Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 13, NWS Sioux Falls, SD

June 6, 2015Clay County, Turner County, Yankton County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 6, 2015, 8:30 PM CDT for Clay County, Turner County, Yankton County, South Dakota. It was in force for 13 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
Jun 6, 2015, 8:30 PM CDT (01:30 UTC)
Expired
Jun 6, 2015, 8:43 PM CDT
In force
13 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Clay County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 63 km from the middle of the area, began a volume at 01:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 6, 3:40 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 207 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2015-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1554 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2015-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1554 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1214 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
388 m²/s²
Significant tornado parameter
0.9
Supercell composite
13.1

Open this sounding in Storm Lab

The text

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

744 
WFUS53 KFSD 070130
TORFSD
SDC027-125-135-070200-
/O.NEW.KFSD.TO.W.0013.150607T0130Z-150607T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
830 PM CDT SAT JUN 6 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN TURNER COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
  NORTHEASTERN YANKTON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
  NORTHWESTERN CLAY COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 900 PM CDT

* AT 830 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER IRENE...OR 17 MILES NORTHEAST OF
  YANKTON...MOVING EAST AT 20 MPH.

  HAZARD...TORNADO. 

  SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD. 

  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...
  VIBORG AROUND 840 PM CDT.
  CENTERVILLE AROUND 900 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO NOT
WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 4306 9725 4315 9726 4320 9692 4302 9692
TIME...MOT...LOC 0130Z 272DEG 19KT 4309 9717 

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

$$

HANKO
1 follow-up statement
723 
WWUS53 KFSD 070143
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
843 PM CDT SAT JUN 6 2015

SDC027-125-135-070152-
/O.CAN.KFSD.TO.W.0013.000000T0000Z-150607T0200Z/
TURNER SD-YANKTON SD-CLAY SD-
843 PM CDT SAT JUN 6 2015

...THE TORNADO WARNING FOR SOUTHEASTERN TURNER...NORTHEASTERN YANKTON
AND NORTHWESTERN CLAY COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER SMALL HAIL IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FOR SOUTHEASTERN
SOUTH DAKOTA.

LAT...LON 4306 9725 4315 9726 4320 9692 4302 9692
TIME...MOT...LOC 0140Z 272DEG 19KT 4309 9708 

$$

HANKO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 7:02 PM CDTSevere Thunderstorm WarningFSDCharles Mix24 min
Jun 6, 7:31 PM CDTSevere Thunderstorm WarningFSDClay, Union44 min
Jun 6, 7:44 PM CDTTornado WarningFSDClay31 min
Jun 6, 8:22 PM CDTSevere Thunderstorm WarningFSDLake, Moody38 min
Jun 6, 9:23 PM CDTFlash Flood WarningFSDLake, Moody3 hr
Jun 6, 10:11 PM CDTFlash Flood WarningFSDUnion3 hr
Jun 7, 10:47 AM CDTRiver Flood WarningFSDMinnehaha, Moody40 hr
Jun 7, 4:08 PM CDTFlash Flood WarningFSDBeadle3 hr
Jun 7, 4:34 PM CDTTornado WarningFSDMiner12 min
Jun 7, 4:52 PM CDTSevere Thunderstorm WarningFSDHanson, McCook, Miner23 min

Nearby

Tornado Warnings in South Dakota, 2015Every tornado warning in 2015Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.