Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Aberdeen, SD

July 25, 2021Hand County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 25, 2021, 7:30 PM CDT for Hand County, South Dakota. It was in force for 36 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 25, 2021, 7:30 PM CDT (00:30 UTC)
Expired: Jul 25, 2021, 8:06 PM CDT
In force: 36 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Hand County, SD

The radar

The Aberdeen radar (KABR), 104 km from the middle of the area, began a volume at 00:30 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 25, 7:39 PM CDT	HAIL 1	8 Nnw Miller, SD

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, 0.5 hours before the alert went out and 62 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: 1771 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 2015 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 31.3

Open this sounding in Storm Lab

The text

As transmitted.

524 
WUUS53 KABR 260030
SVRABR
SDC059-260130-
/O.NEW.KABR.SV.W.0076.210726T0030Z-210726T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
730 PM CDT Sun Jul 25 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Central Hand County in central South Dakota...

* Until 830 PM CDT.

* At 730 PM CDT, a severe thunderstorm was located 8 miles south of
  Polo, or 12 miles northwest of Miller, moving southeast at 20 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Miller and St. Lawrence.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Aberdeen.

&&

LAT...LON 4471 9930 4478 9921 4464 9876 4443 9895
TIME...MOT...LOC 0030Z 297DEG 16KT 4466 9914 

HAIL...1.25IN
WIND...<50MPH
 
$$

Parkin

1 follow-up statement

983 
WWUS53 KABR 260106
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
806 PM CDT Sun Jul 25 2021

SDC059-260116-
/O.CAN.KABR.SV.W.0076.000000T0000Z-210726T0130Z/
Hand SD-
806 PM CDT Sun Jul 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HAND COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 4471 9930 4478 9921 4464 9876 4443 9895
TIME...MOT...LOC 0102Z 297DEG 16KT 4459 9894 

$$

Parkin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:03 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Hyde	42 min
Jul 25, 8:11 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	49 min
Jul 25, 8:54 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington	51 min
Jul 26, 3:41 AM CDT	Heat Advisory	ABR	Brown, Buffalo, Campbell, Corson, Dewey, Edmunds and 12 more	15 hr
Jul 26, 3:41 AM CDT	Heat Advisory	ABR	Brown, Buffalo, Campbell, Clark, Codington, Corson and 18 more	41 hr
Jul 26, 4:00 AM CDT	Special Weather Statement	ABR	Corson	30 min
Jul 26, 4:05 AM CDT	Severe Thunderstorm Warning	ABR	Corson	28 min
Jul 26, 7:12 AM CDT	Special Weather Statement	ABR	Day	18 min
Jul 26, 8:35 AM CDT	Special Weather Statement	ABR	Walworth	25 min
Jul 26, 9:03 AM CDT	Special Weather Statement	ABR	Walworth	27 min
Jul 26, 9:43 AM CDT	Severe Thunderstorm Warning	ABR	Walworth	32 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.