Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 24, NWS Sioux Falls, SD

August 6, 2015Brookings County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Aug 6, 2015, 6:22 PM CDT for Brookings County, Kingsbury County, South Dakota. It was in force for 23 min. 4 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: Aug 6, 2015, 6:22 PM CDT (23:22 UTC)
Expired: Aug 6, 2015, 6:45 PM CDT
In force: 23 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Brookings County, SD, Kingsbury County, SD

The radar

The Sioux Falls radar (KFSD), 89 km from the middle of the area, began a volume at 23:23 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
Aug 6, 6:33 PM CDT	TORNADO	3 Nnw Volga, SD	SOME CORN DAMAGE...BRIEF TOUCHDOWN
Aug 6, 6:44 PM CDT	HAIL 1.75	Volga, SD	50MPH WINDS
Aug 6, 6:55 PM CDT	TSTM WND GST 63	Volga, SD	FIVE MINUTE GUST OBSERVATION...TIME ESTIMATED FROM RADAR
Aug 6, 6:55 PM CDT	TSTM WND GST 63	Volga, SD	HOURLY GUST OBSERVATION...TIME ESTIMATED FROM RADAR

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
Aug 6, 3:23 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.4 hours before the alert went out and 122 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: 638 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

190 
WFUS53 KFSD 062322
TORFSD
SDC011-077-062345-
/O.NEW.KFSD.TO.W.0024.150806T2322Z-150806T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
622 PM CDT THU AUG 6 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  EAST CENTRAL KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 645 PM CDT
    
* AT 622 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER ARLINGTON...OR 16 MILES EAST OF LAKE
  THOMPSON STATE RECREATION AREA...MOVING EAST AT 25 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS DANGEROUS STORM WILL BE NEAR...
  VOLGA AROUND 645 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
SIOUX FALLS.

&&

LAT...LON 4433 9719 4440 9717 4441 9688 4428 9692
TIME...MOT...LOC 2322Z 276DEG 22KT 4438 9713 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DUX

2 follow-up statements

433 
WWUS53 KFSD 062332
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
632 PM CDT THU AUG 6 2015

SDC077-062341-
/O.CAN.KFSD.TO.W.0024.000000T0000Z-150806T2345Z/
KINGSBURY SD-
632 PM CDT THU AUG 6 2015

...THE TORNADO WARNING FOR EAST CENTRAL KINGSBURY COUNTY IS
CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
EAST CENTRAL SOUTH DAKOTA.

LAT...LON 4431 9711 4438 9707 4439 9689 4428 9692
TIME...MOT...LOC 2331Z 283DEG 24KT 4433 9706 

$$

SDC011-062345-
/O.CON.KFSD.TO.W.0024.000000T0000Z-150806T2345Z/
BROOKINGS SD-
632 PM CDT THU AUG 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR WEST
CENTRAL BROOKINGS COUNTY...
    
AT 631 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR ARLINGTON...OR 13 MILES WEST OF BROOKINGS...MOVING
EAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

THIS DANGEROUS STORM WILL BE NEAR...
  VOLGA AROUND 645 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL NEAREST LAW ENFORCEMENT AGENCY
WHO WILL SEND YOUR REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE
PATH OF DANGEROUS WEATHER.

&&

LAT...LON 4431 9711 4438 9707 4439 9689 4428 9692
TIME...MOT...LOC 2331Z 283DEG 24KT 4433 9706 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DUX

960 
WWUS53 KFSD 062344
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
644 PM CDT THU AUG 6 2015

SDC011-062354-
/O.EXP.KFSD.TO.W.0024.000000T0000Z-150806T2345Z/
BROOKINGS SD-
644 PM CDT THU AUG 6 2015

...THE TORNADO WARNING FOR WEST CENTRAL BROOKINGS COUNTY WILL EXPIRE
AT 645 PM CDT...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY
AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.
GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
EAST CENTRAL SOUTH DAKOTA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
SIOUX FALLS.

LAT...LON 4431 9711 4438 9707 4439 9689 4428 9692
TIME...MOT...LOC 2343Z 276DEG 22KT 4433 9706 

$$

DUX

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 3:57 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	26 min
Aug 6, 6:14 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	46 min
Aug 6, 6:50 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Moody	40 min
Aug 6, 6:56 PM CDT	Tornado Warning	FSD	Brookings	34 min

Nearby

Tornado Warnings in South Dakota, 2015 Every tornado warning in 2015 Tornadoes 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.