Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 61, NWS La Crosse, WI

June 20, 2012Taylor County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 20, 2012, 5:16 PM CDT for Taylor County, Wisconsin. It was in force for 59 min. 3 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: Jun 20, 2012, 5:16 PM CDT (22:16 UTC)
Expired: Jun 20, 2012, 6:15 PM CDT
In force: 59 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), 165 km from the middle of the area, began a volume at 22:18 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
Jun 20, 5:32 PM CDT	TSTM WND GST 40	1 N Jump River, WI
Jun 20, 5:51 PM CDT	TSTM WND DMG	1 Nw Medford, WI	A COUPLE TREES AND A POWER POLE DOWN.
Jun 20, 6:06 PM CDT	TSTM WND GST 45	1 S Medford, WI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.3 hours before the alert went out and 200 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: 657 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

334 
WUUS53 KARX 202216
SVRARX
WIC119-202315-
/O.NEW.KARX.SV.W.0061.120620T2216Z-120620T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
516 PM CDT WED JUN 20 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 615 PM CDT

* AT 512 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM           
  LADYSMITH TO 13 MILES EAST OF CHIPPEWA FALLS...MOVING NORTHEAST AT 
  60 MPH. THESE STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60    
  MPH. TRAINED WEATHER SPOTTERS HAVE ALREADY REPORTED ESTIMATED      
  WINDS OF 65 MPH WITH THESE STORMS NEAR BLOOMER.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  JUMP RIVER AROUND 530 PM...
  MEDFORD AROUND 550 PM...
  WESTBORO AND CHELSEA AROUND 555 PM...
  RIB LAKE AROUND 600 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.

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

&&

LAT...LON 4518 9003 4503 9060 4503 9092 4539 9092
      4538 9004
TIME...MOT...LOC 2215Z 249DEG 52KT 4549 9104 4512 9106
          4498 9107
WIND...HAIL 60MPH <.50IN

$$

AJ

3 follow-up statements

942 
WWUS53 KARX 202232
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
532 PM CDT WED JUN 20 2012

WIC119-202315-
/O.CON.KARX.SV.W.0061.000000T0000Z-120620T2315Z/
TAYLOR WI-
532 PM CDT WED JUN 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR TAYLOR COUNTY
UNTIL 615 PM CDT...

AT 525 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS WERE ROUGHLY 
ALONG A LINE EXTENDING FROM 12 MILES NORTHEAST OF LADYSMITH THROUGH 
DONALD TO 9 MILES NORTHWEST OF THORP...MOVING NORTHEAST AT 50 MPH. 
THESE STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH. 
ESTIMATED WIND GUSTS OF 65 MPH HAVE ALREADY BEEN REPORTED WITH THE 
LINE OF STORMS NEAR BLOOMER AND CHIPPEWA FALLS.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  JUMP RIVER AROUND 535 PM...
  MEDFORD AROUND 555 PM...
  WESTBORO AND CHELSEA AROUND 605 PM...
  RIB LAKE AROUND 610 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.

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

&&

LAT...LON 4518 9003 4503 9060 4503 9092 4539 9092
      4538 9004
TIME...MOT...LOC 2230Z 245DEG 45KT 4561 9083 4509 9085
WIND...HAIL 60MPH <.50IN

$$

AJ

215 
WWUS53 KARX 202253
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
553 PM CDT WED JUN 20 2012

WIC119-202315-
/O.CON.KARX.SV.W.0061.000000T0000Z-120620T2315Z/
TAYLOR WI-
553 PM CDT WED JUN 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR TAYLOR COUNTY
UNTIL 615 PM CDT...

AT 548 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS WERE ROUGHLY 
ALONG A LINE EXTENDING FROM 27 MILES NORTHWEST OF WESTBORO TO 11 
MILES WEST OF MEDFORD...MOVING NORTHEAST AT 50 MPH. A STORM SPOTTER 
NEAR JUMP RIVER REPORTED A WIND GUST NEAR 40 MPH...THOUGH THE 
POTENTIAL REMAINS FOR THE STORMS TO PRODUCE DAMAGING WINDS IN EXCESS 
OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  WESTBORO AND CHELSEA AROUND 605 PM...
  RIB LAKE AROUND 610 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.

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

&&

LAT...LON 4518 9003 4503 9060 4503 9092 4537 9065
      4538 9004
TIME...MOT...LOC 2252Z 245DEG 45KT 4572 9047 4520 9050
WIND...HAIL 60MPH <.50IN

$$

AJ

701 
WWUS53 KARX 202309
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
609 PM CDT WED JUN 20 2012

WIC119-202318-
/O.EXP.KARX.SV.W.0061.000000T0000Z-120620T2315Z/
TAYLOR WI-
609 PM CDT WED JUN 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR TAYLOR COUNTY WILL EXPIRE AT
615 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS. HOWEVER...THE LINE OF STORMS REMAINS STRONG AND COULD 
PRODUCE GUSTY WINDS TO 50 MPH...IN ADDITION TO LIGHTNING AND HEAVY 
RAIN. THE AUTOMATED OBSERVATION AT THE MEDFORD AIRPORT RECENTLY 
REPORTED A GUST TO 45 MPH WITH THE STORMS.

LAT...LON 4518 9003 4503 9060 4503 9092 4537 9065
      4538 9004
TIME...MOT...LOC 2308Z 245DEG 45KT 4580 9020 4514 9024

$$

AJ

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.