Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 74, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 5, 2021, 8:24 PM CDT for Rock County, Minnesota; Minnehaha County, Moody County, South Dakota. It was in force for 51 min. 8 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 5, 2021, 8:24 PM CDT (01:24 UTC)
- Expired
- Aug 5, 2021, 9:15 PM CDT
- In force
- 51 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 1.75 in
- Wind
- 70.0 mph
Counties Rock County, MN, Minnehaha County, SD, Moody County, SD
The radar
The Sioux Falls radar (KFSD), 15 km from the middle of the area, began a volume at 01:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 8:24 PM CDT | HAIL 1 | Dell Rapids, SD | VIA SOCIAL MEDIA. |
| Aug 5, 8:35 PM CDT | HAIL 1 | Baltic, SD | REPORT VIA SOCIAL MEDIA. |
| Aug 5, 8:50 PM CDT | HAIL 3.5 | 5 N Sioux Falls, SD | VIA PICTURE ON SOCIAL MEDIA. |
| Aug 5, 8:59 PM CDT | TSTM WND DMG | 4 Ese Sioux Falls, SD | SEVERAL 8 YEAR OLD PINE TREES UPROOTED. TIME ESTIMATED BY RADAR. VIA SOCIAL MEDIA PICTURE. |
| Aug 5, 9:00 PM CDT | HAIL 1.5 | Brandon, SD | VIA SOCIAL MEDIA PICTURE. |
| Aug 5, 9:04 PM CDT | HAIL 2.5 | 5 Ese Crooks, SD | REPORT VIA SOCIAL MEDIA. |
| Aug 5, 9:08 PM CDT | HAIL 1 | 4 Wnw Rowena, SD | |
| Aug 5, 9:10 PM CDT | HAIL 2 | 4 Wnw Rowena, SD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.4 hours before the alert went out and 185 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 835 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1549 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 259 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
319
WUUS53 KFSD 060124
SVRFSD
MNC133-SDC099-101-060215-
/O.NEW.KFSD.SV.W.0074.210806T0124Z-210806T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
824 PM CDT Thu Aug 5 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Western Rock County in southwestern Minnesota...
South central Moody County in east central South Dakota...
Central Minnehaha County in southeastern South Dakota...
* Until 915 PM CDT.
* At 824 PM CDT, a severe thunderstorm was located near Dell Rapids,
or 18 miles north of Sioux Falls, moving south at 20 mph.
HAZARD...Golf ball size hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
* This severe thunderstorm will be near...
Baltic around 835 PM CDT.
Other locations in the path of this severe thunderstorm include
Crooks, Sioux Falls and Brandon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4383 9691 4389 9667 4355 9641 4350 9692
TIME...MOT...LOC 0124Z 338DEG 18KT 4381 9679
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
SSCThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 7:12 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Pipestone | 48 min |
| Aug 5, 7:28 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone | 32 min |
| Aug 5, 7:53 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles, Pipestone, Rock | 41 min |
| Aug 5, 8:32 PM CDT | Severe Thunderstorm Warning | FSD | Nobles | 43 min |
| Aug 5, 8:57 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 48 min |
| Aug 5, 7:00 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 45 min |
| Aug 5, 7:44 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 33 min |
| Aug 5, 7:58 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Minnehaha, Moody | 47 min |
| Aug 5, 9:04 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 28 min |
| Aug 5, 10:04 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, McCook, Minnehaha, Turner | 41 min |
| Aug 5, 10:36 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner, Union | 39 min |
| Aug 5, 11:40 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 50 min |
| Aug 6, 12:10 AM CDT | Severe Thunderstorm Warning | FSD | Union | 35 min |
| Aug 6, 1:06 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 39 min |
| Aug 6, 1:36 AM CDT | Severe Thunderstorm Warning | FSD | Union | 24 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2021Severe Thunderstorm Warnings in Minnesota, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.