How big was the hail on September 21, 2023?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Denton, TX. 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 21, 2023

Hail map — September 21, 2023

Name: US hail map — September 21, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 9 cities across 3 states on September 21, 2023. The largest stones — 1.50″, half dollar size — fell over Denton, TX.

Hail swath map for Denton, TX on September 21, 2023 showing 1.50 inch hail. — Largest rendered swath of the day: Denton, TX — 1.50″ hail. Each city below has its own map for this storm.

States hit: 3
Cities hit: 9
Largest stone: 1.50″; half dollar size
Impact rating: 5/10; 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

Work your area on the live hail map

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.

Your whole state at street level, with this storm already on it
Three years of hail swaths, filterable by stone size
GPS door-knocking, pins, jobs and estimates — the full loop, not a preview
Month-to-month, cancel anytime

Get started

One state, one user, everything included. $79/mo, cancel anytime.

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.

Check my address

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 21, 2023

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

Texas3 cities · 1.50″Missouri3 cities · 1.00″Florida3 cities · 1.00″

Hardest hit on September 21, 2023

Denton, TX1.50″ · half dollar Sherman, TX1.50″ · half dollar Denison, TX1.50″ · half dollar Saint Charles, MO1.00″ · quarter Altamonte Springs, FL1.00″ · quarter Maryland Heights, MO1.00″ · quarter Casselberry, FL1.00″ · quarter Hazelwood, MO1.00″ · quarter Wekiwa Springs, FL1.00″ · quarter

What people on the ground measured in the US on September 21, 2023

15 reports filed with the National Weather Service — 4 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.

4.00″ softball size Public
4 N Johnson Lake, NE4:50 PM CDTDawson County
Public report relayed via a storm chaser of possible softball size hail south of the Darr Interchange on Interstate 80. Photos accompanying the report showed damage to the windows of a vehicle. Time is estimated based on radar.
2.75″ baseball size Public
6 SE Cozad, NE4:54 PM CDTDawson County
Tennis ball to baseball size hail reported on Darr Road near Lauby Cattle. Time estimated from radar.
2.75″ baseball size Law Enforcement
Red Cloud, NE5:46 PM CDTWebster County
Various reports with largest report from Law enforcement and FB with baseball sized hail. Large hail lasted about 25min. Lots of car damage. Trees leaves also took a beating from hail.
2.75″ baseball size Public
4 WNW Lyle, KS7:30 PM CDTDecatur County
Delayed report sent via social media of baseball sized hail approximately 7 miles SE of Danbury, NE and 1 mile into KS from the state border.
2.50″ hen egg size Trained Spotter
8 WNW Culbertson, NE3:50 PM CDTHitchcock County
Spotter driving a semi on Highway 6 ran into storm and had hail ranging from ping pong to tennis ball. Time approx by radar.
2.50″ hen egg size Public
Krum, TX6:21 PM CDTDenton County
Multiple social media pictures of near tennis ball size hail in Krum.
2.00″ hen egg size Public
5 NE Stockville, NE4:27 PM CDTFrontier County
Delayed report from social media. Time estimated by radar.
2.00″ hen egg size Public
Cowles, NE4:41 PM CDTWebster County
Social media report of 2 inch hail in Cowles.
2.00″ hen egg size Trained Spotter
6 ESE Cozad, NE4:50 PM CDTDawson County
Hail to the size of green walnut. Time estimated from radar.
2.00″ hen egg size Public
2 W Mccook, NE5:55 PM CDTRed Willow County
Delayed report received of hail up to 2 inches in diameter at location. Time is radar estimated.
1.75″ golf ball size Public
5 N Johnson Lake, NE4:23 PM CDTDawson County
Report with photo from Facebook. Location was between Johnson Lake and Interstate 80. Time estimated from radar.
1.75″ golf ball size Trained Spotter
Culbertson, NE4:40 PM CDTHitchcock County
1.75″ golf ball size Public
4 NE Wilcox, NE4:48 PM CDTKearney County
Social media report of golf ball size hail 6 miles south of Axtell.
1.75″ golf ball size Law Enforcement
Red Cloud, NE6:05 PM CDTWebster County
Law enforcement reports hail increasing in size, up to golf ball size.
1.75″ golf ball size Emergency Mngr
Red Cloud, NE6:06 PM CDTWebster County

Showing the 15 largest of 47 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 21, 2023

NOAA radar put hail of an inch or more over 9 cities across 3 states on September 21, 2023. The largest stones — 1.50 inches, half dollar size — were over Denton, TX. Every state hit is listed on this page, and every city under it.

Knock the streets this storm hit

Your whole state at street level, with this swath already on the map — $79/mo, cancel anytime.

One state, everything included · from $79/mo · month-to-month, cancel anytime