Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 26, NWS Twin Cities, MN

April 30, 2007Carver County, Hennepin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 30, 2007, 7:50 PM CDT for Carver County, Hennepin County, Minnesota. It was in force for 25 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
Apr 30, 2007, 7:50 PM CDT (00:50 UTC)
Expired
Apr 30, 2007, 8:15 PM CDT
In force
25 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Carver County, MN, Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 22 km from the middle of the area, began a volume at 00:51 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
Apr 30, 7:59 PM CDTHAIL 0.88Waconia, MNONE HALF MILE SOUTH OF HIGHWAY 5.

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 00:00Z, 0.8 hours before the alert went out and 19 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 2007-05-01Temperature 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 00:00Z on 2007-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
1551 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
305 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 010050
SVRMPX
MNC019-053-010115-
/O.NEW.KMPX.SV.W.0026.070501T0050Z-070501T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
750 PM CDT MON APR 30 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 747 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED 6   
  MILES NORTHWEST OF NORWOOD/YOUNG   AMERICA...OR ABOUT 18 MILES     
  EAST  OF HUTCHINSON...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NORWOOD/YOUNG AMERICA...
  WACONIA...
  CHASKA...
  CHANHASSEN...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4492 9402 4473 9398 4474 9364 4489 9353

$$
3 follow-up statements
000 
WUUS53 KMPX 010053 CCA
SVRMPX
MNC019-010115-
/O.COR.KMPX.SV.W.0026.070501T0050Z-070501T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
750 PM CDT MON APR 30 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 747 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM WAS LOCATED 6    
  MILES NORTHWEST OF   NORWOOD/YOUNG AMERICA...OR ABOUT 19 MILES     
  EAST OF HUTCHINSON...AND   MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NORWOOD/YOUNG AMERICA...
  WACONIA...
  CHASKA...
  CHANHASSEN...


LAT...LON 4492 9402 4473 9398 4474 9364 4489 9353
      4489 9381

$$
000 
WWUS53 KMPX 010103
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
801 PM CDT MON APR 30 2007

MNC019-010115-
/O.CON.KMPX.SV.W.0026.000000T0000Z-070501T0115Z/
CARVER MN-
801 PM CDT MON APR 30 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR CARVER COUNTY...

AT 758 PM CDT...NICKEL SIZE HAIL WAS REPORTED ONE HALF MILE SOUTH OF 
WACONIA.

AT 800 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...ABOUT 3 MILES SOUTHWEST OF WACONIA...AND MOVING EAST 
AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WACONIA...VICTORIA...NEW 
GERMANY...MAYER...COLOGNE...CHASKA...CHANHASSEN AND CARVER.

LAT...LON 4492 9402 4473 9398 4474 9364 4489 9353
      4489 9381

$$

JPR
000 
WWUS53 KMPX 010115
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
813 PM CDT MON APR 30 2007

MNC019-010123-
/O.EXP.KMPX.SV.W.0026.000000T0000Z-070501T0115Z/
CARVER MN-
813 PM CDT MON APR 30 2007

...THE SEVERE THUNDERSTORM WARNING FOR CARVER COUNTY EXPIRES AT 815
PM CDT...

THUNDERSTORMS OVER EASTERN CARVER COUNTY HAD WEAKENED...AND WERE 
ABOUT TO MOVE OUT OF MOST OF THE COUNTY. HOWEVER...THUNDERSTORMS 
WERE STILL STRONG AND COULD STILL PRODUCE SMALL HAIL. 

LAT...LON 4492 9402 4473 9398 4474 9364 4489 9353
      4489 9381

$$
JPR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:01 PM CDTSevere Thunderstorm WarningMPXHennepin, Wright44 min
Apr 30, 7:27 PM CDTSevere Thunderstorm WarningMPXMcLeod33 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.