Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 61, NWS Aberdeen, SD

July 23, 2021Brown County, Edmunds County, McPherson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 23, 2021, 10:29 PM CDT for Brown County, Edmunds County, McPherson County, South Dakota. It was in force for 46 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: Jul 23, 2021, 10:29 PM CDT (03:29 UTC)
Expired: Jul 23, 2021, 11:15 PM CDT
In force: 46 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Brown County, SD, Edmunds County, SD, McPherson County, SD

The radar

The Aberdeen radar (KABR), 51 km from the middle of the area, began a volume at 03:33 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
Jul 23, 11:06 PM CDT	TSTM WND DMG	5 Nne Aberdeen, SD	SEVERAL LARGE TREE BRANCHES DOWN AND LARGE FLAG POLE TIPPED OVER. VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.

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
Jul 23, 7:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.5 hours before the alert went out and 91 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.

089 
WUUS53 KABR 240329
SVRABR
SDC013-045-089-240415-
/O.NEW.KABR.SV.W.0061.210724T0329Z-210724T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1029 PM CDT Fri Jul 23 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Edmunds County in north central South Dakota...
  Southern Brown County in northeastern South Dakota...
  Southern McPherson County in north central South Dakota...

* Until 1115 PM CDT.

* At 1029 PM CDT, severe thunderstorms were located along a line
  extending from near Leola to near Plainview Colony to near Hosmer,
  moving east at 45 mph.

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

  SOURCE...Trained weather spotters.

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

* Severe thunderstorms will be near...
  Leola, Deerfield Colony and Plainview Colony around 1035 PM CDT.
  Long Lake Colony and Grassland Colony around 1040 PM CDT.
  Wetonka around 1045 PM CDT.

Other locations in the path of these severe thunderstorms include
Mina Lake Rec Area, Westport, Richmond Lake Rec Area, Ipswich,
Aberdeen, Columbia, Cravens Corner, Pembrook Colony, Bath, Putney,
Mina and Tacoma Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 4560 9808 4545 9825 4527 9894 4553 9971
      4559 9971 4559 9972 4569 9972 4584 9925
TIME...MOT...LOC 0329Z 287DEG 39KT 4576 9885 4564 9901 4554 9948 

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

Lueck

2 follow-up statements

672 
WWUS53 KABR 240357
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1057 PM CDT Fri Jul 23 2021

SDC013-045-089-240415-
/O.CON.KABR.SV.W.0061.000000T0000Z-210724T0415Z/
Edmunds SD-Brown SD-McPherson SD-
1057 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR CENTRAL EDMUNDS...SOUTHERN BROWN AND SOUTHEASTERN MCPHERSON
COUNTIES...

At 1057 PM CDT, severe thunderstorms were located along a line
extending from near Westport to Richmond Lake Rec Area to near
Ipswich, moving east at 45 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Westport, Richmond Lake Rec Area, Columbia, Aberdeen, Bath, 
  Putney, Mina and Tacoma Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4560 9808 4545 9825 4527 9894 4551 9965
      4578 9898
TIME...MOT...LOC 0357Z 287DEG 39KT 4567 9845 4555 9861 4546 9908 

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

Lueck

216 
WWUS53 KABR 240409
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1109 PM CDT Fri Jul 23 2021

SDC013-045-089-240418-
/O.EXP.KABR.SV.W.0061.000000T0000Z-210724T0415Z/
Edmunds SD-Brown SD-McPherson SD-
1109 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL EDMUNDS...SOUTHERN
BROWN AND SOUTHEASTERN MCPHERSON COUNTIES WILL EXPIRE AT 1115 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 and northeastern South Dakota.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of northern Brown County until 1115 pm.

LAT...LON 4560 9808 4545 9825 4527 9894 4551 9965
      4578 9898
TIME...MOT...LOC 0408Z 287DEG 39KT 4564 9831 4552 9847 4543 9894 

$$

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, 10:31 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, 10:54 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Sully, Walworth	51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.