Free Interactive U.S. Hail Map & History
The most recent reported hail day in the U.S. was 2026-10-27, 2 days ago. NOAA's Storm Prediction Center has logged 3,666 separate hail days nationwide since 2010, across 138,259 reports of hail 1 inch or larger. 2,020 of those days brought hail 2 inches or larger, the largest being 7 inches in Clark County, ID on 2021-06-04.
Pick a storm date, see the NOAA radar swath and hail reports, and click anywhere to check the hail history at that exact spot. No signup.
Hail size, inches
- 0.25 in, pea
- 0.75 in, penny
- 1 in, quarter
- 1.25 in, half dollar
- 1.5 in, ping pong ball
- 1.75 in, golf ball
- 2 in, hen egg
- 2.5 in, tennis ball
- 3 in and up, teacup
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports. Radar-indicated, not a guarantee of damage.
An approved SwathIQ account is free and unlocks the full app: door-knock address lists for every hailed address inside your markets, CSV exports, and text alerts when hail hits your territory. Access is hand-reviewed -- you'll get your invite within 24-48h.
Get free access Check an addressHow to use the hail map
Choose a storm date from the menu -- it lists recent U.S. hail days, biggest first. The colored swath is NOAA's MRMS radar estimate of the largest hail in each ~1 km cell; the dots are individual SPC storm reports. Click any spot to see how many times hail has been reported there and the largest size. For a specific home, use the hail history by address lookup.
What the hail colors mean
| Color | Hail size | Roof impact |
|---|---|---|
| Faint violet haze | ~0.75″-1″ | Granule loss / bruising possible. |
| Deep violet | ~1″-1.5″ | Functional damage likely. |
| Bright violet | ~1.5″-2″ | Widespread damage; strong claim territory. |
| Pale lilac to near-white | 2″+ | Severe -- full replacements common. |
Why a free hail map?
Most hail maps make you sign up or pay before you can even see where it hailed. SwathIQ shows the map free because the value for a roofing or restoration team is in the action -- the door-knock list, the route, the branded report -- which an approved (free) account unlocks for your markets. See how SwathIQ compares to HailTrace and other tools.
U.S. hail history
The busiest month nationwide is July, with 520 of the 3,666 hail days on record. March through September holds 3,098 of them, 85% of the record -- hail season somewhere in the U.S. runs 7 months, not three.
207 separate hail days have been reported so far this year.
States with the most hail days on record
| State | Hail days | Largest stone | Reports |
|---|---|---|---|
| Texas | 1,367 | 6.25 inches | 18,163 |
| Kansas | 1,069 | 6 inches | 11,903 |
| Nebraska | 1,048 | 5 inches | 10,033 |
| South Dakota | 853 | 6 inches | 6,535 |
| Oklahoma | 817 | 5.25 inches | 7,423 |
| Colorado | 774 | 5 inches | 6,049 |
| Missouri | 731 | 5 inches | 7,767 |
| Minnesota | 609 | 6 inches | 5,292 |
| Iowa | 589 | 4.5 inches | 5,095 |
| Illinois | 557 | 6.1 inches | 4,852 |
| North Dakota | 553 | 5 inches | 3,609 |
| Arkansas | 522 | 5 inches | 3,050 |
32 states have a hail-history hub of their own, each with a county-by-county breakdown.
Hail maps by state
Jump to a curated state hub with local hail history and county breakdowns: Texas · Kansas · Nebraska · South Dakota · Oklahoma · Colorado · Missouri · Minnesota · Iowa · Illinois · North Dakota · Arkansas · New Mexico · Wyoming · North Carolina · Georgia · Montana · Mississippi · Virginia · Wisconsin · Tennessee · Florida · Alabama · Ohio · South Carolina · Indiana · Louisiana · Kentucky · Pennsylvania · Michigan · New York · West Virginia.
Embed this hail map on your site
Add the live SwathIQ hail map to your own roofing site with one line -- free. It updates itself as new storms come in.
Free, no key and no account: one iframe, scopeable to a single state with ?state=TX. Get alerts when hail hits with free hail alerts.
FAQ
Is the hail map free?
What do the colors mean?
How far back does it go?
Data & method: NOAA MRMS MESH radar + NOAA/NWS SPC storm reports. Radar-indicated and observation-based -- informational only.