Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 22, NWS La Crosse, WI

May 3, 2012Clark County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 3, 2012, 9:10 PM CDT for Clark County, Wisconsin. It was in force for 38 min. 2 reports 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
May 3, 2012, 9:10 PM CDT (02:10 UTC)
Expired
May 3, 2012, 9:48 PM CDT
In force
38 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Clark County, WI

The radar

The La Crosse radar (KARX), 107 km from the middle of the area, began a volume at 02:13 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
May 3, 9:20 PM CDTHAIL 0.75Rock Dam Lake, WI
May 3, 9:22 PM CDTHAIL 0.51 N Rock Dam Lake, WILOTS OF HAIL COVERING THE GROUND

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.2 hours before the alert went out and 214 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, Green Bay/Straub, WI at 00:00Z on 2012-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 382 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, Green Bay/Straub, WI at 00:00Z on 2012-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
382 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
1258 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

542 
WUUS53 KARX 040210
SVRARX
WIC019-040300-
/O.NEW.KARX.SV.W.0022.120504T0210Z-120504T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
910 PM CDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 1000 PM CDT

* AT 909 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR ROCK DAM LAKE...OR 20 MILES
  NORTHWEST OF NEILLSVILLE...MOVING EAST AT 20 MPH. THIS STORM CAN
  PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROCK DAM LAKE AROUND 920 PM...
  SEVEN SISTER MOUNDS AROUND 925 PM...
  MEAD LAKE AND TIOGA AROUND 930 PM...
  WILLARD AROUND 935 PM...
  HOG CORNERS AND GLOBE AROUND 945 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4463 9065 4467 9093 4483 9093 4484 9092
      4483 9061
TIME...MOT...LOC 0210Z 279DEG 17KT 4476 9089
WIND...HAIL 60MPH 1.00IN

$$

HALBACH
3 follow-up statements
395 
WWUS53 KARX 040225
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
925 PM CDT THU MAY 3 2012

WIC019-040300-
/O.CON.KARX.SV.W.0022.000000T0000Z-120504T0300Z/
CLARK WI-
925 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL CLARK
COUNTY UNTIL 1000 PM CDT...

AT 923 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR WILLARD...OR 14 MILES NORTHWEST OF
NEILLSVILLE...MOVING EAST AT 20 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOG CORNERS AROUND 935 PM...
  GLOBE AROUND 940 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4467 9089 4480 9086 4480 9062 4463 9065
TIME...MOT...LOC 0225Z 284DEG 19KT 4472 9075
WIND...HAIL 60MPH 1.00IN

$$

HALBACH
974 
WWUS53 KARX 040238
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
938 PM CDT THU MAY 3 2012

WIC019-040300-
/O.CON.KARX.SV.W.0022.000000T0000Z-120504T0300Z/
CLARK WI-
938 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL CLARK
COUNTY UNTIL 1000 PM CDT...

AT 937 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR HOG CORNERS...OR 11 MILES NORTH OF
NEILLSVILLE...MOVING EAST AT 20 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4466 9081 4480 9072 4480 9062 4463 9065
TIME...MOT...LOC 0238Z 284DEG 19KT 4470 9066
WIND...HAIL 60MPH 1.00IN

$$

HALBACH
281 
WWUS53 KARX 040248
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
948 PM CDT THU MAY 3 2012

WIC019-040258-
/O.CAN.KARX.SV.W.0022.000000T0000Z-120504T0300Z/
CLARK WI-
948 PM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED 
AREA. 

LAT...LON 4466 9081 4480 9072 4480 9062 4463 9065
TIME...MOT...LOC 0248Z 284DEG 19KT 4469 9058

$$

HALBACH

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 8:21 PM CDTSevere Thunderstorm WarningARXBuffalo, Trempealeau39 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

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.