How big was the hail on August 10, 2024?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Castle Rock, 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 · August 10, 2024

Hail map — August 10, 2024

Name: US hail map — August 10, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 city across 1 state on August 10, 2024. The largest stones — 1.00″, quarter size — fell over Castle Rock, CO.

Hail swath map for Castle Rock, CO on August 10, 2024 showing 1.00 inch hail. — Largest rendered swath of the day: Castle Rock, CO — 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

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 August 10, 2024

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

Colorado1 city · 1.00″

Hardest hit on August 10, 2024

Castle Rock, CO1.00″ · quarter

What people on the ground measured in the US on August 10, 2024

11 reports filed with the National Weather Service — 2 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.

1.25″ half dollar size Emergency Mngr
3 SE Palisades, ID1:30 PM MDTBonneville County
Bear Lake EM traveling through and sent picture of hail next to a quarter.
1.25″ half dollar size Public
4 SE Palisades, ID1:35 PM MDTBonneville County
*** 4 INJ *** Boat caught on Palisades Reservoir as severe thunderstorm moved overhead. Video captured heavy hail falling with some stones larger than quarters resulting in dents to the boat. 4 occupants received bruises from the hail. No other injuries. Time estimated based on radar.
1.25″ half dollar size Public
5 SE Palisades, ID1:36 PM MDTBonneville County
*** 2 INJ *** At least two additional injuries reported from another group caught out on Palisades Reservoir during the severe thunderstorm. Group took shelter under a surfboard and life jackets in the water, but received bruises and welts from the hail. Time estimated.
1.25″ half dollar size Public
5 E Mackay, ID3:51 PM MDTCuster County
Photo and video received via social media. Time estimated based on radar.
1.00″ quarter size Public
2 S Palisades, ID1:29 PM MDTBonneville County
Hail up to quarter size reported at Calamity Campground. Time estimated based on radar.
1.00″ quarter size Public
6 ESE Mackay, ID3:53 PM MDTCuster County
Time estimated based on radar.
1.00″ quarter size Public
2 NW Castlewood Canyon, CO4:48 PM MDTDouglas County
Report from mPING: Quarter (1.00 in.).
0.88″ penny size Public
2 SE Irwin, ID1:24 PM MDTBonneville County
Estimated dime to nickel size hail across from Palisades Campground. Time estimated based on radar.
0.75″ penny size Trained Spotter
9 NW Canyon Creek, MT5:15 PM MDTLewis and Clark County
Hail up to penny size in drifts up to 8 inches deep found on Sunday August 11th. Hail was likely larger when it fell on the 10th. Time estimated.
0.70″ penny size Public
1 S Swan Valley, ID1:20 PM MDTBonneville County
Largest size estimated. On the boundary between Swan Valley and Irwin. Time estimated based on radar.
0.50″ penny size Public
1 NNW Darlington, ID4:03 PM MDTCuster County
Along US-93. Time estimated based on radar.

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 August 10, 2024

NOAA radar put hail of an inch or more over 1 city across 1 state on August 10, 2024. The largest stones — 1.00 inches, quarter size — were over Castle Rock, 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