Last updated 4 August 2026. Plain language on purpose. If something here is unclear, ask before you rely on it.
The hail lookups on this site are built on NOAA MRMS and NWS data, which is public domain. They are free, they need no account, and we make no promise about uptime. If an upstream federal service is down, the tools say so rather than returning an empty answer that reads like "no hail".
MESH is a radar estimate of the largest hail a storm was capable of producing over a grid cell. It is not an observation, not a measurement, and not evidence that any specific roof was damaged. Nothing on this site is an insurance report, an engineering assessment, or a claim document. A roof has to be inspected by a person. You are responsible for what you tell a homeowner about their property.
We do not promise a number of leads. Hail is weather. Some months a city produces nothing.
We do not contact homeowners on your behalf, sign anything for you, or take a share of a job. We are not a party to whatever you and the homeowner agree.
The JSON API is keyless and free. Please keep request volume reasonable and identify your tool in a user-agent header. We may rate limit or block traffic that threatens the service for everyone else. The underlying NOAA data is public domain and yours to use; this site's pages and code are not.
The tools and the data are provided as they are. To the extent the law allows, we are not liable for losses arising from use of this site, and any liability is limited to the amount you have paid us in the previous three months. Nothing here limits liability that cannot legally be limited.
If these terms change in a way that affects money or exclusivity, active customers get an email before it takes effect. Governed by the laws of the Commonwealth of Virginia.
Half Mile Hail · Fredericksburg, Virginia ·
chris@halfmilehail.com
Independent. Not affiliated with, endorsed by, or sponsored by NOAA, the National Weather Service, or
any government agency. Built on public-domain federal data.
Homeowner looking up your own address? That side is free at
whathitmyhouse.com.