Why StormAuditor
One platform for hail maps, wind swaths, address-level storm reports, and date-of-loss research — built entirely on public NOAA and NWS records.
One platform for the whole research workflow
Most tools cover a slice: a hail map here, a station lookup there. StormAuditor connects the workflow professionals actually run — statewide hail and wind swath maps to find where a storm concentrated, the Zone Canvas Tool to list every storm day inside a neighborhood you outline, address-level reports with estimates and evidence, and date-of-loss research tools to organize candidate dates — all on public NOAA and NWS records covering all 50 states.
What makes it different
- Published methodology: the wind and hail engines are documented and the wind engine's verification statistics are public.
- Honest language: every value is an estimate with its evidence and distance shown — never dressed up as a measurement it isn't.
- A real free tier: the Free Report Snapshot answers the first question at no cost, state storm data is free to browse and download, and Live Radar & Storm Replay plus the 7-Day NWS Forecast are free with no account at all.
- Right-sized pricing: a $2.99 one-time report exists precisely so one-off questions don't require a subscription — see all plans.
Compare the landscape yourself on the tools comparison page.
Common questions
What is a hail swath map?
A hail swath map shows the radar-derived footprint of a hail storm — the area where hail of each size band likely fell. StormAuditor's Hail Explorer draws statewide MRMS MESH hail swaths in nine size bands from 0.50" to 3.00"+, for every day with qualifying hail in the covered state, going back to October 2021.
What is a wind swath map?
A wind swath map shows where the strongest wind gusts were analyzed on a given day. StormAuditor's Wind Explorer draws statewide wind swaths from NOAA URMA 2.5 km analysis (daily maximum gust), banded at 40, 58, 74, 96, and 111+ mph, with daily history since October 2021 in every state.
How do I find the date of loss for a storm damage claim?
Start with the Date of Loss research browser or the DOL Database: both rank candidate storm dates for a state or address from deduplicated NWS warnings, observed storm reports, and station measurements. Then run an Address Lookup or Weather Report on the candidate dates to see the estimated at-address hail size and peak gust.
Can I get a hail report for a specific address?
Yes. The free Address Lookup shows the at-address NOAA dossier and a Free Report Snapshot. The full Weather Report — every qualifying date with estimated max hail size and peak wind gust, as a web report and branded PDF — is available on Pro plans or as a one-time $2.99 Single Weather Report with no account.
Does StormAuditor cover my state?
Address research, warnings, storm reports, station observations, radar-derived hail and wind swath maps, and official records cover all 50 states.
Is StormAuditor's data from official sources?
All inputs are public NOAA/NWS records: MRMS MESH radar hail, URMA and HRRR analyses, ASOS/AWOS station observations, NWS warnings and Local Storm Reports, SPC reports, NCEI Storm Events, and FEMA declarations. The methodology pages document exactly how they combine, and every value is an estimate, not an on-site measurement.