Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 1, NWS Milwaukee, WI

April 10, 2011Fond du Lac County, Green Lake County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Apr 10, 2011, 8:23 PM CDT for Fond du Lac County, Green Lake County, Wisconsin. It was in force for 22 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: Apr 10, 2011, 8:23 PM CDT (01:23 UTC)
Expired: Apr 10, 2011, 8:45 PM CDT
In force: 22 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon

Counties Fond du Lac County, WI, Green Lake County, WI

The radar

The Green Bay radar (KGRB), 90 km from the middle of the area, began a volume at 01:24 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, 8:27 PM CDT	TORNADO	3 Sse Berlin, WI	DELAYED ASSESSMENT. EF0 TORNADO PER SPOTTER AND EMERGENCY MANAGEMENT REPORTS AND RADAR IMAGERY. LASTED ABOUT 2 MINUTES. INITIAL POSITION IN OPEN FARM AREA. TORNADO MOVED NORTHEAST AND ENDED ON MEADOWBROOK ROAD IN GREEN LAKE COUNTY WHERE IT BROKE SOME TREE BRAN

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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.4 hours before the alert went out and 89 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: 1647 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 399 m²/s²
0-3 km storm-relative helicity: 397 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

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

652 
WFUS53 KMKX 110123
TORMKX
WIC039-047-110145-
/O.NEW.KMKX.TO.W.0001.110411T0123Z-110411T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
823 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN FOND DU LAC COUNTY IN EAST CENTRAL WISCONSIN...
  NORTHEASTERN GREEN LAKE COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 845 PM CDT

* AT 820 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GREEN LAKE...OR 7 MILES SOUTHWEST OF
  BERLIN...AND MOVING NORTHEAST AT 65 MPH.

* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN
  GREEN LAKE AND NORTHWESTERN FOND DU LAC COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A
BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE.
AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO
THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING
DEBRIS.

&&

LAT...LON 4398 8888 4390 8888 4390 8872 4389 8872
      4377 8901 4393 8915 4399 8903 4399 8889
TIME...MOT...LOC 0123Z 239DEG 56KT 4390 8897

$$

KUHLMAN

2 follow-up statements

004 
WWUS53 KMKX 110137
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
837 PM CDT SUN APR 10 2011

WIC039-047-110145-
/O.CON.KMKX.TO.W.0001.000000T0000Z-110411T0145Z/
FOND DU LAC WI-GREEN LAKE WI-
837 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL GREEN LAKE
AND NORTHWESTERN FOND DU LAC COUNTIES UNTIL 845 PM CDT...

AT 834 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR RIPON...MOVING EAST AT 55 MPH.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
GREEN LAKE AND NORTHWESTERN FOND DU LAC COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4383 8906 4392 8889 4390 8888 4390 8872
      4389 8872 4377 8901
TIME...MOT...LOC 0137Z 251DEG 46KT 4387 8881

$$

KUHLMAN

361 
WWUS53 KMKX 110141
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
841 PM CDT SUN APR 10 2011

WIC039-047-110152-
/O.EXP.KMKX.TO.W.0001.000000T0000Z-110411T0145Z/
FOND DU LAC WI-GREEN LAKE WI-
841 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR EAST CENTRAL GREEN LAKE AND NORTHWESTERN
FOND DU LAC COUNTIES WILL EXPIRE AT 845 PM CDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.  HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE
WITH THIS THUNDERSTORM.

LAT...LON 4383 8906 4392 8889 4390 8888 4390 8872
      4389 8872 4377 8901
TIME...MOT...LOC 0142Z 251DEG 46KT 4389 8872

$$

KUHLMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:05 PM CDT	Severe Thunderstorm Warning	MKX	Sauk	40 min
Apr 10, 7:41 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Marquette, Sauk	49 min
Apr 10, 8:09 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac, Green Lake	51 min
Apr 10, 10:05 PM CDT	Special Marine Warning	MKX		94 min
Apr 10, 10:21 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Waukesha	24 min
Apr 10, 10:34 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Walworth	26 min

Nearby

Tornado Warnings in Wisconsin, 2011 Every tornado warning in 2011 Tornadoes 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.