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Steve Ansari, Stephen Del Greco, Brian Nelson, Helen Frederick NOAA / NCDC

The Severe Weather Data Inventory (SWDI): Spatial Query Tools, Web Services and Data Portals at NOAA’s National Climatic Data Center. Steve Ansari, Stephen Del Greco, Brian Nelson, Helen Frederick NOAA / NCDC. Goals. Inventory for Severe Weather Data Geospatial Database solution Modular!

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Steve Ansari, Stephen Del Greco, Brian Nelson, Helen Frederick NOAA / NCDC

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  1. The Severe Weather Data Inventory (SWDI):Spatial Query Tools, Web Services and Data Portals at NOAA’s National Climatic Data Center Steve Ansari, Stephen Del Greco, Brian Nelson, Helen Frederick NOAA / NCDC

  2. Goals • Inventory for Severe Weather Data • Geospatial Database solution • Modular! • Unique spatial dataset relationship • Multiple user access methods

  3. Data NEXRAD Level-III • Hail, Mesocyclone, and Tornado • Data from 1991 – Present • Estimates for hail size, wind shear, heights, etc… • All searchable!

  4. Data NEXRAD Level-III Hail Product

  5. Data NEXRAD Level-III Mesocyclone Product

  6. Data NEXRAD Level-III Tornado Product

  7. Data NEXRAD Level-II • Generate products with WDSS-II • Hail, Mesocyclone, and Tornado • Different Algorithms (NSSL vs. NWS) • Reprocess Data from 1991 – Present • 1000 terabytes!

  8. Data NEXRAD Level-II – WDSS-II Display Image courtesy of Travis Smith, NSSL/CIMMS http://www.wdssii.org

  9. Data NCDC Storm Events Database • Text reports from NWS and Storm Prediction Center. • Data from 1950 – Present • Tornado, Hail, Lightning, Wind, etc… • Fatalities, Injuries, Crop/Property Damage

  10. Data NCDC Storm Events Database

  11. Data Vaisala’s National Lightning Detection Network (NLDN) • 130 Sensors Nationwide • 1995 – Present Images courtesy of NASA (http://thunder.msfc.nasa.gov/primer/primer3.html)

  12. Process

  13. Geospatial Database • Oracle Spatial Extension • Adds GIS functionality to Oracle database • Links all spatial datasets together + “Select all NLDN within 50 miles of ATL between 20050819 18:00Z and 20050819 22:00Z” “Select all Hail > 1” within Fulton County”

  14. Access Web Pages

  15. Access Data Download • Shapefile, NetCDF, Text File

  16. Access Web Map Server / Web Feature Server (WMS/WFS) • Direct access from GIS Clients

  17. Access SOAP Web Services • Programmatic access to data • Allows integration into custom applications • System and language independent

  18. Analysis • Comparison between datasets “Select all TVS between 20050810 0:00Z and 20050811 0:00Z where there are no NLDN within 10 miles”

  19. Analysis • Event Study

  20. Analysis • Disaster Mitigation • Example: Compare 1 Hour of NLDN to Population Grid Data: NLDN 08/02/2005 20:00 – 21:00 UTC Gridded Population of the World - SEDAC (Socioeconomic Data and Applications Center at Columbia University) http://sedac.ciesin.columbia.edu/gpw

  21. Analysis • Example: Compare 1 Hour of NLDN to Population Grid Process: 1. Download 2000 Population Grid at ~4 km resolution. 2. Convert cell centroids to points 3. Subset data for Florida 4. Spatial Join to closest NLDN data 5. Examine matching population grid cells

  22. Example Analysis • Process: Download 2000 Population Grid (~12 km resolution).

  23. Example Analysis • Process: Convert cell centroids to points, subset for Florida.

  24. Example Analysis • Process: Spatially join to NLDN data based on distance.

  25. Example Analysis Total Population Affected = 696,179 --- 5 Strikes or More = 166,346

  26. Conclusion The Severe Weather Data Inventory: • Modular GIS spatial database approach • Datasets remain independent • Multiple user access methods • Improve disaster response, recovery and mitigation. • Many possibilities of application. • Free!

  27. Future Plans 2006 Finish decoder software. Start populating database with current data. (NEXRAD, Storm Data and NLDN) Web page access / Data Export Reprocess historical data 2007 Advanced user access (WMS/WFS/SOAP) Steve.Ansari@noaa.gov (828) 271-4611 151 Patton Ave. Asheville, NC 28801 Contact:

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