Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 106, NWS Sioux Falls, SD

August 26, 2021Beadle County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 26, 2021, 9:18 AM CDT for Beadle County, Kingsbury County, South Dakota. It was in force for 57 min. 2 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: Aug 26, 2021, 9:18 AM CDT (14:18 UTC)
Expired: Aug 26, 2021, 10:15 AM CDT
In force: 57 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Beadle County, SD, Kingsbury County, SD

The radar

The Aberdeen radar (KABR), 118 km from the middle of the area, began a volume at 14:19 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
Aug 26, 9:26 AM CDT	TSTM WND GST 56	9 Sse Spink Colony, SD	MESONET STATION 284 JCT SD28/SD37 (SDDOT).
Aug 26, 9:50 AM CDT	TSTM WND DMG	De Smet, SD	SPOTTER REPORTED DARK ROLL CLOUDS, SHORT LIVED STRONG WINDS. REPORTED TREES DOWN AND A SEMI ROLLED OVER OFF HWY 14, WEST OF TOWN. STILL INVESTIGATING IF THAT WAS WIND RELATED.

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
Aug 26, 9:05 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 2.3 hours before the alert went out and 65 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 365 m²/s²
0-3 km storm-relative helicity: 490 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted.

386 
WUUS53 KFSD 261418
SVRFSD
SDC005-077-261515-
/O.NEW.KFSD.SV.W.0106.210826T1418Z-210826T1515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
918 AM CDT Thu Aug 26 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Kingsbury County in east central South Dakota...
  Beadle County in east central South Dakota...

* Until 1015 AM CDT.

* At 918 AM CDT, severe thunderstorms were located along a line
  extending from near Bradley to near Clark to 12 miles northwest of
  Yale, moving east at 45 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Yale around 930 AM CDT.

Other locations in the path of these severe thunderstorms include De
Smet, Lake Preston, Badger and Hetland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4463 9786 4455 9785 4454 9713 4419 9713
      4420 9870 4464 9821
TIME...MOT...LOC 1418Z 280DEG 41KT 4505 9756 4480 9774 4457 9816 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kalin

2 follow-up statements

395 
WWUS53 KFSD 261422
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
922 AM CDT Thu Aug 26 2021

SDC005-077-261515-
/O.CON.KFSD.SV.W.0106.000000T0000Z-210826T1515Z/
Kingsbury SD-Beadle SD-
922 AM CDT Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT
FOR KINGSBURY AND BEADLE COUNTIES...

At 921 AM CDT, severe thunderstorms were located along a line
extending from near Wallace to near Clark to 12 miles northwest of
Yale, moving east at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Trained weather spotters. A gust to 73 mph was recorded in 
         Huron around 909 am. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Yale around 935 AM CDT.

Other locations in the path of these severe thunderstorms include De
Smet, Lake Preston, Badger and Hetland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4463 9786 4455 9785 4454 9713 4419 9713
      4420 9870 4464 9821
TIME...MOT...LOC 1421Z 280DEG 41KT 4505 9756 4480 9774 4457 9816 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kalin

903 
WWUS53 KFSD 261441
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
941 AM CDT Thu Aug 26 2021

SDC005-077-261515-
/O.CON.KFSD.SV.W.0106.000000T0000Z-210826T1515Z/
Kingsbury SD-Beadle SD-
941 AM CDT Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT
FOR KINGSBURY AND SOUTHEASTERN BEADLE COUNTIES...

At 940 AM CDT, severe thunderstorms were located along a line
extending from Medicine Lake to near Hazel to near Iroquois, moving
east at 55 mph.

HAZARD...70 mph wind gusts.

SOURCE...Trained weather spotters. A gust to 73 mph was recorded in 
         Huron around 914 am. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Lake Thompson State Recreation Area, Lake Preston and Oldham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4442 9833 4463 9787 4463 9786 4455 9785
      4454 9713 4419 9713 4420 9868
TIME...MOT...LOC 1440Z 291DEG 46KT 4497 9737 4473 9740 4435 9774 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kalin

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 4:58 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	27 min
Aug 26, 10:01 AM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Lake, Miner, Moody	59 min
Aug 26, 10:39 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Brookings	66 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.