Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 47, NWS Sioux Falls, SD

July 8, 20214 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 8, 2021, 10:53 PM CDT for 4 counties in South Dakota. It was in force for 52 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
Jul 8, 2021, 10:53 PM CDT (03:53 UTC)
Expired
Jul 8, 2021, 11:45 PM CDT
In force
52 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Bon Homme County, SD, Hutchinson County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 97 km from the middle of the area, began a volume at 03:53 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
Jul 8, 10:55 PM CDTHAIL 14 S Parkston, SDSOCIAL MEDIA REPORT OF QUARTER SIZE HAIL ALONG WITH 0.25 INCHES OF RAIN.
Jul 8, 11:29 PM CDTHAIL 1.252 Sse Freeman, SDHEAVY RAIN AND HAIL UP TO SIZE OF HALF DOLLARS.

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.

IssuedProductOfficeLasted
Jul 8, 9:33 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.9 hours before the alert went out and 189 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, Aberdeen, SD at 00:00Z on 2021-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 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, Aberdeen, SD at 00:00Z on 2021-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
82 J/kg
Mixed-layer CIN
-125 J/kg
Mixed-layer LCL
996 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

977 
WUUS53 KFSD 090353
SVRFSD
SDC009-067-125-135-090445-
/O.NEW.KFSD.SV.W.0047.210709T0353Z-210709T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1053 PM CDT Thu Jul 8 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bon Homme County in southeastern South Dakota...
  Northwestern Yankton County in southeastern South Dakota...
  West central Turner County in southeastern South Dakota...
  Hutchinson County in southeastern South Dakota...

* Until 1145 PM CDT.

* At 1052 PM CDT, a severe thunderstorm was located near Parkston,
  moving east at 40 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...
  Kaylor around 1110 PM CDT.
  Scotland around 1120 PM CDT.
  Menno around 1125 PM CDT.

Other locations impacted by this severe thunderstorm include
Lesterville and Olivet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4321 9811 4343 9803 4344 9792 4331 9728
      4291 9758
TIME...MOT...LOC 0352Z 290DEG 34KT 4331 9800 

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

APT
3 follow-up statements
483 
WWUS53 KFSD 090414
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
1114 PM CDT Thu Jul 8 2021

SDC009-067-125-135-090445-
/O.CON.KFSD.SV.W.0047.000000T0000Z-210709T0445Z/
Bon Homme SD-Yankton SD-Turner SD-Hutchinson SD-
1114 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR NORTHEASTERN BON HOMME...NORTHWESTERN YANKTON...WEST CENTRAL
TURNER AND SOUTHEASTERN HUTCHINSON COUNTIES...

At 1114 PM CDT, a severe thunderstorm was located near Menno, or 17
miles southeast of Parkston, moving east at 45 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 storm will be near...
  Menno around 1120 PM CDT.

Other locations impacted by this severe thunderstorm include
Lesterville and Olivet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4314 9794 4333 9786 4341 9778 4331 9728
      4291 9758
TIME...MOT...LOC 0414Z 291DEG 38KT 4327 9769 

HAIL...1.25IN
WIND...60MPH
 
$$

APT
467 
WWUS53 KFSD 090423
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
1123 PM CDT Thu Jul 8 2021

SDC009-067-125-135-090445-
/O.CON.KFSD.SV.W.0047.000000T0000Z-210709T0445Z/
Bon Homme SD-Yankton SD-Turner SD-Hutchinson SD-
1123 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR NORTHEASTERN BON HOMME...NORTHWESTERN YANKTON...WEST CENTRAL
TURNER AND SOUTHEASTERN HUTCHINSON COUNTIES...

At 1123 PM CDT, a severe thunderstorm was located over Menno, or 22
miles northeast of Tyndall, moving east at 40 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 remain over mainly rural areas of
northeastern Bon Homme, northwestern Yankton, west central Turner and
southeastern Hutchinson Counties, including the following
locations... Lesterville and Olivet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4307 9783 4322 9771 4338 9764 4331 9728
      4291 9758
TIME...MOT...LOC 0423Z 290DEG 34KT 4324 9758 

HAIL...1.25IN
WIND...60MPH
 
$$

APT
682 
WWUS53 KFSD 090434
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
1134 PM CDT Thu Jul 8 2021

SDC067-125-090443-
/O.CAN.KFSD.SV.W.0047.000000T0000Z-210709T0445Z/
Turner SD-Hutchinson SD-
1134 PM CDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL TURNER AND
SOUTHEASTERN HUTCHINSON 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 300 AM CDT for
southeastern South Dakota.

LAT...LON 4304 9775 4311 9769 4311 9759 4308 9745
      4291 9758
TIME...MOT...LOC 0433Z 300DEG 39KT 4302 9761 

$$

SDC009-135-090445-
/O.CON.KFSD.SV.W.0047.000000T0000Z-210709T0445Z/
Bon Homme SD-Yankton SD-
1134 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR EAST CENTRAL BON HOMME AND NORTHWESTERN YANKTON COUNTIES...

At 1133 PM CDT, a severe thunderstorm was located near Tabor, or 11
miles north of Lewis And Clark State Recreation Area, moving
southeast at 45 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...
Lesterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4304 9775 4311 9769 4311 9759 4308 9745
      4291 9758
TIME...MOT...LOC 0433Z 300DEG 39KT 4302 9761 

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

APT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 10:56 PM CDTSevere Thunderstorm WarningFSDYankton19 min
Jul 8, 11:11 PM CDTSevere Thunderstorm WarningFSDClay, Yankton34 min
Jul 8, 11:21 PM CDTSevere Thunderstorm WarningFSDClay, Hutchinson, Lincoln, Turner, Yankton39 min
Jul 8, 11:50 PM CDTSevere Thunderstorm WarningFSDClay, Union40 min
Jul 8, 11:59 PM CDTSevere Thunderstorm WarningFSDClay, Lincoln, Turner, Union46 min
Jul 9, 12:44 AM CDTSevere Thunderstorm WarningFSDClay, Union46 min
Jul 9, 12:46 AM CDTSevere Thunderstorm WarningFSDLincoln, Union44 min
Jul 9, 1:22 AM CDTSevere Thunderstorm WarningFSDAurora, Davison, Jerauld, Sanborn38 min
Jul 9, 2:15 AM CDTSevere Thunderstorm WarningFSDLincoln, Union45 min
Jul 9, 2:34 AM CDTSevere Thunderstorm WarningFSDHanson, Lake, McCook, Miner41 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.