Hail in Denver on Wednesday, June 21, 2023
The Storm Prediction Center logged 28 hail reports in Denver on Wednesday, June 21, 2023, between 6:11 pm and 11:38 pm MDT, in 5 of the metro's 7 counties. The largest was 2.00 inches at Red Rocks Park (Jefferson County) at 9:26 pm. NOAA radar flagged 1,538 hail signatures inside the metro that day: 476 rated a 100% chance of hail and 366 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 13 places in Adams, Boulder, Denver, Douglas and Jefferson counties, named as the National Weather Service described them.
- Denver 10 reports, up to 1.50 in
- Evergreen 3 reports, up to 1.75 in
- Lakewood 3 reports, up to 1.50 in
- Ponderosa Park 2 reports, up to 1.50 in
- Todd Creek 2 reports, up to 1.00 in
- Aspen Park 1 report, up to 1.00 in
- Boulder 1 report, up to 1.00 in
- Castlewood Canyon 1 report, up to 1.00 in
- Crescent Village 1 report, up to 1.00 in
- Indian Hills 1 report, up to 1.75 in
- Morrison 1 report, up to 1.25 in
- Red Rocks Park 1 report, up to 2.00 in
- Thornton 1 report, up to 1.00 in
Every hail report logged that day
Times are Mountain Daylight Time. Sizes are in inches, as reported. The comment is the National Weather Service's text as published in the Storm Prediction Center's daily log.
| Time | Size | Place | County | NWS comment |
|---|---|---|---|---|
| 6:11 pm | 1.00 | 3 SSE Boulder | Boulder | (BOU) |
| 6:36 pm | 1.00 | 1 SSW Crescent Village | Jefferson | Report from mPING: Quarter (1.00 in.). (BOU) |
| 6:54 pm | 1.00 | 2 NE Thornton | Adams | Report from mPING: Quarter (1.00 in.). (BOU) |
| 7:08 pm | 1.00 | 1 SW Todd Creek | Adams | Largest hail stone found so far. Time estimated from radar. (BOU) |
| 7:41 pm | 1.00 | 1 SW Todd Creek | Adams | Report from mPING: Quarter (1.00 in.). (BOU) |
| 8:37 pm | 1.50 | 2 ENE Lakewood | Jefferson | Report via social media. Time estimated. (BOU) |
| 8:42 pm | 1.25 | 1 S Denver | Denver | Report and photo via social media. (BOU) |
| 8:46 pm | 1.25 | 2 S Denver | Denver | Report and photo via social media. (BOU) |
| 8:47 pm | 1.00 | 1 SE Denver | Denver | Report via social media. (BOU) |
| 8:49 pm | 1.00 | 2 E Denver | Denver | Report via social media. Time and location estimated. (BOU) |
| 8:53 pm | 1.25 | 4 E Denver | Denver | (BOU) |
| 9:00 pm | 1.50 | 1 SSE Evergreen | Jefferson | Reported by a CoCoRaHS observer. Time estimated. (BOU) |
| 9:02 pm | 1.75 | 1 SSE Evergreen | Jefferson | Falling at time of report. (BOU) |
| 9:08 pm | 1.75 | 1 ESE Evergreen | Jefferson | Report via social media. Time estimated by radar. (BOU) |
| 9:16 pm | 1.75 | 2 NW Indian Hills | Jefferson | Report via social media. Time estimated by radar. (BOU) |
| 9:26 pm | 2.00 | Red Rocks Park | Jefferson | *** 90 INJ *** Numerous reports of ping pong to 2 inch diameter hail in Red Rocks park. At least several dozen injuries treated on scene... with 7 hospitalizations. Inj (BOU) |
| 9:34 pm | 1.25 | 2 NE Morrison | Jefferson | Report via social media. Time estimated by radar. (BOU) |
| 9:35 pm | 1.00 | 1 SW Lakewood | Jefferson | Report via social media. (BOU) |
| 9:35 pm | 1.00 | 2 WSW Lakewood | Jefferson | Report via social media. (BOU) |
| 9:38 pm | 1.00 | 3 SSE Denver | Denver | Report via social media. Time estimated by radar. (BOU) |
| 9:42 pm | 1.25 | 3 SE Denver | Denver | Report via social media. Time estimated by radar. (BOU) |
| 9:42 pm | 1.00 | 3 SE Denver | Denver | Report and photo via social media. Time and location estimated. (BOU) |
| 9:43 pm | 1.50 | 4 E Denver | Denver | Second storm. Falling at the time of report again. (BOU) |
| 9:44 pm | 1.00 | 4 ESE Denver | Denver | Report from mPING: Quarter (1.00 in.). (BOU) |
| 9:48 pm | 1.00 | 6 SSE Castlewood Canyon | Douglas | Dime to quarter size hail. (BOU) |
| 9:56 pm | 1.00 | 2 W Ponderosa Park | Douglas | Report from mPING: Quarter (1.00 in.). (BOU) |
| 10:02 pm | 1.50 | 2 W Ponderosa Park | Douglas | Report from mPING: Ping Pong Ball (1.50 in.). (BOU) |
| 11:38 pm | 1.00 | 1 WSW Aspen Park | Jefferson | Report via social media. Time estimated by radar. (BOU) |
What NEXRAD radar recorded inside the metro
1,538 signatures from 5 radars fell inside the metro's counties on this local date, counting every cell the algorithm rated from a 10% to a 100% chance of hail; 476 were rated 100% and 29 had a maximum expected size of 2 inches or more.
| Radar | Signatures | Rated 100% | 1 in or more | 2 in or more | Largest expected | First | Last |
|---|---|---|---|---|---|---|---|
| KDEN | 597 | 164 | 138 | 7 | 2.50 in | 3:06 pm | 11:56 pm |
| KPUX | 320 | 117 | 80 | 9 | 3.75 in | 3:02 pm | 11:56 pm |
| KCYS | 308 | 114 | 77 | 7 | 3.25 in | 3:05 pm | 11:46 pm |
| KFTG | 252 | 59 | 56 | 6 | 3.00 in | 3:05 pm | 11:55 pm |
| KGLD | 61 | 22 | 15 | 0 | 1.75 in | 4:29 pm | 11:35 pm |
Each radar that scans a storm writes its own signature about every 4 to 6 minutes, so one storm produces many rows and overlapping radars count it more than once. The raw rows for this day are in NOAA's Severe Weather Data Inventory.
Check an address for June 21, 2023
See, free, how many hail signatures NOAA recorded within 1, 3 and 5 miles of one address that day and the nearest spotter report. The full report is $19.
Spotter reports come from the Storm Prediction Center's preliminary daily logs, grouped here by local calendar date (Mountain Daylight Time) and by county: a report counts for Denver when its coordinates fall inside one of the metro's 7 counties (Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and Jefferson counties). Radar signatures are estimates from the Hail Detection Algorithm, not measured stones; they include every cell it rated, from a 10% to a 100% probability of hail. How these pages are built.