Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 20, NWS Sioux Falls, SD

July 23, 2015Kingsbury County, Miner County, Sanborn County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 23, 2015, 9:45 PM CDT for Kingsbury County, Miner County, Sanborn County, South Dakota. It was in force for 45 min. 3 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, 9:45 PM CDT (02:45 UTC)
Expired: Jul 23, 2015, 10:30 PM CDT
In force: 45 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Kingsbury County, SD, Miner County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 105 km from the middle of the area, began a volume at 02:45 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, 10:10 PM CDT	TORNADO	2 Nw Fedora, SD
Jul 23, 10:15 PM CDT	HAIL 0.88	5 Nnw Fedora, SD	SAW A TORNADO DISSIPATE OFF TO THE WEST, BUT OTHERWISE JUST HEAVY RAIN AND NICKEL HAIL OCCURRING.
Jul 23, 10:25 PM CDT	TORNADO	2 N Roswell, 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, 2.8 hours before the alert went out and 97 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.

381 
WFUS53 KFSD 240245
TORFSD
SDC077-097-111-240330-
/O.NEW.KFSD.TO.W.0020.150724T0245Z-150724T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
945 PM CDT THU JUL 23 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHEASTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHWESTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 1030 PM CDT
    
* AT 945 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 8 MILES NORTH OF ARTESIAN...OR 20 MILES
  SOUTHEAST OF HURON...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...
  CARTHAGE AROUND 1015 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.

&&

LAT...LON 4401 9756 4403 9802 4418 9805 4420 9792
      4420 9786 4421 9785 4424 9759
TIME...MOT...LOC 0245Z 258DEG 21KT 4412 9797 

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

$$

HANKO

2 follow-up statements

019 
WWUS53 KFSD 240259
SVSFSD

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

SDC077-097-111-240330-
/O.CON.KFSD.TO.W.0020.000000T0000Z-150724T0330Z/
KINGSBURY SD-SANBORN SD-MINER SD-
959 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR
SOUTHWESTERN KINGSBURY...NORTHEASTERN SANBORN AND NORTHWESTERN MINER
COUNTIES...
    
AT 959 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR FEDORA...OR 24 MILES SOUTHWEST OF LAKE THOMPSON
STATE RECREATION AREA...MOVING EAST AT 10 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL. 

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...
  CARTHAGE AROUND 1020 PM CDT.
  VILAS AROUND 1030 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 4403 9794 4419 9800 4420 9792 4420 9786
      4421 9785 4424 9759 4401 9756
TIME...MOT...LOC 0259Z 277DEG 10KT 4408 9782 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

HANKO

530 
WWUS53 KFSD 240313
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1013 PM CDT THU JUL 23 2015

SDC077-097-111-240330-
/O.CON.KFSD.TO.W.0020.000000T0000Z-150724T0330Z/
KINGSBURY SD-SANBORN SD-MINER SD-
1013 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR
SOUTHWESTERN KINGSBURY...NORTHEASTERN SANBORN AND NORTHWESTERN MINER
COUNTIES...
    
AT 1012 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR FEDORA...OR 22
MILES SOUTHWEST OF LAKE THOMPSON STATE RECREATION AREA...MOVING EAST
AT 10 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO. AT 1010 PM CDT A TORNADO 
WAS REPORTED ON THE GROUND 2 MILES NORTHWEST OF FEDORA. 

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 TORNADO WILL BE NEAR...
  CARTHAGE AROUND 1025 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 4403 9794 4419 9800 4420 9792 4420 9786
      4421 9785 4424 9759 4401 9756
TIME...MOT...LOC 0312Z 265DEG 11KT 4408 9777 

TORNADO...OBSERVED
HAIL...1.00IN

$$

HANKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 7:24 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld, Sanborn	51 min
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, 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

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.