How big was the hail on March 12, 2024?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Lee's Summit, 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 · March 12, 2024

Hail map — March 12, 2024

Name: US hail map — March 12, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 3 cities across 2 states on March 12, 2024. The largest stones — 1.00″, quarter size — fell over Lee's Summit, MO.

Hail swath map for Lee's Summit, MO on March 12, 2024 showing 1.00 inch hail. — Largest rendered swath of the day: Lee's Summit, MO — 1.00″ hail. Each city below has its own map for this storm.

States hit: 2
Cities hit: 3
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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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 March 12, 2024

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

Missouri2 cities · 1.00″Kansas1 city · 1.00″

Hardest hit on March 12, 2024

Lee's Summit, MO1.00″ · quarter Blue Springs, MO1.00″ · quarter Pittsburg, KS1.00″ · quarter

What people on the ground measured in the US on March 12, 2024

15 reports filed with the National Weather Service — 3 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.

2.00″ hen egg size Storm Chaser
2 SW Napoleon, MO8:49 PM CDTLafayette County
relayed via X-Twitter, radar estimated time.
2.00″ hen egg size Public
Wellington, MO9:24 PM CDTLafayette County
From X-Twitter.
1.75″ golf ball size Broadcast Media
2 E Greenwood, MO5:57 PM CDTJackson County
Photos showing golf ball sized hail in Greenwood area.
1.75″ golf ball size NWS Employee
4 N Oak Grove, MO8:18 PM CDTJackson County
1.75″ golf ball size Public
2 N Grain Valley, MO8:39 PM CDTJackson County
From several reports on X-Twitter north of Grain Valley between Pink Hill Road and Duncan Road.
1.75″ golf ball size Public
Carterville, MO9:40 PM CDTJasper County
1.50″ half dollar size Public
Greenwood, MO5:55 PM CDTJackson County
Delayed report. Several photos of ping pong ball sized hail in Greenwood, with damage to vehicles. Time estimated from radar.
1.50″ half dollar size NWS Employee
3 E Lee's Summit, MO6:15 PM CDTJackson County
Ping pong ball hail near US Highway 50 and Blackwell Road in eastern Lees Summit.
1.50″ half dollar size Public
1 NE Lone Jack, MO6:41 PM CDTJackson County
Social media photo of what appears to be ping pong ball sized hail in Lone Jack.
1.50″ half dollar size Public
1 E Lake Lafayette, MO7:15 PM CDTLafayette County
From picture on X-Twitter.
1.50″ half dollar size Public
4 N Grain Valley, MO8:35 PM CDTJackson County
From photo on Facebook.
1.50″ half dollar size Public
1 ENE Grain Valley, MO8:37 PM CDTJackson County
From Facebook.
1.50″ half dollar size Public
1 N Weir, KS8:50 PM CDTCherokee County
Via social media picture from media FB.
1.50″ half dollar size Public
Webb City, MO9:30 PM CDTJasper County
1.25″ half dollar size NWS Employee
2 E Bates City, MO6:57 PM CDTLafayette County

Showing the 15 largest of 53 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 March 12, 2024

NOAA radar put hail of an inch or more over 3 cities across 2 states on March 12, 2024. The largest stones — 1.00 inches, quarter size — were over Lee's Summit, MO. Every state hit is listed on this page, and every city under it.

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