Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Aberdeen, SD

June 11, 2021Big Stone County, Traverse County, Minnesota; 7 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 11, 2021, 5:02 AM CDT for Big Stone County, Traverse County, Minnesota; 7 counties in South Dakota. It was in force for 43 min. 1 report 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: Jun 11, 2021, 5:02 AM CDT (10:02 UTC)
Expired: Jun 11, 2021, 5:45 AM CDT
In force: 43 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Big Stone County, MN, Traverse County, MN, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 146 km from the middle of the area, began a volume at 10:02 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

Time	Report	Where	Remark
Jun 11, 5:24 AM CDT	TSTM WND GST 59	Wilmot, SD

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.

Issued	Product	Office	Lasted
Jun 11, 2:15 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.0 hours before the alert went out and 158 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1337 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2725 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

320 
WUUS53 KABR 111002
SVRABR
MNC011-155-SDC025-029-037-039-051-091-109-111045-
/O.NEW.KABR.SV.W.0034.210611T1002Z-210611T1045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
502 AM CDT Fri Jun 11 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Traverse County in west central Minnesota...
  Big Stone County in west central Minnesota...
  North central Deuel County in northeastern South Dakota...
  Roberts County in northeastern South Dakota...
  Day County in northeastern South Dakota...
  Eastern Marshall County in northeastern South Dakota...
  Grant County in northeastern South Dakota...
  Northeastern Clark County in northeastern South Dakota...
  Northern Codington County in northeastern South Dakota...

* Until 545 AM CDT.

* At 501 AM CDT, severe thunderstorms were located along a line
  extending from near Claire City to near Florence, moving east at 60
  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.

* Severe thunderstorms will be near...
  New Effington around 505 AM CDT.
  Victor around 510 AM CDT.
  Rosholt around 515 AM CDT.
  South Shore, Waverly, Whiterock Colony and Mud Lake Landing around 
  520 AM CDT.

Other locations in the path of these severe thunderstorms include
Wheaton, Stockholm, Troy, Strandburg, Twin Brooks, Immanuel Church,
La Bolt, Tintah, Charlesville, Revillo and Albee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4522 9627 4525 9629 4527 9645 4497 9645
      4499 9787 4593 9754 4594 9656 4600 9657
      4601 9627 4542 9624 4541 9612 4518 9611
TIME...MOT...LOC 1001Z 268DEG 54KT 4591 9701 4508 9733 

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

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 5:49 AM CDT	Severe Thunderstorm Warning	ABR	Big Stone, Traverse	33 min
Jun 10, 11:06 PM CDT	Severe Thunderstorm Warning	ABR	Corson	39 min
Jun 11, 1:02 AM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	43 min
Jun 11, 1:15 AM CDT	Severe Thunderstorm Warning	ABR	Dewey, Jones, Stanley	45 min
Jun 11, 1:47 AM CDT	Special Weather Statement	ABR	Walworth	43 min
Jun 11, 2:37 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, McPherson, Potter, Walworth	38 min
Jun 11, 2:54 AM CDT	Severe Thunderstorm Warning	ABR	Faulk, Potter, Sully	36 min
Jun 11, 3:16 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, Faulk, McPherson, Potter, Walworth	44 min
Jun 11, 3:23 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Spink	52 min
Jun 11, 3:38 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Edmunds, Faulk, McPherson, Marshall and 1 more	52 min
Jun 11, 4:16 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Clark, Codington, Day, Grant, Marshall and 2 more	44 min
Jun 11, 4:49 AM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Grant, Hamlin, Spink	41 min
Jun 11, 5:35 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Deuel, Hamlin	40 min

Nearby

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