Free tool · NOAA data · updated daily
US hail map
Every official NOAA hail report on one map — size, county, and date. Toggle the last 24 hours, 7 days, or 30 days. Built for roofing contractors deciding where to canvass next.
Largest hail in the last 7 days
| Hail size | County | State | Date |
|---|---|---|---|
| 3.5" | Coffey | Kansas | Jun 1 |
| 3.5" | Lincoln | Nebraska | May 31 |
| 3.5" | Otero | New Mexico | Jun 2 |
| 3.0" | Fallon | Montana | Jun 3 |
| 2.75" | Kimball | Nebraska | May 30 |
| 2.75" | Beadle | South Dakota | Jun 4 |
| 2.5" | Marshall | Alabama | Jun 1 |
| 2.5" | Tripp | South Dakota | Jun 4 |
| 2.0" | Adams | Colorado | Jun 1 |
| 2.0" | Washington | Colorado | Jun 1 |
| 2.0" | Clinton | Missouri | Jun 1 |
| 2.0" | Hayes | Nebraska | May 30 |
Hail hit your service area? See which roofs took damage.
The map tells you where hail fell. Roofbird tells you which specific roofs to knock: it scores every home in a hit ZIP code from satellite imagery and returns a ranked canvassing list with addresses and damage signs. 25 free leads, no card.
Hail activity by state
Reports in the last 12 months. Click a state for its hail history, biggest recent events, and counties hit.
How roofers use this map
Check the map after storm days. One-inch hail is the damage threshold for asphalt shingles; 1.75" and up damages newer roofs too.
Zoom into the hit counties. Residential density matters more than the single biggest stone — a 1.25" swath over a suburb beats 3" over farmland.
Score the hit area from satellite imagery so your crew knocks pre-damaged and aged roofs first. That is what Roofbird does — a ranked list, not a blind walk.
About the data
Reports come from NOAA's Storm Prediction Center daily storm report files — the same ground-truth dataset insurers and meteorologists use. Each point is an observed hail report with size (in inches), county, and coordinates. SPC finalizes a storm day the following morning; we ingest it daily and keep a rolling 12-month history. NOAA data is public domain. A report is a point observation, not a damage swath: real hail footprints extend miles around each report, so treat points as the center of an affected area, not its boundary.
Hail map FAQ
Where does the hail map data come from?
Every point on the map is an official hail report from NOAA's Storm Prediction Center (SPC). SPC publishes ground-truth storm reports daily — hail size, county, state, and coordinates. We ingest them every morning and keep a rolling 12-month history.
How often is the hail map updated?
Daily. NOAA SPC finalizes a storm day's reports the following morning, and the map updates within hours of publication. For storms happening right now, expect reports to appear on the map the next day.
What hail size damages a roof?
One-inch hail (quarter size) is the standard threshold for damage to asphalt shingles, and it is also NOAA's threshold for a severe thunderstorm. Hail at 1.75 inches (golf ball) and above commonly damages even newer architectural shingles. Older or already-degraded roofs can take damage from smaller hail.
How do roofing contractors use a hail map?
Contractors use hail maps to decide where to canvass after a storm: find the counties hit with 1-inch-plus hail, then identify which specific roofs in that area are most likely damaged. Tools like Roofbird score every roof in a hit ZIP code from satellite imagery, so crews knock the worst-condition roofs first instead of going door to door blind.
Is this hail map free?
Yes. The map, the state pages, and the underlying NOAA reports are free with no signup. Roofbird makes money from its roof-scoring product, not from this map.