Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 18, NWS La Crosse, WI

May 3, 2012Adams County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 3, 2012, 7:45 AM CDT for Adams County, Wisconsin. It was in force for 30 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
May 3, 2012, 7:45 AM CDT (12:45 UTC)
Expired
May 3, 2012, 8:15 AM CDT
In force
30 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Adams County, WI

The radar

The La Crosse radar (KARX), 122 km from the middle of the area, began a volume at 12:48 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, 7:46 AM CDTHAIL 1Big Flats, WITRAINED SPOTTER REPORTED DIME TO QUARTER SIZE HAIL IN THE CITY OF BIG FLATS

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 12:00Z, 0.8 hours before the alert went out and 135 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 12:00Z on 2012-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 321 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, Green Bay/Straub, WI at 12:00Z on 2012-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 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
321 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
565 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

042 
WUUS53 KARX 031245
SVRARX
WIC001-031315-
/O.NEW.KARX.SV.W.0018.120503T1245Z-120503T1315Z/

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

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ADAMS COUNTY IN CENTRAL WISCONSIN...

* UNTIL 815 AM CDT

* AT 744 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR BIG FLATS...OR 9 MILES NORTH OF
  FRIENDSHIP...MOVING NORTHEAST AT 40 MPH. THIS STORM CAN PRODUCE
  QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLBURN AND THE COLBURN WILDLIFE AREA AROUND 750 AM...
  COUNTY ROADS O AND W AND COUNTY ROADS C AND G AROUND 755 AM...
  COUNTY ROADS G AND O AND COUNTY ROADS D AND G AROUND 800 AM...

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. SCHOOL CHILDREN SHOULD NOT BE OUTSIDE 
NEAR THESE STORMS.

&&

LAT...LON 4393 8991 4414 8995 4426 8966 4425 8960
      4424 8959 4418 8959 4405 8959
TIME...MOT...LOC 1245Z 245DEG 33KT 4410 8977
WIND...HAIL 60MPH 1.00IN

$$

SHEA
3 follow-up statements
076 
WWUS53 KARX 031259
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
759 AM CDT THU MAY 3 2012

WIC001-031315-
/O.CON.KARX.SV.W.0018.000000T0000Z-120503T1315Z/
ADAMS WI-
759 AM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN 
ADAMS COUNTY UNTIL 815 AM CDT...

TRAINED WEATHER SPOTTERS REPORTED QUARTER SIZE HAIL WITH THIS STORM 
EARLIER NEAR BIG FLATS. IT WILL REMAIN IN MAINLY RURAL AREAS OF 
NORTHEAST ADAMS COUNTY BEFORE MOVING INTO WAUSHARA COUNTY SHORTLY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COUNTY ROADS G AND O AND COUNTY ROADS D AND G AROUND 805 AM...

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. SCHOOL CHILDREN SHOULD NOT BE ALLOWED 
OUTSIDE.

&&

LAT...LON 4396 8982 4415 8984 4426 8966 4425 8960
      4424 8959 4405 8959
TIME...MOT...LOC 1258Z 244DEG 40KT 4410 8967
WIND...HAIL 60MPH 1.00IN

$$

SHEA
689 
WWUS53 KARX 031307
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
807 AM CDT THU MAY 3 2012

WIC001-031315-
/O.CON.KARX.SV.W.0018.000000T0000Z-120503T1315Z/
ADAMS WI-
807 AM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN 
ADAMS COUNTY UNTIL 815 AM CDT...

AT 802 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM LOCATED NEAR THE COLBURN WILDLIFE AREA...OR 10 
MILES NORTHEAST OF FRIENDSHIP...MOVING NORTHEAST AT 45 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 4400 8975 4415 8972 4426 8966 4425 8960
      4424 8959 4405 8959
TIME...MOT...LOC 1308Z 243DEG 38KT 4409 8959
WIND...HAIL 60MPH 1.00IN

$$

SHEA
031 
WWUS53 KARX 031313
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
813 AM CDT THU MAY 3 2012

WIC001-031323-
/O.EXP.KARX.SV.W.0018.000000T0000Z-120503T1315Z/
ADAMS WI-
813 AM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ADAMS COUNTY WILL 
EXPIRE AT 815 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. THIS STORM HAD A HISTORY OF LARGE HAIL.

LAT...LON 4400 8975 4415 8972 4426 8966 4425 8960
      4424 8959 4405 8959
TIME...MOT...LOC 1313Z 243DEG 38KT 4411 8952

$$

SHEA

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 8:48 PM CDTSevere Thunderstorm WarningARXBuffalo72 min
May 2, 9:19 PM CDTSevere Thunderstorm WarningARXBuffalo56 min
May 2, 9:23 PM CDTSevere Thunderstorm WarningARXTrempealeau67 min
May 2, 9:33 PM CDTTornado WarningARXBuffalo27 min
May 2, 9:53 PM CDTSevere Thunderstorm WarningARXTrempealeau52 min
May 2, 10:26 PM CDTSevere Thunderstorm WarningARXJackson30 min
May 3, 7:11 AM CDTSevere Thunderstorm WarningARXLa Crosse, Trempealeau, Vernon49 min
May 3, 8:09 AM CDTSevere Thunderstorm WarningARXRichland26 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.