Hail map — August 18, 2026
NOAA radar detected hail of an inch or more over 6 cities across 5 states on August 18, 2026. The largest stones — 1.50″, half dollar size — fell over Rapid City, SD.
- States hit
- 5
- Cities hit
- 6
- Largest stone
- 1.50″
- half dollar size
- Impact rating
- 5/10
- 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.
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States hit on August 18, 2026
Every state where NOAA radar put an inch or more of hail over a city that day, biggest stone first.
What people on the ground measured in the US on August 18, 2026
15 reports filed with the National Weather Service — 8 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 Public6 SW Milford, KS9:12 PM CDTDickinson County
- 1.50″ half dollar size Trained Spotter4 WSW Dwtn Rapid City, SD8:59 PM CDTPennington County
Time estimated via radar.
- 1.50″ half dollar size Public5 SW Dwtn Rapid City, SD9:01 PM CDTPennington County
Report sent to media livestream then relayed via Slack
- 1.50″ half dollar size Public5 SSW Dwtn Rapid City, SD9:06 PM CDTPennington County
Report sent to media livestream then relayed via Slack.
- 1.50″ half dollar size Trained Spotter7 NNE Chapman, KS9:10 PM CDTDickinson County
Corrects previous hail report from 7 NNE Chapman.
- 1.50″ half dollar size Trained Spotter7 NNE Chapman, KS9:16 PM CDTDickinson County
- 1.50″ half dollar size Public4 SSW Onaga, KS10:52 PM CDTPottawatomie County
Delayed report. Relayed from social media.
- 1.25″ half dollar size Public1 WNW Onalaska, WI3:23 PM CDTLa Crosse County
- 1.25″ half dollar size Trained Spotter1 NNE Brownsville, SD8:11 PM CDTLawrence County
Mixed hail sizes up to half-dollar size.
- 1.25″ half dollar size Trained Spotter8 NNW Moonlight, KS8:52 PM CDTDickinson County
- 1.25″ half dollar size NWS Employee4 S Dwtn Rapid City, SD9:08 PM CDTPennington County
- 1.25″ half dollar size Trained Spotter1 SW Junction City, KS9:18 PM CDTGeary County
- 1.25″ half dollar size Trained Spotter5 S Onaga, KS11:02 PM CDTPottawatomie County
- 1.00″ quarter size PublicCrete, NE4:00 AM CDTSaline County
- 1.00″ quarter size Public2 SSE Viola, MN2:39 PM CDTOlmsted County
Showing the 15 largest of 35 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
US hail on August 18, 2026
NOAA radar put hail of an inch or more over 6 cities across 5 states on August 18, 2026. The largest stones — 1.50 inches, half dollar size — were over Rapid City, SD. Every state hit is listed on this page, and every city under it.