Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 32, NWS Sioux Falls, SD

June 20, 2011Jackson County, Nobles County, Minnesota; Dickinson County, Osceola County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Jun 20, 2011, 10:38 PM CDT for Jackson County, Nobles County, Minnesota; Dickinson County, Osceola County, Iowa. It was in force for 37 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
Jun 20, 2011, 10:38 PM CDT (03:38 UTC)
Expired
Jun 20, 2011, 11:15 PM CDT
In force
37 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

Counties Dickinson County, IA, Osceola County, IA, Jackson County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 101 km from the middle of the area, began a volume at 03:39 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
Jun 20, 10:45 PM CDTTSTM WND DMG8 E Melvin, IAMACHINE SHED ROOF DAMAGE ON WHITE AVE AS WELL AS TREES DOWN ON HOUSES AND ACROSS ROADS
Jun 20, 10:50 PM CDTTSTM WND DMG2 W Harris, IA3 STALL GARAGE MOVED OFF FOUNDATION
Jun 20, 10:50 PM CDTNON-TSTM WND DMG2 W Harris, IA3 STALL GARAGE MOVED OFF FOUNDATION
Jun 20, 11:00 PM CDTTSTM WND DMGRound Lake, MNBENT METAL FLAG POLE
Jun 20, 11:00 PM CDTNON-TSTM WND DMGRound Lake, MNBENT METAL FLAG POLE

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
Jun 20, 6:53 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.6 hours before the alert went out and 218 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, Minneapolis, MN at 00:00Z on 2011-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Minneapolis, MN at 00:00Z on 2011-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
104 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.

118 
WFUS53 KFSD 210338
TORFSD
IAC059-143-MNC063-105-210415-
/O.NEW.KFSD.TO.W.0032.110621T0338Z-110621T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1038 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN DICKINSON COUNTY IN NORTHWEST IOWA...
  EASTERN OSCEOLA COUNTY IN NORTHWEST IOWA...
  SOUTHWESTERN JACKSON COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHEASTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 1115 PM CDT

* AT 1038 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED 6 MILES NORTH OF HARTLEY...OR 17 MILES
  NORTHWEST OF SPENCER...AND MOVING NORTH AT 45 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  HARRIS...OCHEYEDAN AROUND 1050 PM CDT...  
  ROUND LAKE AROUND 1100 PM CDT...

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 4325 9539 4330 9567 4361 9572 4361 9550
      4358 9527
TIME...MOT...LOC 0338Z 181DEG 38KT 4331 9546

$$

LIEBL
1 follow-up statement
899 
WWUS53 KFSD 210353
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1053 PM CDT MON JUN 20 2011

IAC059-143-MNC063-105-210415-
/O.CON.KFSD.TO.W.0032.000000T0000Z-110621T0415Z/
OSCEOLA IA-DICKINSON IA-JACKSON MN-NOBLES MN-
1053 PM CDT MON JUN 20 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN NOBLES...
SOUTHWESTERN JACKSON...NORTHWESTERN DICKINSON AND NORTHEASTERN
OSCEOLA COUNTIES UNTIL 1115 PM CDT...

AT 1053 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
DANGEROUS STORM WAS LOCATED NEAR OCHEYEDAN...OR 14 MILES SOUTHEAST OF
WORTHINGTON...MOVING NORTH AT 45 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  ROUND LAKE AROUND 1100 PM CDT...

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.

TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 4351 9529 4342 9533 4339 9548 4344 9569
      4361 9572 4361 9550 4358 9527
TIME...MOT...LOC 0353Z 181DEG 38KT 4349 9549

$$

LIEBL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 10:46 PM CDTSevere Thunderstorm WarningFSDJackson, Nobles, Rock29 min
Jun 20, 11:00 PM CDTTornado WarningFSDPipestone, Rock30 min
Jun 20, 11:13 PM CDTSevere Thunderstorm WarningFSDCottonwood, Jackson, Murray, Nobles, Pipestone, Rock47 min
Jun 20, 11:15 PM CDTTornado WarningFSDMurray, Pipestone, Rock30 min
Jun 21, 12:55 AM CDTRiver Flood WarningFSDJackson12 days
Jun 21, 2:06 PM CDTRiver Flood WarningFSDCottonwood, Jackson12 days
Jun 20, 9:12 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury33 min
Jun 20, 9:18 PM CDTFlash Flood WarningFSDPlymouth, Sioux, Woodbury2 hr
Jun 20, 9:34 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 1 more41 min
Jun 20, 9:37 PM CDTTornado WarningFSDPlymouth23 min
Jun 20, 9:39 PM CDTFlash Flood WarningFSDLyon, Sioux3 hr
Jun 20, 10:14 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson, Lyon, O'Brien, Osceola, Sioux46 min
Jun 20, 10:20 PM CDTSevere Thunderstorm WarningFSDBuena Vista40 min
Jun 20, 10:22 PM CDTTornado WarningFSDClay, Dickinson, O'Brien, Osceola23 min
Jun 21, 12:55 AM CDTRiver Flood WarningFSDClay, Dickinson9 days
Jun 21, 12:55 AM CDTRiver Flood WarningFSDCherokee11 days
Jun 21, 12:55 AM CDTRiver Flood WarningFSDLyon5 days
Jun 21, 12:55 AM CDTRiver Flood WarningFSDClay6 days
Jun 21, 6:34 AM CDTRiver Flood WarningFSDLyon14 hr
Jun 21, 6:34 AM CDTRiver Flood WarningFSDO'Brien30 hr
Jun 21, 6:34 AM CDTRiver Flood WarningFSDSioux30 hr

Nearby

Tornado Warnings in Minnesota, 2011Tornado Warnings in Iowa, 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.