Lightning Products and Services
Damage and Casualty Reports
Damage and casualty reports are available from the NCDC Storm Events Database.
Raw Flash Data Access
The raw data from NCDC are available only to government and military users. Please email firstname.lastname@example.org to request access and documentation.
The number of cloud-to-ground lightning flashes is summarized for each day in 0.10-degree tiles. These tiles are part of the NCDC Severe Weather Data Inventory and are accessible from a basic Google Maps-based search tool as well as simple, URL-based RESTful web services.
County and State Summaries (PROTOTYPE)
The number of cloud-to-ground lightning flashes is calculated for each day for all U.S. counties and states. These summary reports are generated as part of the NCDC Severe Weather Data Inventory, and they contain counts of severe storm attributes detected by algorithms in the NEXRAD Weather Radar network. The summary reports are in CSV text format and are available via FTP or HTTP.
Gridded Summaries (PROTOTYPE)
The number of cloud-to-ground lightning flashes is calculated for each day, month, and year as well as for the 1986-to-present period of record. Additionally, the number of flashes is calculated for each hour and summarized by month, year, and period of record. Grids are also created to show only positive polarity flashes for all time periods. The summary grids are defined as a 4 km Albers Equal Area grid, fit to the continental United States, and are available in NetCDF format from FTP and THREDDS.
The THREDDS Data Server provides aggregations to efficiently organize the many data files into single virtual files representing multiple variables and times merged together. Web services are available to access the Gridded Summaries using OPeNDAP, WMS, and WCS. The NetCDF Subset Service allows the download of geographic and temporal subsets in the NetCDF format as well as single grid cell time-series extraction in CSV, XML, or NetCDF formats.