Hail in Sioux Falls on Thursday, August 5, 2021
The Storm Prediction Center logged 8 hail reports in Sioux Falls on Thursday, August 5, 2021, between 8:24 pm and 11:49 pm CDT, in 1 of the metro's 4 counties. The largest was 3.50 inches at 5 N Sioux Falls (Minnehaha County) at 8:50 pm. NOAA radar flagged 148 hail signatures inside the metro that day: 66 rated a 100% chance of hail and 70 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 6 places in Minnehaha County, named as the National Weather Service described them.
- Crooks 2 reports, up to 2.50 in
- Rowena 2 reports, up to 2.00 in
- Baltic 1 report, up to 1.00 in
- Brandon 1 report, up to 1.50 in
- Dell Rapids 1 report, up to 1.00 in
- Sioux Falls 1 report, up to 3.50 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 |
|---|---|---|---|---|
| 8:24 pm | 1.00 | Dell Rapids | Minnehaha | VIA SOCIAL MEDIA. (FSD) |
| 8:35 pm | 1.00 | Baltic | Minnehaha | REPORT VIA SOCIAL MEDIA. (FSD) |
| 8:50 pm | 3.50 | 5 N Sioux Falls | Minnehaha | VIA PICTURE ON SOCIAL MEDIA. (FSD) |
| 9:00 pm | 1.50 | Brandon | Minnehaha | VIA SOCIAL MEDIA PICTURE. (FSD) |
| 9:04 pm | 2.50 | 5 ESE Crooks | Minnehaha | REPORT VIA SOCIAL MEDIA. (FSD) |
| 9:08 pm | 1.00 | 4 WNW Rowena | Minnehaha | (FSD) |
| 9:10 pm | 2.00 | 4 WNW Rowena | Minnehaha | (FSD) |
| 11:49 pm | 1.00 | Crooks | Minnehaha | VIDEO VIA SOCIAL MEDIA. (FSD) |
What NEXRAD radar recorded inside the metro
148 signatures from 3 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; 66 were rated 100% and 22 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 |
|---|---|---|---|---|---|---|---|
| KFSD | 69 | 20 | 31 | 8 | 3.00 in | 8:18 pm | 11:58 pm |
| KOAX | 42 | 22 | 19 | 8 | 3.25 in | 9:50 pm | 11:23 pm |
| KABR | 37 | 24 | 20 | 6 | 2.50 in | 8:20 pm | 11:58 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 August 5, 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 Sioux Falls when its coordinates fall inside one of the metro's 4 counties (Minnehaha, Lincoln, Turner and McCook 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.