Hail map — September 20, 2023
NOAA radar detected hail of an inch or more over 7 cities across 3 states on September 20, 2023. The largest stones — 1.00″, quarter size — fell over Memphis, TN.
- States hit
- 3
- Cities hit
- 7
- 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.
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States hit on September 20, 2023
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 September 20, 2023
10 reports filed with the National Weather Service — 5 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 Trained Spotter6 NE Ottumwa, SD8:33 PM CDTHaakon County
Lots of quarter size hail, some as big as golfballs.
- 1.75″ golf ball size Public5 S Hayes, SD8:55 PM CDTStanley County
- 1.50″ half dollar size Public6 WNW Okaton, SD7:50 PM CDTJones County
Largest stones were quarter to ping pong size.
- 1.25″ half dollar size Public9 N Cedar Butte, SD7:49 PM CDTMellette County
mPING report
- 0.88″ penny size Trained Spotter9 N Cedar Butte, SD7:45 PM CDTMellette County
- 0.50″ penny size Trained SpotterRandolph, IA3:45 AM CDTFremont County
Delayed report.
- 0.50″ penny size Broadcast Media2 ESE Palm Harbor, FL3:23 PM EDTPinellas County
Half hail inch reported by local broadcast meteorologist.
- 0.50″ penny size Public2 W East Lake-Orient Pa, FL4:17 PM EDTHillsborough County
Video from public of half inch hail.
- 0.50″ penny size Trained Spotter7 E Pocatello, ID2:58 PM MDTBannock County
Covered deck.
- 0.25″ penny size Trained Spotter3 ENE Pocatello, ID3:48 PM MDTBannock County
Accumulating.
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 September 20, 2023
NOAA radar put hail of an inch or more over 7 cities across 3 states on September 20, 2023. The largest stones — 1.00 inches, quarter size — were over Memphis, TN. Every state hit is listed on this page, and every city under it.