1 Lightning Products and Services at NOAA’s National Climatic Data Center Steve Ansari, Stephen Del Greco, Neal Lott (NOAA / NCDC)

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Presentation transcript:

1 Lightning Products and Services at NOAA’s National Climatic Data Center Steve Ansari, Stephen Del Greco, Neal Lott (NOAA / NCDC)

2 Introduction Damage and Casualty Reports: –NCDC Storm Events Database Archive of the Vaisala National Lightning Detection Network (NLDN) data from 1986 to present (> 700 Million Strikes) - Joint project with USAF 14 th Weather Squadron. Raw data from NCDC is available to only Government and Military users. NCDC is developing several derived products which are freely available for all users.

3 Storm Events Database Verified reports from storm spotters, emergency management and more… 1959-present (currently 2000-present online) Damage and casualty information Narratives Pictures (coming soon)

4 Storm Events Database

5

6 Strike Data Vaisala’s National Lightning Detection Network (NLDN) 130 Sensors Nationwide, 1986 – Present Images courtesy of NASA (

7 County/State Summaries Number of cloud-to-ground lightning strikes are calculated for each day for all U.S. Counties and States. Part of the NCDC Severe Weather Data Inventory project. Currently available as CSV text reports. Web services in the future…

8 County/State Summaries Travis County, TX

9 Tile Summaries Daily strike counts in 0.10 Degree (~10 km) tiles. Part of the NCDC Severe Weather Data Inventory (SWDI) project. Accessible from SWDI RESTful (simple, URL-based) web services: –

10 Gridded Summaries 4 km Albers Equal Area grid, fit to the Continental United States. Number of cloud-to-ground lightning strikes are calculated for each day, month, year and 1986-to-present period of record Summarized by hour over month, year and period of record. Grids for only positive polarity strikes. Available in NetCDF format from FTP and THREDDS

11 Gridded Summaries Average annual strike count ( )

12 Gridded Summaries THREDDS capabilities: –XML catalog for datasets and file metadata. –Aggregation capabilities to combine many dates and variables into a single, large virtual file. –Web Services provide access as OPeNDAP, WMS (Web Map Service) and NetCDF Subset Service –NetCDF Subset Service provides simple, URL-based access to time series at specific grid cell.

13 Gridded Summaries

14 Gridded Summaries

15 Gridded Summaries

16 Gridded Summaries Many NetCDF tools exist. –IDL, MatLab, R, Ferret, NCL, GrADS, IDV, ArcGIS, GRASS-GIS, Quantum-GIS and many more. –Weather and Climate Toolkit

17 Gridded Summaries Weather and Climate Toolkit Example

18 Gridded Summaries Weather and Climate Toolkit Example

19 Gridded Summaries Weather and Climate Toolkit Example Subset by time and space Simple visualization Export to common formats for GIS and more…

20 Future Work “By Hour” county and state summaries. Web Services for county and state summaries. Improved CF-conventions for gridded NetCDF files. Online GIS Map Services and integration into Climate.gov

21 Conclusion Damage and Casualty Reports: –NCDC Storm Events Database Archive of the Vaisala National Lightning Detection Network (NLDN) data from 1986 to present (> 700 Million Strikes) - Joint project with USAF 14 th Weather Squadron. Raw data from NCDC is available to only Government and Military users. NCDC is developing several derived products which are freely available for all users.

22 Conclusion Derived products are still PROTOTYPE! Please help us guide, test and improve these products! Feedback Welcome!!! Thank You! Contact: Website: weather/lightning-products-and-serviceshttp:// weather/lightning-products-and-services