Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Sioux Falls, SD

July 6, 2021Clay County, Turner County, Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 6, 2021, 12:54 PM CDT for Clay County, Turner County, Yankton County, South Dakota. It was in force for 51 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 6, 2021, 12:54 PM CDT (17:54 UTC)
Expired
Jul 6, 2021, 1:45 PM CDT
In force
51 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Clay County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 72 km from the middle of the area, began a volume at 17:54 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 6, 12:56 PM CDTTSTM WND GST 522 Ne Yankton, SDAWOS STATION KYKN YANKTON MUNICIPAL AIRPORT.
Jul 6, 12:56 PM CDTTSTM WND GST 602 Ne Yankton, SDCORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 NE YANKTON. AWOS STATION KYKN YANKTON MUNICIPAL AIRPORT.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 5.9 hours before the alert went out and 202 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, Omaha, NE at 12:00Z on 2021-07-06Temperature 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, Omaha, NE at 12:00Z on 2021-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939Sfc1 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
1590 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS53 KFSD 061754
SVRFSD
SDC027-125-135-061845-
/O.NEW.KFSD.SV.W.0044.210706T1754Z-210706T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1254 PM CDT Tue Jul 6 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Northern Clay County in southeastern South Dakota...
  Yankton County in southeastern South Dakota...
  Southeastern Turner County in southeastern South Dakota...

* Until 145 PM CDT.

* At 1254 PM CDT, a severe thunderstorm was located near Utica, or 7
  miles north of Yankton, moving east at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Mayfield and Mission Hill around 105 PM CDT.
  Irene and Volin around 115 PM CDT.
  Wakonda around 120 PM CDT.
  Centerville around 130 PM CDT.

Other locations impacted by this severe thunderstorm include
Lesterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4289 9753 4313 9762 4321 9693 4309 9692
      4308 9690 4291 9687
TIME...MOT...LOC 1754Z 260DEG 33KT 4300 9743 

HAIL...0.75IN
WIND...60MPH
 
$$

APT
3 follow-up statements
840 
WWUS53 KFSD 061812
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
112 PM CDT Tue Jul 6 2021

SDC027-125-135-061845-
/O.CON.KFSD.SV.W.0044.000000T0000Z-210706T1845Z/
Clay SD-Yankton SD-Turner SD-
112 PM CDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NORTHERN CLAY...CENTRAL YANKTON AND SOUTHEASTERN TURNER
COUNTIES...

At 111 PM CDT, severe thunderstorms were located along a line
extending from near Mayfield to 6 miles northwest of Volin to near
Mission Hill, moving east at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Volin around 115 PM CDT.
  Irene and Wakonda around 125 PM CDT.
  Viborg around 130 PM CDT.
  Centerville around 135 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4290 9749 4312 9756 4321 9693 4309 9692
      4308 9690 4291 9687
TIME...MOT...LOC 1811Z 268DEG 41KT 4314 9734 4302 9727 4291 9724 

HAIL...0.75IN
WIND...60MPH
 
$$

APT
547 
WWUS53 KFSD 061830 RRA
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
130 PM CDT Tue Jul 6 2021

SDC027-125-135-061845-
/O.CON.KFSD.SV.W.0044.000000T0000Z-210706T1845Z/
Clay SD-Yankton SD-Turner SD-
130 PM CDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NORTHERN CLAY...NORTHEASTERN YANKTON AND SOUTHEASTERN TURNER
COUNTIES...

At 130 PM CDT, severe thunderstorms were located along a line
extending from near Irene to near Wakonda to 6 miles north of
Meckling, moving east at 35 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Centerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4290 9724 4314 9741 4321 9693 4309 9692
      4308 9690 4291 9687
TIME...MOT...LOC 1830Z 260DEG 30KT 4315 9719 4304 9709 4293 9705 

HAIL...0.75IN
WIND...60MPH
 
$$

APT
139 
WWUS53 KFSD 061845
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
145 PM CDT Tue Jul 6 2021

SDC027-125-135-061855-
/O.EXP.KFSD.SV.W.0044.000000T0000Z-210706T1845Z/
Clay SD-Yankton SD-Turner SD-
145 PM CDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLAY...NORTHEASTERN
YANKTON AND SOUTHEASTERN TURNER COUNTIES HAS EXPIRED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

LAT...LON 4290 9724 4314 9741 4321 9693 4309 9692
      4308 9690 4291 9687
TIME...MOT...LOC 1845Z 260DEG 33KT 4317 9701 4306 9691 4295 9687 

$$

APT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 7:16 PM CDTSevere Thunderstorm WarningFSDLincoln, Minnehaha, Moody44 min
Jul 6, 1:05 PM CDTSevere Thunderstorm WarningFSDClay, Yankton25 min
Jul 6, 1:14 PM CDTSevere Thunderstorm WarningFSDClay, Turner, Yankton31 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.