Hail in Des Moines on Friday, June 18, 2021
The Storm Prediction Center logged 6 hail reports in Des Moines on Friday, June 18, 2021, between 10:09 pm and 11:46 pm CDT, in 1 of the metro's 6 counties. The largest was 1.75 inches at 7 W Lacona (Warren County) at 10:20 pm. NOAA radar flagged 195 hail signatures inside the metro that day: 136 rated a 100% chance of hail and 123 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 4 places in Warren County, named as the National Weather Service described them.
- Lacona 3 reports, up to 1.75 in
- Cumming 1 report, up to 1.00 in
- Indianola 1 report, up to 1.00 in
- New Virginia 1 report, up to 1.00 in
Every hail report logged that day
Times are Central 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 |
|---|---|---|---|---|
| 10:09 pm | 1.00 | 6 ENE New Virginia | Warren | DELAYED REPORT FROM LAST NIGHT. (DMX) |
| 10:20 pm | 1.75 | 7 W Lacona | Warren | DELAYED REPORT. 72 HOUR RAINFALL TOTAL 6/18 TO 6/21 OF 4.24 INCHES AS WELL. (DMX) |
| 10:20 pm | 1.25 | 6 W Lacona | Warren | DELAYED REPORT OF HALF DOLLAR SIZED HAIL RELAYED VIA SOCIAL MEDIA. (DMX) |
| 10:33 pm | 1.25 | 6 W Lacona | Warren | (DMX) |
| 11:08 pm | 1.00 | 1 WNW Indianola | Warren | (DMX) |
| 11:46 pm | 1.00 | 3 SSE Cumming | Warren | DELAYED REPORT. TIME ESTIMATED FROM RADAR. (DMX) |
What NEXRAD radar recorded inside the metro
195 signatures from 2 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; 136 were rated 100% and 31 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 |
|---|---|---|---|---|---|---|---|
| KDMX | 116 | 84 | 72 | 21 | 2.75 in | 9:38 pm | 11:55 pm |
| KOAX | 79 | 52 | 51 | 10 | 2.25 in | 9:33 pm | 11:57 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 18, 2021
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 (Central Daylight Time) and by county: a report counts for Des Moines when its coordinates fall inside one of the metro's 6 counties (Polk, Dallas, Warren, Madison, Jasper and Story 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.