Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 27, NWS Sioux Falls, SD

May 30, 2011Lake County, McCook County, Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 30, 2011, 8:05 PM CDT for Lake County, McCook County, Minnehaha County, South Dakota. It was in force for 25 min. 5 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
May 30, 2011, 8:05 PM CDT (01:05 UTC)
Expired
May 30, 2011, 8:30 PM CDT
In force
25 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

Counties Lake County, SD, McCook County, SD, Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 50 km from the middle of the area, began a volume at 01:07 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

TimeReportWhereRemark
May 30, 8:08 PM CDTTSTM WND DMGSalem, SDPOWERLINES DOWN AND POWER OUT IN SALEM
May 30, 8:10 PM CDTTSTM WND DMG4 Ene Salem, SDFARM DAMAGED. SILO DAMAGED. GRAIN BINS DAMAGED. MACHINE SHED DAMAGED.
May 30, 8:22 PM CDTTORNADO1 S Ramona, SD
May 30, 8:40 PM CDTTSTM WND DMGMadison, SDTREES DOWN AND POWER OUTAGE
May 30, 8:40 PM CDTTSTM WND GST 654 Se Madison, SD

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.

IssuedProductOfficeLasted
May 30, 2:08 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.1 hours before the alert went out and 150 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2011-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1125 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2011-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1125 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
775 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.0

Open this sounding in Storm Lab

The text

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

900 
WFUS53 KFSD 310105
TORFSD
SDC079-087-099-310130-
/O.NEW.KFSD.TO.W.0027.110531T0105Z-110531T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
805 PM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  EASTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
  NORTHWESTERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA...

* UNTIL 830 PM CDT

* AT 805 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED 6 MILES SOUTH OF SALEM...OR 21 MILES
  NORTHWEST OF PARKER...AND MOVING NORTHEAST AT 60 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  MONTROSE AROUND 815 PM CDT...
  ORLAND AROUND 820 PM CDT...
  LAKE HERMAN STATE PARK AROUND 825 PM CDT...

THIS STORM HAS PRODUCED TORNADOES. PLEASE SEEK SHELTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4384 9690 4352 9734 4379 9744 4385 9739
      4385 9737 4388 9737 4413 9720
TIME...MOT...LOC 0105Z 231DEG 51KT 4366 9737

$$

WEISSER
3 follow-up statements
615 
WWUS53 KFSD 310109
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
809 PM CDT MON MAY 30 2011

SDC079-087-099-310130-
/O.CON.KFSD.TO.W.0027.000000T0000Z-110531T0130Z/
MINNEHAHA SD-MCCOOK SD-LAKE SD-
809 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN LAKE...
EASTERN MCCOOK AND NORTHWESTERN MINNEHAHA COUNTIES UNTIL 830 PM
CDT...

AT 809 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR SALEM...OR 23 MILES NORTHWEST OF PARKER...
MOVING NORTHEAST AT 50 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  SALEM AROUND 810 PM CDT... 
  MONTROSE AROUND 820 PM CDT...
  ORLAND...LAKE HERMAN STATE PARK AND MADISON AROUND 830 PM CDT...

A VERY STRONG CIRCULATION IS MOVING DIRECTLY TOWARDS SALEM. PLEASE 
TAKE COVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4384 9690 4352 9734 4379 9744 4385 9739
      4385 9737 4388 9737 4413 9720
TIME...MOT...LOC 0109Z 223DEG 44KT 4369 9738

$$

WEISSER
544 
WWUS53 KFSD 310112
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
812 PM CDT MON MAY 30 2011

SDC079-087-099-310130-
/O.CON.KFSD.TO.W.0027.000000T0000Z-110531T0130Z/
MINNEHAHA SD-MCCOOK SD-LAKE SD-
812 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN LAKE...
EASTERN MCCOOK AND NORTHWESTERN MINNEHAHA COUNTIES UNTIL 830 PM
CDT...

AT 811 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR SALEM...OR 23 MILES NORTHWEST OF PARKER...
MOVING NORTHEAST AT 50 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  SALEM AROUND 815 PM CDT... 
  MONTROSE AROUND 820 PM CDT...
  ORLAND AROUND 825 PM CDT...
  LAKE HERMAN STATE PARK AND MADISON AROUND 830 PM CDT...

AT 804 PM CDT...EMERGENCY MANAGER REPORTED A 73 MPH WIND GUSTS 3 
MILES SOUTH OF SALEM.

TREE DAMAGE WAS ALSO REPORTED IN BRIDGEWATER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4384 9690 4352 9734 4379 9744 4385 9739
      4385 9737 4388 9737 4413 9720
TIME...MOT...LOC 0111Z 223DEG 44KT 4371 9735

$$

WEISSER
878 
WWUS53 KFSD 310135
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
835 PM CDT MON MAY 30 2011

SDC079-087-099-310145-
/O.EXP.KFSD.TO.W.0027.000000T0000Z-110531T0130Z/
MINNEHAHA SD-MCCOOK SD-LAKE SD-
835 PM CDT MON MAY 30 2011

...THE TORNADO WARNING FOR SOUTHWESTERN LAKE...EASTERN MCCOOK AND
NORTHWESTERN MINNEHAHA COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4384 9690 4352 9734 4379 9744 4385 9739
      4385 9737 4388 9737 4413 9720
TIME...MOT...LOC 0112Z 223DEG 44KT 4372 9733

$$

WEISSER

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:05 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix, Douglas, Hutchinson40 min
May 30, 7:21 PM CDTTornado WarningFSDDouglas, Hutchinson24 min
May 30, 7:29 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix, Hutchinson46 min
May 30, 7:42 PM CDTTornado WarningFSDHanson, Hutchinson, McCook33 min
May 30, 8:09 PM CDTTornado WarningFSDBrookings, Kingsbury, Lake, Miner51 min
May 30, 8:46 PM CDTSevere Thunderstorm WarningFSDBrookings, Lake, Moody44 min
May 31, 3:48 AM CDTWind AdvisoryFSDAurora, Beadle, Brookings, Brule, Davison, Hanson and 8 more15 hr
May 31, 10:10 AM CDTRiver Flood WarningFSDUnion86 days
May 31, 10:41 AM CDTRiver Flood WarningFSDTurner24 hr
May 31, 10:41 AM CDTRiver Flood WarningFSDClay24 hr

Nearby

Tornado Warnings in South Dakota, 2011Every tornado warning in 2011Tornadoes in 2011

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.