How big was the hail on October 11, 2023?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Blue Springs, MO. 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 · October 11, 2023

Hail map — October 11, 2023

Name: US hail map — October 11, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 city across 1 state on October 11, 2023. The largest stones — 1.00″, quarter size — fell over Blue Springs, MO.

Hail swath map for Blue Springs, MO on October 11, 2023 showing 1.00 inch hail. — Largest rendered swath of the day: Blue Springs, MO — 1.00″ hail. Each city below has its own map for this storm.

States hit: 1
Cities hit: 1
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.

Your whole state at street level, with this storm already on it
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 October 11, 2023

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

Missouri1 city · 1.00″

Hardest hit on October 11, 2023

Blue Springs, MO1.00″ · quarter

What people on the ground measured in the US on October 11, 2023

15 reports filed with the National Weather Service — 12 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.

1.75″ golf ball size Trained Spotter
2 W Oak Grove, MO1:12 AM CDTJackson County
Social media photos showing golf ball sized hail between Grain Valley and Oak Grove.
1.50″ half dollar size Trained Spotter
1 WNW Amish, IA4:05 PM CDTJohnson County
Ping pong ball size hail fell for 10 minutes.
1.50″ half dollar size Trained Spotter
2 SSW Williamstown, IA4:12 PM CDTJohnson County
1.50″ half dollar size Trained Spotter
2 NE Norway, IA5:42 PM CDTBenton County
Updates previous hail report from 2 NE Norway.
1.25″ half dollar size NWS Employee
Park View, IA6:18 PM CDTScott County
Updated to include half dollar size hail.
1.00″ quarter size NWS Employee
Grain Valley, MO1:10 AM CDTJackson County
NWS employee reported quarter size hail.
1.00″ quarter size Public
1 WSW Oak Grove, MO1:14 AM CDTJackson County
Report from mPING: Quarter (1.00 in.) Time estimated via radar.
1.00″ quarter size Trained Spotter
Norway, IA5:16 PM CDTBenton County
1.00″ quarter size Trained Spotter
2 NE Norway, IA5:42 PM CDTBenton County
0.88″ penny size Broadcast Media
Donahue, IA6:13 PM CDTScott County
Nickel to near quarter size hail.
0.88″ penny size NWS Employee
Park View, IA6:17 PM CDTScott County
Nickel size hail.
0.88″ penny size Amateur Radio
1 NW Bennett, IA8:18 PM CDTCedar County
Nickel size hail at Bennett Park.
0.75″ penny size Trained Spotter
Belle Plaine, IA4:36 PM CDTBenton County
Penny size hail.
0.75″ penny size Trained Spotter
Cedar Rapids Municipali, IA5:12 PM CDTLinn County
0.70″ penny size Trained Spotter
Ely, IA5:22 PM CDTLinn County
lasted for 3 min.

Showing the 15 largest of 19 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 October 11, 2023

NOAA radar put hail of an inch or more over 1 city across 1 state on October 11, 2023. The largest stones — 1.00 inches, quarter size — were over Blue Springs, MO. Every state hit is listed on this page, and every city under it.

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