Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Aberdeen, SD

June 11, 20215 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 11, 2021, 4:49 AM CDT for 5 counties in South Dakota. It was in force for 41 min. 1 report 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 11, 2021, 4:49 AM CDT (09:49 UTC)
Expired: Jun 11, 2021, 5:30 AM CDT
In force: 41 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clark County, SD, Codington County, SD, Grant County, SD, Hamlin County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 93 km from the middle of the area, began a volume at 09:50 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 11, 5:28 AM CDT	TSTM WND GST 58	1 Se Watertown, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 9.8 hours before the alert went out and 63 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

311 
WUUS53 KABR 110949
SVRABR
SDC025-029-051-057-115-111030-
/O.NEW.KABR.SV.W.0033.210611T0949Z-210611T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
449 AM CDT Fri Jun 11 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Northern Hamlin County in northeastern South Dakota...
  Central Grant County in northeastern South Dakota...
  Central Clark County in northeastern South Dakota...
  Southeastern Spink County in northeastern South Dakota...
  Codington County in northeastern South Dakota...

* Until 530 AM CDT.

* At 449 AM CDT, a severe thunderstorm was located near Raymond, or 7
  miles west of Clark, moving east at 70 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...
  Clark around 455 AM CDT.
  Hillcrest Colony around 500 AM CDT.
  Henry and Garden City around 505 AM CDT.

Other locations in the path of this severe thunderstorm include Long
Lake, Tinkertown, Florence, Medicine Lake, Memorial Park Camping
Site, Sandy Shore Rec Area, Lake Kampeska, Watertown, Dakota Sioux
Casino, Watertown City Park, Rauville and Waverly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4465 9805 4495 9810 4517 9695 4479 9690
TIME...MOT...LOC 0949Z 256DEG 60KT 4488 9788 

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

Wise

2 follow-up statements

517 
WWUS53 KABR 111004
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
504 AM CDT Fri Jun 11 2021

SDC115-111013-
/O.CAN.KABR.SV.W.0033.000000T0000Z-210611T1030Z/
Spink SD-
504 AM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SPINK COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northeastern South Dakota.

LAT...LON 4469 9780 4499 9785 4517 9695 4479 9690
TIME...MOT...LOC 1003Z 256DEG 60KT 4494 9754 

$$

SDC025-029-051-057-111030-
/O.CON.KABR.SV.W.0033.000000T0000Z-210611T1030Z/
Hamlin SD-Grant SD-Clark SD-Codington SD-
504 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM CDT
FOR NORTHERN HAMLIN...CENTRAL GRANT...NORTHEASTERN CLARK AND
CODINGTON COUNTIES...

At 503 AM CDT, a severe thunderstorm was located over Garden City, or
10 miles northeast of Clark, moving east at 70 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.

Locations impacted include...
  Medicine Lake, Tinkertown, Florence, Memorial Park Camping Site, 
  Sandy Shore Rec Area, Lake Kampeska, Watertown, Rauville, Dakota 
  Sioux Casino, Watertown City Park and Waverly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4469 9780 4499 9785 4517 9695 4479 9690
TIME...MOT...LOC 1003Z 256DEG 60KT 4494 9754 

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

Wise

517 
WWUS53 KABR 111030
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
530 AM CDT Fri Jun 11 2021

SDC025-029-051-057-111040-
/O.EXP.KABR.SV.W.0033.000000T0000Z-210611T1030Z/
Hamlin SD-Grant SD-Clark SD-Codington SD-
530 AM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HAMLIN...CENTRAL
GRANT...NORTHEASTERN CLARK AND CODINGTON 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 are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northeastern South Dakota.

LAT...LON 4469 9780 4499 9785 4517 9695 4479 9690
TIME...MOT...LOC 1030Z 256DEG 60KT 4504 9696 

$$

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 11:06 PM CDT	Severe Thunderstorm Warning	ABR	Corson	39 min
Jun 11, 1:02 AM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	43 min
Jun 11, 1:15 AM CDT	Severe Thunderstorm Warning	ABR	Dewey, Jones, Stanley	45 min
Jun 11, 1:47 AM CDT	Special Weather Statement	ABR	Walworth	43 min
Jun 11, 2:37 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, McPherson, Potter, Walworth	38 min
Jun 11, 2:54 AM CDT	Severe Thunderstorm Warning	ABR	Faulk, Potter, Sully	36 min
Jun 11, 3:16 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, Faulk, McPherson, Potter, Walworth	44 min
Jun 11, 3:23 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Spink	52 min
Jun 11, 3:38 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Edmunds, Faulk, McPherson, Marshall and 1 more	52 min
Jun 11, 4:16 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Clark, Codington, Day, Grant, Marshall and 2 more	44 min
Jun 11, 5:02 AM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day, Deuel, Grant, Marshall and 1 more	43 min
Jun 11, 5:35 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Deuel, Hamlin	40 min
Jun 11, 5:49 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Deuel, Grant, Roberts	33 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.