How big was the hail on July 20, 2024?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Loveland, CO. 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 · July 20, 2024

Hail map — July 20, 2024

Name: US hail map — July 20, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 7 cities across 3 states on July 20, 2024. The largest stones — 1.50″, half dollar size — fell over Loveland, CO.

Hail swath map for Loveland, CO on July 20, 2024 showing 1.50 inch hail. — Largest rendered swath of the day: Loveland, CO — 1.50″ hail. Each city below has its own map for this storm.

States hit: 3
Cities hit: 7
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 July 20, 2024

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

Colorado4 cities · 1.50″Florida2 cities · 1.00″Texas1 city · 1.00″

Hardest hit on July 20, 2024

Loveland, CO1.50″ · half dollar Longmont, CO1.00″ · quarter Winter Haven, FL1.00″ · quarter Windsor, CO1.00″ · quarter Lake Jackson, TX1.00″ · quarter Eloise, FL1.00″ · quarter Erie, CO1.00″ · quarter

What people on the ground measured in the US on July 20, 2024

15 reports filed with the National Weather Service — 8 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.

3.00″ baseball size Trained Spotter
5 E Bayard, NE2:36 PM CDTMorrill County
2.00″ hen egg size Trained Spotter
5 E Bayard, NE2:36 PM CDTMorrill County
1.75″ golf ball size Fire Dept/Rescue
3 N Bayard, NE2:26 PM CDTMorrill County
Reported Quarter to Golf Ball Size Hail.
1.50″ half dollar size Public
1 NW Campion, CO7:44 PM MDTLarimer County
1.25″ half dollar size Cocorahs
4 WSW Berthoud, CO7:45 PM MDTLarimer County
Up to half dollar size hail fell for a duration of 6 minutes.
1.00″ quarter size Emergency Mngr
7 SSE Bushnell, NE4:40 PM CDTKimball County
Emergency manager measured one inch hailstones with calipers.
1.00″ quarter size Trained Spotter
12 NW Hillsdale, WY5:25 PM MDTLaramie County
Trained spotter reports quarter-size hail.
1.00″ quarter size Trained Spotter
Hillsdale, WY5:34 PM MDTLaramie County
Spotter reports quarter-size hail.
1.00″ quarter size Cocorahs
1 ENE Fort Collins, CO6:53 PM MDTLarimer County
Between half inch to 1 inch diameter hail fell for 5 minutes.
1.00″ quarter size Public
3 NW Campion, CO7:34 PM MDTLarimer County
1.00″ quarter size Trained Spotter
3 SW Loveland, CO7:40 PM MDTLarimer County
1.00″ quarter size Cocorahs
2 SSW Berthoud, CO7:52 PM MDTLarimer County
Delayed report. Time estimated by radar.
1.00″ quarter size Trained Spotter
3 SSE Gilcrest, CO7:53 PM MDTWeld County
1.00″ quarter size Trained Spotter
2 SSW Berthoud, CO8:00 PM MDTLarimer County
1.00″ quarter size Cocorahs
3 WSW Frederick, CO8:15 PM MDTWeld County
Delayed report. Time estimated by radar.

Showing the 15 largest of 37 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 July 20, 2024

NOAA radar put hail of an inch or more over 7 cities across 3 states on July 20, 2024. The largest stones — 1.50 inches, half dollar size — were over Loveland, CO. 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