Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 31, NWS La Crosse, WI

May 20, 2012Clark County, Taylor County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 20, 2012, 12:26 PM CDT for Clark County, Taylor County, Wisconsin. It was in force for 57 min. 4 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 20, 2012, 12:26 PM CDT (17:26 UTC)
Expired: May 20, 2012, 1:23 PM CDT
In force: 57 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clark County, WI, Taylor County, WI

The radar

The La Crosse radar (KARX), 163 km from the middle of the area, began a volume at 17:29 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

Time	Report	Where	Remark
May 20, 12:37 PM CDT	HAIL 0.25	Colby, WI
May 20, 12:39 PM CDT	TSTM WND DMG	1 S Abbotsford, WI	8 INCH DIAMETER TREE BRANCHES DOWN
May 20, 12:39 PM CDT	TSTM WND DMG	2 S Abbotsford, WI	TREE BRANCHES DOWN
May 20, 12:45 PM CDT	HAIL 1	4 E Stetsonville, 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.

Issued	Product	Office	Lasted
May 20, 12:24 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.4 hours before the alert went out and 184 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: 752 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1614 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 31 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.

648 
WUUS53 KARX 201726
SVRARX
WIC019-119-201830-
/O.NEW.KARX.SV.W.0031.120520T1726Z-120520T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1226 PM CDT SUN MAY 20 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CLARK COUNTY IN CENTRAL WISCONSIN...
  EASTERN TAYLOR COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 130 PM CDT

* AT 1225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR ATWOOD...OR 17 MILES SOUTH OF
  MEDFORD...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...
  ABBOTSFORD AROUND 1235 PM...
  DORCHESTER AND COUNTY ROADS A AND E AROUND 1240 PM...   
  STETSONVILLE AND HIGHWAY 64 AND COUNTY D D AROUND 1245 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 4539 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4470 9032 4497 9066 4538 9040
TIME...MOT...LOC 1726Z 203DEG 33KT 4491 9043
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

7 follow-up statements

968 
WWUS53 KARX 201734
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1234 PM CDT SUN MAY 20 2012

WIC019-119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
CLARK WI-TAYLOR WI-
1234 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
AND NORTHEASTERN CLARK COUNTIES UNTIL 130 PM CDT...

AT 1232 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR CURTISS...OR 11 MILES SOUTHWEST OF
MEDFORD...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...
  STETSONVILLE AROUND 1240 PM...
  MEDFORD AND THE TAYLOR COUNTY AIRPORT AROUND 1245 PM...  
  GAD AROUND 1250 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 4539 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4470 9032 4497 9066 4538 9040
TIME...MOT...LOC 1734Z 209DEG 35KT 4504 9041
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

393 
WWUS53 KARX 201743
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1243 PM CDT SUN MAY 20 2012

WIC019-119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
CLARK WI-TAYLOR WI-
1243 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
AND NORTHEASTERN CLARK COUNTIES UNTIL 130 PM CDT...

AT 1239 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR DORCHESTER...OR 8 MILES SOUTH OF
MEDFORD...MOVING NORTHEAST AT 50 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GAD AROUND 1250 PM...
  CHELSEA AND GOODRICH AROUND 1255 PM...
  WESTBORO AND HIGHWAY M AND JOE MARTIN ROAD AROUND 100 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 4539 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4470 9032 4497 9066 4538 9040
TIME...MOT...LOC 1743Z 208DEG 43KT 4507 9025
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

890 
WWUS53 KARX 201750
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1250 PM CDT SUN MAY 20 2012

WIC019-201800-
/O.CAN.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
CLARK WI-
1250 PM CDT SUN MAY 20 2012

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

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY
EVENING FOR NORTHWESTERN WISCONSIN.

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1750Z 208DEG 43KT 4512 9021

$$

WIC119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
TAYLOR WI-
1250 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 130 PM CDT...

AT 1248 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR GAD...OR 6 MILES SOUTHEAST OF
MEDFORD...MOVING NORTHEAST AT 50 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GOODRICH AND NORTH TWIN LAKE AROUND 1255 PM...
  CHELSEA AND HIGHWAY M AND JOE MARTIN ROAD AROUND 100 PM...
  RIB LAKE AND WESTBORO AROUND 105 PM...
  WOOD LAKE AROUND 110 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SUNDAY
EVENING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1750Z 208DEG 43KT 4512 9021
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

159 
WWUS53 KARX 201801
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
101 PM CDT SUN MAY 20 2012

WIC119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
TAYLOR WI-
101 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 130 PM CDT...

AT 1245 PM CDT...PUBLIC REPORTED QUARTER SIZE HAIL WITH THIS 
THUNDERSTORM 4 MILES EAST OF STETSONVILLE IN EASTERN TAYLOR COUNTY. 

AT 1257 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR HIGHWAY M AND JOE MARTIN ROAD...OR
10 MILES EAST OF MEDFORD...MOVING NORTHEAST AT 50 MPH. THIS STORM CAN
PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RIB LAKE AND WESTBORO AROUND 105 PM...
  WOOD LAKE AND CAMP FOREST SPRING AROUND 110 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 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1759Z 210DEG 42KT 4521 9015
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

677 
WWUS53 KARX 201808
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
108 PM CDT SUN MAY 20 2012

WIC119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
TAYLOR WI-
108 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 130 PM CDT...

AT 107 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR WOOD LAKE...OR 17 MILES NORTHEAST OF
MEDFORD...MOVING NORTHEAST AT 50 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SUNDAY
EVENING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1808Z 210DEG 42KT 4530 9007
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

373 
WWUS53 KARX 201812
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
112 PM CDT SUN MAY 20 2012

WIC119-201830-
/O.CON.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
TAYLOR WI-
112 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 130 PM CDT...

AT 111 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR WOOD LAKE...OR 19 MILES NORTHEAST OF
MEDFORD...MOVING NORTHEAST AT 35 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SUNDAY
EVENING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1813Z 215DEG 32KT 4533 9004
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

365 
WWUS53 KARX 201823
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
123 PM CDT SUN MAY 20 2012

WIC119-201832-
/O.CAN.KARX.SV.W.0031.000000T0000Z-120520T1830Z/
TAYLOR WI-
123 PM CDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TAYLOR COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED...THEREFORE
THE WARNING HAS BEEN CANCELLED EARLY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY
EVENING FOR NORTHWESTERN WISCONSIN.

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4509 9057 4529 9046 4538 9040
      4539 9010
TIME...MOT...LOC 1822Z 210DEG 42KT 4544 8995

$$

BOYNE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 12:21 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	24 min
May 20, 1:35 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	14 min
May 20, 1:52 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.