Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 21, NWS Twin Cities, MN

May 28, 2011Carver County, Scott County, Sibley County, Minnesota

NWS Twin Cities, MN issued this tornado warning at May 28, 2011, 2:39 PM CDT for Carver County, Scott County, Sibley County, Minnesota. It was in force for 36 min. 3 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 28, 2011, 2:39 PM CDT (19:39 UTC)
Expired
May 28, 2011, 3:15 PM CDT
In force
36 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Carver County, MN, Scott County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 53 km from the middle of the area, began a volume at 19:38 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 28, 3:02 PM CDTHAIL 1Arlington, MN
May 28, 3:16 PM CDTHAIL 0.755 Sw Belle Plaine, MNREPORTED NEAR COUNTY ROADS 1 AND 169.
May 28, 3:19 PM CDTHAIL 15 Sw Belle Plaine, MNREPORTED NEAR COUNTY ROADS 1 AND 169.

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 28, 2:11 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 50 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 12:00Z on 2011-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2011-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.1939587897117136156Sfc1 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
918 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
172 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.

551 
WFUS53 KMPX 281939
TORMPX
MNC019-139-143-282015-
/O.NEW.KMPX.TO.W.0021.110528T1939Z-110528T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
239 PM CDT SAT MAY 28 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHWESTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 315 PM CDT

* AT 234 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO NEAR
  GAYLORD...OR ABOUT 6 MILES EAST OF WINTHROP. RADAR SHOWED THE
  TORNADIC STORM MOVING EAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ARLINGTON...
  GREEN ISLE...
  NEW ROME...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 4463 9434 4463 9426 4467 9425 4475 9384
      4457 9376 4448 9427
TIME...MOT...LOC 1939Z 255DEG 29KT 4457 9420

$$
1 follow-up statement
251 
WWUS53 KMPX 281955
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
255 PM CDT SAT MAY 28 2011

MNC019-139-143-282015-
/O.CON.KMPX.TO.W.0021.000000T0000Z-110528T2015Z/
CARVER MN-SCOTT MN-SIBLEY MN-
255 PM CDT SAT MAY 28 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN SIBLEY...
SOUTHWESTERN SCOTT AND SOUTHWESTERN CARVER COUNTIES UNTIL 315 PM
CDT...

AT 252 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS STORM 
WAS LOCATED 5 MILES EAST OF GAYLORD...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  ARLINGTON AND NEW ROME.

LAT...LON 4463 9434 4463 9426 4467 9425 4475 9384
      4457 9376 4448 9427
TIME...MOT...LOC 1954Z 263DEG 30KT 4455 9409

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 1:56 PM CDTSevere Thunderstorm WarningMPXNicollet, Redwood, Sibley7 min
May 28, 2:00 PM CDTSevere Thunderstorm WarningMPXBrown, Nicollet, Redwood, Renville, Sibley34 min
May 28, 2:16 PM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Le Sueur, McLeod, Rice, Scott and 1 more44 min
May 28, 3:06 PM CDTTornado WarningMPXCarver, Le Sueur, Rice, Scott, Sibley39 min
May 28, 3:45 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice, Scott45 min
May 28, 3:57 PM CDTTornado WarningMPXDakota, Goodhue, Rice, Scott33 min
May 28, 4:27 PM CDTSpecial Weather StatementMPXDakota48 min
May 28, 4:35 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue40 min
May 28, 4:43 PM CDTSpecial Weather StatementMPXKanabec, Mille Lacs47 min
May 28, 6:18 PM CDTSpecial Weather StatementMPXRice42 min

Nearby

Tornado Warnings in Minnesota, 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.