Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 77, NWS La Crosse, WI

July 23, 2011La Crosse County, Wisconsin; Houston County, Winona County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 23, 2011, 11:38 AM CDT for La Crosse County, Wisconsin; Houston County, Winona County, Minnesota. It was in force for 52 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: Jul 23, 2011, 11:38 AM CDT (16:38 UTC)
Expired: Jul 23, 2011, 12:30 PM CDT
In force: 52 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Houston County, MN, Winona County, MN, La Crosse County, WI

The radar

The La Crosse radar (KARX), 12 km from the middle of the area, began a volume at 16:37 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 23, 11:52 AM CDT	TSTM WND DMG	4 Se Pickwick, MN	SEVERAL TREES DOWN ON TOWNSHIP RD 8
Jul 23, 12:15 PM CDT	TSTM WND DMG	1 W La Crescent, MN	LARGE TREE DOWN ON A HOUSE ALONG TOWN HALL ROAD
Jul 23, 12:15 PM CDT	TSTM WND GST 45	La Crosse, WI	LSE ASOS
Jul 23, 12:15 PM CDT	HAIL 0.5	La Crosse, WI	FRENCH ISLAND

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 23, 10:14 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 4.6 hours before the alert went out and 213 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: 1467 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 875 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

008 
WUUS53 KARX 231638
SVRARX
MNC055-169-WIC063-231730-
/O.NEW.KARX.SV.W.0077.110723T1638Z-110723T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1138 AM CDT SAT JUL 23 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HOUSTON COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHEASTERN WINONA COUNTY IN SOUTHEAST MINNESOTA...
  LA CROSSE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1230 PM CDT

* AT 1137 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM WINONA TO
  HOUSTON TO RUSHFORD...MOVING EAST AT 40 MPH. THESE STORMS CAN
  PRODUCE NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  HOUSTON AROUND 1145 AM...
  HOUSTON AROUND 1150 AM...
  LA CRESCENT AND DAKOTA AROUND NOON...
  LA CROSSE AND HOKAH AROUND 1205 PM...
  HOLMEN AND BROWNSVILLE AROUND 1210 PM...
  WEST SALEM AROUND 1220 PM...
  BANGOR AROUND 1230 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

SEVERE THUNDERSTORMS POSE A SIGNIFICANT DANGER TO BOATERS. IF ON AREA
RIVERS OR LAKES...IMMEDIATELY MOVE TO SHORE AND FIND SHELTER.

&&

LAT...LON 4373 9126 4368 9127 4364 9126 4363 9128
      4372 9173 4384 9173 4403 9159 4401 9145
      4399 9143 4399 9132 4394 9091 4373 9091
TIME...MOT...LOC 1638Z 285DEG 34KT 4402 9164 4388 9158
          4380 9169
WIND...HAIL 60MPH 0.88IN

$$

MW

3 follow-up statements

976 
WWUS53 KARX 231712
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1212 PM CDT SAT JUL 23 2011

MNC055-169-WIC063-231730-
/O.CON.KARX.SV.W.0077.000000T0000Z-110723T1730Z/
HOUSTON MN-WINONA MN-LA CROSSE WI-
1212 PM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN LA
CROSSE...SOUTHEASTERN WINONA AND NORTHERN HOUSTON COUNTIES UNTIL 1230
PM CDT...

AT 1210 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM HOLMEN TO LA
CROSSE TO BROWNSVILLE...MOVING EAST AT 40 MPH. THESE STORMS CAN
PRODUCE NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

AT 1211 PM...WIND GUSTS TO 36 MPH WERE REPORTED AT THE LA CROSSE 
AIRPORT. 

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  WEST SALEM AROUND 1220 PM...
  BANGOR AROUND 1225 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM SATURDAY
AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN
WISCONSIN.

&&

LAT...LON 4373 9126 4366 9127 4364 9126 4363 9128
      4370 9164 4403 9159 4401 9146 4399 9143
      4399 9132 4394 9091 4373 9092
TIME...MOT...LOC 1712Z 285DEG 34KT 4394 9121 4380 9115
          4372 9126
WIND...HAIL 60MPH <.50IN

$$

MW

618 
WWUS53 KARX 231722
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1222 PM CDT SAT JUL 23 2011

MNC055-169-WIC063-231730-
/O.CON.KARX.SV.W.0077.000000T0000Z-110723T1730Z/
HOUSTON MN-WINONA MN-LA CROSSE WI-
1222 PM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN LA
CROSSE...SOUTHEASTERN WINONA AND NORTHEASTERN HOUSTON COUNTIES UNTIL
1230 PM CDT...

AT 1220 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM WEST SALEM TO
COON VALLEY TO STODDARD...MOVING EAST AT 40 MPH. THESE STORMS CAN
PRODUCE PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM SATURDAY
AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN
WISCONSIN.

&&

LAT...LON 4373 9092 4373 9126 4366 9127 4364 9126
      4363 9128 4367 9147 4399 9143 4399 9132
      4394 9091
TIME...MOT...LOC 1722Z 285DEG 34KT 4392 9108 4378 9102
          4370 9113
WIND...HAIL 60MPH 0.75IN

$$

MW

213 
WWUS53 KARX 231730
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1230 PM CDT SAT JUL 23 2011

MNC055-169-WIC063-231740-
/O.EXP.KARX.SV.W.0077.000000T0000Z-110723T1730Z/
HOUSTON MN-WINONA MN-LA CROSSE WI-
1230 PM CDT SAT JUL 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LA CROSSE...
SOUTHEASTERN WINONA AND NORTHEASTERN HOUSTON COUNTIES HAS EXPIRED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT
SATURDAY AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.

LAT...LON 4373 9092 4373 9126 4366 9127 4364 9126
      4363 9128 4367 9147 4399 9143 4399 9132
      4394 9091
TIME...MOT...LOC 1722Z 285DEG 34KT 4392 9108 4378 9102
          4370 9113

$$

MW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:23 AM CDT	Heat Advisory	ARX	Crawford, Grant	12 hr
Jul 23, 11:57 AM CDT	Areal Flood Advisory	ARX	La Crosse	76 min
Jul 23, 10:11 AM CDT	Severe Thunderstorm Warning	ARX	Dodge, Olmsted, Wabasha	79 min
Jul 23, 11:03 AM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Olmsted, Winona	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 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.