Every data point is transparent, auditable, and traceable to its government origin. No proprietary algorithms. No black boxes. Just official federal data you can verify.
Real-time and historical storm data from the nation's authoritative weather monitoring networks.
Primary federal repository for severe weather events including hail, wind, tornadoes, flash floods, and winter storms. Events compiled from NWS offices nationwide with coordinates, date/time, and magnitude.
Real-time severe weather observations from NWS offices, emergency managers, trained spotters, and law enforcement. Preliminary reports before official database entry.
Archived severe weather reports including tornadoes, large hail (1"+), and damaging winds (58+ mph). Official verification database for climatological analysis.
Complete Atlantic hurricane and tropical storm track data including position, maximum winds, pressure, and wind radii. Used for coastal and inland proximity calculations.
Comprehensive hazard data from federal emergency management and environmental agencies.
Official flood zone designations for NFIP. Includes Special Flood Hazard Areas, base flood elevations, floodway boundaries, and zone classifications (A, AE, V, VE, X).
Federal disaster and emergency declarations at the county level. Declaration type (DR, EM, FM), incident description, dates, and designated areas.
County-level risk ratings for 18 natural hazards. Expected annual loss, social vulnerability, and community resilience scores.
Wildfire hazard potential classification from Very Low to Very High. WUI zone identification based on landscape characteristics and fuel conditions.
Detailed soil characteristics including shrink-swell potential, corrosion risk, drainage class, hydrologic group, and water table depth.
High-resolution elevation data for flood risk context, drainage assessment, and topographic exposure analysis.
Weekly drought classifications from D0 (Abnormally Dry) to D4 (Exceptional Drought). Current status and historical patterns.
For county-level climate reports, we integrate the most comprehensive climate projection dataset available for the United States.
Statistically downscaled climate projections from CMIP6. LOCA2 methodology provides high-resolution projections for local planning. Includes temperature extremes, precipitation patterns, and water balance variables through 2100.
Federal databases capture reported events and conditions, not necessarily all events that occurred. Event locations may be approximate. Historical data completeness improves over time. Atlas United presents data as-is from official sources — we do not modify or enhance event records. Reports document exposure history and risk factors; they do not confirm damage or predict future events.
