Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 169, NWS Sioux Falls, SD

October 9, 2021Beadle County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Oct 9, 2021, 5:08 PM CDT for Beadle County, Kingsbury County, South Dakota. It was in force for 52 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: Oct 9, 2021, 5:08 PM CDT (22:08 UTC)
Expired: Oct 9, 2021, 6:00 PM CDT
In force: 52 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Beadle County, SD, Kingsbury County, SD

The radar

The Aberdeen radar (KABR), 120 km from the middle of the area, began a volume at 22:06 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
Oct 9, 2:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.1 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: 4 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

397 
WUUS53 KFSD 092208
SVRFSD
SDC005-077-092300-
/O.NEW.KFSD.SV.W.0169.211009T2208Z-211009T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
508 PM CDT Sat Oct 9 2021

The National Weather Service in Sioux Falls has issued a

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

* Until 600 PM CDT.

* At 507 PM CDT, a severe thunderstorm was located near Cavour, or 10
  miles east of Huron, moving northeast at 35 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...
  Iroquois and Yale around 520 PM CDT.

Other locations impacted by this severe thunderstorm include
Bancroft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4455 9785 4454 9744 4420 9781 4419 9797
      4422 9823 4463 9819 4463 9786
TIME...MOT...LOC 2207Z 220DEG 32KT 4433 9801 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SG

2 follow-up statements

477 
WWUS53 KFSD 092224
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
524 PM CDT Sat Oct 9 2021

SDC005-077-092300-
/O.CON.KFSD.SV.W.0169.000000T0000Z-211009T2300Z/
Kingsbury SD-Beadle SD-
524 PM CDT Sat Oct 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR WESTERN KINGSBURY AND NORTHEASTERN BEADLE COUNTIES...

At 524 PM CDT, a severe thunderstorm was located near Yale, or 17
miles east of Huron, moving northeast at 35 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 remain over mainly rural areas of
western Kingsbury and northeastern Beadle Counties, including the
following locations... Bancroft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4455 9785 4454 9744 4420 9781 4438 9808
      4463 9808 4463 9786
TIME...MOT...LOC 2224Z 219DEG 32KT 4444 9788 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SG

391 
WWUS53 KFSD 092239
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
539 PM CDT Sat Oct 9 2021

SDC005-092248-
/O.CAN.KFSD.SV.W.0169.000000T0000Z-211009T2300Z/
Beadle SD-
539 PM CDT Sat Oct 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BEADLE 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 1000 PM CDT for
east central South Dakota.

LAT...LON 4454 9744 4420 9781 4421 9782 4454 9785
TIME...MOT...LOC 2238Z 218DEG 36KT 4444 9765 

$$

SDC077-092300-
/O.CON.KFSD.SV.W.0169.000000T0000Z-211009T2300Z/
Kingsbury SD-
539 PM CDT Sat Oct 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR WESTERN KINGSBURY COUNTY...

At 538 PM CDT, a severe thunderstorm was located near De Smet, or 12
miles northwest of Lake Thompson State Recreation Area, moving
northeast at 40 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...
Bancroft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4454 9744 4420 9781 4421 9782 4454 9785
TIME...MOT...LOC 2238Z 218DEG 36KT 4444 9765 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SG

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 3:39 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Beadle, Brule, Jerauld	51 min
Oct 9, 3:56 PM CDT	Tornado Warning	FSD	Aurora, Jerauld	34 min
Oct 9, 4:23 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld, Kingsbury, Sanborn	52 min
Oct 9, 5:53 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury	27 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.