Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 70, NWS Twin Cities, MN

June 7, 2007Dunn County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 7, 2007, 12:19 PM CDT for Dunn County, Saint Croix County, Wisconsin. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 7, 2007, 12:19 PM CDT (17:19 UTC)
Expired
Jun 7, 2007, 1:00 PM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Dunn County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 115 km from the middle of the area, began a volume at 17:21 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 7, 11:34 AM CDTTornado Watch PDSSPC10 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 5.3 hours before the alert went out and 118 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 2007-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 72 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, Minneapolis, MN at 12:00Z on 2007-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897Sfc1 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
72 J/kg
Mixed-layer CIN
-470 J/kg
Mixed-layer LCL
1082 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 071720
SVRMPX
WIC033-109-071800-
/O.NEW.KMPX.SV.W.0070.070607T1719Z-070607T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1219 PM CDT THU JUN 7 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 100 PM CDT

* AT 1217 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...  
  CAPABLE OF PRODUCING GOLF BALL SIZE HAIL AND DAMAGING WINDS IN     
  EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 20 MILES SOUTHWEST OF    
  BOYCEVILLE...OR ABOUT 12 MILES EAST OF ELLSWORTH...AND MOVING      
  NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOYCEVILLE...
  INTERSTATE 94 BETWEEN BALDWIN AND MENOMONIE...

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 4486 9234 4486 9214 4475 9214 4493 9191
      4506 9187 4507 9198 4504 9214

$$
2 follow-up statements
000 
WWUS53 KMPX 071734
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1234 PM CDT THU JUN 7 2007

WIC033-109-071800-
/O.CON.KMPX.SV.W.0070.000000T0000Z-070607T1800Z/
ST. CROIX WI-DUNN WI-
1234 PM CDT THU JUN 7 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR DUNN AND ST. CROIX COUNTIES...

AT 1229 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING HAIL TO THE SIZE OF 
NICKELS...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED 6 MILES SOUTH OF KNAPP...OR ABOUT 6 MILES EAST OF SPRING 
VALLEY...AND MOVING NORTHEAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WHEELER...KNAPP AND 
BOYCEVILLE. THIS INCLUDES INTERSTATE 94 BETWEEN THE DUNN AND SAINT 
CROIX COUNTY LINE AND MENOMONIE.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4486 9224 4486 9214 4476 9214 4490 9192
      4506 9187 4507 9198 4503 9210

$$
000 
WWUS53 KMPX 071743
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1243 PM CDT THU JUN 7 2007

WIC109-071753-
/O.CAN.KMPX.SV.W.0070.000000T0000Z-070607T1800Z/
ST. CROIX WI-
1243 PM CDT THU JUN 7 2007

...THE SEVERE THUNDERSTORM WARNING FOR ST. CROIX COUNTY IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING 
FOR WEST CENTRAL WISCONSIN.

LAT...LON 4503 9207 4487 9213 4484 9212 4490 9192
      4494 9178 4502 9175 4512 9185 4507 9198

$$

WIC033-071800-
/O.CON.KMPX.SV.W.0070.000000T0000Z-070607T1800Z/
DUNN WI-
1243 PM CDT THU JUN 7 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR DUNN COUNTY...

AT 1242 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING GOLF BALL SIZE HAIL AND DAMAGING WINDS IN 
EXCESS OF 60 MPH. THIS STORM WAS LOCATED 4 MILES SOUTHEAST OF 
KNAPP...OR ABOUT 10 MILES SOUTH OF BOYCEVILLE...AND MOVING NORTHEAST 
AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WHEELER...TAINTER LAKE AND 
KNAPP. INTERSTATE 94 JUST WEST OF MENOMONIE IS ALSO AFFECTED BY THIS 
SEVERE THUNDERSTORM.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4503 9207 4487 9213 4484 9212 4490 9192
      4494 9178 4502 9175 4512 9185 4507 9198

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 3:26 AM CDTSevere Thunderstorm WarningMPXSaint Croix34 min
Jun 7, 3:47 AM CDTSevere Thunderstorm WarningMPXBarron, Polk43 min
Jun 7, 3:56 AM CDTSevere Thunderstorm WarningMPXDunn34 min
Jun 7, 4:14 AM CDTWind AdvisoryMPXBarron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more17 hr
Jun 7, 4:35 AM CDTSevere Thunderstorm WarningMPXRusk40 min
Jun 7, 11:33 AM CDTSevere Thunderstorm WarningMPXPierce57 min
Jun 7, 11:45 AM CDTTornado WarningMPXPierce45 min
Jun 7, 12:48 PM CDTTornado WarningMPXChippewa, Dunn42 min
Jun 7, 1:11 PM CDTSevere Thunderstorm WarningMPXBarron25 min
Jun 7, 1:24 PM CDTTornado WarningMPXChippewa, Rusk51 min
Jun 7, 1:56 PM CDTTornado WarningMPXEau Claire34 min
Jun 7, 2:25 PM CDTTornado WarningMPXEau Claire22 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.