Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 128, NWS Twin Cities, MN

June 20, 2007Carver County, McLeod County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 2007, 6:16 PM CDT for Carver County, McLeod County, Minnesota. It was in force for 59 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
Jun 20, 2007, 6:16 PM CDT (23:16 UTC)
Expired
Jun 20, 2007, 7:15 PM CDT
In force
59 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Carver County, MN, McLeod County, MN

The radar

The Minneapolis radar (KMPX), 25 km from the middle of the area, began a volume at 23:18 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, 6:22 PM CDTHAIL 0.753 E Winsted, MNWINDOWS BROKEN
Jun 20, 6:33 PM CDTHAIL 1.75Watertown, MN
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, 11.3 hours before the alert went out and 356 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°0°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 
WUUS53 KMPX 202316
SVRMPX
MNC019-085-210015-
/O.NEW.KMPX.SV.W.0128.070620T2316Z-070621T0015Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  CARVER COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 715 PM CDT

* AT 614 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  CAPABLE OF PRODUCING BASEBALL SIZE HAIL AND 65 MPH WINDS.          
  THIS STORM WAS LOCATED 5 MILES NORTHEAST OF WINSTED...OR ABOUT     
  21 MILES NORTHEAST OF HUTCHINSON...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LESTER PRAIRIE...
  NORWOOD/YOUNG AMERICA...
  WACONIA...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE 
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4497 9378 4498 9420 4473 9407 4472 9369
      4489 9377

$$

KAT
1 follow-up statement
000 
WWUS53 KMPX 202340
SVSMPX

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

MNC085-202349-
/O.CAN.KMPX.SV.W.0128.000000T0000Z-070621T0015Z/
MCLEOD MN-
639 PM CDT WED JUN 20 2007

...THE SEVERE THUNDERSTORM WARNING FOR MCLEOD COUNTY IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE SEVERE THUNDERSTORM 
WARNING FOR MCLEOD COUNTY HAS MOVED EAST OF THE COUNTY. ADDITIONAL 
THUNDERSTORMS WERE IN THE AREA...SO REMAIN ALERT FOR ADDITIONAL 
WARNINGS.

LAT...LON 4497 9378 4497 9398 4473 9394 4472 9366
      4479 9362 4483 9354 4489 9355 4489 9377

$$

MNC019-210015-
/O.CON.KMPX.SV.W.0128.000000T0000Z-070621T0015Z/
CARVER MN-
639 PM CDT WED JUN 20 2007

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

AT 633 PM CDT...BASEBALL SIZE HAIL WAS REPORTED IN WATERTOWN WITH 
THIS STORM.

AT 635 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING HAIL TO AT LEAST THE SIZE OF 
BASEBALLS AND 65 MPH WINDS.  THIS STORM WAS LOCATED 3 MILES 
SOUTHEAST OF WATERTOWN...OR ABOUT 7 MILES NORTH OF WACONIA...AND 
MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WATERTOWN...WACONIA...
VICTORIA...NORWOOD/YOUNG AMERICA...MAYER...COLOGNE...CHASKA...
CHANHASSEN AND CARVER.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 4497 9378 4497 9398 4473 9394 4472 9366
      4479 9362 4483 9354 4489 9355 4489 9377

$$

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, 6:21 PM CDTSevere Thunderstorm WarningMPXChisago54 min
Jun 20, 6:24 PM CDTTornado WarningMPXCarver51 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

Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning 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.