Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS La Crosse, WI

May 20, 2012Taylor County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 20, 2012, 1:52 PM CDT for Taylor County, Wisconsin. It was in force for 23 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, 1:52 PM CDT (18:52 UTC)
Expired: May 20, 2012, 2:15 PM CDT
In force: 23 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Taylor County, WI

The radar

The La Crosse radar (KARX), 174 km from the middle of the area, began a volume at 18:53 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, 1:53 PM CDT	HAIL 0.25	3 Ese Stetsonville, WI
May 20, 1:58 PM CDT	HAIL 0.25	4 E Stetsonville, WI
May 20, 2:00 PM CDT	TSTM WND DMG	5 E Stetsonville, WI	ROOF BLOWN OFF AN OLDER BUILDING ALONG COUNTY HWY A NEAR THE TAYLOR AND MARATHON COUNTY LINE
May 20, 2:02 PM CDT	HAIL 0.75	Gad, 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, 6.9 hours before the alert went out and 181 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.

363 
WUUS53 KARX 201852
SVRARX
WIC119-201915-
/O.NEW.KARX.SV.W.0033.120520T1852Z-120520T1915Z/

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

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 215 PM CDT

* AT 148 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR STETSONVILLE...OR 9 MILES
  SOUTHEAST OF MEDFORD...MOVING NORTHEAST AT 45 MPH. THIS STORM CAN
  PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GAD AROUND 200 PM...
  GOODRICH AND HIGHWAY 13 AND COUNTY ROAD M AROUND 205 PM...
  CHELSEA AND HIGHWAY M AND JOE MARTIN ROAD AROUND 210 PM...
  RIB LAKE AND WESTBORO AROUND 215 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 4515 9003 4511 9007 4512 9018
      4504 9019 4503 9020 4503 9046 4538 9034
      4539 9005
TIME...MOT...LOC 1852Z 207DEG 37KT 4505 9024
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

4 follow-up statements

947 
WWUS53 KARX 201904
SVSARX

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

WIC119-201915-
/O.CON.KARX.SV.W.0033.000000T0000Z-120520T1915Z/
TAYLOR WI-
204 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 215 PM CDT...

AT 202 PM CDT...THE GAD COOPERATIVE OBSERVER REPORTED DIME SIZE HAIL 
WITH THIS THUNDERSTORM.

AT 202 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR GAD...OR 9 MILES EAST OF MEDFORD...
MOVING NORTHEAST AT 45 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL
AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHELSEA AND HIGHWAY M AND JOE MARTIN ROAD AROUND 210 PM...
  RIB LAKE AND WESTBORO AROUND 215 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 4515 9003 4511 9007 4512 9018
      4504 9019 4503 9020 4503 9046 4538 9034
      4539 9005
TIME...MOT...LOC 1904Z 207DEG 37KT 4516 9016
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

707 
WWUS53 KARX 201909
SVSARX

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

WIC119-201915-
/O.CON.KARX.SV.W.0033.000000T0000Z-120520T1915Z/
TAYLOR WI-
209 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 215 PM CDT...

AT 207 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR HIGHWAY M AND JOE MARTIN ROAD...OR
11 MILES EAST OF MEDFORD...MOVING NORTHEAST AT 45 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 215 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 4515 9003 4511 9007 4512 9018
      4504 9019 4503 9020 4503 9046 4538 9034
      4539 9005
TIME...MOT...LOC 1909Z 207DEG 37KT 4521 9012
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

354 
WWUS53 KARX 201913
SVSARX

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

WIC119-201915-
/O.CON.KARX.SV.W.0033.000000T0000Z-120520T1915Z/
TAYLOR WI-
213 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 215 PM CDT...

AT 212 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR HIGHWAY M AND JOE MARTIN ROAD...OR
14 MILES NORTHEAST OF MEDFORD...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 4538 9004 4515 9003 4511 9007 4512 9018
      4504 9019 4503 9020 4503 9046 4538 9034
      4539 9005
TIME...MOT...LOC 1913Z 207DEG 37KT 4524 9010
WIND...HAIL 60MPH 1.00IN

$$

BOYNE

818 
WWUS53 KARX 201916
SVSARX

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

WIC119-201925-
/O.EXP.KARX.SV.W.0033.000000T0000Z-120520T1915Z/
TAYLOR WI-
216 PM CDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TAYLOR COUNTY HAS
EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED NORTHEAST INTO 
LINCOLN COUNTY.

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

LAT...LON 4538 9004 4515 9003 4511 9007 4512 9018
      4504 9019 4503 9020 4503 9046 4538 9034
      4539 9005
TIME...MOT...LOC 1913Z 207DEG 37KT 4525 9009

$$

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, 12:26 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	57 min
May 20, 1:35 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	14 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.