Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 14, NWS Green Bay, WI

April 10, 2011Brown County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Apr 10, 2011, 9:00 PM CDT for Brown County, Wisconsin. It was in force for 30 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
Apr 10, 2011, 9:00 PM CDT (02:00 UTC)
Expired
Apr 10, 2011, 9:30 PM CDT
In force
30 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon

County Brown County, WI

The radar

The Green Bay radar (KGRB), 20 km from the middle of the area, began a volume at 02:01 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

TimeReportWhereRemark
Apr 10, 9:10 PM CDTTSTM WND DMGWrightstown, WIROOF TORN OFF BUILDING
Apr 10, 9:15 PM CDTFUNNEL CLOUDDenmark, 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.

IssuedProductOfficeLasted
Apr 10, 3:19 PM CDTTornado Watch PDSSPC7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.0 hours before the alert went out and 18 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2011-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1647 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2011-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 399 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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.

748 
WFUS53 KGRB 110200
TORGRB
WIC009-110230-
/O.NEW.KGRB.TO.W.0014.110411T0200Z-110411T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
900 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN BROWN COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 930 PM CDT

* AT 856 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 9 MILES
  NORTH OF BRILLION...OR 14 MILES SOUTH OF GREEN BAY. DOPPLER RADAR
  SHOWED THIS TORNADO MOVING NORTHEAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  SHIRLEY AT 910 PM CDT.
  DENMARK AROUND 915 PM CDT.

OTHER LOCATIONS IMPACTED BY THE TORNADO INCLUDE...LARK...LANGES 
CORNERS...BELLEVUE...POLAND AND HUMBOLDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GREEN BAY.

&&

LAT...LON 4433 8819 4437 8818 4454 8777 4433 8777
      4432 8781 4433 8788 4430 8788 4425 8807
TIME...MOT...LOC 0159Z 240DEG 30KT 4432 8804

$$

KIECKBUSCH
3 follow-up statements
941 
WWUS53 KGRB 110210
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
910 PM CDT SUN APR 10 2011

WIC009-110230-
/O.CON.KGRB.TO.W.0014.000000T0000Z-110411T0230Z/
BROWN WI-
910 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL BROWN COUNTY UNTIL
930 PM CDT...

AT 906 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES WEST OF DENMARK...OR 11 MILES SOUTH OF
GREEN BAY...MOVING NORTHEAST AT 45 MPH.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL BROWN 
COUNTY...INCLUDING THE FOLLOWING LOCATIONS...LANGES CORNERS...POLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 4437 8803 4442 8806 4454 8777 4434 8777
      4433 8778 4432 8780 4433 8788 4430 8788
      4428 8796
TIME...MOT...LOC 0209Z 245DEG 40KT 4437 8789

$$

KIECKBUSCH
166 
WWUS53 KGRB 110215
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
915 PM CDT SUN APR 10 2011

WIC009-110230-
/O.CON.KGRB.TO.W.0014.000000T0000Z-110411T0230Z/
BROWN WI-
915 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL BROWN COUNTY UNTIL
930 PM CDT...

AT 910 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED 3 MILES NORTHEAST OF SHIRLEY...OR 12 MILES 
SOUTHEAST OF GREEN BAY...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  LANGES CORNERS...POLAND AND HUMBOLDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 4437 8803 4442 8806 4454 8777 4434 8777
      4433 8778 4432 8780 4433 8788 4430 8788
      4428 8796
TIME...MOT...LOC 0215Z 243DEG 37KT 4438 8784

$$

KIECKBUSCH
039 
WWUS53 KGRB 110222
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
922 PM CDT SUN APR 10 2011

WIC009-110231-
/O.EXP.KGRB.TO.W.0014.000000T0000Z-110411T0230Z/
BROWN WI-
922 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR CENTRAL BROWN COUNTY HAS BEEN CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4437 8803 4442 8806 4454 8777 4434 8777
      4433 8778 4432 8780 4433 8788 4430 8788
      4428 8796
TIME...MOT...LOC 0221Z 243DEG 37KT 4441 8776

$$

KIECKBUSCH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 7:11 PM CDTSevere Thunderstorm WarningGRBWaushara34 min
Apr 10, 7:15 PM CDTTornado WarningGRBForest, Langlade, Oneida30 min
Apr 10, 7:27 PM CDTTornado WarningGRBWaushara33 min
Apr 10, 7:29 PM CDTTornado WarningGRBOutagamie, Waupaca46 min
Apr 10, 7:42 PM CDTTornado WarningGRBFlorence, Forest, Marinette48 min
Apr 10, 7:56 PM CDTTornado WarningGRBOutagamie, Waupaca, Waushara, Winnebago34 min
Apr 10, 8:10 PM CDTAreal Flood AdvisoryGRBCalumet, Outagamie, Winnebago117 min
Apr 10, 8:29 PM CDTTornado WarningGRBWinnebago31 min
Apr 10, 8:29 PM CDTTornado WarningGRBBrown, Calumet, Outagamie, Winnebago31 min
Apr 10, 8:56 PM CDTTornado WarningGRBCalumet, Winnebago34 min
Apr 10, 9:02 PM CDTSpecial Marine WarningGRB106 min
Apr 10, 9:16 PM CDTTornado WarningGRBManitowoc29 min
Apr 10, 9:19 PM CDTSevere Thunderstorm WarningGRBKewaunee26 min
Apr 10, 9:34 PM CDTTornado WarningGRBManitowoc26 min
Apr 10, 9:46 PM CDTRiver Flood WarningGRBMarathon, Portage4 days
Apr 10, 9:46 PM CDTRiver Flood WarningGRBPortage, Wood63 hr
Apr 10, 10:13 PM CDTRiver Flood WarningGRBOutagamie24 days
Apr 10, 10:13 PM CDTRiver Flood WarningGRBOutagamie, Waupaca12 days
Apr 10, 10:13 PM CDTRiver Flood WarningGRBWaupaca60 hr
Apr 11, 10:14 AM CDTRiver Flood WarningGRBMarathon46 hr
Apr 11, 11:46 AM CDTRiver Flood WarningGRBLincoln45 hr

Nearby

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