Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 53, NWS Aberdeen, SD

July 8, 2021Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 8, 2021, 8:35 PM MDT for Dewey County, South Dakota. It was in force for 26 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: Jul 8, 2021, 8:35 PM MDT (02:35 UTC)
Expired: Jul 8, 2021, 9:01 PM MDT
In force: 26 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Dewey County, SD

The radar

The Rapid City radar (KUDX), 149 km from the middle of the area, began a volume at 02:38 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
Jul 8, 8:50 PM MDT	HAIL 1	1 Ssw Lantry, SD	CORRECTS PREVIOUS HAIL REPORT FROM 1 SSW LANTRY. TIME OF REPORT ESTIMATED BY RADAR. MEASURED 0.75 INCHES OF RAIN DURING THIS EVENT.

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
Jul 8, 8:33 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 2.6 hours before the alert went out and 156 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: 1357 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 2075 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

651 
WUUS53 KABR 090235
SVRABR
SDC041-090315-
/O.NEW.KABR.SV.W.0053.210709T0235Z-210709T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
835 PM MDT Thu Jul 8 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Southwestern Dewey County in north central South Dakota...

* Until 915 PM MDT.

* At 834 PM MDT, a severe thunderstorm was located near Lantry,
  moving southeast at 40 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Lantry around 840 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4504 10148 4511 10148 4499 10122 4499 10150
      4503 10150
TIME...MOT...LOC 0234Z 315DEG 29KT 4501 10153 

HAIL...1.50IN
WIND...60MPH
 
$$

Connelly

1 follow-up statement

397 
WWUS53 KABR 090301
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
901 PM MDT Thu Jul 8 2021

SDC041-090311-
/O.CAN.KABR.SV.W.0053.000000T0000Z-210709T0315Z/
Dewey SD-
901 PM MDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DEWEY COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM MDT for
north central South Dakota.

LAT...LON 4504 10148 4511 10148 4499 10122 4499 10150
      4503 10150
TIME...MOT...LOC 0300Z 315DEG 29KT 4485 10131 

$$

Connelly

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 9:45 PM MDT	Severe Thunderstorm Warning	ABR	Corson	45 min
Jul 8, 10:22 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	53 min
Jul 9, 1:46 AM MDT	Special Weather Statement	ABR	Dewey	44 min
Jul 9, 3:17 AM MDT	Severe Thunderstorm Warning	ABR	Dewey, Sully	27 min

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.