Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 80, NWS Aberdeen, SD

July 26, 2021Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 26, 2021, 3:05 AM MDT for Corson County, South Dakota. It was in force for 28 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
Jul 26, 2021, 3:05 AM MDT (09:05 UTC)
Expired
Jul 26, 2021, 3:33 AM MDT
In force
28 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
50.0 mph

County Corson County, SD

The radar

The Bismarck radar (KBIS), 99 km from the middle of the area, began a volume at 09:06 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 9.1 hours before the alert went out and 99 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2021-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 71 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2021-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
71 J/kg
Mixed-layer CIN
-190 J/kg
Mixed-layer LCL
3328 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

915 
WUUS53 KABR 260905
SVRABR
SDC031-260945-
/O.NEW.KABR.SV.W.0080.210726T0905Z-210726T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
305 AM MDT Mon Jul 26 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Northeastern Corson County in north central South Dakota...

* Until 345 AM MDT.

* At 304 AM MDT, a severe thunderstorm was located near Mclaughlin,
  moving southeast at 25 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Mclaughlin around 320 AM MDT.

Other locations in the path of this severe thunderstorm include
Mahto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10056 4594 10050 4569 10063 4582 10104
      4594 10098
TIME...MOT...LOC 0904Z 293DEG 21KT 4586 10092 

HAIL...1.25IN
WIND...<50MPH
 
$$

SD
3 follow-up statements
495 
WWUS53 KABR 260915
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
315 AM MDT Mon Jul 26 2021

SDC031-260945-
/O.CON.KABR.SV.W.0080.000000T0000Z-210726T0945Z/
Corson SD-
315 AM MDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM MDT
FOR NORTHEASTERN CORSON COUNTY...

At 315 AM MDT, a severe thunderstorm was located north of 
Mclaughlin, moving east at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
  Mahto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10056 4594 10050 4570 10062 4584 10095
      4594 10098
TIME...MOT...LOC 0915Z 285DEG 21KT 4586 10083 

HAIL...1.00IN
WIND...<50MPH
 
$$

SD
152 
WWUS53 KABR 260926
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
326 AM MDT Mon Jul 26 2021

SDC031-260945-
/O.CON.KABR.SV.W.0080.000000T0000Z-210726T0945Z/
Corson SD-
326 AM MDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM MDT
FOR NORTHEASTERN CORSON COUNTY...

At 325 AM MDT, a severe thunderstorm was located northeast of 
Mclaughlin, moving east at 25 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
northeastern Corson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10056 4594 10050 4575 10060 4588 10095
      4594 10098
TIME...MOT...LOC 0925Z 288DEG 21KT 4585 10074 

HAIL...1.00IN
WIND...60MPH
 
$$

SD
049 
WWUS53 KABR 260933
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
333 AM MDT Mon Jul 26 2021

SDC031-260943-
/O.CAN.KABR.SV.W.0080.000000T0000Z-210726T0945Z/
Corson SD-
333 AM MDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CORSON COUNTY IS
CANCELLED...
                
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 has been cancelled.  However small hail and
gusty winds are still possible with this thunderstorm.

LAT...LON 4595 10056 4594 10050 4575 10060 4588 10095
      4594 10098
TIME...MOT...LOC 0930Z 293DEG 21KT 4583 10068 

$$

SD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 6:03 PM MDTSevere Thunderstorm WarningABRHand, Hyde42 min
Jul 25, 6:30 PM MDTSevere Thunderstorm WarningABRHand36 min
Jul 25, 7:11 PM MDTSevere Thunderstorm WarningABRClark, Spink49 min
Jul 25, 7:54 PM MDTSevere Thunderstorm WarningABRClark, Codington51 min
Jul 26, 2:41 AM MDTHeat AdvisoryABRBrown, Buffalo, Campbell, Corson, Dewey, Edmunds and 12 more15 hr
Jul 26, 2:41 AM MDTHeat AdvisoryABRBrown, Buffalo, Campbell, Clark, Codington, Corson and 18 more41 hr
Jul 26, 3:00 AM MDTSpecial Weather StatementABRCorson30 min
Jul 26, 6:12 AM MDTSpecial Weather StatementABRDay18 min
Jul 26, 7:35 AM MDTSpecial Weather StatementABRWalworth25 min
Jul 26, 8:03 AM MDTSpecial Weather StatementABRWalworth27 min
Jul 26, 8:43 AM MDTSevere Thunderstorm WarningABRWalworth32 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021Every 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.