Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 17, NWS Sioux Falls, SD

July 6, 2015Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 6, 2015, 12:54 AM CDT for Minnehaha County, South Dakota. It was in force for 23 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: Jul 6, 2015, 12:54 AM CDT (05:54 UTC)
Expired: Jul 6, 2015, 1:17 AM CDT
In force: 23 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 14 km from the middle of the area, began a volume at 05:57 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.

Issued	Product	Office	Lasted
Jul 5, 7:42 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.9 hours before the alert went out and 185 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: 1725 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1201 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

595 
WFUS53 KFSD 060554
TORFSD
SDC099-060630-
/O.NEW.KFSD.TO.W.0017.150706T0554Z-150706T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1254 AM CDT MON JUL 6 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MINNEHAHA COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 130 AM CDT
    
* AT 1253 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A 
  TORNADO WAS LOCATED NEAR HARTFORD...OR 11 MILES EAST OF LAKE 
  VERMILLION STATE RECREATION AREA...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...
  CROOKS AROUND 110 AM CDT.
  NORTHERN SIOUX FALLS AROUND 115 AM 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 4362 9700 4366 9700 4368 9671 4359 9673
TIME...MOT...LOC 0553Z 271DEG 21KT 4363 9695 

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

$$

CHAPMAN

2 follow-up statements

283 
WWUS53 KFSD 060607
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
107 AM CDT MON JUL 6 2015

SDC099-060630-
/O.CON.KFSD.TO.W.0017.000000T0000Z-150706T0630Z/
MINNEHAHA SD-
107 AM CDT MON JUL 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR CENTRAL
MINNEHAHA COUNTY...
    
AT 106 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR HARTFORD...OR 9 MILES NORTHWEST OF SIOUX FALLS...
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...
  EXTREME NORTHWEST SIOUX FALLS NEAR I 90 AROUND 130 AM 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 4362 9693 4365 9692 4366 9676 4361 9676
TIME...MOT...LOC 0606Z 271DEG 14KT 4363 9689 

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

$$

CHAPMAN

095 
WWUS53 KFSD 060617
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
117 AM CDT MON JUL 6 2015

SDC099-060627-
/O.CAN.KFSD.TO.W.0017.000000T0000Z-150706T0630Z/
MINNEHAHA SD-
117 AM CDT MON JUL 6 2015

...THE TORNADO WARNING FOR CENTRAL MINNEHAHA COUNTY 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...GUSTY WINDS 
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT FOR
SOUTHEASTERN SOUTH DAKOTA.

LAT...LON 4362 9693 4365 9692 4366 9676 4361 9676
TIME...MOT...LOC 0616Z 271DEG 21KT 4302 9673 

$$

CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 9:02 PM CDT	Flash Flood Watch	FSD	Aurora, Bon Homme, Brookings, Brule, Charles Mix, Clay and 16 more	8 hr
Jul 5, 9:12 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	48 min
Jul 5, 10:00 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	45 min
Jul 5, 11:23 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	37 min
Jul 5, 11:53 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, Hutchinson, McCook	37 min
Jul 6, 12:18 AM CDT	Flash Flood Warning	FSD	Aurora, Davison, Hanson, Hutchinson, McCook	3 hr
Jul 6, 12:20 AM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	25 min
Jul 6, 12:23 AM CDT	Tornado Warning	FSD	McCook, Turner	24 min
Jul 6, 1:11 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Union	49 min
Jul 6, 2:15 AM CDT	Flash Flood Warning	FSD	Lake, McCook, Minnehaha, Moody	3 hr
Jul 6, 9:06 AM CDT	River Flood Warning	FSD	Moody	7 days
Jul 6, 9:06 AM CDT	River Flood Warning	FSD	Minnehaha	58 hr
Jul 6, 1:21 PM CDT	River Flood Warning	FSD	Minnehaha	7 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.