Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 140, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 7:50 PM CDT for 6 counties in South Dakota. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2021, 7:50 PM CDT (00:50 UTC)
- Expired
- Aug 28, 2021, 8:30 PM CDT
- In force
- 40 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Bon Homme County, SD, Clay County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 103 km from the middle of the area, began a volume at 00:55 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 28, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.8 hours before the alert went out and 203 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
- 1806 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.8
The text
As transmitted.
096
WUUS53 KFSD 290050
SVRFSD
SDC009-027-067-083-125-135-290130-
/O.NEW.KFSD.SV.W.0140.210829T0050Z-210829T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
750 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northern Clay County in southeastern South Dakota...
Southwestern Lincoln County in southeastern South Dakota...
Southeastern Bon Homme County in southeastern South Dakota...
Yankton County in southeastern South Dakota...
Southern Turner County in southeastern South Dakota...
Southeastern Hutchinson County in southeastern South Dakota...
* Until 830 PM CDT.
* At 749 PM CDT, a severe thunderstorm was located over Tabor, or 8
miles northwest of Lewis And Clark State Recreation Area, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Utica around 800 PM CDT.
Other locations in the path of this severe thunderstorm include
Mayfield, Irene, Viborg and Hurley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4289 9798 4337 9719 4306 9680 4286 9737
4287 9741 4285 9744 4286 9750 4285 9758
4286 9762 4284 9769 4285 9777 4287 9785
4286 9787 4284 9788
TIME...MOT...LOC 0049Z 236DEG 43KT 4294 9768
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SG2 follow-up statements
866
WWUS53 KFSD 290103
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
803 PM CDT Sat Aug 28 2021
SDC009-027-067-083-125-135-290130-
/O.CON.KFSD.SV.W.0140.000000T0000Z-210829T0130Z/
Clay SD-Lincoln SD-Bon Homme SD-Yankton SD-Turner SD-Hutchinson SD-
803 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR NORTHERN CLAY...SOUTHWESTERN LINCOLN...SOUTHEASTERN BON HOMME...
YANKTON...SOUTHERN TURNER AND SOUTHEASTERN HUTCHINSON COUNTIES...
At 803 PM CDT, a severe thunderstorm was located over Utica, or 9
miles north of Lewis And Clark State Recreation Area, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Mayfield around 820 PM CDT.
Irene around 825 PM CDT.
Viborg around 835 PM CDT.
Hurley around 840 PM CDT.
Other locations impacted by this severe thunderstorm include
Lesterville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4336 9720 4306 9680 4286 9737 4287 9741
4285 9744 4286 9750 4285 9758 4286 9762
4284 9769 4285 9777 4285 9778 4288 9777
4291 9777 4302 9776
TIME...MOT...LOC 0103Z 235DEG 44KT 4300 9752
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SG912
WWUS53 KFSD 290130
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
830 PM CDT Sat Aug 28 2021
SDC009-027-067-083-125-135-290140-
/O.EXP.KFSD.SV.W.0140.000000T0000Z-210829T0130Z/
Clay SD-Lincoln SD-Bon Homme SD-Yankton SD-Turner SD-Hutchinson SD-
830 PM CDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLAY...SOUTHWESTERN
LINCOLN...SOUTHEASTERN BON HOMME...YANKTON...SOUTHERN TURNER AND
SOUTHEASTERN HUTCHINSON COUNTIES HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southeastern South Dakota.
LAT...LON 4336 9720 4306 9680 4286 9737 4287 9741
4285 9744 4286 9750 4285 9758 4286 9762
4284 9769 4285 9777 4285 9778 4288 9777
4291 9777 4302 9776
TIME...MOT...LOC 0130Z 236DEG 43KT 4315 9721
$$
SGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 7:23 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 52 min |
| Aug 28, 7:25 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Lake, McCook, Miner, Minnehaha, Moody | 50 min |
| Aug 28, 7:27 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Turner, Yankton | 48 min |
| Aug 28, 7:48 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Minnehaha, Moody, Turner | 31 min |
| Aug 28, 8:52 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 23 min |
| Aug 28, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 47 min |
| Aug 28, 9:20 PM CDT | Flash Flood Warning | FSD | Lincoln, Minnehaha | 85 min |
| Aug 28, 9:29 PM CDT | Flash Flood Warning | FSD | Lincoln, Minnehaha | 3 hr |
| Aug 28, 10:36 PM CDT | Flash Flood Warning | FSD | Lincoln, Minnehaha | 114 min |
| Aug 28, 11:46 PM CDT | River Flood Warning | FSD | Lincoln, Minnehaha | 8 hr |
| Aug 29, 7:44 AM CDT | River Flood Warning | FSD | Lincoln | 15 hr |
Nearby
Severe Thunderstorm Warnings in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.