Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Sioux Falls, SD

June 23, 20214 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 23, 2021, 7:46 PM CDT for 4 counties in South Dakota. It was in force for 44 min. 3 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: Jun 23, 2021, 7:46 PM CDT (00:46 UTC)
Expired: Jun 23, 2021, 8:30 PM CDT
In force: 44 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Aurora County, SD, Davison County, SD, Douglas County, SD, Hutchinson County, SD

The radar

The Sioux Falls radar (KFSD), 120 km from the middle of the area, began a volume at 00:45 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
Jun 23, 8:12 PM CDT	HAIL 1	2 Sse Stickney, SD	ESTIMATED 50 MPH WINDS WITH THE QUARTER SIZE HAIL.
Jun 23, 8:23 PM CDT	HAIL 0.7	Stickney, SD
Jun 23, 8:23 PM CDT	HAIL 0.88	Stickney, SD	DIME TO NICKEL SIZE HAIL REPORTED.

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, 0.8 hours before the alert went out and 154 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 350 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 3369 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

484 
WUUS53 KFSD 240046
SVRFSD
SDC003-035-043-067-240130-
/O.NEW.KFSD.SV.W.0033.210624T0046Z-210624T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
746 PM CDT Wed Jun 23 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Southern Davison County in southeastern South Dakota...
  Southeastern Aurora County in south central South Dakota...
  Northeastern Douglas County in south central South Dakota...
  Northwestern Hutchinson County in southeastern South Dakota...

* Until 830 PM CDT.

* At 745 PM CDT, a severe thunderstorm was located 7 miles southeast
  of Stickney, or 15 miles southeast of Plankinton, moving east at 20
  mph.

  HAZARD...60 mph wind gusts and quarter 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...
  Ethan and Dimock around 830 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4360 9856 4362 9796 4350 9796 4350 9794
      4335 9796 4346 9857
TIME...MOT...LOC 0045Z 274DEG 16KT 4352 9833 

HAIL...1.00IN
WIND...60MPH
 
$$

Kalin

1 follow-up statement

264 
WWUS53 KFSD 240108
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
808 PM CDT Wed Jun 23 2021

SDC003-035-043-067-240130-
/O.CON.KFSD.SV.W.0033.000000T0000Z-210624T0130Z/
Davison SD-Aurora SD-Douglas SD-Hutchinson SD-
808 PM CDT Wed Jun 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHERN DAVISON...SOUTHEASTERN AURORA...NORTHEASTERN DOUGLAS AND
NORTHWESTERN HUTCHINSON COUNTIES...

At 807 PM CDT, a severe thunderstorm was located near Stickney, or 13
miles south of Plankinton, moving east at 20 mph.

HAZARD...60 mph wind gusts and quarter 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...
  Dimock around 845 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4360 9856 4362 9796 4350 9796 4350 9794
      4335 9796 4346 9857
TIME...MOT...LOC 0107Z 279DEG 19KT 4352 9842 

HAIL...1.00IN
WIND...60MPH
 
$$

Kalin

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 7:12 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	46 min
Jun 23, 8:05 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Douglas	40 min
Jun 23, 8:20 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Clay, Davison, Douglas, Hanson and 3 more	55 min
Jun 23, 8:36 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Douglas, Hutchinson	18 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021 Every 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.