Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 25, NWS Twin Cities, MN

June 21, 2011Dakota County, Goodhue County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 21, 2011, 1:46 PM CDT for Dakota County, Goodhue County, Minnesota. It was in force for 29 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
Jun 21, 2011, 1:46 PM CDT (18:46 UTC)
Expired
Jun 21, 2011, 2:15 PM CDT
In force
29 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Dakota County, MN, Goodhue County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 18:49 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 21, 1:56 PM CDTFUNNEL CLOUDHampton, MNAT HWY 52 AND COUNTY ROAD 50

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.8 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 2011-06-21Temperature 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 2011-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
629 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
260 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.

092 
WFUS53 KMPX 211846
TORMPX
MNC037-049-211915-
/O.NEW.KMPX.TO.W.0025.110621T1846Z-110621T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
146 PM CDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 215 PM CDT

* AT 144 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 3 MILES NORTHWEST
  OF CANNON FALLS...AND MOVING NORTHWEST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  CANNON FALLS...
  NEW TRIER...
  RANDOLPH...
  HAMPTON...
  VERMILLION...
  COATES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

&&

LAT...LON 4472 9322 4477 9295 4451 9283 4447 9297
TIME...MOT...LOC 1847Z 154DEG 29KT 4456 9297

$$

CLF
1 follow-up statement
693 
WWUS53 KMPX 211904
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
204 PM CDT TUE JUN 21 2011

MNC049-211918-
/O.CAN.KMPX.TO.W.0025.000000T0000Z-110621T1915Z/
GOODHUE MN-
204 PM CDT TUE JUN 21 2011

...THE TORNADO WARNING FOR WEST CENTRAL GOODHUE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4460 9287 4456 9305 4472 9322 4477 9295
TIME...MOT...LOC 1903Z 154DEG 29KT 4468 9305

$$

MNC037-211915-
/O.CON.KMPX.TO.W.0025.000000T0000Z-110621T1915Z/
DAKOTA MN-
204 PM CDT TUE JUN 21 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL DAKOTA COUNTY
UNTIL 215 PM CDT...

AT 158 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS STORM
WAS LOCATED NEAR HAMPTON...OR 21 MILES WEST OF RED WING...MOVING 
NORTHWEST AT 35 MPH. A FUNNEL CLOUD WAS REPORTED AT HAMPTON AT 156 
PM CDT.

LOCATIONS IMPACTED INCLUDE...
  COATES.

LAT...LON 4460 9287 4456 9305 4472 9322 4477 9295
TIME...MOT...LOC 1903Z 154DEG 29KT 4468 9305

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 9:58 PM CDTRiver Flood WatchMPXChippewa, Lac qui Parle, Yellow Medicine47 hr
Jun 20, 9:58 PM CDTRiver Flood WatchMPXLe Sueur, Scott, Sibley24 hr
Jun 20, 9:58 PM CDTRiver Flood WatchMPXCarver66 hr
Jun 20, 10:09 PM CDTRiver Flood WarningMPXRedwood70 hr
Jun 20, 11:11 PM CDTSpecial Weather StatementMPXMartin49 min
Jun 20, 11:57 PM CDTSpecial Weather StatementMPXBlue Earth, Faribault, Martin48 min
Jun 21, 12:32 AM CDTSpecial Weather StatementMPXFaribault, Freeborn, Steele, Waseca58 min
Jun 21, 2:08 AM CDTSpecial Weather StatementMPXRice52 min
Jun 21, 3:19 AM CDTAreal Flood AdvisoryMPXDakota, Goodhue, Hennepin, Ramsey, Washington105 min
Jun 21, 11:15 AM CDTRiver Flood WarningMPXLe Sueur, Scott, Sibley72 hr
Jun 21, 11:15 AM CDTRiver Flood WarningMPXDakota, Hennepin, Scott13 days
Jun 21, 1:50 PM CDTTornado WarningMPXKandiyohi25 min
Jun 21, 2:21 PM CDTTornado WarningMPXDakota, Washington24 min
Jun 21, 3:13 PM CDTTornado WarningMPXAnoka, Hennepin, Ramsey32 min
Jun 21, 4:42 PM CDTAreal Flood AdvisoryMPXBenton, Sherburne, Stearns, Wright3 hr

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.