Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS La Crosse, WI

July 25, 2012Grant County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 25, 2012, 9:03 PM CDT for Grant County, Wisconsin. It was in force for 57 min. 2 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 25, 2012, 9:03 PM CDT (02:03 UTC)
Expired: Jul 25, 2012, 10:00 PM CDT
In force: 57 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Grant County, WI

The radar

The La Crosse radar (KARX), 110 km from the middle of the area, began a volume at 02:04 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 25, 9:48 PM CDT	TSTM WND DMG	Ellenboro, WI	A BARN DOWN ALONG WITH NUMEROUS TREES
Jul 25, 9:54 PM CDT	TSTM WND GST 60	3 N Platteville, WI	TREE BRANCHES DOWN. ALSO 1/2 INCH HAIL OBSERVED

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 25, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.1 hours before the alert went out and 142 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: 700 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 2702 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

374 
WUUS53 KARX 260203
SVRARX
WIC043-260300-
/O.NEW.KARX.SV.W.0075.120726T0203Z-120726T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
903 PM CDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL GRANT COUNTY IN SOUTHWEST WISCONSIN...

* UNTIL 1000 PM CDT

* AT 859 PM...LAW ENFORCEMENT REPORTED NICKEL TO QUARTER SIZED
  HAIL JUST NORTH OF GUTTENBERG IOWA IN CLAYTON COUNTY. ANOTHER
  STORM COULD BE PRODUCING LARGE HAIL NEAR FENNIMORE. BOTH OF
  THESE STORMS COULD PRODUCE LARGE HAIL OR GUSTY WINDS.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FENNIMORE AROUND 905 PM...
  BLOOMINGTON AND BEETOWN AROUND 915 PM...
  LANCASTER AND LANCASTER MUNICIPAL AIRPORT AROUND 935 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.

SEVERE THUNDERSTORMS POSE A SIGNIFICANT DANGER TO BOATERS. IF ON THE
MISSISSIPPI RIVER...MOVE TO SHORE.

&&

LAT...LON 4274 9105 4277 9107 4283 9108 4283 9109
      4288 9110 4291 9115 4294 9115 4313 9042
      4271 9043
TIME...MOT...LOC 0201Z 265DEG 31KT 4283 9108
WIND...HAIL 60MPH 1.00IN

$$

SHEA

5 follow-up statements

846 
WWUS53 KARX 260214
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
914 PM CDT WED JUL 25 2012

WIC043-260300-
/O.CON.KARX.SV.W.0075.000000T0000Z-120726T0300Z/
GRANT WI-
914 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL GRANT
COUNTY UNTIL 1000 PM CDT...

AT 908 PM...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED 
NEAR GLEN HAVEN...AND ANOTHER STORM JUST SOUTHEAST OF FENNIMORE IN 
CENTRAL GRANT COUNTY. THESE STORMS WERE MOVING EAST AT 35 MPH. THESE 
STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS AROUND 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BLOOMINGTON AROUND 915 PM...
  BEETOWN AROUND 920 PM...
  MOUNT HOPE AROUND 925 PM...
  LANCASTER AND LANCASTER MUNICIPAL AIRPORT AROUND 935 PM.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE INSIDE WHEN STORMS APPROACH. THESE STORMS COULD PRODUCE LARGE 
HAIL OR BRING DOWN TREE LIMBS AND LARGE BRANCHES. TORRENTIAL RAIN 
COULD LEAD TO PONDING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 AM THURSDAY.

&&

LAT...LON 4274 9105 4277 9107 4283 9108 4283 9109
      4288 9110 4291 9115 4294 9115 4313 9042
      4271 9043
TIME...MOT...LOC 0212Z 265DEG 31KT 4284 9098
WIND...HAIL 60MPH 1.00IN

$$

SHEA

914 
WWUS53 KARX 260223
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
923 PM CDT WED JUL 25 2012

WIC043-260300-
/O.CON.KARX.SV.W.0075.000000T0000Z-120726T0300Z/
GRANT WI-
923 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL GRANT
COUNTY UNTIL 1000 PM CDT...

AT 918 PM...DOPPLER RADAR INDICATED STRONG TO SEVERE THUNDERSTORMS 
BETWEEN FENNIMORE AND MONTFORT...WITH OTHER STORMS FROM BLOOMINGTON 
TO GLEN HAVEN. ALL THESE STORMS ARE PRODUCING HEAVY RAIN...GUSTY
WINDS AND CAN HAVE SOME HAIL WITH THEM FROM TIME TO TIME. SEVERAL 
COMMUNITIES HAVE REPORTED GUSTY WINDS BUT NO DAMAGE HAS BEEN 
REPORTED SO FAR.

