Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Sioux Falls, SD

August 22, 2021Brule County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 22, 2021, 5:15 PM CDT for Brule County, South Dakota. It was in force for 45 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: Aug 22, 2021, 5:15 PM CDT (22:15 UTC)
Expired: Aug 22, 2021, 6:00 PM CDT
In force: 45 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Brule County, SD

The radar

The Aberdeen radar (KABR), 191 km from the middle of the area, began a volume at 22:17 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
Aug 22, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.3 hours before the alert went out and 136 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: 1388 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

244 
WUUS53 KFSD 222215
SVRFSD
SDC015-222300-
/O.NEW.KFSD.SV.W.0091.210822T2215Z-210822T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
515 PM CDT Sun Aug 22 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Northern Brule County in south central South Dakota...

* Until 600 PM CDT.

* At 515 PM CDT, a severe thunderstorm was located near Oacoma, or
  near Chamberlain, moving east at 45 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  northern Brule County, including the following locations...
  Pukwana.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4380 9936 4386 9931 4387 9931 4390 9936
      4393 9935 4393 9881 4382 9880 4374 9940
      4377 9942
TIME...MOT...LOC 2215Z 249DEG 38KT 4386 9936 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Schumacher

1 follow-up statement

246 
WWUS53 KFSD 222237
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
537 PM CDT Sun Aug 22 2021

SDC015-222300-
/O.CON.KFSD.SV.W.0091.000000T0000Z-210822T2300Z/
Brule SD-
537 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHERN BRULE COUNTY...

At 537 PM CDT, a severe thunderstorm was located near Shelby, or 14
miles north of Kimball, moving east at 45 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...
Chamberlain and Pukwana. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4390 9928 4393 9924 4393 9881 4382 9880
      4377 9934 4383 9933 4386 9931 4387 9931
TIME...MOT...LOC 2237Z 249DEG 38KT 4395 9905 

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

$$

Schumacher

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 5:48 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	42 min
Aug 22, 6:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Jerauld	40 min
Aug 22, 6:47 PM CDT	Tornado Warning	FSD	Aurora, Davison, Sanborn	32 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.