Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 96, NWS Aberdeen, SD

August 19, 2021Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 19, 2021, 7:26 PM MDT for Corson County, South Dakota. It was in force for 34 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 19, 2021, 7:26 PM MDT (01:26 UTC)
Expired
Aug 19, 2021, 8:00 PM MDT
In force
34 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Corson County, SD

The radar

The Bismarck radar (KBIS), 112 km from the middle of the area, began a volume at 01:28 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

TimeReportWhereRemark
Aug 19, 7:30 PM MDTTSTM WND GST 5610 S Bullhead, SDGRAND RIVER RAWS. TIME ESTIMATED.
Aug 19, 7:46 PM MDTTSTM WND GST 605 Nne Bullhead, SDWIND BLEW TREE LIMB DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.4 hours before the alert went out and 113 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 2021-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2021-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1703 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

926 
WUUS53 KABR 200126
SVRABR
SDC031-200200-
/O.NEW.KABR.SV.W.0096.210820T0126Z-210820T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
726 PM MDT Thu Aug 19 2021

The National Weather Service in Aberdeen has issued a

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

* Until 800 PM MDT.

* At 726 PM MDT, a severe thunderstorm was located 10 miles southeast
  of Klein Ranch, or 22 miles southwest of Mclaughlin, moving north
  at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Bullhead around 740 PM MDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10103 4594 10097 4549 10096 4549 10135
      4594 10136
TIME...MOT...LOC 0126Z 180DEG 39KT 4559 10117 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TDK
2 follow-up statements
755 
WWUS53 KABR 200148
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
748 PM MDT Thu Aug 19 2021

SDC031-200200-
/O.CON.KABR.SV.W.0096.000000T0000Z-210820T0200Z/
Corson SD-
748 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR NORTH CENTRAL CORSON COUNTY...

At 748 PM MDT, a severe thunderstorm was located near Bullhead, or 17
miles west of Mclaughlin, moving north at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Walker.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10103 4594 10097 4573 10097 4572 10136
      4594 10136
TIME...MOT...LOC 0148Z 180DEG 39KT 4583 10117 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TDK
381 
WWUS53 KABR 200157
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
757 PM MDT Thu Aug 19 2021

SDC031-200207-
/O.EXP.KABR.SV.W.0096.000000T0000Z-210820T0200Z/
Corson SD-
757 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CORSON COUNTY
WILL EXPIRE AT 800 PM MDT...
                
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, gusty 
winds are still possible with this thunderstorm.

LAT...LON 4595 10103 4594 10097 4573 10097 4572 10136
      4594 10136
TIME...MOT...LOC 0157Z 180DEG 39KT 4590 10117 

$$

TDK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 6:29 PM MDTSpecial Weather StatementABRCorson, Dewey61 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.