How big was the hail on August 13, 2026?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Denver, 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 radar, ingested directly from the public NOAA archive. The estimated stone size 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 · August 13, 2026

Hail map — August 13, 2026

Name: US hail map — August 13, 2026
Creator: HailMate

NOAA radar detected hail of an inch or more over 51 cities across 14 states on August 13, 2026. The largest stones — 2.00″, hen egg size — fell over Denver, CO.

Hail swath map for Denver, CO on August 13, 2026 showing 2.00 inch hail. — Largest rendered swath of the day: Denver, CO — 2.00″ hail. Each city below has its own map for this storm.

Roofing contractors

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The August 13, 2026 swath — and every other storm since 2023 across your state
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States hit: 14
Cities hit: 51
Largest stone: 2.00″; hen egg size
Impact rating: 7/10; from stone size

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

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'll have the date and the stone size in writing — which is the first thing an adjuster asks for.

States hit on August 13, 2026

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

Colorado15 cities · 2.00″Nevada5 cities · 1.50″Indiana3 cities · 1.50″Alabama2 cities · 1.50″Nebraska1 city · 1.50″Arizona3 cities · 1.00″Texas1 city · 1.00″Illinois5 cities · 1.00″South Carolina3 cities · 1.00″Maine4 cities · 1.00″Florida4 cities · 1.00″Kansas2 cities · 1.00″Georgia2 cities · 1.00″Michigan1 city · 1.00″

Hardest hit on August 13, 2026

Showing the 24 largest of 51 cities hit. The rest are under their state above.

What people on the ground measured in the US on August 13, 2026

15 reports filed with the National Weather Service — 4 from trained observers 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 Public
2 W Arapahoe Park, CO4:25 PM MDTArapahoe County
Report from mPING: Golf Ball (1.75 in.).
1.75″ golf ball size Public
4 S Bushnell, NE9:49 PM CDTKimball County
1.75″ golf ball size Emergency Mngr
4 ENE Alexandria, IN12:26 AM EDTMadison County
1.50″ half dollar size Public
2 E Fair Haven, VT2:45 PM EDTRutland County
Picture on social media.
1.50″ half dollar size Public
2 E Fair Haven, VT2:50 PM EDTRutland County
Picture on social media.
1.50″ half dollar size Trained Spotter
2 NNW Foxfield, CO4:15 PM MDTArapahoe County
1.50″ half dollar size Cocorahs
2 NNW Foxfield, CO4:15 PM MDTArapahoe County
1.50″ half dollar size Public
Summitville, IN12:19 AM EDTMadison County
Report from mPING. Time estimated from radar.
1.25″ half dollar size Public
Centennial, CO4:10 PM MDTArapahoe County
Report from mPING: Half Dollar (1.25 in.).
1.00″ quarter size Storm Chaser
2 S Portland Jetport, ME3:23 PM EDTCumberland County
1.00″ quarter size Law Enforcement
Lee Vining, CA12:55 PM PDTMono County
1 inch hail in Lee Vining.
1.00″ quarter size Broadcast Media
1 WNW Foxfield, CO4:07 PM MDTArapahoe County
2 to 3 feet deep hail drifts. Hail accumulation up to 3 inches in yards with most leaves stripped from trees. Quarter size hail found approximately an hour after hail fell. Time estimated by radar.
1.00″ quarter size Trained Spotter
2 W Arapahoe Park, CO4:19 PM MDTArapahoe County
Also reported dents on metal roof vents, and a significant amount of leaves stripped from trees.
1.00″ quarter size Public
1 W Arapahoe Park, CO4:30 PM MDTArapahoe County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Trained Spotter
1 NE Rigdon, IN11:56 PM EDTGrant County

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

September 30, 20261 city · 2.00″September 28, 20261 city · 1.00″September 27, 20264 cities · 1.00″September 26, 20261 city · 1.00″September 25, 20263 cities · 1.00″September 23, 20262 cities · 1.00″September 22, 202617 cities · 1.00″September 21, 202665 cities · 2.00″September 20, 20268 cities · 1.50″September 19, 202637 cities · 1.50″September 18, 202623 cities · 2.00″September 17, 202619 cities · 1.50″

Every state with hail on record →

FAQ

US hail on August 13, 2026

NOAA radar put hail of an inch or more over 51 cities across 14 states on August 13, 2026. The largest stones — 2.00 inches, hen egg size — were over Denver, CO. Every state hit is listed on this page, and every city under it.

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