Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 22, NWS Sioux Falls, SD

July 23, 2015Lake County, Miner County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 23, 2015, 11:15 PM CDT for Lake County, Miner County, South Dakota. It was in force for 25 min. 1 report 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, 11:15 PM CDT (04:15 UTC)
Expired: Jul 23, 2015, 11:40 PM CDT
In force: 25 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Lake County, SD, Miner County, SD

The radar

The Sioux Falls radar (KFSD), 80 km from the middle of the area, began a volume at 04:14 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, 11:30 PM CDT	HAIL 1.75	5 N Winfred, SD	PICTURE FROM SOCIAL MEDIA

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, 4.3 hours before the alert went out and 119 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.

861 
WFUS53 KFSD 240415
TORFSD
SDC079-097-240500-
/O.NEW.KFSD.TO.W.0022.150724T0415Z-150724T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1115 PM CDT THU JUL 23 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHEASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL MIDNIGHT CDT
    
* AT 1115 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER HOWARD...OR 17 MILES WEST OF LAKE HERMAN
  STATE PARK...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...
  WINFRED AROUND 1200 AM 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 4403 9760 4413 9758 4414 9730 4394 9735
TIME...MOT...LOC 0415Z 286DEG 9KT 4403 9751 

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

$$

HANKO

2 follow-up statements

309 
WWUS53 KFSD 240431
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1131 PM CDT THU JUL 23 2015

SDC079-097-240500-
/O.CON.KFSD.TO.W.0022.000000T0000Z-150724T0500Z/
LAKE SD-MINER SD-
1131 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR WEST
CENTRAL LAKE AND NORTHEASTERN MINER COUNTIES...
    
AT 1130 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR WINFRED...OR 14 MILES NORTHWEST OF LAKE HERMAN STATE
PARK...MOVING EAST AT 20 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...
  WINFRED AROUND 1135 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 4404 9750 4413 9750 4414 9730 4398 9734
TIME...MOT...LOC 0430Z 259DEG 16KT 4408 9742 

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

$$

HANKO

839 
WWUS53 KFSD 240440
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1140 PM CDT THU JUL 23 2015

SDC079-097-240450-
/O.CAN.KFSD.TO.W.0022.000000T0000Z-150724T0500Z/
LAKE SD-MINER SD-
1140 PM CDT THU JUL 23 2015

...THE TORNADO WARNING FOR WEST CENTRAL LAKE AND NORTHEASTERN MINER
COUNTIES IS CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.


LAT...LON 4404 9750 4413 9750 4414 9730 4398 9734
TIME...MOT...LOC 0437Z 286DEG 9KT 4407 9739 

$$

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, 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, 11:38 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.