Hail in Sioux Falls on Saturday, August 28, 2021
The Storm Prediction Center logged 9 hail reports in Sioux Falls on Saturday, August 28, 2021, between 3:32 pm and 7:50 pm CDT, in 3 of the metro's 4 counties. The largest was 1.75 inches at 3 S Salem (McCook County) at 7:20 pm. NOAA radar flagged 372 hail signatures inside the metro that day: 196 rated a 100% chance of hail and 150 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 6 places in Lincoln, McCook and Turner counties, named as the National Weather Service described them.
- Canton 2 reports, up to 1.25 in
- Harrisburg 2 reports, up to 1.00 in
- Salem 2 reports, up to 1.75 in
- Canistota 1 report, up to 1.50 in
- Hurley 1 report, up to 1.00 in
- Orland 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 |
|---|---|---|---|---|
| 3:32 pm | 1.00 | 6 SW Orland | McCook | HAIL MOSTLY DIME TO NICKEL SIZED... BUT SOME AS BIG AS QUARTERS. ALSO HEAVY RAIN. (FSD) |
| 4:15 pm | 1.00 | Hurley | Turner | QUARTER SIZED HAIL. (FSD) |
| 6:52 pm | 1.25 | 5 WSW Canton | Lincoln | PICTURE VIA SOCIAL MEDIA. (FSD) |
| 6:55 pm | 1.00 | 1 W Harrisburg | Lincoln | REPORT FROM MPING: QUARTER (1.00 IN.). (FSD) |
| 6:55 pm | 1.00 | Harrisburg | Lincoln | REPORT FROM MPING: QUARTER (1.00 IN.). (FSD) |
| 6:58 pm | 1.75 | Salem | McCook | (FSD) |
| 7:16 pm | 1.00 | 2 NE Canton | Lincoln | A FEW QUARTERS... MOSTLY NICKEL. (FSD) |
| 7:20 pm | 1.75 | 3 S Salem | McCook | REPORT FROM SOCIAL MEDIA... HALF DOLLAR TO GOLF BALL SIZE HAIL. (FSD) |
| 7:50 pm | 1.50 | 5 E Canistota | McCook | REPORT VIA SOCIAL MEDIA FROM LAKE VERMILLION. (FSD) |
What NEXRAD radar recorded inside the metro
372 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; 196 were rated 100% and 50 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 | 189 | 78 | 65 | 20 | 3.50 in | 9:13 am | 10:48 pm |
| KOAX | 117 | 75 | 56 | 24 | 4.00 in | 9:06 am | 10:53 pm |
| KABR | 66 | 43 | 29 | 6 | 2.50 in | 3:12 pm | 10:33 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 28, 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.