Roofing & storm datasets
Free, citable, downloadable datasets for roofing and storm research. Our storm history datasets are derived from the NOAA Storm Events Database and the NWS Storm Prediction Center (SPC). Our roof statistics datasets are privacy-safe aggregates computed from measured roofs — individual properties are never shown. Every dataset is available as JSON and CSV.
Storm data attribution: NOAA Storm Events Database / NWS Storm Prediction Center (SPC), public domain.
US storm activity by ZIP code
Every US ZIP with recent hail, wind, or tornado activity — scored for canvass priority and enriched with Census home-value and FEMA risk data. Bulk CSV/JSON, free with attribution.
Open the ZIP dataset →Research datasets
County-level data behind the studies at /research, derived from FEMA National Risk Index, Census ACS and NOAA Storm Events. CC BY 4.0.
US county housing age and hail risk, 2026
County-level median year of housing construction paired with FEMA National Risk Index hail and wind risk scores, for every US county with both measures. Derived from FEMA NRI and Census American Community Survey data joined at census-tract level and aggregated to counties.
US county hail risk, household income and home ownership, 2026
County-level FEMA National Risk Index hail risk scores paired with Census American Community Survey median household income, median home value and owner-occupancy rate, for every US county with both measures.
FEMA modelled hail risk versus observed NOAA hail events by US county, 2021-2026
County-level comparison of FEMA National Risk Index hail risk scores against counts of hail events recorded in the NOAA Storm Events Database between January 2021 and August 2026, including severe hail events of two inches or more and events normalised per 100,000 residents.
Storm history datasets
Hail, wind, and tornado event history by city. Browse by state below.
Alabama
Arizona
Arkansas
Georgia
Indiana
Kansas
Minnesota
Missouri
Nebraska
Nevada
North Carolina
Oklahoma
Tennessee
Roof statistics datasets
Aggregate roof measurements — average roof area, facet count, edge lengths, and predominant pitch — by city.
Roof-measurement datasets publish automatically as coverage grows (min. 30 measured roofs per city). Check back soon, or measure a roof to help coverage along.
Want data for a specific property?
Get a free, instant roof report with satellite measurements — or talk to us about the data API for contractors and lead platforms.