Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 67, NWS La Crosse, WI

July 17, 2011Taylor County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 17, 2011, 8:29 PM CDT for Taylor County, Wisconsin. It was in force for 25 min. 1 report 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 17, 2011, 8:29 PM CDT (01:29 UTC)
Expired: Jul 17, 2011, 8:54 PM CDT
In force: 25 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.5 in
Wind: 60.0 mph

County Taylor County, WI

The radar

The La Crosse radar (KARX), 172 km from the middle of the area, began a volume at 01:32 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 17, 8:37 PM CDT	TSTM WND GST 40	2 Sw Chelsea, 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 17, 7:22 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 184 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: 3989 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 17.3

Open this sounding in Storm Lab

The text

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

885 
WUUS53 KARX 180129
SVRARX
WIC119-180215-
/O.NEW.KARX.SV.W.0067.110718T0129Z-110718T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
829 PM CDT SUN JUL 17 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN TAYLOR COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 915 PM CDT

* AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM 10 MILES
  EAST OF RIB LAKE TO RIB LAKE TO CHELSEA...MOVING SOUTHEAST AT 40
  MPH. THESE STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  RURAL AREAS OF EASTERN TAYLOR COUNTY BY 840 PM...
  MEDFORD AROUND 845 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. WATCH FOR FALLING TREES OR LARGE BRANCHES 
BREAKING OFF.

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

&&

LAT...LON 4512 9005 4512 9018 4504 9019 4529 9061
      4534 9030 4538 9004
TIME...MOT...LOC 0128Z 303DEG 34KT 4530 8998 4526 9016
          4525 9043
WIND...HAIL 60MPH <.50IN

$$

SHEA

2 follow-up statements

701 
WWUS53 KARX 180141
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
841 PM CDT SUN JUL 17 2011

WIC119-180215-
/O.CON.KARX.SV.W.0067.000000T0000Z-110718T0215Z/
TAYLOR WI-
841 PM CDT SUN JUL 17 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
COUNTY UNTIL 915 PM CDT...

THE PUBLIC REPORTED WINDS OF 40 MPH IN THE CHELSEA AREA SHORTLY 
AFTER 830 PM THIS EVENING. THESE STORMS CONTINUE NORTH OF MEDFORD...
BUT WERE MOVING SOUTHEAST AT 35 MPH. THESE STORMS CAN PRODUCE 
DAMAGING WINDS IN EXCESS OF 60 MPH ALONG WITH VERY HEAVY RAINFALL.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  RURAL EAST TAYLOR COUNTY AT 850 PM...
  GAD AND MEDFORD BY 900 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. WATCH FOR FALLING TREES OR LARGE BRANCHES.

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 MONDAY 
MORNING FOR NORTH CENTRAL WISCONSIN. A FLASH FLOOD WATCH IS ALSO IN 
EFFECT.

&&

LAT...LON 4512 9005 4512 9018 4504 9019 4524 9042
      4534 9030 4538 9004
TIME...MOT...LOC 0140Z 303DEG 32KT 4523 8994 4519 9012
          4518 9039
WIND...HAIL 60MPH <.50IN

$$

SHEA

513 
WWUS53 KARX 180154
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
854 PM CDT SUN JUL 17 2011

WIC119-180204-
/O.CAN.KARX.SV.W.0067.000000T0000Z-110718T0215Z/
TAYLOR WI-
854 PM CDT SUN JUL 17 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TAYLOR COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. WIND GUSTS OF 30-40 MPH HAVE BEEN REPORTED WITH THESE 
STORMS.

THE SEVERE THUNDERSTORM WATCH WILL LIKELY BE CANCELLED BY 930 PM.
THE FLASH FLOOD WATCH WILL CONTINUE OVERNIGHT THOUGH.

LAT...LON 4512 9005 4512 9018 4504 9019 4524 9042
      4534 9030 4538 9004
TIME...MOT...LOC 0154Z 303DEG 32KT 4516 8979 4512 8997
          4511 9024

$$

SHEA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 8:46 AM CDT	Flash Flood Warning	ARX	Jackson, Trempealeau	4 hr
Jul 18, 9:01 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, Trempealeau	44 min
Jul 18, 9:32 AM CDT	Flash Flood Warning	ARX	Jackson, Monroe	3 hr
Jul 18, 9:38 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	37 min

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.