NoVA Severe Weather Warning Climatology Atlas (2002-2026): NWS Storm-Based Warning Polygons for Northern Virginia

Every NWS storm-based Tornado, Severe Thunderstorm, and Flash Flood warning polygon that has touched Northern Virginia in the 24.5-year VTEC era (2,455 warnings, WFO LWX, 2002-2026), with a 2-km hexagonal warning-frequency surface, IsolationForest annual anomaly screening, per-jurisdiction statistics, FGDC metadata, and a full PDF report.Produced by the Keystone GIS Northern Virginia Autonomous GIS Research Program. Full methodology, interactive map, and FGDC metadata: https://keystonegis.com/datasets/nova-severe-warnings-day55.html