Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 12, NWS Sioux Falls, SD

June 6, 2015Clay County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 6, 2015, 7:44 PM CDT for Clay County, South Dakota. It was in force for 31 min. 2 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: Jun 6, 2015, 7:44 PM CDT (00:44 UTC)
Expired: Jun 6, 2015, 8:15 PM CDT
In force: 31 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Clay County, SD

The radar

The Sioux Falls radar (KFSD), 85 km from the middle of the area, began a volume at 00:46 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
Jun 6, 7:56 PM CDT	FUNNEL CLOUD	3 Nnw Vermillion, SD
Jun 6, 8:01 PM CDT	HAIL 0.88	3 Nw Vermillion, SD

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
Jun 6, 3:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.7 hours before the alert went out and 175 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: 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.

775 
WFUS53 KFSD 070044
TORFSD
SDC027-070115-
/O.NEW.KFSD.TO.W.0012.150607T0044Z-150607T0115Z/

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CLAY COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 815 PM CDT

* AT 743 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR VERMILLION...MOVING NORTHEAST AT 10 MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

  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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHEASTERN CLAY COUNTY.

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.

&&

LAT...LON 4279 9697 4284 9705 4293 9689 4283 9682
TIME...MOT...LOC 0043Z 237DEG 10KT 4283 9697 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

HANKO

3 follow-up statements

898 
WWUS53 KFSD 070054
SVSFSD

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

SDC027-070115-
/O.CON.KFSD.TO.W.0012.000000T0000Z-150607T0115Z/
CLAY SD-
754 PM CDT SAT JUN 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR EAST
CENTRAL CLAY COUNTY...
        
AT 754 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR VERMILLION...MOVING NORTHEAST AT 10 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...WEATHER SPOTTERS REPORTED A 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
EAST CENTRAL CLAY COUNTY.

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.

&&

LAT...LON 4281 9693 4287 9700 4293 9689 4283 9682
TIME...MOT...LOC 0054Z 237DEG 10KT 4285 9694 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

HANKO

658 
WWUS53 KFSD 070100
SVSFSD

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

SDC027-070115-
/O.CON.KFSD.TO.W.0012.000000T0000Z-150607T0115Z/
CLAY SD-
800 PM CDT SAT JUN 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR EAST
CENTRAL CLAY COUNTY...
        
AT 758 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR VERMILLION...MOVING NORTHEAST AT 10 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. AT 757 PM CDT A 
FUNNEL CLOUD WAS REPORTED 5 MILES NORTH OF VERMILLION. 

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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
EAST CENTRAL CLAY COUNTY.

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.

&&

LAT...LON 4281 9693 4287 9700 4293 9689 4283 9682
TIME...MOT...LOC 0058Z 237DEG 10KT 4286 9692 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

HANKO

697 
WWUS53 KFSD 070106 RRA
SVSFSD

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

SDC027-070116-
/O.EXP.KFSD.TO.W.0012.000000T0000Z-150607T0115Z/
CLAY SD-
806 PM CDT SAT JUN 6 2015

...THE TORNADO WARNING FOR EAST CENTRAL CLAY COUNTY WILL EXPIRE AT
815 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

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

LAT...LON 4281 9693 4287 9700 4293 9689 4283 9682
TIME...MOT...LOC 0104Z 237DEG 10KT 4286 9692 

$$

HANKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:02 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	24 min
Jun 6, 7:31 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	44 min
Jun 6, 8:22 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	38 min
Jun 6, 8:30 PM CDT	Tornado Warning	FSD	Clay, Turner, Yankton	13 min
Jun 6, 9:23 PM CDT	Flash Flood Warning	FSD	Lake, Moody	3 hr
Jun 6, 10:11 PM CDT	Flash Flood Warning	FSD	Union	3 hr
Jun 7, 10:47 AM CDT	River Flood Warning	FSD	Minnehaha, Moody	40 hr
Jun 7, 4:08 PM CDT	Flash Flood Warning	FSD	Beadle	3 hr
Jun 7, 4:34 PM CDT	Tornado Warning	FSD	Miner	12 min
Jun 7, 4:52 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook, Miner	23 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.