Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 28, NWS La Crosse, WI

May 6, 2012Adams County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 6, 2012, 7:45 AM CDT for Adams County, Wisconsin. It was in force for 18 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: May 6, 2012, 7:45 AM CDT (12:45 UTC)
Expired: May 6, 2012, 8:03 AM CDT
In force: 18 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), 125 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.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 0.8 hours before the alert went out and 144 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 691 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 113 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.

769 
WUUS53 KARX 061245
SVRARX
WIC001-061315-
/O.NEW.KARX.SV.W.0028.120506T1245Z-120506T1315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
745 AM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 815 AM CDT

* AT 739 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR COONS DEEP LAKE CAMPGROUND...OR 
  12 MILES NORTHEAST OF WISCONSIN DELLS...MOVING NORTHEAST AT 
  30 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING 
  WINDS IN EXCESS OF 60 MPH. TRAINED WEATHER SPOTTERS HAVE ALREADY
  REPORTED PING PONG BALL SIZE HAIL WITH THIS STORM.

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 4372 8965 4380 8972 4392 8960 4391 8959
      4376 8959
TIME...MOT...LOC 1244Z 223DEG 26KT 4380 8961
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

3 follow-up statements

372 
WWUS53 KARX 061252
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
752 AM CDT SUN MAY 6 2012

WIC001-061315-
/O.CON.KARX.SV.W.0028.000000T0000Z-120506T1315Z/
ADAMS WI-
752 AM CDT SUN MAY 6 2012

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

AT 748 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR BROOKS...OR 15 MILES NORTHEAST OF
WISCONSIN DELLS...MOVING NORTHEAST AT 15 MPH. THIS STORM CAN PRODUCE 
PING PONG BALL SIZE HAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4372 8965 4380 8972 4392 8960 4391 8959
      4376 8959
TIME...MOT...LOC 1252Z 205DEG 13KT 4382 8960
WIND...HAIL <50MPH 1.50IN

$$

BOYNE

878 
WWUS53 KARX 061256
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
756 AM CDT SUN MAY 6 2012

WIC001-061315-
/O.CON.KARX.SV.W.0028.000000T0000Z-120506T1315Z/
ADAMS WI-
756 AM CDT SUN MAY 6 2012

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

AT 753 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR BROOKS...OR 17 MILES NORTHEAST OF
WISCONSIN DELLS...MOVING NORTHEAST AT 25 MPH. THIS STORM CAN PRODUCE
PING PONG BALL SIZE HAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4372 8965 4380 8972 4392 8960 4391 8959
      4376 8959
TIME...MOT...LOC 1256Z 236DEG 21KT 4382 8955
WIND...HAIL <50MPH 1.50IN

$$

BOYNE

265 
WWUS53 KARX 061303
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
803 AM CDT SUN MAY 6 2012

WIC001-061313-
/O.CAN.KARX.SV.W.0028.000000T0000Z-120506T1315Z/
ADAMS WI-
803 AM CDT SUN MAY 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4372 8965 4380 8972 4392 8960 4391 8959
      4376 8959
TIME...MOT...LOC 1303Z 205DEG 13KT 4386 8958

$$

BOYNE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 8:39 AM CDT	Severe Thunderstorm Warning	ARX	Grant	20 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.