South Dakota hail map — August 20, 2026
NOAA radar detected hail of an inch or more over 1 South Dakota city on August 20, 2026. The largest stones — 1.25″, half dollar size — fell over Sioux Falls.
Claim your live interactive hail map
Every address in South Dakota at once — three years of NOAA hail swaths drawn on a map you can zoom, filter and actually work.
$79/moall of South Dakota, not one storm day
- The August 20, 2026 swath — and every other storm since 2023 across South Dakota
- GPS door-knocking — pins, photos and who you have already hit
- Jobs, contacts, estimates and invoices included
- An alert the next time South Dakota gets hit
Running a crew? See the whole CRM in a 15-minute demo
HailTrace charges $229 for this one day, once. $79 here is all of South Dakota, every day.
- Cities hit
- 1
- in South Dakota
- Largest stone
- 1.25″
- half dollar size
- Impact rating
- 4/10
- from stone size
Sizes come from NOAA radar, which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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.
Check my addressFree, 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.
South Dakota cities hit on August 20, 2026
What people on the ground measured in South Dakota on August 20, 2026
11 reports filed with the National Weather Service — 2 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 PublicHumboldt, SD6:48 PM CDTMinnehaha County
- 1.50″ half dollar size Public5 NW Crooks, SD7:02 PM CDTMinnehaha County
Photo posted to social media. Time estimated based on radar.
- 1.25″ half dollar size Public2 W Hartford, SD7:00 PM CDTMinnehaha County
Photo posted to social media.
- 1.25″ half dollar size Cocorahs3 NE Crooks, SD7:10 PM CDTMinnehaha County
Minor leaf damage.
- 1.25″ half dollar size Public4 NE Crooks, SD7:10 PM CDTMinnehaha County
Hail may have been larger. The hail was still quarter size when found in the grass over 30 minutes after it fell.
- 1.00″ quarter size Trained Spotter2 W Baltic, SD7:14 PM CDTMinnehaha County
Report relayed from NWS Aberdeen office.
- 1.00″ quarter size Public5 ENE Crooks, SD7:15 PM CDTMinnehaha County
Report and photo via social media.
- 1.00″ quarter size Public4 S Sioux Falls, SD7:28 PM CDTLincoln County
- 1.00″ quarter size Public5 NE Lesterville, SD7:49 PM CDTYankton County
In addition to quarter sized hail, about 1 inch of rainfall came through in about 15 minutes.
- 0.88″ penny size Trained SpotterChancellor, SD8:13 PM CDTTurner County
- 0.75″ penny size Public4 S Colton, SD6:59 PM CDTMinnehaha County
Report from mPING: Dime (0.75 in.).
These are verified ground reports, updated 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 South Dakota hail days
Shopping for a hail app to work South Dakota?
This page is one storm. If you are deciding which tool to work South Dakota with all season, these compare the ones roofers actually buy — with every price taken from the vendor's own site and linked.
- Best hail tracking apps, comparedHailMate, HailTrace, Hail Recon, HailStrike and RadarScope — every published price sourced and linked, and who each one is genuinely right for.
- HailMate vs HailTraceStreet-level NOAA swaths on a map your crew can knock, with the CRM already inside — instead of quote-only meteorologist maps billed on top of one.
- Hail map apps for roofers (and the Hail Recon alternative)Every storm on one map instead of loading dates one at a time — plus the canvassing and the whole claim, monthly, for what one state costs them a year.
- Best canvassing apps, comparedHailMate, SalesRabbit, SPOTIO, Knockio, RoofLink and Badger Maps — every published price sourced and linked, and two of them publish none.
South Dakota hail on August 20, 2026
NOAA radar put hail of an inch or more over 1 South Dakota city that day. The largest stones — 1.25 inches, half dollar size — were over Sioux Falls. Every city hit is listed above with its own stone size.