Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS Aberdeen, SD

August 22, 2021Brown County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 22, 2021, 6:11 PM CDT for Brown County, South Dakota. It was in force for 49 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: Aug 22, 2021, 6:11 PM CDT (23:11 UTC)
Expired: Aug 22, 2021, 7:00 PM CDT
In force: 49 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

County Brown County, SD

The radar

The Aberdeen radar (KABR), 12 km from the middle of the area, began a volume at 23:12 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 22, 6:24 PM CDT	HAIL 1.25	Warner, SD

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 22, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.2 hours before the alert went out and 50 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.

319 
WUUS53 KABR 222311
SVRABR
SDC013-230000-
/O.NEW.KABR.SV.W.0103.210822T2311Z-210823T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
611 PM CDT Sun Aug 22 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Southern Brown County in northeastern South Dakota...

* Until 700 PM CDT.

* At 611 PM CDT, a severe thunderstorm was located near North
  Scatterwood Lake, or 14 miles southwest of Aberdeen, moving east at
  35 mph.

  HAZARD...60 mph wind gusts and half dollar 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...
  Mansfield around 615 PM CDT.
  Warner around 625 PM CDT.
  Aberdeen around 630 PM CDT.

Other locations in the path of this severe thunderstorm include Bath
and Stratford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4553 9820 4528 9808 4524 9852 4524 9872
      4525 9873 4538 9872
TIME...MOT...LOC 2311Z 248DEG 32KT 4530 9866 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lueck

2 follow-up statements

701 
WWUS53 KABR 222324
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
624 PM CDT Sun Aug 22 2021

SDC013-230000-
/O.CON.KABR.SV.W.0103.000000T0000Z-210823T0000Z/
Brown SD-
624 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHERN BROWN COUNTY...

At 623 PM CDT, a severe thunderstorm was located over Warner, or 8
miles south of Aberdeen, moving east at 35 mph.

HAZARD...Golf 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 storm will be near...
  Aberdeen around 630 PM CDT.

Other locations in the path of this severe thunderstorm include Bath
and Stratford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4528 9808 4524 9852 4524 9856 4538 9860
      4552 9819
TIME...MOT...LOC 2323Z 248DEG 32KT 4534 9851 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lueck

824 
WWUS53 KABR 222339
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
639 PM CDT Sun Aug 22 2021

SDC013-230000-
/O.CON.KABR.SV.W.0103.000000T0000Z-210823T0000Z/
Brown SD-
639 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHEASTERN BROWN COUNTY...

At 638 PM CDT, a severe thunderstorm was located over Stratford, or
12 miles southwest of Groton, moving east at 35 mph.

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

SOURCE...Trained weather spotters.

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
southeastern Brown County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4525 9840 4535 9843 4546 9816 4528 9808
TIME...MOT...LOC 2338Z 255DEG 32KT 4533 9829 

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

$$

Lueck

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 8:02 AM CDT	Special Weather Statement	ABR	Jones	43 min
Aug 22, 3:40 PM CDT	Special Weather Statement	ABR	Deuel	20 min
Aug 22, 4:19 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter	41 min
Aug 22, 4:33 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Edmunds, McPherson	42 min
Aug 22, 5:03 PM CDT	Severe Thunderstorm Warning	ABR	McPherson	13 min
Aug 22, 5:21 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	39 min
Aug 22, 5:25 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo	37 min
Aug 22, 5:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Brown	50 min
Aug 22, 5:50 PM CDT	Special Weather Statement	ABR	Edmunds	25 min
Aug 22, 6:14 PM CDT	Severe Thunderstorm Warning Destructive damage threat	ABR	Day, Marshall	46 min
Aug 22, 6:27 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	48 min
Aug 22, 6:54 PM CDT	Tornado Warning	ABR	Spink	15 min
Aug 22, 6:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Day, Marshall, Roberts	24 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.