Attention: NCEI will undergo maintenance on Wednesday, June 3 (6:00 AM - 11:30 AM EDT). Access to many web systems will be unavailable during this time.
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Next Generation Weather Radar (NEXRAD)
Information on the NEXRAD network, history, documentation, base data, and derived products.
Terminal Doppler Weather Radar (TDWR)
Information on the TDWR network, history, documentation, and derived products.
Radar Display Tools
Radar data is in a custom binary format. The visualization and decoding of the data requires specialized software.
Interactive Radar Map Tool
Supplemental data in support of the radar archive, including historical five-minute reflectivity mosaics for the continental United States, radar coverage maps, and map-based site selection tools.
Severe Weather Data
Several severe weather datasets exist including the Severe Weather Data Inventory (SWDI), Lightning Products and Services, Storm Data, and International Best Track Archive for Climate Stewardship. SWDI contains a database of the NEXRAD/TDWR tracked storm attributes, including storm structure, hail, mesocyclone, and tornado vortex signature.