Lookback
Severe weather history
Hail archive from May 2021 and severe storm reports for the contiguous US.
Overview
Lookback answers "what happened here?". The hail archive can be queried by single point, batch of points, arbitrary polygon or map tile, and is complemented by official Storm Prediction Center severe weather reports.
Responses are GeoJSON, so results drop straight into a map without a translation layer.
Typical uses
Insurance claim validation and fraud detection, portfolio risk assessment, catastrophe modelling, and territory targeting for restoration contractors.
Operations
Query Hail History at a Point (GeoJSON)
GET /lookback/hail/ — Query historical hail activity at a single lat/lon point, returned as a GeoJSON FeatureCollection.
Active Hail Across CONUS
GET /lookback/hail/active/ — Rolling snapshot of recent hail across the contiguous United States.
List Hail Events (Paginated)
POST /lookback/hail/events/ — Return a paginated list of storm event days, newest first.
Get Hail Event by Date
POST /lookback/hail/events/{event_date}/ — Return event stats plus all individual SPC weather reports for a single storm day.
Query Hail History at Multiple Points (GeoJSON)
POST /lookback/hail/multi/ — POST a batch of lat/lon points and receive hail history for each, returned as a GeoJSON FeatureCollection.
Hail History Within a Polygon (Event Timeline + Per-Cell Map)
POST /lookback/hail/polygon/ — Query hail history for all radar grid cells inside a GeoJSON Polygon.
Hail Tile (GeoJSON) for Map Rendering
GET /lookback/hail/tile/ — Return all hail grid cells within a Web Mercator tile that recorded hail in the requested time window.
SPC Severe Weather Reports
GET /lookback/spc-reports/ — Retrieve NOAA Storm Prediction Center (SPC) severe weather reports (hail, wind, tornado) as a GeoJSON FeatureCollection.