Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 73, NWS La Crosse, WI

July 19, 2011Clark County, Jackson County, Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 19, 2011, 9:45 PM CDT for Clark County, Jackson County, Trempealeau County, Wisconsin. It was in force for 60 min. 5 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: Jul 19, 2011, 9:45 PM CDT (02:45 UTC)
Expired: Jul 19, 2011, 10:45 PM CDT
In force: 60 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.5 in
Wind: 60.0 mph

Counties Clark County, WI, Jackson County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 87 km from the middle of the area, began a volume at 02:46 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
Jul 19, 9:49 PM CDT	TSTM WND GST 39	Neillsville, WI
Jul 19, 9:56 PM CDT	TSTM WND GST 60	2 E Loyal, WI
Jul 19, 10:10 PM CDT	TSTM WND DMG	Northfield, WI	A NUMBER OF TREES KNOCKED DOWN NEAR NORTHFIELD. ONE WAS NORTH OF HWY 121 ALONG COUNTY ROAD G. ANOTHER ALONG DEGROOT RD EAST OF NORTHFIELD OFF OF HWY 121.
Jul 19, 10:15 PM CDT	TSTM WND GST 40	3 W Neillsville, WI
Jul 19, 10:20 PM CDT	TSTM WND DMG	2 S Merrillan, WI	A COUPLE TREES KNOCKED DOWN ACROSS THE ROAD JUST SOUTH OF MERRILLAN NEAR GARAGE RD.

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
Jul 19, 5:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.8 hours before the alert went out and 211 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: 1847 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

833 
WUUS53 KARX 200245
SVRARX
WIC019-053-121-200345-
/O.NEW.KARX.SV.W.0073.110720T0245Z-110720T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
945 PM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CLARK COUNTY IN CENTRAL WISCONSIN...
  JACKSON COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN TREMPEALEAU COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1045 PM CDT

* AT 941 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM LOYAL TO
  NEILLSVILLE TO OSSEO...MOVING SOUTHEAST AT 40 MPH. THESE STORMS CAN
  PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH. TRAINED WEATHER
  SPOTTERS HAVE ALREADY REPORTED WINDS OF 60 MPH WITH THESE STORMS.  
  THIS WARNING EXTENDS THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR  
  CLARK COUNTY.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  NEILLSVILLE AROUND 950 PM...
  HUMBIRD AROUND 955 PM...
  SHORTVILLE AROUND 1000 PM...
  HATFIELD AROUND 1010 PM...
  BLACK RIVER FALLS AROUND 1025 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4422 9099 4460 9140 4460 9093 4465 9093
      4466 9065 4485 9038 4480 9031 4426 9031
TIME...MOT...LOC 0244Z 315DEG 35KT 4472 9041 4460 9056
          4459 9128
WIND...HAIL 60MPH <.50IN

$$

HALBACH

6 follow-up statements

203 
WWUS53 KARX 200257
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
957 PM CDT TUE JUL 19 2011

WIC019-053-121-200345-
/O.CON.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
CLARK WI-JACKSON WI-TREMPEALEAU WI-
957 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
TREMPEALEAU...JACKSON AND SOUTHERN CLARK COUNTIES UNTIL 1045 PM
CDT...

AT 956 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM MARSHFIELD TO
SHORTVILLE TO OSSEO...MOVING SOUTHEAST AT 40 MPH. THESE STORMS CAN
PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  HATFIELD AROUND 1010 PM...
  BLACK RIVER FALLS AROUND 1025 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM WEDNESDAY
MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4422 9099 4460 9140 4460 9093 4465 9093
      4466 9065 4485 9038 4480 9031 4426 9031
TIME...MOT...LOC 0258Z 315DEG 35KT 4462 9028 4450 9043
          4450 9115
WIND...HAIL 60MPH <.50IN

$$

HALBACH

338 
WWUS53 KARX 200301
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1001 PM CDT TUE JUL 19 2011

WIC019-053-121-200345-
/O.CON.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
CLARK WI-JACKSON WI-TREMPEALEAU WI-
1001 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
TREMPEALEAU...JACKSON AND SOUTHERN CLARK COUNTIES UNTIL 1045 PM
CDT...

TRAINED WEATHER SPOTTERS REPORTED WINDS OF 60 MPH SOUTHWEST OF 
SPENCER WITH A LINE OF SEVERE THUNDERSTORMS.

AT 956 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM MARSHFIELD TO
SHORTVILLE TO PRICE...MOVING SOUTHEAST AT 45 MPH. THESE STORMS CAN
PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BLACK RIVER FALLS AROUND 1020 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM WEDNESDAY
MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4422 9099 4460 9140 4460 9093 4465 9093
      4466 9065 4485 9038 4480 9031 4426 9031
TIME...MOT...LOC 0301Z 315DEG 38KT 4457 9020 4445 9035
          4444 9106
WIND...HAIL 60MPH <.50IN

$$

HALBACH

416 
WWUS53 KARX 200320
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1020 PM CDT TUE JUL 19 2011

WIC019-053-121-200345-
/O.CON.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
CLARK WI-JACKSON WI-TREMPEALEAU WI-
1020 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
TREMPEALEAU...JACKSON AND SOUTHERN CLARK COUNTIES UNTIL 1045 PM
CDT...

