Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Aberdeen, SD

May 23, 20216 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at May 23, 2021, 10:46 PM CDT for 6 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: May 23, 2021, 10:46 PM CDT (03:46 UTC)
Expired: May 23, 2021, 11:30 PM CDT
In force: 44 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Buffalo County, SD, Faulk County, SD, Hand County, SD, Hyde County, SD, Potter County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 03:48 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
May 23, 10:47 PM CDT	TSTM WND GST 60	17 W Polo, SD	MESONET STATION 215 JCT SD47/SD26 (SDDOT).
May 23, 11:02 PM CDT	TSTM WND DMG	Orient, SD	MULTIPLE GRAIN BINS KNOCKED OVER. RADAR ESTIMATED TIME.
May 23, 11:05 PM CDT	TSTM WND GST 71	4 W Faulkton, SD	RELAYED VIA SOCIAL MEDIA. OBSERVATION TAKEN FROM A PERSONAL WEATHER STATION.

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, 3.8 hours before the alert went out and 73 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: 407 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 2081 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

131 
WUUS53 KABR 240346
SVRABR
SDC017-049-059-069-107-119-240430-
/O.NEW.KABR.SV.W.0006.210524T0346Z-210524T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1046 PM CDT Sun May 23 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Hand County in central South Dakota...
  Northeastern Sully County in central South Dakota...
  Northern Hyde County in central South Dakota...
  Faulk County in north central South Dakota...
  Southeastern Potter County in north central South Dakota...
  Eastern Buffalo County in central South Dakota...

* Until 1130 PM CDT.

* At 1045 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles southeast of Lebanon to near Ree Heights to
  near Shelby, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated. This line of storms has a history of 
           producing severe wind gusts of 60 to 70 mph. 

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Ree Heights and Miller Dale Colony around 1050 PM CDT.
  Miller around 1055 PM CDT.
  St. Lawrence around 1100 PM CDT.
  Brentwood Colony, Burkmere and Vayland around 1105 PM CDT.

Other locations in the path of these severe thunderstorms include
Burdette and Norbeck.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4442 9928 4502 9979 4524 9906 4492 9872
      4420 9870 4419 9893 4394 9893 4393 9924
TIME...MOT...LOC 0345Z 244DEG 48KT 4501 9965 4447 9916 4400 9913 

HAIL...<.75IN
WIND...60MPH
 
$$

SRF

2 follow-up statements

377 
WWUS53 KABR 240357
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1057 PM CDT Sun May 23 2021

SDC017-049-059-069-107-119-240430-
/O.CON.KABR.SV.W.0006.000000T0000Z-210524T0430Z/
Hand SD-Sully SD-Hyde SD-Faulk SD-Potter SD-Buffalo SD-
1057 PM CDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR HAND...NORTHEASTERN SULLY...NORTHERN HYDE...FAULK...SOUTHEASTERN
POTTER AND EASTERN BUFFALO COUNTIES...

At 1055 PM CDT, severe thunderstorms were located along a line
extending from Seneca to Miller to Gann Valley, moving northeast at
55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters. At 1032 PM CDT, a 60 mph wind 
         gust was reported 17 miles west of Polo at the junction of 
         SD 47 and SD 26.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Miller and St. Lawrence around 1100 PM CDT.
  Brentwood Colony and Vayland around 1105 PM CDT.

Other locations in the path of these severe thunderstorms include
Burdette and Norbeck.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4442 9928 4502 9979 4524 9906 4492 9872
      4420 9870 4419 9893 4394 9893 4393 9924
TIME...MOT...LOC 0355Z 244DEG 48KT 4507 9949 4453 9900 4406 9897 

HAIL...<.75IN
WIND...60MPH
 
$$

SRF

871 
WWUS53 KABR 240411
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1111 PM CDT Sun May 23 2021

SDC107-119-240420-
/O.CAN.KABR.SV.W.0006.000000T0000Z-210524T0430Z/
Sully SD-Potter SD-
1111 PM CDT Sun May 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SULLY AND
SOUTHEASTERN POTTER COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4447 9909 4510 9950 4524 9906 4492 9872
      4420 9870 4419 9893 4394 9893 4394 9908
TIME...MOT...LOC 0410Z 244DEG 48KT 4515 9926 4461 9877 4414 9874 

$$

SDC017-049-059-069-240430-
/O.CON.KABR.SV.W.0006.000000T0000Z-210524T0430Z/
Hand SD-Hyde SD-Faulk SD-Buffalo SD-
1111 PM CDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR HAND...NORTHEASTERN HYDE...CENTRAL FAULK AND EASTERN BUFFALO
COUNTIES...

At 1110 PM CDT, severe thunderstorms were located along a line
extending from near Brentwood Colony to 6 miles south of Burdette to
9 miles northwest of Wessington Springs, moving northeast at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters. At 1032 PM CDT, a 60 mph wind 
         gust was reported 17 miles west of Polo at the junction of 
         SD 47 and SD 26.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Burdette around 1115 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4447 9909 4510 9950 4524 9906 4492 9872
      4420 9870 4419 9893 4394 9893 4394 9908
TIME...MOT...LOC 0410Z 244DEG 48KT 4515 9926 4461 9877 4414 9874 

HAIL...<.75IN
WIND...60MPH
 
$$

SRF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:59 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	46 min
May 23, 9:37 PM CDT	Special Weather Statement	ABR	Hughes	23 min
May 23, 10:04 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hughes, Lyman	41 min
May 23, 10:14 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Faulk, Hand, Hughes, Hyde, Lyman and 2 more	46 min
May 23, 11:06 PM CDT	Special Weather Statement	ABR	Edmunds, Walworth	24 min
May 23, 11:23 PM CDT	Special Weather Statement	ABR	Spink	37 min
May 23, 11:30 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, Faulk, McPherson, Walworth	45 min
May 24, 12:03 AM CDT	Special Weather Statement	ABR	Brown	42 min
May 24, 12:11 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, McPherson, Marshall, Spink	49 min
May 24, 12:14 AM CDT	Special Weather Statement	ABR	Clark, Day	46 min
May 24, 12:55 AM CDT	Special Weather Statement	ABR	Marshall	35 min
May 24, 1:00 AM CDT	Special Weather Statement	ABR	Codington, Deuel, Grant, Hamlin, Roberts	60 min
May 24, 1:17 AM CDT	Special Weather Statement	ABR	Roberts	43 min
May 24, 2:59 PM CDT	Wind Advisory	ABR	Brown, Campbell, Corson, Day, Dewey, Edmunds and 4 more	28 hr

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.