Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 15, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 11, 2021, 3:39 AM CDT for 4 counties in South Dakota. It was in force for 51 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
- Jun 11, 2021, 3:39 AM CDT (08:39 UTC)
- Expired
- Jun 11, 2021, 4:30 AM CDT
- In force
- 51 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Aurora County, SD, Charles Mix County, SD, Douglas County, SD, Gregory County, SD
The radar
The Sioux Falls radar (KFSD), 162 km from the middle of the area, began a volume at 08:42 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 |
|---|---|---|---|
| Jun 11, 2:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 8.7 hours before the alert went out and 168 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
- 1337 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 2725 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted.
527
WUUS53 KFSD 110839
SVRFSD
SDC003-023-043-053-110930-
/O.NEW.KFSD.SV.W.0015.210611T0839Z-210611T0930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
339 AM CDT Fri Jun 11 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Aurora County in south central South Dakota...
Central Charles Mix County in south central South Dakota...
Southeastern Gregory County in south central South Dakota...
Northwestern Douglas County in south central South Dakota...
* Until 430 AM CDT.
* At 339 AM CDT, severe thunderstorms were located along a line
extending from 8 miles southeast of Gann Valley to near Kimball to
near Gregory, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
White Lake around 355 AM CDT.
Plankinton around 410 AM CDT.
Bonesteel and Storla around 415 AM CDT.
Other locations impacted by these severe thunderstorms include
Fairfax and northwestern Yankton Sioux Tribal Nation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4300 9915 4350 9879 4393 9881 4394 9833
4350 9832 4300 9850
TIME...MOT...LOC 0839Z 274DEG 38KT 4393 9889 4379 9893 4316 9944
HAIL...<.75IN
WIND...60MPH
$$
Schumacher2 follow-up statements
063
WWUS53 KFSD 110915
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
415 AM CDT Fri Jun 11 2021
SDC003-023-043-053-110930-
/O.CON.KFSD.SV.W.0015.000000T0000Z-210611T0930Z/
Aurora SD-Charles Mix SD-Gregory SD-Douglas SD-
415 AM CDT Fri Jun 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CDT
FOR AURORA...CENTRAL CHARLES MIX...SOUTHEASTERN GREGORY AND
NORTHWESTERN DOUGLAS COUNTIES...
At 414 AM CDT, severe thunderstorms were located along a line
extending from near Storla to 6 miles northeast of Geddes to
Bonesteel, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Harrison and Storla around 420 AM CDT.
Corsica around 430 AM CDT.
Lake Andes and Pickstown around 440 AM CDT.
Other locations impacted by these severe thunderstorms include
Fairfax and northwestern Yankton Sioux Tribal Nation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4300 9915 4350 9878 4393 9865 4394 9833
4350 9832 4300 9850
TIME...MOT...LOC 0914Z 273DEG 43KT 4391 9844 4333 9864 4310 9895
HAIL...<.75IN
WIND...60MPH
$$
Schumacher541
WWUS53 KFSD 110927
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
427 AM CDT Fri Jun 11 2021
SDC003-023-043-053-110937-
/O.EXP.KFSD.SV.W.0015.000000T0000Z-210611T0930Z/
Aurora SD-Charles Mix SD-Gregory SD-Douglas SD-
427 AM CDT Fri Jun 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR AURORA...CENTRAL CHARLES
MIX...SOUTHEASTERN GREGORY AND NORTHWESTERN DOUGLAS COUNTIES WILL
EXPIRE AT 430 AM CDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
south central, central, southeastern and east central South Dakota.
LAT...LON 4300 9915 4350 9878 4393 9865 4394 9833
4350 9832 4300 9850
TIME...MOT...LOC 0927Z 274DEG 38KT 4390 9827 4332 9847 4309 9879
$$
SchumacherThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:13 AM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix, Gregory | 47 min |
| Jun 11, 3:26 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Jerauld | 64 min |
| Jun 11, 4:59 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 46 min |
| Jun 11, 5:04 AM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury, Lake, Miner | 41 min |
| Jun 11, 5:41 AM CDT | Severe Thunderstorm Warning | FSD | Yankton | 34 min |
| Jun 11, 5:56 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Union | 49 min |
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.