How big was the hail on April 21, 2025?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over New Castle, PA. 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 · April 21, 2025

Hail map — April 21, 2025

Name: US hail map — April 21, 2025
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 city across 1 state on April 21, 2025. The largest stones — 1.00″, quarter size — fell over New Castle, PA.

Hail swath map for New Castle, PA on April 21, 2025 showing 1.00 inch hail. — Largest rendered swath of the day: New Castle, PA — 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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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 April 21, 2025

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

Pennsylvania1 city · 1.00″

Hardest hit on April 21, 2025

New Castle, PA1.00″ · quarter

What people on the ground measured in the US on April 21, 2025

15 reports filed with the National Weather Service — 1 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 Public
4 NNW Boys Town, NE10:47 PM CDTDouglas County
1.75″ golf ball size Public
3 NW Omaha, NE10:55 PM CDTDouglas County
1.50″ half dollar size Public
Leshara, NE10:19 PM CDTSaunders County
1.50″ half dollar size NWS Employee
1 WNW Valley, NE10:26 PM CDTDouglas County
Somewhat flat, disk-shaped hail up to 1.5 inches in diameter. The largest hail was similar to cauliflower, a congealed hailstone made up of many very small hailstones.
1.50″ half dollar size Public
3 NE Elkhorn, NE10:44 PM CDTDouglas County
Report from mPING: Ping Pong Ball (1.50 in.).
1.50″ half dollar size Public
4 NW Omaha, NE10:58 PM CDTDouglas County
Report from mPING: Ping Pong Ball (1.50 in.).
1.50″ half dollar size Public
6 NNE Omaha, NE11:03 PM CDTDouglas County
1.50″ half dollar size Public
4 NE Omaha, NE11:04 PM CDTDouglas County
Report from mPING: Ping Pong Ball (1.50 in.).
1.25″ half dollar size Public
3 NE Elkhorn, NE10:38 PM CDTDouglas County
Report from mPING: Half Dollar (1.25 in.).
1.25″ half dollar size Public
Elkhorn, NE10:42 PM CDTDouglas County
Half Dollar.
1.25″ half dollar size Public
5 NW Omaha, NE10:52 PM CDTDouglas County
680 and Blair High Rd.
1.25″ half dollar size Public
3 NE Elkhorn, NE11:03 PM CDTDouglas County
Report from mPING: Half Dollar (1.25 in.).
1.25″ half dollar size Public
3 NNE Omaha, NE11:04 PM CDTDouglas County
1.00″ quarter size Public
Colon, NE10:06 PM CDTSaunders County
Snowball-like hail.
1.00″ quarter size Public
1 NW Elkhorn, NE10:40 PM CDTDouglas County
Report from mPING: Quarter (1.00 in.).

Showing the 15 largest of 22 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 April 21, 2025

NOAA radar put hail of an inch or more over 1 city across 1 state on April 21, 2025. The largest stones — 1.00 inches, quarter size — were over New Castle, PA. Every state hit is listed on this page, and every city under it.

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