Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 6, NWS Sioux Falls, SD

May 10, 2015Davison County, Douglas County, Hutchinson County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 10, 2015, 10:55 AM CDT for Davison County, Douglas County, Hutchinson County, South Dakota. It was in force for 35 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: May 10, 2015, 10:55 AM CDT (15:55 UTC)
Expired: May 10, 2015, 11:30 AM CDT
In force: 35 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Observed
Hail: 1.25 in

Counties Davison County, SD, Douglas County, SD, Hutchinson County, SD

The radar

The Sioux Falls radar (KFSD), 114 km from the middle of the area, began a volume at 15:55 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
May 10, 11:15 AM CDT	TORNADO	4 Wnw Dimock, SD	TORNADO ON THE GROUND.

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
May 10, 10:46 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 3.9 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 483 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 692 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

884 
WFUS53 KFSD 101555
TORFSD
SDC035-043-067-101630-
/O.NEW.KFSD.TO.W.0006.150510T1555Z-150510T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1055 AM CDT SUN MAY 10 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DOUGLAS COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  SOUTH CENTRAL DAVISON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
  NORTHWESTERN HUTCHINSON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 1130 AM CDT

* AT 1054 AM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR DELMONT...OR 
  8 MILES WEST OF PARKSTON...MOVING NORTH AT 25 MPH. DAMAGE WAS 
  REPORTED IN DELMONT.

  HAZARD...DAMAGING TORNADO AND HALF DOLLAR SIZE HAIL. 

  SOURCE...EMERGENCY MANAGER CONFIRMED TORNADO. 

  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
  NORTHEASTERN DOUGLAS...SOUTH CENTRAL DAVISON AND NORTHWESTERN
  HUTCHINSON COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4331 9811 4332 9820 4355 9819 4354 9802
TIME...MOT...LOC 1554Z 189DEG 20KT 4335 9815 

TORNADO...OBSERVED
HAIL...1.25IN

$$

WILLIAMS

2 follow-up statements

140 
WWUS53 KFSD 101603
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1103 AM CDT SUN MAY 10 2015

SDC035-043-067-101630-
/O.CON.KFSD.TO.W.0006.000000T0000Z-150510T1630Z/
DOUGLAS SD-DAVISON SD-HUTCHINSON SD-
1103 AM CDT SUN MAY 10 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
NORTHEASTERN DOUGLAS...SOUTH CENTRAL DAVISON AND NORTHWESTERN
HUTCHINSON COUNTIES...
    
AT 1058 AM CDT...A CONFIRMED TORNADO WAS LOCATED 7 MILES WEST OF 
PARKSTON...MOVING NORTH AT 25 MPH.

HAZARD...DAMAGING TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. 

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
NORTHEASTERN DOUGLAS...SOUTH CENTRAL DAVISON AND NORTHWESTERN
HUTCHINSON COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4331 9811 4332 9820 4355 9819 4354 9802
TIME...MOT...LOC 1602Z 189DEG 20KT 4340 9814 

TORNADO...OBSERVED
HAIL...1.25IN

$$

BT

681 
WWUS53 KFSD 101634
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1134 AM CDT SUN MAY 10 2015

SDC035-043-067-101643-
/O.EXP.KFSD.TO.W.0006.000000T0000Z-150510T1630Z/
DOUGLAS SD-DAVISON SD-HUTCHINSON SD-
1134 AM CDT SUN MAY 10 2015

...THE TORNADO WARNING FOR NORTHEASTERN DOUGLAS...SOUTH CENTRAL
DAVISON AND NORTHWESTERN HUTCHINSON COUNTIES HAS EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA. 
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. A TORNADO WARNING 
STILL REMAINS IN EFFECT FOR PORTIONS OF DAVISON...HUTCHINSONAND 
HANSON COUNTIES.

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

LAT...LON 4331 9811 4332 9820 4355 9819 4354 9802
TIME...MOT...LOC 1632Z 189DEG 20KT 4340 9814 

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:54 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	36 min
May 10, 10:16 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Hutchinson	29 min
May 10, 10:29 AM CDT	Tornado Warning Tornado observed	FSD	Charles Mix, Douglas, Hutchinson	31 min
May 10, 11:23 AM CDT	Tornado Warning	FSD	Davison, Hanson, Hutchinson	37 min
May 10, 11:55 AM CDT	Tornado Warning	FSD	Davison, Hanson, Sanborn	35 min
May 10, 12:27 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	33 min
May 10, 12:28 PM CDT	Tornado Warning	FSD	Davison, Hanson, Miner, Sanborn	32 min
May 10, 1:40 PM CDT	Severe Thunderstorm Warning	FSD	Union	35 min
May 10, 1:57 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Turner	33 min
May 10, 2:02 PM CDT	Severe Thunderstorm Warning	FSD	Union	28 min
May 10, 2:51 PM CDT	Tornado Warning	FSD	Lincoln, Union	24 min
May 10, 3:15 PM CDT	Severe Thunderstorm Warning	FSD	Union	30 min
May 10, 3:27 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	33 min
May 10, 4:34 PM CDT	Flash Flood Warning	FSD	Lincoln	4 hr
May 10, 4:56 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Sanborn	34 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.