* THESE SEVERE THUNDERSTORMS WILL BE NEAR...
  LANCASTER AROUND 935 PM...
  STITZER AROUND 945 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE INSIDE AND BE ALERT FOR GUSTY WINDS THAT CAN KNOCK DOWN
BRANCES OR TREES.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 AM THURSDAY.

&&

LAT...LON 4274 9105 4277 9107 4283 9108 4283 9109
      4288 9110 4291 9115 4294 9115 4313 9042
      4271 9043
TIME...MOT...LOC 0221Z 256DEG 20KT 4297 9054
WIND...HAIL 60MPH 1.00IN

$$

SHEA

811 
WWUS53 KARX 260244
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
944 PM CDT WED JUL 25 2012

WIC043-260300-
/O.CON.KARX.SV.W.0075.000000T0000Z-120726T0300Z/
GRANT WI-
944 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL GRANT
COUNTY UNTIL 1000 PM CDT...

AT 941 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR LANCASTER MUNICIPAL AIRPORT...OR
NEAR LANCASTER...MOVING EAST AT 40 MPH. THIS STORM CAN PRODUCE
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  UNION AND ANNATON AROUND 950 PM...
  PLATTEVILLE AND ARTHUR AROUND 955 PM...
  LIVINGSTON AROUND 1000 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS GROWN IN STRENGTH AND COULD PRODUCE HAIL ALONG WITH 
GUSTY WINDS. STAY INDOORS AND BE ALERT FOR TREES OR BRANCHES 
BREAKING OFF.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 AM THURSDAY.

&&

LAT...LON 4286 9103 4304 9043 4271 9043 4274 9105
      4277 9107 4283 9108
TIME...MOT...LOC 0243Z 279DEG 34KT 4281 9064
WIND...HAIL 60MPH 1.00IN

$$

SHEA

597 
WWUS53 KARX 260252
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
952 PM CDT WED JUL 25 2012

WIC043-260300-
/O.CON.KARX.SV.W.0075.000000T0000Z-120726T0300Z/
GRANT WI-
952 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL GRANT
COUNTY UNTIL 1000 PM CDT...

AT 945 PM...A SEVERE THUNDERSTORM WAS BETWEEN PLATTEVILLE AND 
LANCASTER. THIS STORM COULD BE PRODUCING HAIL UP TO 1 INCH IN 
DIAMETER ALONG WITH GUSTY WINDS AND TORRENTIAL RAIN. OTHER WEAKER 
STORMS EXTENDED BACK TOWARDS THE CASSVILLE AREA AND WERE ALL MOVING
EAST.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MONTFORT AROUND 955 PM...
  PLATTEVILLE AND ARTHUR AROUND 1000 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WATCH FOR HAIL AND GUSTY WINDS OVER THE NEXT 10 MINUTES. DO NOT 
DRIVE INTO ANY WATER OVER ROADS AS WELL.

&&

LAT...LON 4289 9092 4304 9043 4271 9043 4274 9105
TIME...MOT...LOC 0249Z 279DEG 34KT 4281 9058
WIND...HAIL 60MPH 1.00IN

$$

SHEA

912 
WWUS53 KARX 260301
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1001 PM CDT WED JUL 25 2012

WIC043-260309-
/O.EXP.KARX.SV.W.0075.000000T0000Z-120726T0300Z/
GRANT WI-
1001 PM CDT WED JUL 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRANT COUNTY WILL BE 
ALLOWED TO EXPIRE AT 1000 PM...

A SEVERE THUNDERSTORM IS ABOUT 5 MILES NORTH OF PLATTEVILLE...
ABOUT TO MOVE INTO IOWA OR LAFAYETTE COUNTIES. THIS STORM COULD 
STILL BE PRODUCING LARGE HAIL AND GUSTY WINDS.

WIND GUSTS OF 60 MPH WERE REPORTED FROM A STORM SPOTTER ABOUT 3 
MILES NORTH OF PLATTEVILLE ABOUT 955 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
THURSDAY MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.

LAT...LON 4289 9092 4304 9043 4271 9043 4274 9105
TIME...MOT...LOC 0259Z 279DEG 34KT 4280 9043

$$

SHEA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 10:49 PM CDT	Severe Thunderstorm Warning	ARX	Grant	56 min
Jul 25, 11:45 PM CDT	Severe Thunderstorm Warning	ARX	Richland	30 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.