Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Twin Cities, MN

April 10, 20115 counties in Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 10, 2011, 3:34 PM CDT for 5 counties in Wisconsin. It was in force for 41 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 10, 2011, 3:34 PM CDT (20:34 UTC)
Expired
Apr 10, 2011, 4:15 PM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Barron County, WI, Chippewa County, WI, Dunn County, WI, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 20:36 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 10, 3:35 PM CDTHAIL 0.55 W Menomonie, WI

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
Apr 10, 3:19 PM CDTTornado Watch PDSSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.6 hours before the alert went out and 133 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 2011-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 552 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 2011-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 528 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
552 J/kg
Mixed-layer CIN
-270 J/kg
Mixed-layer LCL
643 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
528 m²/s²
0-3 km storm-relative helicity
499 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

325 
WUUS53 KMPX 102034
SVRMPX
WIC005-017-033-093-109-102115-
/O.NEW.KMPX.SV.W.0004.110410T2034Z-110410T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
334 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL BARRON COUNTY IN NORTHWEST WISCONSIN...
  WEST CENTRAL CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 415 PM CDT

* AT 331 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
  MPH. THIS STORM WAS LOCATED NEAR SPRING VALLEY...OR ABOUT 15 MILES
  EAST OF ELLSWORTH...AND MOVING NORTHEAST AT 55 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MENOMONIE...
  HERSEY...
  WILSON...
  KNAPP...
  TAINTER LAKE...
  WHEELER...
  COLFAX...
  RIDGELAND...
  SAND CREEK...
  BLOOMER...
  INTERSTATE 94...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4532 9179 4506 9141 4468 9225 4482 9242
TIME...MOT...LOC 2033Z 224DEG 48KT 4484 9218
WIND...HAIL 60MPH 1.25IN

$$
1 follow-up statement
851 
WWUS53 KMPX 102103
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
403 PM CDT SUN APR 10 2011

WIC093-109-102113-
/O.CAN.KMPX.SV.W.0004.000000T0000Z-110410T2115Z/
ST. CROIX WI-PIERCE WI-
403 PM CDT SUN APR 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIERCE AND
SOUTHEASTERN ST. CROIX COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF PIERCE AND ST. 
CROIX COUNTIES.

LAT...LON 4501 9213 4532 9179 4506 9141 4474 9212
TIME...MOT...LOC 2103Z 224DEG 48KT 4513 9179

$$

WIC005-017-033-102115-
/O.CON.KMPX.SV.W.0004.000000T0000Z-110410T2115Z/
BARRON WI-CHIPPEWA WI-DUNN WI-
403 PM CDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DUNN...WEST
CENTRAL CHIPPEWA AND SOUTH CENTRAL BARRON COUNTIES UNTIL 415 PM
CDT...

AT 402 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WHEELER...OR
14 MILES NORTH OF MENOMONIE...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  SAND CREEK...BLOOMER AND DALLAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4501 9213 4532 9179 4506 9141 4474 9212
TIME...MOT...LOC 2103Z 224DEG 48KT 4513 9179
WIND...HAIL 60MPH 1.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 3:20 PM CDTSpecial Weather StatementMPXDunn, Pierce25 min
Apr 10, 4:07 PM CDTSpecial Weather StatementMPXPepin23 min
Apr 10, 4:09 PM CDTSevere Thunderstorm WarningMPXChippewa, Dunn, Eau Claire, Pepin51 min
Apr 10, 4:19 PM CDTSpecial Weather StatementMPXPierce41 min
Apr 10, 4:19 PM CDTSevere Thunderstorm WarningMPXChippewa, Eau Claire, Pepin41 min
Apr 10, 4:32 PM CDTSevere Thunderstorm WarningMPXBarron, Chippewa, Dunn, Rusk43 min
Apr 10, 4:41 PM CDTTornado WarningMPXChippewa, Eau Claire49 min
Apr 10, 4:43 PM CDTTornado WarningMPXBarron, Chippewa, Dunn, Rusk37 min
Apr 10, 4:52 PM CDTTornado WarningMPXEau Claire23 min
Apr 10, 5:00 PM CDTSevere Thunderstorm WarningMPXChippewa, Dunn, Rusk28 min
Apr 10, 5:14 PM CDTTornado WarningMPXEau Claire16 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011Every severe thunderstorm warning in 2011

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.