Alert archive / Minnesota / Tornado Warnings in 2007

Tornado Warning 21, NWS Twin Cities, MN

June 20, 2007Carver County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 20, 2007, 6:24 PM CDT for Carver County, Minnesota. It was in force for 51 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 20, 2007, 6:24 PM CDT (23:24 UTC)
Expired
Jun 20, 2007, 7:15 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Carver County, MN

The radar

The Minneapolis radar (KMPX), 27 km from the middle of the area, began a volume at 23:26 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, 6:40 PM CDTHAIL 1Waconia, MN

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, 4:22 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.4 hours before the alert went out and 355 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 12:00Z on 2007-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 952 joules per kilogram.LCLLFCEL10008507005003002001001 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, Aberdeen, SD at 12:00Z on 2007-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
952 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1187 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.5

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KMPX 202324
TORMPX
MNC019-210015-
/O.NEW.KMPX.TO.W.0021.070620T2324Z-070621T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
624 PM CDT WED JUN 20 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CARVER COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 715 PM CDT

* AT 622 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG
  ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS 7 MILES NORTH OF
  NEW GERMANY...OR ABOUT OVER WINSTED...AND MOVING SOUTHEAST AT 30
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEW GERMANY...
  MAYER...
  WACONIA...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

LAT...LON 4498 9388 4497 9401 4484 9398 4483 9371

$$

KAT
2 follow-up statements
000 
WWUS53 KMPX 202336
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
635 PM CDT WED JUN 20 2007

MNC019-210015-
/O.CON.KMPX.TO.W.0021.000000T0000Z-070621T0015Z/
CARVER MN-
635 PM CDT WED JUN 20 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR CARVER
COUNTY...

AT 635 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM WITH STRONG ROTATION.   THE SEVERE THUNDERSTORM WAS 
LOCATED NEAR MAYER AND MOVING SOUTHEAST AT 35 MPH.

IN ADDITION TO THE TORNADO...VERY LARGE HAIL...SOME TO THE SIZE OF 
BASEBALLS...ARE POSSIBLE...ALONG WITH DAMAGING WINDS TO 65 MPH. TAKE 
COVER IMMEDIATELY IF YOU ARE IN THE PATH OF THIS STORM

OTHER LOCATIONS IN THE WARNING INCLUDE WATERTOWN...WACONIA AND MAYER.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

LAT...LON 4497 9385 4497 9399 4483 9391 4483 9371

$$

KAT
000 
WWUS53 KMPX 202351
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
651 PM CDT WED JUN 20 2007

MNC019-210015-
/O.CON.KMPX.TO.W.0021.000000T0000Z-070621T0015Z/
CARVER MN-
651 PM CDT WED JUN 20 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR CARVER
COUNTY...

AT 647 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.   THE SEVERE 
THUNDERSTORM WAS LOCATED NEAR WACONIA AND MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WACONIA AND COLOGNE.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

LAT...LON 4489 9376 4487 9384 4471 9378 4477 9362

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 4:06 PM CDTSevere Thunderstorm WarningMPXPope, Stearns54 min
Jun 20, 4:40 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti32 min
Jun 20, 4:52 PM CDTSevere Thunderstorm WarningMPXStearns53 min
Jun 20, 4:55 PM CDTSevere Thunderstorm WarningMPXChisago34 min
Jun 20, 5:16 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne59 min
Jun 20, 5:24 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright66 min
Jun 20, 5:32 PM CDTSevere Thunderstorm WarningMPXMille Lacs43 min
Jun 20, 5:52 PM CDTSevere Thunderstorm WarningMPXIsanti53 min
Jun 20, 6:09 PM CDTTornado WarningMPXWright36 min
Jun 20, 6:11 PM CDTSevere Thunderstorm WarningMPXMille Lacs, Sherburne34 min
Jun 20, 6:16 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod59 min
Jun 20, 6:21 PM CDTSevere Thunderstorm WarningMPXChisago54 min
Jun 20, 6:28 PM CDTSevere Thunderstorm WarningMPXHennepin62 min
Jun 20, 6:47 PM CDTSevere Thunderstorm WarningMPXWright26 min
Jun 20, 6:57 PM CDTSevere Thunderstorm WarningMPXScott63 min

Nearby

Tornado Warnings in Minnesota, 2007Every tornado warning in 2007Tornadoes in 2007

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.