AT 1015 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM NEILLSVILLE TO
HUMBIRD...MOVING SOUTHEAST AT 45 MPH. THESE STORMS CAN PRODUCE
DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  HATFIELD AROUND 1025 PM...
  BLACK RIVER FALLS AND SHORTVILLE AROUND 1030 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM WEDNESDAY
MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4422 9099 4460 9140 4460 9093 4465 9093
      4466 9065 4468 9062 4471 9031 4426 9031
TIME...MOT...LOC 0320Z 311DEG 39KT 4455 9069 4442 9089
WIND...HAIL 60MPH <.50IN

$$

HALBACH

287 
WWUS53 KARX 200330
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1030 PM CDT TUE JUL 19 2011

WIC121-200341-
/O.CAN.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
TREMPEALEAU WI-
1030 PM CDT TUE JUL 19 2011

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

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
WEDNESDAY MORNING FOR NORTHWESTERN WISCONSIN.

LAT...LON 4426 9031 4422 9099 4439 9117 4460 9117
      4460 9093 4455 9031
TIME...MOT...LOC 0331Z 311DEG 39KT 4446 9062 4433 9082

$$

WIC019-053-200345-
/O.CON.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
CLARK WI-JACKSON WI-
1030 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR JACKSON AND
SOUTHERN CLARK COUNTIES UNTIL 1045 PM CDT...

AT 1024 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM NEILLSVILLE TO
BLACK RIVER FALLS...MOVING SOUTHEAST AT 45 MPH. THESE STORMS CAN
PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM WEDNESDAY
MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4426 9031 4422 9099 4439 9117 4460 9117
      4460 9093 4455 9031
TIME...MOT...LOC 0331Z 311DEG 39KT 4446 9062 4433 9082
WIND...HAIL 60MPH <.50IN

$$

HALBACH

352 
WWUS53 KARX 200338
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1038 PM CDT TUE JUL 19 2011

WIC019-200348-
/O.CAN.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
CLARK WI-
1038 PM CDT TUE JUL 19 2011

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

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
WEDNESDAY MORNING FOR NORTHWESTERN WISCONSIN.

LAT...LON 4426 9031 4422 9099 4439 9117 4447 9105
      4444 9080 4442 9080 4442 9060 4439 9033
TIME...MOT...LOC 0338Z 315DEG 35KT 4441 9067 4429 9086

$$

WIC053-200345-
/O.CON.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
JACKSON WI-
1038 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
JACKSON COUNTY UNTIL 1045 PM CDT...

AT 1035 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM HATFIELD TO
BLACK RIVER FALLS...MOVING SOUTHEAST AT 40 MPH. THESE STORMS CAN
PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM WEDNESDAY
MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4426 9031 4422 9099 4439 9117 4447 9105
      4444 9080 4442 9080 4442 9060 4439 9033
TIME...MOT...LOC 0338Z 315DEG 35KT 4441 9067 4429 9086
WIND...HAIL 60MPH <.50IN

$$

HALBACH

642 
WWUS53 KARX 200344
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1044 PM CDT TUE JUL 19 2011

WIC053-200354-
/O.EXP.KARX.SV.W.0073.000000T0000Z-110720T0345Z/
JACKSON WI-
1044 PM CDT TUE JUL 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JACKSON COUNTY WILL
EXPIRE AT 1045 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS. HOWEVER...THE LINE OF STORMS REMAINS STRONG AND COULD 
PRODUCE GUSTY WINDS...IN ADDITION TO LIGHTNING AND HEAVY RAIN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
WEDNESDAY MORNING FOR NORTHWESTERN WISCONSIN.

LAT...LON 4426 9031 4422 9099 4439 9117 4447 9105
      4444 9080 4442 9080 4442 9060 4439 9033
TIME...MOT...LOC 0344Z 315DEG 35KT 4437 9061 4425 9080

$$

HALBACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:19 PM CDT	Tornado Warning	ARX	Clark, Taylor	26 min
Jul 19, 7:43 PM CDT	Tornado Warning	ARX	Clark, Taylor	32 min
Jul 19, 7:45 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	60 min
Jul 19, 8:37 PM CDT	Flash Flood Warning	ARX	Clark, Taylor	4 hr
Jul 19, 8:45 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	60 min
Jul 19, 9:41 PM CDT	Flash Flood Warning	ARX	Clark	3 hr
Jul 19, 10:27 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	63 min
Jul 20, 12:25 AM CDT	Areal Flood Warning	ARX	Clark, Taylor	9 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.