Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS Aberdeen, SD

August 22, 2021Edmunds County, Faulk County, Potter County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 22, 2021, 4:19 PM CDT for Edmunds County, Faulk County, Potter County, South Dakota. It was in force for 41 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 22, 2021, 4:19 PM CDT (21:19 UTC)
Expired: Aug 22, 2021, 5:00 PM CDT
In force: 41 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Edmunds County, SD, Faulk County, SD, Potter County, SD

The radar

The Aberdeen radar (KABR), 86 km from the middle of the area, began a volume at 21:21 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, 4:33 PM CDT	TSTM WND DMG	5 Nne Roscoe, SD	DELAYED REPORT. SMALL OUTBUILDING DESTROYED BY WIND. RELAYED VIA SOCIAL MEDIA WITH PHOTO. ESTIMATED TIME.
Aug 22, 4:58 PM CDT	HAIL 1.75	5 Nne Loyalton, 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, 9.3 hours before the alert went out and 93 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.

030 
WUUS53 KABR 222119
SVRABR
SDC045-049-107-222200-
/O.NEW.KABR.SV.W.0097.210822T2119Z-210822T2200Z/

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

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Western Edmunds County in north central South Dakota...
  Northwestern Faulk County in north central South Dakota...
  Northeastern Potter County in north central South Dakota...

* Until 500 PM CDT.

* At 419 PM CDT, a severe thunderstorm was located over Tolstoy, or
  21 miles northeast of Gettysburg, 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...
  Onaka around 430 PM CDT.

Other locations in the path of this severe thunderstorm include
Loyalton and Roscoe.

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 4511 9964 4520 9971 4556 9932 4527 9908
TIME...MOT...LOC 2119Z 234DEG 29KT 4519 9959 

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

$$

Lueck

3 follow-up statements

419 
WWUS53 KABR 222136
SVSABR

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

SDC049-107-222145-
/O.CAN.KABR.SV.W.0097.000000T0000Z-210822T2200Z/
Faulk SD-Potter SD-
436 PM CDT Sun Aug 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FAULK AND
NORTHEASTERN POTTER COUNTIES 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 900 PM CDT for
north central South Dakota.

LAT...LON 4534 9914 4524 9943 4525 9953 4528 9956
      4553 9929
TIME...MOT...LOC 2135Z 231DEG 29KT 4529 9945 

$$

SDC045-222200-
/O.CON.KABR.SV.W.0097.000000T0000Z-210822T2200Z/
Edmunds SD-
436 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR WESTERN EDMUNDS COUNTY...

At 435 PM CDT, a severe thunderstorm was located 7 miles north of
Onaka, or 22 miles southwest of Ipswich, 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.

Locations impacted include...
  Roscoe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4534 9914 4524 9943 4525 9953 4528 9956
      4553 9929
TIME...MOT...LOC 2135Z 231DEG 29KT 4529 9945 

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

$$

Lueck

777 
WWUS53 KABR 222147
SVSABR

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

SDC045-222200-
/O.CON.KABR.SV.W.0097.000000T0000Z-210822T2200Z/
Edmunds SD-
447 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTH CENTRAL EDMUNDS COUNTY...

At 447 PM CDT, a severe thunderstorm was located near Loyalton, or 19
miles southwest of Ipswich, moving northeast at 30 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 south
central Edmunds County.

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 4534 9914 4526 9942 4531 9944 4548 9925
TIME...MOT...LOC 2147Z 234DEG 27KT 4532 9938 

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

$$

Lueck

478 
WWUS53 KABR 222158
SVSABR

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

SDC045-222207-
/O.EXP.KABR.SV.W.0097.000000T0000Z-210822T2200Z/
Edmunds SD-
458 PM CDT Sun Aug 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL EDMUNDS COUNTY
WILL EXPIRE AT 500 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

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

LAT...LON 4534 9914 4526 9942 4531 9944 4548 9925
TIME...MOT...LOC 2157Z 234DEG 29KT 4536 9930 

$$

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, 4:33 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, 6:54 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.