Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 169, NWS Twin Cities, MN

June 21, 2007Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 21, 2007, 12:58 AM CDT for Pepin County, Wisconsin. It was in force for 17 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 21, 2007, 12:58 AM CDT (05:58 UTC)
Expired
Jun 21, 2007, 1:15 AM CDT
In force
17 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Pepin County, WI

The radar

The La Crosse radar (KARX), 105 km from the middle of the area, began a volume at 06:00 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 6.0 hours before the alert went out and 141 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 2007-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 551 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, Minneapolis, MN at 00:00Z on 2007-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
551 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
2355 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
159 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 210558
SVRMPX
WIC091-210615-
/O.NEW.KMPX.SV.W.0169.070621T0558Z-070621T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1258 AM CDT THU JUN 21 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 115 AM CDT

* AT 1256 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
  OVER EAST CENTRAL PEPIN COUNTY...OR ABOUT 7 MILES NORTHWEST OF
  MONDOVI...AND MOVING SOUTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4468 9195 4460 9196 4460 9165 4468 9166

$$
2 follow-up statements
000 
WWUS53 KMPX 210606
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
106 AM CDT THU JUN 21 2007

WIC091-210615-
/O.CON.KMPX.SV.W.0169.000000T0000Z-070621T0615Z/
PEPIN WI-
106 AM CDT THU JUN 21 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR PEPIN COUNTY...

AT 101 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM 
WAS LOCATED OVER NORTHEASTERN PEPIN COUNTY...OR ABOUT 13 MILES NORTH 
OF MODENA...AND MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

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 4468 9193 4460 9192 4460 9165 4468 9167

$$
000 
WWUS53 KMPX 210614
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
114 AM CDT THU JUN 21 2007

WIC091-210624-
/O.EXP.KMPX.SV.W.0169.000000T0000Z-070621T0615Z/
PEPIN WI-
114 AM CDT THU JUN 21 2007

...THE SEVERE THUNDERSTORM WARNING FOR PEPIN COUNTY EXPIRES AT 115 AM
CDT...

SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE COUNTY. HOWEVER...MORE
THUNDERSTORMS WERE DEVELOPING IN THE AREA...REMAIN ALERT FOR POSSIBLE
ADDITIONAL WARNINGS.

LAT...LON 4468 9193 4460 9192 4460 9165 4468 9167

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 7:07 PM CDTSevere Thunderstorm WarningMPXPolk38 min
Jun 20, 7:34 PM CDTSevere Thunderstorm WarningMPXChippewa56 min
Jun 20, 7:59 PM CDTSevere Thunderstorm WarningMPXRusk27 min
Jun 20, 9:20 PM CDTSevere Thunderstorm WarningMPXSaint Croix55 min
Jun 20, 10:00 PM CDTSevere Thunderstorm WarningMPXPierce60 min
Jun 20, 10:39 PM CDTSevere Thunderstorm WarningMPXPepin51 min
Jun 20, 10:48 PM CDTSevere Thunderstorm WarningMPXChippewa, Eau Claire57 min
Jun 20, 11:11 PM CDTSevere Thunderstorm WarningMPXPierce49 min
Jun 21, 1:39 AM CDTSevere Thunderstorm WarningMPXPepin66 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.