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NWS WSR-88D Level II Data Collection and Distribution Network Information

     View the Current Levell II Data Flow from     NWS Download ARCHIVED Level II Data from NCDC NEXRAD Data Inventory
Radar Feed Monitor From NWS                    Level II Data
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What are Level II data?
Level II data are the digital radial base data (Reflectivity, Mean Radial Velocity, and Spectrum Width) and Dual Polarization variables (Differential Reflectivity, Correlation Coefficient, and Differential Phase) output from the signal processor in the Radar Data Acquisition unit. The output also includes status information required to properly interpret the data (e.g., information on synchronization, calibration, date, time, antenna position, Nyquist velocity, and operational mode). Level II data are used for many purposes including: support of operations, maintenance and developmental activities at the ROC; activities directed toward algorithm and product improvement; research by universities; and private sector uses/applications. The Level II data are sent to the National Climatic Data Center by the NWS WSR-88D Level II Central Collection, Distribution and Archive Network. Level II data are continuously transmitted and archived from all DOC and select DoD and DOT WSR-88D systems and are available via FTP download (http://www.ncdc.noaa.gov/nexradinv/choosesite.jsp). The interface control document describing the Level II format (ICD For Archive II/User – Build 12.0) is available at: http://www.roc.noaa.gov/WSR88D/Program/ICDs.aspx.

New Items

Eight WSR-88D sites (remaining DoD CONUS sites) now scheduled to be added to the NWS WSR-88D Level II Data Collection, Distribution, and Archive network 2013.