Hail map — July 31, 2023
NOAA radar detected hail of an inch or more over 8 cities across 3 states on July 31, 2023. The largest stones — 1.50″, half dollar size — fell over Fort Collins, CO.
- States hit
- 3
- Cities hit
- 8
- 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 July 31, 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 July 31, 2023
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.
- 1.50″ half dollar size Public6 SE Weston, WY5:20 PM MDTCampbell County
- 1.50″ half dollar size Emergency Mngr7 NW Bowman Haley Dam, ND9:21 PM CDTBowman County
Nickel and dime size hail still occurring 8 minutes after ping pong ball size hail was observed.
- 1.50″ half dollar size Trained Spotter6 NNE Colorado Springs, CO8:25 PM MDTEl Paso County
- 1.25″ half dollar size Trained Spotter6 NNW Kiowa, CO7:55 PM MDTElbert County
- 1.25″ half dollar size Public3 ESE Laporte, CO8:00 PM MDTLarimer County
Report from mPing.
- 1.25″ half dollar size Public5 NE Colorado Springs, CO8:10 PM MDTEl Paso County
Report from mPING: Half Dollar (1.25 in.).
- 1.25″ half dollar size Trained Spotter3 NNW Colorado Springs, CO8:13 PM MDTEl Paso County
- 1.25″ half dollar size Public7 SW Black Forest, CO8:20 PM MDTEl Paso County
Report from mPING: Half Dollar (1.25 in.).
- 1.00″ quarter size Public1 N Prescott Courthouse, AZ3:00 PM MSTYavapai County
Spotter showed an photo of a mixture of dime, nickel and quarter sized hail.
- 1.00″ quarter size Trained Spotter2 NNW Nunn, CO6:46 PM MDTWeld County
Report from mPING: Quarter (1.00 in.).
- 1.00″ quarter size Amateur Radio4 NNE Colorado Springs, CO8:06 PM MDTEl Paso County
- 1.00″ quarter size Trained Spotter3 NE Colorado Springs, CO8:09 PM MDTEl Paso County
- 1.00″ quarter size Trained Spotter6 ENE Black Forest, CO8:14 PM MDTEl Paso County
- 1.00″ quarter size Public6 NNE Colorado Springs, CO8:15 PM MDTEl Paso County
- 1.00″ quarter size Trained Spotter5 NNE Colorado Springs, CO8:16 PM MDTEl Paso County
Showing the 15 largest of 32 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 July 31, 2023
NOAA radar put hail of an inch or more over 8 cities across 3 states on July 31, 2023. The largest stones — 1.50 inches, half dollar size — were over Fort Collins, CO. Every state hit is listed on this page, and every city under it.