Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS La Crosse, WI

July 25, 2012Grant County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 25, 2012, 10:49 PM CDT for Grant County, Wisconsin. It was in force for 56 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, 10:49 PM CDT (03:49 UTC)
Expired: Jul 25, 2012, 11:45 PM CDT
In force: 56 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), 106 km from the middle of the area, began a volume at 03:51 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, 11:12 PM CDT	TSTM WND DMG	Lancaster, WI	SEVERAL REPORTS OF TREES DOWN ACROSS TOWN
Jul 25, 11:22 PM CDT	TSTM WND DMG	Fennimore, WI	SEVERAL POWER LINES DOWN ACROSS TOWN

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, 3.8 hours before the alert went out and 145 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.

923 
WUUS53 KARX 260349
SVRARX
WIC043-260445-
/O.NEW.KARX.SV.W.0079.120726T0349Z-120726T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1049 PM CDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 1145 PM CDT

* AT 1046 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM
  FARMERSBURG TO CASSVILLE TO EAST DUBUQUE...MOVING EAST AT 35 MPH.
  THESE STORMS CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN
  EXCESS OF 60 MPH. THERE HAS BEEN REPORTS OF TREES DOWN IN
  NORTHEAST IOWA.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  DICKEYVILLE AND HAZEL GREEN AROUND 1105 PM...
  CUBA CITY AROUND 1115 PM...
  LANCASTER AROUND 1120 PM...
  PLATTEVILLE AROUND 1130 PM...
  FENNIMORE AND BOSCOBEL AROUND 1140 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0349Z 270DEG 31KT 4301 9130 4274 9094
          4252 9057
WIND...HAIL 60MPH 1.00IN

$$

SHEA

5 follow-up statements

365 
WWUS53 KARX 260407
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1107 PM CDT WED JUL 25 2012

WIC043-260445-
/O.CON.KARX.SV.W.0079.000000T0000Z-120726T0445Z/
GRANT WI-
1107 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT COUNTY
UNTIL 1145 PM CDT...

AT 1105 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM PRAIRIE DU
CHIEN TO CASSVILLE TO PLATTEVILLE...MOVING EAST AT 35 MPH. THESE 
STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...ALONG WITH 
TORRENTIAL RAINS.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  PLATTEVILLE AND HAZEL GREEN AROUND 1120 PM...
  LANCASTER AROUND 1125 PM...
  BOSCOBEL AROUND 1135 PM...
  FENNIMORE AROUND 1140 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR STRONG WIND GUSTS. THERE WILL ALSO BE FREQUENT 
LIGHTNING. REMAIN INDOORS.

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

&&

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0407Z 271DEG 31KT 4298 9104 4277 9083
          4272 9056
WIND...HAIL 60MPH <.50IN

$$

SHEA

981 
WWUS53 KARX 260419
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1119 PM CDT WED JUL 25 2012

WIC043-260445-
/O.CON.KARX.SV.W.0079.000000T0000Z-120726T0445Z/
GRANT WI-
1119 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT COUNTY
UNTIL 1145 PM CDT...

AT 1115 PM...RADAR SHOWED STRONG TO SEVERE THUNDERSTORMS FROM NEAR 
PLATTEVILLE TO FENNIMORE TO NEAR WAUZEKA. THE STORMS EXTENDED BACK 
THROUGH THE PRAIRIE DU CHIEN AREA AND INTO NORTHEAST IOWA AS WELL 
WITH A THREAT FOR STRONG WINDS AND TORRENTIAL RAINS.

ISOLATED WIND GUSTS OF 60 MPH ARE STILL POSSIBLE WITH STRONGER 
STORMS.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BOSCOBEL AROUND 1120 PM...
  BLUE RIVER AROUND 1125 PM...
  MONTFORT AROUND 1130 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0418Z 234DEG 34KT 4306 9085 4298 9061
          4281 9046
WIND...HAIL 60MPH <.50IN

$$

SHEA

348 
WWUS53 KARX 260432
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1132 PM CDT WED JUL 25 2012

WIC043-260445-
/O.CON.KARX.SV.W.0079.000000T0000Z-120726T0445Z/
GRANT WI-
1132 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT COUNTY
UNTIL 1145 PM CDT...

LAW ENFORCEMENT REPORTED TREES DOWN IN LANCASTER AROUND 1110 PM.
THE STRONGEST STORMS ARE ACROSS NORTHEAST PARTS OF GRANT COUNTY AS 
OF 1130 PM...APPROACHING THE MUSCODA AND BLUE RIVER AREAS. 
ADDITIONAL STRONG STORMS ARE MOVING OUT OF THE DUBUQUE AREA TOWARDS 
THE FAR SOUTHERN END OF THE COUNTY AS WELL.

TORRENTIAL RAINS WILL FALL AS WELL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WATCH FOR LOCALIZED FLOODING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM.

&&

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0431Z 234DEG 34KT 4313 9071 4305 9047
          4288 9032
WIND...HAIL 60MPH <.50IN

$$

SHEA

671 
WWUS53 KARX 260442
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1142 PM CDT WED JUL 25 2012

WIC043-260445-
/O.CON.KARX.SV.W.0079.000000T0000Z-120726T0445Z/
GRANT WI-
1142 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRANT COUNTY
UNTIL 1145 PM CDT...

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED WIND DAMAGE IN FENNIMORE 
WITH SOME TREES DOWN. A WIND GUSTS OF 55 MPH WAS ALSO REPORTED IN 
THE DUBUQUE AREA FROM ADDITIONAL STORMS COMING IN FROM THE SOUTHWEST.

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.

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 100 AM THURSDAY
MORNING FOR NORTHEASTERN IOWA AND SOUTHWEST WISCONSIN.

&&

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0441Z 215DEG 35KT 4322 9060 4319 9047
          4314 9041
WIND...HAIL 60MPH <.50IN

$$

SHEA

895 
WWUS53 KARX 260447
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1147 PM CDT WED JUL 25 2012

WIC043-260457-
/O.EXP.KARX.SV.W.0079.000000T0000Z-120726T0445Z/
GRANT WI-
1147 PM CDT WED JUL 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR GRANT COUNTY HAS EXPIRED...

THE STORMS WHICH PROMPTED THE WARNING HAVE SHIFTED INTO RICHLAND 
COUNTY. GUSTY WINDS ARE STILL POSSIBLE IN FAR SOUTHERN GRANT COUNTY 
AS WELL BUT SHOULD REMAIN BELOW SEVERE LIMITS.

LAT...LON 4264 9072 4268 9095 4274 9105 4288 9110
      4290 9114 4299 9116 4300 9113 4299 9106
      4307 9093 4307 9087 4312 9075 4317 9069
      4321 9054 4320 9044 4251 9043 4250 9063
TIME...MOT...LOC 0442Z 215DEG 35KT 4323 9059 4320 9046
          4315 9040

$$

SHEA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 9:03 PM CDT	Severe Thunderstorm Warning	ARX	Grant	57 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.