Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 129, NWS Twin Cities, MN

June 20, 2007Polk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 2007, 6:18 PM CDT for Polk County, Wisconsin. It was in force for 57 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 20, 2007, 6:18 PM CDT (23:18 UTC)
Expired
Jun 20, 2007, 7:15 PM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Polk County, WI

The radar

The Minneapolis radar (KMPX), 122 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 20, 2:10 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.3 hours before the alert went out and 341 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, International Fa, MN at 12:00Z on 2007-06-20Temperature 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, International Fa, MN at 12:00Z on 2007-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1400 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
164 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.

000 
WUUS53 KMPX 202318
SVRMPX
WIC095-210015-
/O.NEW.KMPX.SV.W.0129.070620T2318Z-070621T0015Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POLK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 715 PM CDT

* AT 614 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR LUCK...OR ABOUT 9
  MILES NORTH OF BALSAM LAKE...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MCKINLEY...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4566 9251 4552 9261 4537 9217 4564 9216

$$

KAT
2 follow-up statements
000 
WWUS53 KMPX 202353
SVSMPX

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

WIC095-210015-
/O.CON.KMPX.SV.W.0129.000000T0000Z-070621T0015Z/
POLK WI-
653 PM CDT WED JUN 20 2007

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

AT 651 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING BASEBALL SIZE HAIL AND 65 MPH 
WINDS.  THIS STORM WAS LOCATED 5 MILES SOUTHWEST OF CUSHING...OR 
ABOUT 8 MILES NORTHWEST OF ST CROIX FALLS...AND MOVING EAST AT 35 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE RANGE...MCKINLEY...CUSHING...
MILLTOWN...LUCK...CENTURIA AND BALSAM LAKE.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS

LAT...LON 4564 9273 4538 9263 4537 9217 4564 9216

$$

KAT
000 
WWUS53 KMPX 210002
SVSMPX

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

WIC095-210015-
/O.CON.KMPX.SV.W.0129.000000T0000Z-070621T0015Z/
POLK WI-
702 PM CDT WED JUN 20 2007

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

AT 700 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING BASEBALL SIZE HAIL AND 65 MPH 
WINDS.  THIS STORM WAS LOCATED 5 MILES NORTHWEST OF CENTURIA...OR 
ABOUT 7 MILES NORTH OF ST CROIX FALLS...AND MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE RANGE...MCKINLEY...CUSHING...
MILLTOWN...LUCK...CENTURIA AND BALSAM LAKE.

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 4564 9273 4538 9263 4537 9217 4564 9216

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 3:45 PM CDTSevere Thunderstorm WarningMPXRusk45 min
Jun 20, 5:14 PM CDTSevere Thunderstorm WarningMPXPolk46 min
Jun 20, 5:43 PM CDTSevere Thunderstorm WarningMPXBarron62 min
Jun 20, 6:30 PM CDTSevere Thunderstorm WarningMPXRusk60 min
Jun 20, 6:42 PM CDTSevere Thunderstorm WarningMPXBarron63 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.