Attention: NCEI HDSS Access System (HAS) is currently unavailable. Access to the affected systems should be restored by Monday, April 20. We apologize for the inconvenience.
Severe Weather Data
Storm Events Database
The NCDC Storm Events Database contains various types of storm reports searchable by state, county, date, and event type from 1950 to the present. Data are also available in comma-separated value (CSV) files, as entered by NOAA's National Weather Service (NWS).
Severe Weather Data Inventory (SWDI)
SWDI includes data from a variety of sources in NCDC's archive. SWDI provides the ability to search through all of these data to find records covering a particular time period and geographic region, and to download the results of your search in a variety of formats. The formats currently supported are Shapefile (for GIS), KMZ (for Google Earth), CSV, and XML.
International Best Track Archive for Climate Stewardship (IBTrACS)
IBTrACS provides tropical cyclone best track data in a centralized location to aid understanding of the distribution, frequency, and intensity of tropical cyclones worldwide.
Lightning Products and Services
Access to verified lightning damage and casualty reports as well as lightning strike data recorded from lightning detection sensors. Derived products include summaries of lightning strikes by county and state as well as gridded lightning strike frequency products in the NetCDF format.