How big was the hail on August 15, 2023?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Winston-Salem, NC. 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 15, 2023

Hail map — August 15, 2023

Name: US hail map — August 15, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 38 cities across 7 states on August 15, 2023. The largest stones — 2.00″, hen egg size — fell over Winston-Salem, NC.

Hail swath map for Winston-Salem, NC on August 15, 2023 showing 2.00 inch hail. — Largest rendered swath of the day: Winston-Salem, NC — 2.00″ hail. Each city below has its own map for this storm.

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The August 15, 2023 swath — and every other storm since 2023 across your state
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States hit: 7
Cities hit: 38
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

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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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States hit on August 15, 2023

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

North Carolina6 cities · 2.00″Florida20 cities · 1.00″Louisiana3 cities · 1.00″Georgia1 city · 1.00″Alabama3 cities · 1.00″South Carolina4 cities · 1.00″Maryland1 city · 1.00″

Hardest hit on August 15, 2023

Showing the 24 largest of 38 cities hit. The rest are under their state above.

What people on the ground measured in the US on August 15, 2023

15 reports filed with the National Weather Service — 5 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 WNW Pleasant Garden, NC3:39 PM EDTGuilford County
Report from mPING: Golf Ball (1.75 in.).
1.75″ golf ball size Public
1 NNW Phoenix, GA4:24 PM EDTPutnam County
Corrects previous hail report from 1 NNW Phoenix. Golf ball sized hail reported near the intersection of Harmony Ln and Harmony Rd.
1.75″ golf ball size Public
1 NNE Phoenix, GA4:25 PM EDTPutnam County
Golf ball hail reported at Hwy 44 and Thunder Rd.
1.75″ golf ball size Public
1 NNW Phoenix, GA4:40 PM EDTPutnam County
Golf ball sized hail reported near the intersection of Harmony Ln and Harmony Rd.
1.25″ half dollar size Public
7 SSE Sedge Garden, NC3:05 PM EDTDavidson County
1.00″ quarter size Public
3 SSW Surl, NC2:20 PM EDTPerson County
Social media report.
1.00″ quarter size Trained Spotter
Mocksville, NC2:25 PM EDTDavie County
A trained spotter heard reports of quarter sized hail on the east side of Mocksville with the storm Tuesday afternoon.
1.00″ quarter size Amateur Radio
1 SSE South Henderson, NC2:45 PM EDTVance County
1.00″ quarter size Trained Spotter
2 NNE Welcome, NC2:48 PM EDTDavidson County
1.00″ quarter size Broadcast Media
2 NNW Archdale, NC3:06 PM EDTGuilford County
Report from WGHP studio of 1 inch hail falling.
1.00″ quarter size Trained Spotter
2 WSW Penn Twp, PA4:05 PM EDTBerks County
Report relayed via trained spotter. Hail ranging from marble (1/2) to quarter (1) size.
1.00″ quarter size Local Official
3 SSE Raleigh, NC4:50 PM EDTWake County
1.00″ quarter size Broadcast Media
Hebron, MD5:05 PM EDTWicomico County
Time estimated from radar.
1.00″ quarter size Trained Spotter
1 WSW Emmaus, PA5:08 PM EDTLehigh County
Report relayed via trained spotter.
0.75″ penny size Public
3 WSW Meadville, PA6:48 PM EDTCrawford County
Report from mPING: Dime (0.75 in.).

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

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 15, 2023

NOAA radar put hail of an inch or more over 38 cities across 7 states on August 15, 2023. The largest stones — 2.00 inches, hen egg size — were over Winston-Salem, NC. Every state hit is listed on this page, and every city under it.

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