Tracks and Mean Frequencies of Cyclone and Anti Cyclones in the Northern Hemisphere', Research Paper No. 40 U.S. Weather Bureau, Washington, 1957. 19650501 19741231 Ground Condition Complete As Needed -180.0 180.0 90.0 0.0 ISO 19115 Topic Category climatologyMeteorologyAtmosphere 004 oceans 014 DIF Discipline Keyword Thesaurus Earth Sciences > Atmosphere > Meteorology Earth Sciences > Atmosphere > Climatology Earth Sciences > Atmosphere > Weather Earth Sciences > Ocean > Oceanography GCMD Sciences Keyword Valids EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PHENOMENA > CYCLONES EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PHENOMENA > STORMS EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ANTICYCLONES/CYCLONES EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE GCMD Location Valids NORTHERN HEMISPHERE GCMD Location Valids SEA SURFACE LAND SURFACE TROPOSPHERE 1 None None Not provided Unknown Completeness information not available. The 6-hourly positions were digitized off the NMC Northern Hemisphere cyclone charts giving a latitude and longitude. These were then converted to the common extratropical cyclone format which only gives 12-hourly positions. If a 6-hourly position fell within a different 10-degree square than the 12-hourly positions either side of its position, then a 10- degree square was added to the record. The digitized centers were plotted back at 100 percent and laid over the original charts and checked to insure the quality of the digitizing. The direction of movements and speed were then computed based on the digitized 12-hourly positions. Also computed were the 10-degree squares. Unknown File Format Element: Record Number Position: 1-5 Element: Year of Data Report Position: 6-9 Element: Center Number Position: 10-11 Element: Month of Data Report Position: 13-14 Element: Day of Month Center Formed Position: 15-16 Element: Hour of Position Position: 17-18 Element: Indicator of Latitude Position: 19 Element: Latitude Position: 20-22 Element: Indicator of Longitude Position: 23 Element: Longitude Position: 24-27 Element: Ten Degree Square Number Position: 28-31 Element: Direction of Storm Movement Position: 32 Element: Additional 10 Degree Squares Position: 33-44 Element: Direction of Movement in Whole Degrees Position: 45-47 Element: Speed of Movement Position: 48-50 Element: Filler Blank Position: 51 None National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Customer Service Mailing and physical

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Asheville North Carolina 28801-5001 USA 828-271-4800 828-271-4876 NCDC.Orders@noaa.gov DSI-9616 Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. 20061201 20060627 National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Customer Service Mailing and physical

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Asheville North Carolina 28801-5001 USA 828-271-4800 828-271-4876 NCDC.Orders@noaa.gov Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata FGDC-STD-012-2002