Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 21, NWS Sioux Falls, SD

July 23, 2015Miner County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 23, 2015, 10:24 PM CDT for Miner County, South Dakota. It was in force for 51 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: Jul 23, 2015, 10:24 PM CDT (03:24 UTC)
Expired: Jul 23, 2015, 11:15 PM CDT
In force: 51 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Miner County, SD

The radar

The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 03:28 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, 10:25 PM CDT	TORNADO	2 N Roswell, SD
Jul 23, 10:52 PM CDT	TORNADO	2 Nw Vilas, SD	CONE-SHAPED TORNADO ON THE GROUND

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, 3.4 hours before the alert went out and 113 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.

134 
WFUS53 KFSD 240324
TORFSD
SDC097-240415-
/O.NEW.KFSD.TO.W.0021.150724T0324Z-150724T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1024 PM CDT THU JUL 23 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 1115 PM CDT
    
* AT 1024 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER ROSWELL...OR 24 MILES SOUTHWEST OF LAKE
  THOMPSON STATE RECREATION AREA...MOVING EAST AT 15 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...
  ROSWELL AROUND 1030 PM CDT.
  VILAS AROUND 1050 PM CDT.
  HOWARD AROUND 1100 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 4400 9782 4413 9779 4411 9741 4389 9749
TIME...MOT...LOC 0324Z 285DEG 15KT 4403 9773 

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

$$

HANKO

2 follow-up statements

153 
WWUS53 KFSD 240336
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1036 PM CDT THU JUL 23 2015

SDC097-240415-
/O.CON.KFSD.TO.W.0021.000000T0000Z-150724T0415Z/
MINER SD-
1036 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR CENTRAL
MINER COUNTY...
    
AT 1035 PM CDT...A CONFIRMED TORNADO WAS LOCATED OVER ROSWELL...OR 23
MILES SOUTHWEST OF LAKE THOMPSON STATE RECREATION AREA...MOVING EAST
AT 15 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO. AT 1025 PM CDT AT 
TORNADO WAS REPORTED 2 MILES NORTH OF ROSWELL.

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...
  VILAS AROUND 1050 PM CDT.
  HOWARD AROUND 1055 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 4400 9782 4413 9779 4411 9741 4389 9749
TIME...MOT...LOC 0335Z 278DEG 18KT 4401 9766 

TORNADO...OBSERVED
HAIL...1.00IN

$$

HANKO

587 
WWUS53 KFSD 240354
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1054 PM CDT THU JUL 23 2015

SDC097-240415-
/O.CON.KFSD.TO.W.0021.000000T0000Z-150724T0415Z/
MINER SD-
1054 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR CENTRAL
MINER COUNTY...
    
AT 1053 PM CDT...A CONFIRMED TORNADO WAS LOCATED OVER VILAS...OR 21
MILES WEST OF LAKE HERMAN STATE PARK...MOVING EAST AT 10 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. AT 1050 PM CDT A 
TORNADO WAS REPORTED ON THE GROUND 1 TO 2 MILES NORTHWEST OF VILAS.

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...
  HOWARD AROUND 1110 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 4400 9771 4410 9769 4411 9741 4389 9749
TIME...MOT...LOC 0353Z 279DEG 9KT 4401 9759 

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, 9:45 PM CDT	Tornado Warning	FSD	Kingsbury, Miner, Sanborn	45 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.