Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 63, NWS La Crosse, WI

July 11, 2011Grant County, Wisconsin; Clayton County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 11, 2011, 5:38 AM CDT for Grant County, Wisconsin; Clayton County, Iowa. It was in force for 58 min. 8 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 11, 2011, 5:38 AM CDT (10:38 UTC)
Expired: Jul 11, 2011, 6:36 AM CDT
In force: 58 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.5 in
Wind: 70.0 mph

Counties Clayton County, IA, Grant County, WI

The radar

The Quad Cities radar (KDVN), 124 km from the middle of the area, began a volume at 10:41 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 11, 5:40 AM CDT	TSTM WND DMG	2 Se North Buena Vista, IA
Jul 11, 5:57 AM CDT	TSTM WND DMG	1 Ne Kieler, WI	THERE WAS SOME CORN FLATTENED ALONG COUNTY ROAD H.
Jul 11, 5:59 AM CDT	TSTM WND DMG	1 Ene Kieler, WI	GRAIN DRYER AND OTHER FARM EQUIPMENT DAMAGED. ALSO CORN FLATTENED ALONG COUNTY ROAD H IN SAME GENERAL LOCATION.
Jul 11, 6:00 AM CDT	TSTM WND DMG	Kieler, WI	TREES AND POWERLINES DOWN AROUND KIELER.
Jul 11, 6:05 AM CDT	TSTM WND DMG	Dickeyville, WI	CAR WASH BUILDING HAS ROOF TORN OFF AND A BRICK WALL ON ITS SIDE KNOCKED DOWN.
Jul 11, 6:10 AM CDT	TSTM WND GST 67	3 W Balltown, IA	ALSO WIDESPREAD CROP DAMAGE.
Jul 11, 6:14 AM CDT	TSTM WND GST 45	1 W Cuba City, WI
Jul 11, 6:15 AM CDT	TSTM WND GST 52	Platteville, 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
Jul 11, 3:30 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 10.6 hours before the alert went out and 125 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: 3733 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 14.3

Open this sounding in Storm Lab

The text

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

209 
WUUS53 KARX 111038
SVRARX
IAC043-WIC043-111145-
/O.NEW.KARX.SV.W.0063.110711T1038Z-110711T1145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
538 AM CDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CLAYTON COUNTY IN NORTHEAST IOWA...
  GRANT COUNTY IN SOUTHWEST WISCONSIN...

* UNTIL 645 AM CDT

* AT 534 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED 12 MILES SOUTH OF FAIRVIEW...OR 15
  MILES EAST OF MANCHESTER...MOVING EAST AT 80 MPH. THIS STORM CAN
  PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLOOMINGTON AND NORTH BUENA VISTA AROUND 545 AM...
  SPECHTS FERRY AND MCCARTNEY AROUND 550 AM...
  LANCASTER AND DICKEYVILLE AROUND 555 AM...
  PLATTEVILLE AND CUBA CITY AROUND 600 AM...
  PLATTEVILLE AIRPORT AND ARTHUR AROUND 605 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4264 9072 4267 9089 4264 9090 4264 9140
      4273 9110 4307 9091 4314 9043 4250 9043
      4250 9063
TIME...MOT...LOC 1038Z 257DEG 69KT 4253 9106
WIND...HAIL 70MPH <.50IN

$$

JW

4 follow-up statements

438 
WWUS53 KARX 111055
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
555 AM CDT MON JUL 11 2011

IAC043-WIC043-111145-
/O.CON.KARX.SV.W.0063.000000T0000Z-110711T1145Z/
CLAYTON IA-GRANT WI-
555 AM CDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT AND
SOUTHEASTERN CLAYTON COUNTIES UNTIL 645 AM CDT...

AT 553 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR KIELER...OR 6 MILES NORTH OF
DUBUQUE...MOVING EAST AT 80 MPH. THIS STORM CAN PRODUCE DESTRUCTIVE
WINDS IN EXCESS OF 70 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PLATTEVILLE AND CUBA CITY AROUND 600 AM...
  PLATTEVILLE AIRPORT AND ARTHUR AROUND 605 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4264 9072 4267 9089 4264 9090 4264 9112
      4273 9110 4307 9091 4314 9043 4250 9043
      4251 9063
TIME...MOT...LOC 1054Z 257DEG 69KT 4260 9065
WIND...HAIL 70MPH <.50IN

$$

JW

163 
WWUS53 KARX 111104
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
604 AM CDT MON JUL 11 2011

IAC043-WIC043-111145-
/O.CON.KARX.SV.W.0063.000000T0000Z-110711T1145Z/
CLAYTON IA-GRANT WI-
604 AM CDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT AND
SOUTHEASTERN CLAYTON COUNTIES UNTIL 645 AM CDT...

AT 557 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM HIGHLAND TO
LANCASTER TO EAST DUBUQUE...MOVING EAST AT 60 MPH. THESE STORMS CAN
PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PLATTEVILLE AND CUBA CITY...
  ARTHUR...CASTLE ROCK...FENNIMORE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THESE
STORMS...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4264 9072 4267 9089 4264 9090 4264 9112
      4273 9110 4307 9091 4314 9043 4250 9043
      4251 9063
TIME...MOT...LOC 1102Z 248DEG 54KT 4311 9043 4281 9055
          4252 9053
WIND...HAIL 70MPH <.50IN

$$

JW

830 
WWUS53 KARX 111127
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
627 AM CDT MON JUL 11 2011

IAC043-WIC043-111145-
/O.CON.KARX.SV.W.0063.000000T0000Z-110711T1145Z/
CLAYTON IA-GRANT WI-
627 AM CDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
GRANT AND SOUTHEASTERN CLAYTON COUNTIES UNTIL 645 AM CDT...

AT 620 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM HIGHLAND TO
PLATTEVILLE TO HAZEL GREEN...MOVING EAST AT 60 MPH. THESE STORMS CAN 
PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THE STRONG WINDS WILL 
PERSIST FOR 10 TO 20 MINUTES AFTER THE STORMS HAVE PASSED.

* LOCATIONS IMPACTED INCLUDE...
  CASTLE ROCK...ROCKVILLE...AND KIELER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THESE
STORMS...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4264 9072 4267 9089 4264 9090 4264 9112
      4276 9101 4298 9067 4312 9043 4250 9043
      4251 9063
TIME...MOT...LOC 1124Z 248DEG 54KT 4313 9037 4281 9039
          4252 9037
WIND...HAIL 70MPH <.50IN

$$

JW

957 
WWUS53 KARX 111136
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
636 AM CDT MON JUL 11 2011

IAC043-WIC043-111146-
/O.CAN.KARX.SV.W.0063.000000T0000Z-110711T1145Z/
CLAYTON IA-GRANT WI-
636 AM CDT MON JUL 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GRANT AND
SOUTHEASTERN CLAYTON COUNTIES 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 1100 AM CDT
MONDAY MORNING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN.

LAT...LON 4264 9072 4267 9089 4264 9090 4264 9112
      4276 9101 4298 9067 4312 9043 4250 9043
      4251 9063
TIME...MOT...LOC 1136Z 248DEG 54KT 4320 9014 4288 9016
          4259 9014

$$

JW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:23 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo	37 min
Jul 11, 2:50 AM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau, Monroe, Richland, Vernon	55 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Severe Thunderstorm Warnings in Iowa, 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.