How big was the hail on October 2, 2023?

The maximum estimated stone size anywhere in South Dakota that day was 1.00 inches. 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.

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 the whole of South Dakota on a real interactive map with this swath and three years of others already on it. $79/mo, and the canvassing tools come with it.

South Dakota · October 2, 2023

South Dakota hail map — October 2, 2023

Name: South Dakota hail map — October 2, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 South Dakota city on October 2, 2023. The largest stones — 1.00″, quarter size — fell over Rapid City.

Hail swath map for Rapid City, SD on October 2, 2023 showing 1.00 inch hail. — Swath over Rapid City on October 2, 2023 — 1.00″ hail. Each city below has its own map for this storm.

Cities hit: 1; in South Dakota
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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All of South Dakota at street level, with this storm already on it
Three years of hail swaths, filterable by stone size
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Homeowners

Did hail hit your address?

This page covers South Dakota 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.

South Dakota cities hit on October 2, 2023

Rapid City, SD1.00″ · quarter

What people on the ground measured in South Dakota on October 2, 2023

11 reports filed with the National Weather Service — 7 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.

1.50″ half dollar size NWS Employee
7 NNE Ellsworth AFB, SD8:56 PM CDTMeade County
1.25″ half dollar size NWS Employee
7 NNE Ellsworth AFB, SD8:53 PM CDTMeade County
1.00″ quarter size Trained Spotter
Argyle, SD7:57 PM CDTCuster County
Time estimated from radar.
1.00″ quarter size Public
2 E Dwtn Rapid City, SD8:32 PM CDTPennington County
1.00″ quarter size Public
3 NE Dwtn Rapid City, SD8:32 PM CDTPennington County
1.00″ quarter size Public
Rapid City Arpt, SD9:21 PM CDTPennington County
mPING report
0.70″ penny size Trained Spotter
6 SSE Hot Springs, SD8:20 PM CDTFall River County
Pea to dime sized hail. Time estimated from radar.
0.50″ penny size Public
2 E Dwtn Rapid City, SD8:29 PM CDTPennington County
0.50″ penny size Official NWS Obs
1 E Dwtn Rapid City, SD8:30 PM CDTPennington County
0.50″ penny size Trained Spotter
5 WNW Hermosa, SD8:35 PM CDTCuster County
0.50″ penny size NWS Employee
7 SW Rapid City Arpt, SD9:03 PM CDTPennington County

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 states hit on October 2, 2023

Virginia1 city · 1.00″New Mexico1 city · 1.00″

The full US hail map for October 2, 2023 →

Other South Dakota hail days

August 18, 20261 city · 1.50″August 16, 20261 city · 1.00″August 11, 20261 city · 1.00″August 7, 20261 city · 1.00″July 24, 20261 city · 1.00″July 6, 20261 city · 1.00″July 4, 20261 city · 1.00″July 1, 20261 city · 1.00″June 22, 20261 city · 1.50″May 24, 20261 city · 1.00″May 17, 20261 city · 1.50″February 28, 20261 city · 1.00″

Every hail day across South Dakota →

FAQ

South Dakota hail on October 2, 2023

NOAA radar put hail of an inch or more over 1 South Dakota city that day. The largest stones — 1.00 inches, quarter size — were over Rapid City. Every city hit is listed above with its own stone size.

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