Alert archive / South Dakota / Tornado Warnings in 2021

Tornado Warning 4, NWS Aberdeen, SD

August 22, 2021Spink County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Aug 22, 2021, 6:54 PM CDT for Spink County, South Dakota. It was in force for 15 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, 6:54 PM CDT (23:54 UTC)
Expired: Aug 22, 2021, 7:09 PM CDT
In force: 15 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

County Spink County, SD

The radar

The Aberdeen radar (KABR), 36 km from the middle of the area, began a volume at 23:55 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, 7:05 PM CDT	FUNNEL CLOUD	5 W Conde, 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, 11.9 hours before the alert went out and 33 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.

090 
WFUS53 KABR 222354
TORABR
SDC115-230030-
/O.NEW.KABR.TO.W.0004.210822T2354Z-210823T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
654 PM CDT Sun Aug 22 2021

The National Weather Service in Aberdeen has issued a

* Tornado Warning for...
  Northeastern Spink County in northeastern South Dakota...

* Until 730 PM CDT.
    
* At 654 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Brentford, or 20 miles south of Aberdeen, moving
  east at 25 mph.

  HAZARD...Tornado and hail up to two inches in diameter.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Conde.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4507 9808 4515 9840 4522 9837 4524 9825
      4524 9805
TIME...MOT...LOC 2354Z 283DEG 24KT 4518 9833 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.00 IN

$$

Lueck

1 follow-up statement

882 
WWUS53 KABR 230009
SVSABR

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

SDC115-230018-
/O.CAN.KABR.TO.W.0004.000000T0000Z-210823T0030Z/
Spink SD-
709 PM CDT Sun Aug 22 2021

...THE TORNADO WARNING FOR NORTHEASTERN SPINK COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However small hail and
gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
northeastern South Dakota.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of northern Spink and southern Brown Counties.

LAT...LON 4507 9808 4515 9840 4522 9837 4524 9825
      4524 9805
TIME...MOT...LOC 0007Z 283DEG 24KT 4516 9820 

$$

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, 6:11 PM CDT	Severe Thunderstorm Warning	ABR	Brown	49 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, 6:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Day, Marshall, Roberts	24 min

Nearby

Tornado Warnings in South Dakota, 2021 Every tornado warning in 2021 Tornadoes 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.