Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Aberdeen, SD

May 23, 2021Buffalo County, Hughes County, Lyman County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at May 23, 2021, 10:04 PM CDT for Buffalo County, Hughes County, Lyman County, South Dakota. It was in force for 41 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: May 23, 2021, 10:04 PM CDT (03:04 UTC)
Expired: May 23, 2021, 10:45 PM CDT
In force: 41 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Buffalo County, SD, Hughes County, SD, Lyman County, SD

The radar

The Aberdeen radar (KABR), 210 km from the middle of the area, began a volume at 03:04 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
May 23, 10:17 PM CDT	TSTM WND GST 85	3 Se Reliance, SD	MESONET STATION 54 RELIANCE (SDDOT).

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, 3.1 hours before the alert went out and 159 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: 407 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 2081 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

829 
WUUS53 KABR 240304
SVRABR
SDC017-065-085-240345-
/O.NEW.KABR.SV.W.0004.210524T0304Z-210524T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1004 PM CDT Sun May 23 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hughes County in central South Dakota...
  Lyman County in central South Dakota...
  Buffalo County in central South Dakota...

* Until 1045 PM CDT.

* At 1002 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles south of Rousseau to 6 miles northeast of
  Fate Dam to 6 miles northwest of Ideal, moving east at 65 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Trained weather spotters. At 940 PM CDT, a 78 mph wind 
           gust was reported 3 miles west of Presho and multiple 
           vehicles blown over on Interstate 90.

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

* Severe thunderstorms will be near...
  Kennebec and Byre Lake around 1005 PM CDT.
  Cedar Creek Rec Area around 1010 PM CDT.
  Lower Brule, Medicine Butte and Joe Creek Rec Area around 1015 PM 
  CDT.
  Counselor Creek Boat Access Area and West Bend Rec Area around 
  1020 PM CDT.

Other locations in the path of these severe thunderstorms include
Fort Thompson, Lake Sharpe, Tailrace Rec Area, Lake Francis Case,
Lees Corner and Etbauer Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Lyman. SEEK SHELTER NOW inside a sturdy structure 
and stay away from windows! 
&&

LAT...LON 4377 9965 4373 9967 4376 9968 4376 9969
      4371 9975 4370 9986 4367 9987 4370 9990
      4370 10015 4397 10013 4419 10024 4419 9909
      4393 9909 4393 9935 4386 9931 4368 9947
      4365 9945 4365 9936 4350 9930 4350 9963
TIME...MOT...LOC 0302Z 261DEG 59KT 4421 10013 4400 9992 4361 10000 

HAIL...<.75IN
WIND...70MPH
 
$$

SRF

1 follow-up statement

384 
WWUS53 KABR 240319
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1019 PM CDT Sun May 23 2021

SDC017-065-085-240345-
/O.CON.KABR.SV.W.0004.000000T0000Z-210524T0345Z/
Hughes SD-Lyman SD-Buffalo SD-
1019 PM CDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTHEASTERN HUGHES...LYMAN AND BUFFALO COUNTIES...

At 1018 PM CDT, severe thunderstorms were located along a line
extending from near Lake Sharpe to near Lower Brule to near Hamill,
moving east at 55 mph.

These are very dangerous storms.

HAZARD...80 mph wind gusts.

SOURCE...Trained weather spotters. At 1002 PM CDT, a 83 mph wind was 
         reported 6 miles southwest of Joe Creek Recreation Area.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
  Tailrace Rec Area, Counselor Creek Boat Access Area, Fort 
  Thompson, Lake Francis Case, Oacoma, Lees Corner, Dude Ranch and 
  Etbauer Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Lyman County. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.

&&

LAT...LON 4377 9965 4373 9967 4376 9968 4376 9969
      4371 9975 4370 9986 4367 9987 4370 9990
      4371 9999 4397 10001 4419 10004 4419 9909
      4393 9909 4393 9935 4386 9931 4368 9947
      4365 9945 4365 9936 4350 9930 4350 9963
TIME...MOT...LOC 0318Z 260DEG 49KT 4425 9981 4404 9960 4365 9968 

HAIL...<.75IN
WIND...80MPH
 
$$

SRF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:59 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	46 min
May 23, 9:37 PM CDT	Special Weather Statement	ABR	Hughes	23 min
May 23, 10:14 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Faulk, Hand, Hughes, Hyde, Lyman and 2 more	46 min
May 23, 10:46 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Faulk, Hand, Hyde, Potter, Sully	44 min
May 23, 11:06 PM CDT	Special Weather Statement	ABR	Edmunds, Walworth	24 min
May 23, 11:23 PM CDT	Special Weather Statement	ABR	Spink	37 min
May 23, 11:30 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, Faulk, McPherson, Walworth	45 min
May 24, 12:03 AM CDT	Special Weather Statement	ABR	Brown	42 min
May 24, 12:11 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, McPherson, Marshall, Spink	49 min
May 24, 12:14 AM CDT	Special Weather Statement	ABR	Clark, Day	46 min
May 24, 12:55 AM CDT	Special Weather Statement	ABR	Marshall	35 min
May 24, 1:00 AM CDT	Special Weather Statement	ABR	Codington, Deuel, Grant, Hamlin, Roberts	60 min
May 24, 1:17 AM CDT	Special Weather Statement	ABR	Roberts	43 min
May 24, 2:59 PM CDT	Wind Advisory	ABR	Brown, Campbell, Corson, Day, Dewey, Edmunds and 4 more	28 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.