Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 7, NWS Twin Cities, MN

April 10, 20114 counties in Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 10, 2011, 4:32 PM CDT for 4 counties in Wisconsin. It was in force for 43 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: Apr 10, 2011, 4:32 PM CDT (21:32 UTC)
Expired: Apr 10, 2011, 5:15 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Barron County, WI, Chippewa County, WI, Dunn County, WI, Rusk County, WI

The radar

The La Crosse radar (KARX), 172 km from the middle of the area, began a volume at 21:33 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
Apr 10, 4:36 PM CDT	HAIL 1	3 Nnw Bloomer, WI
Apr 10, 4:45 PM CDT	HAIL 0.75	4 S Island Lake, WI
Apr 10, 4:45 PM CDT	HAIL 1.75	1 W New Auburn, WI
Apr 10, 5:05 PM CDT	HAIL 1.75	Island Lake, WI	HWY 40 AND COUNTY RD D

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
Apr 10, 3:19 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 203 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: 552 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 528 m²/s²
0-3 km storm-relative helicity: 499 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

307 
WUUS53 KMPX 102132
SVRMPX
WIC005-017-033-107-102215-
/O.NEW.KMPX.SV.W.0007.110410T2132Z-110410T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
432 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BARRON COUNTY IN NORTHWEST WISCONSIN...
  WESTERN CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  RUSK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 515 PM CDT

* AT 431 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BLOOMER...OR
  ABOUT 12 MILES NORTHWEST OF CHIPPEWA FALLS...AND MOVING            
  NORTHEAST AT 80 MPH. THIS STORM HAS A HISTORY OF PRODUCING GOLF    
  BALL SIZE HAIL.

LOCATIONS IN THE WARNING INCLUDE...
  LADYSMITH...
  BLOOMER...
  EAGLETON...
  NEW AUBURN...
  CORNELL...
  ISLAND LAKE...
  HOLCOMBE...
  WEYERHAEUSER...
  BRUCE...
  SHELDON...
  CONRATH...
  TONY...
  GLEN FLORA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER LINES.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4537 9087 4537 9091 4534 9091 4495 9140
      4511 9178 4565 9133 4565 9121 4547 9074
TIME...MOT...LOC 2132Z 216DEG 70KT 4509 9152
WIND...HAIL 60MPH 1.75IN

$$

1 follow-up statement

019 
WWUS53 KMPX 102208
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
508 PM CDT SUN APR 10 2011

WIC005-017-033-107-102215-
/O.CON.KMPX.SV.W.0007.000000T0000Z-110410T2215Z/
BARRON WI-RUSK WI-CHIPPEWA WI-DUNN WI-
508 PM CDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
DUNN...WESTERN CHIPPEWA...RUSK AND SOUTHEASTERN BARRON COUNTIES UNTIL
515 PM CDT...

AT 445 PM CDT...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZE 1 
WEST OF NEW AUBURN.

LOCATIONS IMPACTED INCLUDE...
  GLEN FLORA...LADYSMITH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4537 9087 4537 9091 4534 9091 4495 9140
      4511 9178 4565 9133 4565 9121 4547 9074
TIME...MOT...LOC 2207Z 225DEG 73KT 4555 9108
WIND...HAIL <50MPH 1.75IN

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 3:20 PM CDT	Special Weather Statement	MPX	Dunn, Pierce	25 min
Apr 10, 3:34 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn, Pierce, Saint Croix	41 min
Apr 10, 4:07 PM CDT	Special Weather Statement	MPX	Pepin	23 min
Apr 10, 4:09 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire, Pepin	51 min
Apr 10, 4:19 PM CDT	Special Weather Statement	MPX	Pierce	41 min
Apr 10, 4:19 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Eau Claire, Pepin	41 min
Apr 10, 4:41 PM CDT	Tornado Warning	MPX	Chippewa, Eau Claire	49 min
Apr 10, 4:43 PM CDT	Tornado Warning	MPX	Barron, Chippewa, Dunn, Rusk	37 min
Apr 10, 4:52 PM CDT	Tornado Warning	MPX	Eau Claire	23 min
Apr 10, 5:00 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Rusk	28 min
Apr 10, 5:14 PM CDT	Tornado Warning	MPX	Eau Claire	16 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.