Alert archive / South Dakota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 101, NWS Sioux Falls, SD

July 23, 2015Beadle County, Jerauld County, Sanborn County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 23, 2015, 7:24 PM CDT for Beadle County, Jerauld County, Sanborn County, South Dakota. It was in force for 51 min. 6 reports 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 23, 2015, 7:24 PM CDT (00:24 UTC)
Expired: Jul 23, 2015, 8:15 PM CDT
In force: 51 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Beadle County, SD, Jerauld County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 140 km from the middle of the area, began a volume at 00:24 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 23, 7:28 PM CDT	HAIL 1	3 Nnw Lane, SD
Jul 23, 7:30 PM CDT	HAIL 1.75	4 N Lane, SD
Jul 23, 7:35 PM CDT	HAIL 1.25	3 Wsw Alpena, SD
Jul 23, 7:43 PM CDT	HAIL 1.5	4 Wsw Alpena, SD
Jul 23, 8:00 PM CDT	HAIL 1.5	4 Ene Alpena, SD	PICTURE FROM SOCIAL MEDIA
Jul 23, 8:18 PM CDT	HAIL 1	9 Sse Huron, 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, 0.4 hours before the alert went out and 86 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: 3528 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1264 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

613 
WUUS53 KFSD 240024
SVRFSD
SDC005-073-111-240115-
/O.NEW.KFSD.SV.W.0101.150724T0024Z-150724T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
724 PM CDT THU JUL 23 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN JERAULD COUNTY IN CENTRAL SOUTH DAKOTA...
  SOUTHEASTERN BEADLE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 815 PM CDT

* AT 724 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER LANE...OR 20
  MILES SOUTHWEST OF HURON...MOVING NORTHEAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  WOONSOCKET AND ALPENA AROUND 735 PM CDT.
  CAVOUR AROUND 805 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4400 9849 4420 9860 4440 9804 4407 9787
TIME...MOT...LOC 0024Z 244DEG 32KT 4410 9843 

HAIL...1.25IN
WIND...60MPH
 
$$

HANKO

1 follow-up statement

956 
WWUS53 KFSD 240043
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
743 PM CDT THU JUL 23 2015

SDC005-073-111-240115-
/O.CON.KFSD.SV.W.0101.000000T0000Z-150724T0115Z/
JERAULD SD-BEADLE SD-SANBORN SD-
743 PM CDT THU JUL 23 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHEASTERN JERAULD...SOUTHEASTERN BEADLE AND NORTHERN SANBORN
COUNTIES...

AT 742 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HURON...MOVING
NORTHEAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...PUBLIC. AT 735 PM CDT HALF DOLLAR SIZED HAIL WAS REPORTED 3 
MILES WEST SOUTHWEST OF ALPENA.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

THIS SEVERE STORM WILL BE NEAR...
  HURON AROUND 755 PM CDT.
  CAVOUR AROUND 800 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4403 9834 4423 9851 4440 9804 4407 9787
TIME...MOT...LOC 0042Z 231DEG 32KT 4427 9824 

HAIL...1.25IN
WIND...60MPH
 
$$

HANKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 7:55 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Sanborn	33 min
Jul 23, 8:10 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Sanborn	50 min
Jul 23, 8:39 PM CDT	Tornado Warning Tornado observed	FSD	Beadle, Sanborn	36 min
Jul 23, 8:55 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Miner, Sanborn	50 min
Jul 23, 9:13 PM CDT	Tornado Warning	FSD	Beadle, Sanborn	32 min
Jul 23, 9:45 PM CDT	Tornado Warning	FSD	Kingsbury, Miner, Sanborn	45 min
Jul 23, 10:24 PM CDT	Tornado Warning	FSD	Miner	51 min
Jul 23, 11:15 PM CDT	Tornado Warning	FSD	Lake, Miner	25 min
Jul 23, 11:38 PM CDT	Severe Thunderstorm Warning	FSD	Lake	14 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2015 Every severe thunderstorm warning in 2015

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.