How big was the hail on September 19, 2023?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Ames, IA. Sizes vary street to street inside a single swath, so a city's figure is the largest radar estimated anywhere within about 5 miles of it.

Where does this hail data come from?

NOAA MRMS radar, specifically the Maximum Estimated Size of Hail product, ingested directly from the public NOAA archive. It runs about a quarter of an inch against ground truth, which makes it good for deciding where to look and not a substitute for an inspection.

Does this mean roofs were damaged?

Radar measures stone size, not damage. Whether a particular roof was damaged depends on stone size, wind direction, roof age and material — only an inspection settles it. These figures tell you where it is worth looking.

How do I see the actual swath on a map?

A HailMate plan puts a whole state on a real interactive map, with this swath and three years of others already on it. From $79/mo, and the canvassing tools come with it.

United States · September 19, 2023

Hail map — September 19, 2023

Name: US hail map — September 19, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 2 cities across 2 states on September 19, 2023. The largest stones — 1.00″, quarter size — fell over Ames, IA.

Hail swath map for Ames, IA on September 19, 2023 showing 1.00 inch hail. — Largest rendered swath of the day: Ames, IA — 1.00″ hail. Each city below has its own map for this storm.

States hit: 2
Cities hit: 2
Largest stone: 1.00″; quarter size
Impact rating: 3/10; from stone size

Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.

Roofing contractors

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HailMate's canvassing map: hail swaths colour-banded by stone size, from yellow through red to purple, laid over a satellite view of a Texas territory, with hail swath and territory controls.

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Three years of hail swaths, filterable by stone size
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Homeowners

Did hail hit your address?

This page covers your area as a whole. Check your own address to see every storm on record for your roof — the date and the stone size for each one — and we'll email you the full report to keep.

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Free, and no account needed to look it up. If hail did hit, you can ask for a free inspection from a vetted local roofer.

States hit on September 19, 2023

Every state where NOAA radar put an inch or more of hail over a city that day, biggest stone first.

Iowa1 city · 1.00″Oklahoma1 city · 1.00″

Hardest hit on September 19, 2023

Ames, IA1.00″ · quarter Shawnee, OK1.00″ · quarter

What people on the ground measured in the US on September 19, 2023

15 reports filed with the National Weather Service — 6 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

2.75″ baseball size Broadcast Media
Quanah, TX6:21 PM CDTHardeman County
2.50″ hen egg size Public
10 E Childress, TX5:38 PM CDTChildress County
2.50″ hen egg size NWS Employee
3 WSW Johnson, OK9:45 PM CDTPottawatomie County
2.50″ hen egg size Emergency Mngr
2 WNW Aydelotte, OK9:58 PM CDTPottawatomie County
2.00″ hen egg size Trained Spotter
3 E Ensign, KS7:00 PM CDTFord County
2.00″ hen egg size Trained Spotter
1 NNW Roosevelt, OK7:08 PM CDTKiowa County
2.00″ hen egg size Fire Dept/Rescue
Newcastle, OK8:48 PM CDTMcClain County
Delayed report. Relayed image showing golf ball to hen egg size hail.
1.75″ golf ball size Fire Dept/Rescue
4 SSE Okeene, OK6:45 PM CDTBlaine County
Delayed report. Relayed image showing golf ball size hail. Radar estimated time.
1.75″ golf ball size Public
Chillicothe, TX7:02 PM CDTHardeman County
1.75″ golf ball size Fire Dept/Rescue
3 N Tom Steed Reservoir, OK7:09 PM CDTKiowa County
1.75″ golf ball size Public
8 ESE Ensign, KS7:10 PM CDTFord County
1.75″ golf ball size Storm Chaser
Thalia, TX7:15 PM CDTFoard County
Corrects previous hail report from Thalia. Storm likely passed well before report was relayed, indicating some melting was likely.
1.75″ golf ball size Law Enforcement
5 ENE Woodson, TX9:12 PM CDTThrockmorton County
Golf ball sized hail was reported by the Throckmorton County Sheriff Office.
1.75″ golf ball size Emergency Mngr
4 NW Shawnee, OK9:38 PM CDTPottawatomie County
1.75″ golf ball size Emergency Mngr
2 WNW Aydelotte, OK9:58 PM CDTPottawatomie County
Corrects previous hail report from 2 WNW Aydelotte.

Showing the 15 largest of 52 hail reports filed that day.

Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.

Other hail days

August 19, 202620 cities · 2.00″August 18, 20266 cities · 1.50″August 17, 20266 cities · 1.00″August 16, 202610 cities · 1.50″August 15, 20268 cities · 1.50″August 14, 202611 cities · 2.00″August 13, 202616 cities · 2.00″August 12, 202610 cities · 1.50″August 11, 202633 cities · 2.00″August 10, 202623 cities · 1.50″August 9, 202649 cities · 1.50″August 8, 20265 cities · 1.50″

Every state with hail on record →

FAQ

US hail on September 19, 2023

NOAA radar put hail of an inch or more over 2 cities across 2 states on September 19, 2023. The largest stones — 1.00 inches, quarter size — were over Ames, IA. Every state hit is listed on this page, and every city under it.

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