Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 148, NWS Sioux Falls, SD

August 30, 2021Hutchinson County, Turner County, Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 30, 2021, 5:59 PM CDT for Hutchinson County, Turner County, Yankton County, South Dakota. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 30, 2021, 5:59 PM CDT (22:59 UTC)
Expired: Aug 30, 2021, 6:22 PM CDT
In force: 23 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hutchinson County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 73 km from the middle of the area, began a volume at 23:03 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.0 hours before the alert went out and 187 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1772 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

146 
WUUS53 KFSD 302259
SVRFSD
SDC067-125-135-310000-
/O.NEW.KFSD.SV.W.0148.210830T2259Z-210831T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
559 PM CDT Mon Aug 30 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  North central Yankton County in southeastern South Dakota...
  Southern Turner County in southeastern South Dakota...
  Eastern Hutchinson County in southeastern South Dakota...

* Until 700 PM CDT.

* At 558 PM CDT, a severe thunderstorm was located near Clayton, or
  20 miles east of Parkston, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Public reported quarter size hail 1 mile south of 
           Clayton at 548 PM.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Freeman and Hurley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4336 9789 4341 9767 4346 9752 4333 9697
      4305 9745
TIME...MOT...LOC 2258Z 301DEG 20KT 4338 9759 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BP

1 follow-up statement

328 
WWUS53 KFSD 302322
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
622 PM CDT Mon Aug 30 2021

SDC067-125-135-302332-
/O.CAN.KFSD.SV.W.0148.000000T0000Z-210831T0000Z/
Yankton SD-Turner SD-Hutchinson SD-
622 PM CDT Mon Aug 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL YANKTON...
SOUTHERN TURNER AND EASTERN HUTCHINSON COUNTIES 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.  However small hail and
gusty winds are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.

LAT...LON 4336 9789 4341 9767 4346 9752 4333 9697
      4305 9745
TIME...MOT...LOC 2320Z 301DEG 20KT 4331 9743 

$$

BP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 4:19 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson	56 min
Aug 30, 5:25 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	35 min
Aug 30, 5:30 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, Hutchinson, McCook	30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.