Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 41, NWS Sioux Falls, SD

July 5, 2021Lincoln County, Minnehaha County, Moody County, South Dakota; 4 counties in Minnesota; Lyon County, Osceola County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 5, 2021, 7:16 PM CDT for Lincoln County, Minnehaha County, Moody County, South Dakota; 4 counties in Minnesota; Lyon County, Osceola County, Iowa. It was in force for 44 min. 3 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 5, 2021, 7:16 PM CDT (00:16 UTC)
Expired
Jul 5, 2021, 8:00 PM CDT
In force
44 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Lyon County, IA, Osceola County, IA, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Lincoln County, SD, Minnehaha County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 56 km from the middle of the area, began a volume at 00:17 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 5, 7:40 PM CDTTSTM WND GST 603 Wsw George, IA
Jul 5, 8:03 PM CDTTSTM WND DMGAshton, IASEVERAL BRANCHES ESTIMATED AT 6 INCHES IN DIAMETER BROKEN DOWN BY WIND GUSTS.
Jul 5, 8:05 PM CDTTSTM WND DMGSibley, IA6 TO 8 INCH DIAMETER TREE BRANCHES BROKEN DOWN BY THUNDERSTORM WIND GUSTS.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.3 hours before the alert went out and 239 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 2021-07-06Temperature 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, Aberdeen, SD at 00:00Z on 2021-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
2288 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

677 
WUUS53 KFSD 060016
SVRFSD
IAC119-143-MNC101-105-117-133-SDC083-099-101-060100-
/O.NEW.KFSD.SV.W.0041.210706T0016Z-210706T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
716 PM CDT Mon Jul 5 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Lyon County in northwestern Iowa...
  Western Osceola County in northwestern Iowa...
  Rock County in southwestern Minnesota...
  Nobles County in southwestern Minnesota...
  Southwestern Murray County in southwestern Minnesota...
  Southeastern Pipestone County in southwestern Minnesota...
  Southeastern Moody County in east central South Dakota...
  Eastern Minnehaha County in southeastern South Dakota...
  Northeastern Lincoln County in southeastern South Dakota...

* Until 800 PM CDT.

* At 716 PM CDT, severe thunderstorms were located along a line
  extending from near Trosky to 7 miles south of Luverne to near
  Alvord, moving east at 35 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Rock Rapids around 720 PM CDT.
  Ellsworth around 730 PM CDT.
  George around 735 PM CDT.
  Adrian and Leota around 740 PM CDT.
  Little Rock and Lismore around 745 PM CDT.
  Rushmore around 750 PM CDT.
  Sibley, Ashton and Wilmont around 755 PM CDT.

Other locations impacted by these severe thunderstorms include
Kenneth, Steen, Magnolia and Bigelow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4387 9564 4354 9557 4331 9561 4330 9584
      4331 9663 4359 9660 4385 9674
TIME...MOT...LOC 0016Z 270DEG 31KT 4385 9627 4355 9619 4335 9623 

HAIL...0.75IN
WIND...70MPH
 
$$

JM
1 follow-up statement
791 
WWUS53 KFSD 060034
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
734 PM CDT Mon Jul 5 2021

SDC083-101-060043-
/O.CAN.KFSD.SV.W.0041.000000T0000Z-210706T0100Z/
Moody SD-Lincoln SD-
734 PM CDT Mon Jul 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MOODY AND
NORTHEASTERN LINCOLN COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened and moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4331 9561 4330 9584 4331 9651 4359 9647
      4385 9657 4387 9564 4354 9557
TIME...MOT...LOC 0033Z 270DEG 31KT 4385 9607 4355 9599 4335 9603 

$$

IAC119-143-MNC101-105-117-133-SDC099-060100-
/O.CON.KFSD.SV.W.0041.000000T0000Z-210706T0100Z/
Lyon IA-Osceola IA-Rock MN-Nobles MN-Murray MN-Pipestone MN-
Minnehaha SD-
734 PM CDT Mon Jul 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR LYON...WESTERN OSCEOLA...ROCK...NOBLES...SOUTHWESTERN MURRAY...
SOUTHEASTERN PIPESTONE AND EASTERN MINNEHAHA COUNTIES...

At 733 PM CDT, severe thunderstorms were located along a line
extending from near Leota to near Ellsworth to George, moving east at
35 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Adrian around 740 PM CDT.
  Little Rock and Lismore around 745 PM CDT.
  Rushmore around 750 PM CDT.
  Ashton and Wilmont around 755 PM CDT.
  Sibley around 800 PM CDT.
  Worthington around 810 PM CDT.

Other locations impacted by these severe thunderstorms include
Kenneth, Steen, Magnolia and Bigelow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4331 9561 4330 9584 4331 9651 4359 9647
      4385 9657 4387 9564 4354 9557
TIME...MOT...LOC 0033Z 270DEG 31KT 4385 9607 4355 9599 4335 9603 

HAIL...0.75IN
WIND...70MPH
 
$$

JM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 12:54 PM CDTSevere Thunderstorm WarningFSDClay, Turner, Yankton51 min
Jul 6, 1:05 PM CDTSevere Thunderstorm WarningFSDClay, Yankton25 min
Jul 6, 1:14 PM CDTSevere Thunderstorm WarningFSDClay, Turner, Yankton31 min
Jul 5, 7:57 PM CDTSevere Thunderstorm WarningFSDLyon, O'Brien, Osceola33 min
Jul 5, 8:24 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson, O'Brien, Osceola66 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021Severe Thunderstorm Warnings in South Dakota, 2021Severe Thunderstorm Warnings in Iowa, 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.