Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Sioux Falls, SD

June 23, 20214 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 23, 2021, 8:36 PM CDT for 4 counties in South Dakota. It was in force for 18 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 23, 2021, 8:36 PM CDT (01:36 UTC)
Expired: Jun 23, 2021, 8:54 PM CDT
In force: 18 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), 121 km from the middle of the area, began a volume at 01:37 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.6 hours before the alert went out and 147 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.

687 
WUUS53 KFSD 240136
SVRFSD
SDC003-035-043-067-240215-
/O.NEW.KFSD.SV.W.0036.210624T0136Z-210624T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
836 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 915 PM CDT.

* At 835 PM CDT, a severe thunderstorm was located near Stickney, or
  12 miles southeast of Plankinton, moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Trained weather spotters. Quarter size hail was reported 
           south of Stickney. 

  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 915 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4368 9840 4365 9797 4339 9796 4351 9845
TIME...MOT...LOC 0135Z 281DEG 22KT 4358 9832 

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

Kalin

1 follow-up statement

464 
WWUS53 KFSD 240154
SVSFSD

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

SDC003-035-043-067-240203-
/O.CAN.KFSD.SV.W.0036.000000T0000Z-210624T0215Z/
Davison SD-Aurora SD-Douglas SD-Hutchinson SD-
854 PM CDT Wed Jun 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DAVISON...
SOUTHEASTERN AURORA...NORTHEASTERN DOUGLAS AND NORTHWESTERN
HUTCHINSON COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 4368 9840 4365 9797 4339 9796 4351 9845
TIME...MOT...LOC 0152Z 281DEG 22KT 4356 9817 

$$

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, 7:46 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Douglas, Hutchinson	44 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

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.