Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Aberdeen, SD

July 23, 20215 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 23, 2021, 10:54 PM CDT for 5 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: Jul 23, 2021, 10:54 PM CDT (03:54 UTC)
Expired: Jul 23, 2021, 11:45 PM CDT
In force: 51 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Edmunds County, SD, Faulk County, SD, Potter County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 116 km from the middle of the area, began a volume at 03:58 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
Jul 23, 7:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.9 hours before the alert went out and 110 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: 3002 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1613 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

As transmitted.

468 
WUUS53 KABR 240354
SVRABR
SDC045-049-107-119-129-240445-
/O.NEW.KABR.SV.W.0064.210724T0354Z-210724T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1054 PM CDT Fri Jul 23 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Southwestern Edmunds County in north central South Dakota...
  Northeastern Sully County in central South Dakota...
  Western Faulk County in north central South Dakota...
  Potter County in north central South Dakota...
  Southeastern Walworth County in north central South Dakota...

* Until 1145 PM CDT.

* At 1053 PM CDT, severe thunderstorms were located along a line
  extending from near Hoven to near Whitlocks Bay Rec Area, moving
  southeast at 55 mph.

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

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Hoven around 1100 PM CDT.
  Gettysburg, Tolstoy and Gorman around 1105 PM CDT.
  Onaka around 1110 PM CDT.

Other locations in the path of these severe thunderstorms include
Seneca, Brentwood Colony, Burkmere, Stone Lake and Faulkton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4504 9900 4489 9935 4490 9967 4476 9967
      4471 9978 4510 10032 4516 10028 4523 10026
      4532 10031 4549 9995
TIME...MOT...LOC 0353Z 307DEG 49KT 4532 9977 4512 10018 

HAIL...0.75IN
WIND...60MPH
 
$$

Lueck

3 follow-up statements

826 
WWUS53 KABR 240421
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1121 PM CDT Fri Jul 23 2021

SDC119-240430-
/O.CAN.KABR.SV.W.0064.000000T0000Z-210724T0445Z/
Sully SD-
1121 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SULLY COUNTY IS
CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
north central South Dakota.

LAT...LON 4504 9900 4489 9934 4490 9996 4510 10032
      4520 10024 4541 9977
TIME...MOT...LOC 0420Z 303DEG 42KT 4519 9947 4499 9988 

$$

SDC045-049-107-129-240445-
/O.CON.KABR.SV.W.0064.000000T0000Z-210724T0445Z/
Edmunds SD-Faulk SD-Potter SD-Walworth SD-
1121 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR SOUTHWESTERN EDMUNDS...WESTERN FAULK...POTTER AND SOUTHEASTERN
WALWORTH COUNTIES...

At 1120 PM CDT, severe thunderstorms were located along a line
extending from Onaka to near Gettysburg, moving southeast at 50 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Onaka, Brentwood Colony, Burkmere and Faulkton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4504 9900 4489 9934 4490 9996 4510 10032
      4520 10024 4541 9977
TIME...MOT...LOC 0420Z 303DEG 42KT 4519 9947 4499 9988 

HAIL...0.75IN
WIND...60MPH
 
$$

Lueck

070 
WWUS53 KABR 240433
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1133 PM CDT Fri Jul 23 2021

SDC129-240442-
/O.CAN.KABR.SV.W.0064.000000T0000Z-210724T0445Z/
Walworth SD-
1133 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WALWORTH COUNTY
IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
north central South Dakota.

LAT...LON 4504 9900 4489 9933 4490 9983 4501 9968
      4514 9987 4525 9975 4525 9971 4528 9971
      4535 9964
TIME...MOT...LOC 0432Z 307DEG 49KT 4510 9930 4490 9971 

$$

SDC045-049-107-240445-
/O.CON.KABR.SV.W.0064.000000T0000Z-210724T0445Z/
Edmunds SD-Faulk SD-Potter SD-
1133 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR SOUTHWESTERN EDMUNDS...WESTERN FAULK AND EASTERN POTTER
COUNTIES...

At 1132 PM CDT, severe thunderstorms were located along a line
extending from near Brentwood Colony to near Stone Lake, moving
southeast at 55 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Faulkton, Lebanon, Seneca, Tolstoy, Onaka, Burkmere and Brentwood
Colony.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4504 9900 4489 9933 4490 9983 4501 9968
      4514 9987 4525 9975 4525 9971 4528 9971
      4535 9964
TIME...MOT...LOC 0432Z 307DEG 49KT 4510 9930 4490 9971 

HAIL...0.75IN
WIND...60MPH
 
$$

Lueck

854 
WWUS53 KABR 240441
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1141 PM CDT Fri Jul 23 2021

SDC045-049-107-240450-
/O.EXP.KABR.SV.W.0064.000000T0000Z-210724T0445Z/
Edmunds SD-Faulk SD-Potter SD-
1141 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN EDMUNDS...WESTERN
FAULK AND EASTERN POTTER COUNTIES WILL EXPIRE AT 1145 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
north central South Dakota.

LAT...LON 4504 9900 4489 9933 4490 9983 4501 9968
      4514 9987 4525 9975 4525 9971 4528 9971
      4535 9964
TIME...MOT...LOC 0440Z 307DEG 49KT 4504 9920 4484 9961 

$$

Lueck

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:14 PM CDT	Severe Thunderstorm Warning	ABR	Corson	46 min
Jul 23, 8:42 PM CDT	Special Weather Statement	ABR	Corson	33 min
Jul 23, 9:27 PM CDT	Special Weather Statement	ABR	Marshall	33 min
Jul 23, 9:47 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson	43 min
Jul 23, 10:06 PM CDT	Special Weather Statement	ABR	Walworth	24 min
Jul 23, 10:29 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	46 min
Jul 23, 10:31 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	44 min
Jul 23, 10:40 PM CDT	Special Weather Statement	ABR	Potter, Walworth	50 min
Jul 23, 10:42 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall, Roberts	33 min
Jul 23, 11:13 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	35 min
Jul 23, 11:17 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Marshall	30 min
Jul 23, 11:54 PM CDT	Special Weather Statement	ABR	Marshall	36 min
Jul 24, 12:43 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	47 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.