Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 11, NWS Sioux Falls, SD

May 10, 2015Lake County, Miner County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 10, 2015, 7:22 PM CDT for Lake County, Miner 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: May 10, 2015, 7:22 PM CDT (00:22 UTC)
Expired: May 10, 2015, 7:45 PM CDT
In force: 23 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Lake County, SD, Miner County, SD

The radar

The Sioux Falls radar (KFSD), 78 km from the middle of the area, began a volume at 00:23 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.4 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 500 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 664 m²/s²
0-3 km storm-relative helicity: 664 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.

434 
WFUS53 KFSD 110022
TORFSD
SDC079-097-110045-
/O.NEW.KFSD.TO.W.0011.150511T0022Z-150511T0045Z/

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 745 PM CDT
    
* AT 722 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR WINFRED...OR 12 MILES WEST OF LAKE HERMAN
  STATE PARK...MOVING NORTH AT 35 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHWESTERN LAKE AND NORTHEASTERN MINER COUNTIES.

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 4397 9738 4394 9752 4419 9759 4420 9739
      4420 9733
TIME...MOT...LOC 0022Z 175DEG 31KT 4403 9741 

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

$$

WEISSER

2 follow-up statements

751 
WWUS53 KFSD 110033
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
733 PM CDT SUN MAY 10 2015

SDC079-097-110045-
/O.CON.KFSD.TO.W.0011.000000T0000Z-150511T0045Z/
LAKE SD-MINER SD-
733 PM CDT SUN MAY 10 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN LAKE AND NORTHEASTERN MINER COUNTIES...
    
AT 733 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 8 MILES NORTHEAST OF HOWARD...OR 13 MILES SOUTH OF LAKE
THOMPSON STATE RECREATION AREA...MOVING NORTH AT 35 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTHWESTERN LAKE AND NORTHEASTERN MINER COUNTIES.

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 4408 9737 4406 9755 4419 9759 4420 9739
      4420 9733
TIME...MOT...LOC 0033Z 168DEG 31KT 4412 9745 

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

$$

WEISSER

323 
WWUS53 KFSD 110043
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
743 PM CDT SUN MAY 10 2015

SDC079-097-110053-
/O.EXP.KFSD.TO.W.0011.000000T0000Z-150511T0045Z/
LAKE SD-MINER SD-
743 PM CDT SUN MAY 10 2015

...THE TORNADO WARNING FOR NORTHWESTERN LAKE AND NORTHEASTERN MINER
COUNTIES WILL EXPIRE AT 745 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4408 9737 4406 9755 4419 9759 4420 9739
      4420 9733
TIME...MOT...LOC 0042Z 175DEG 31KT 4412 9745 

$$

WEISSER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 2:54 PM CDT	Frost Advisory	FSD	Aurora, Beadle, Brule, Charles Mix, Davison, Douglas and 3 more	17 hr

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.