Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 26, NWS Green Bay, WI

August 23, 2011Outagamie County, Shawano County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Aug 23, 2011, 6:56 PM CDT for Outagamie County, Shawano County, Wisconsin. It was in force for 19 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: Aug 23, 2011, 6:56 PM CDT (23:56 UTC)
Expired: Aug 23, 2011, 7:15 PM CDT
In force: 19 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

Counties Outagamie County, WI, Shawano County, WI

The radar

The Green Bay radar (KGRB), 22 km from the middle of the area, began a volume at 23:59 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
Aug 23, 6:56 PM CDT	TORNADO	Sse Briarton, WI	BRIEF EF0 TORNADO TOUCHED DOWN IN FIELD SHORTLY BEFORE 7 PM NORTH OF SHADY RD BETWEEN HERMAN CREEK RD AND ELM RD. TALL GRASS/HAY IN FIELD WAS FLATTENED IN CYCLONIC PATTERN. IN ADDITION, APPROX A DOZEN TREES HAD SNAPPED LIMBS. TIME ESTIMATED.

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
Aug 23, 5:19 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.9 hours before the alert went out and 24 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: 45 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

955 
WFUS53 KGRB 232356
TORGRB
WIC087-115-240015-
/O.NEW.KGRB.TO.W.0026.110823T2356Z-110824T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
656 PM CDT TUE AUG 23 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL OUTAGAMIE COUNTY IN NORTHEAST WISCONSIN...\
  SOUTHEAST EASTERN SHAWANO COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 715 PM CDT

* AT 655 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 9 MILES NORTH OF BLACK CREEK...OR 16 MILES
  SOUTHEAST OF SHAWANO...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROSE LAWN.

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 4457 8851 4466 8850 4462 8831 4463 8827
      4459 8826 4458 8824 4452 8825
TIME...MOT...LOC 2356Z 295DEG 26KT 4458 8839

$$

TDH

2 follow-up statements

490 
WWUS53 KGRB 240002
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
702 PM CDT TUE AUG 23 2011

WIC087-115-240015-
/O.CON.KGRB.TO.W.0026.000000T0000Z-110824T0015Z/
OUTAGAMIE WI-SHAWANO WI-
702 PM CDT TUE AUG 23 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN SHAWANO AND NORTH
CENTRAL OUTAGAMIE COUNTIES UNTIL 715 PM CDT...

AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 9 MILES SOUTHWEST OF PULASKI...OR 18 MILES WEST OF
GREEN BAY...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHEASTERN OUTAGAMIE COUNTY.

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 4457 8851 4466 8850 4462 8831 4463 8827
      4459 8826 4458 8824 4452 8825
TIME...MOT...LOC 0002Z 290DEG 28KT 4456 8832

$$

TDH

946 
WWUS53 KGRB 240007
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
707 PM CDT TUE AUG 23 2011

WIC115-240017-
/O.CAN.KGRB.TO.W.0026.000000T0000Z-110824T0015Z/
SHAWANO WI-
707 PM CDT TUE AUG 23 2011

...THE TORNADO WARNING FOR EASTERN SHAWANO COUNTY IS CANCELLED...

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

LAT...LON 4454 8835 4458 8833 4458 8830 4458 8826
      4458 8824 4452 8825
TIME...MOT...LOC 0007Z 290DEG 28KT 4455 8827

$$

WIC087-240015-
/O.CON.KGRB.TO.W.0026.000000T0000Z-110824T0015Z/
OUTAGAMIE WI-
707 PM CDT TUE AUG 23 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN OUTAGAMIE
COUNTY UNTIL 715 PM CDT...

AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES SOUTHWEST OF PULASKI...OR 16 MILES WEST OF
GREEN BAY...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHEASTERN OUTAGAMIE COUNTY.

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 4454 8835 4458 8833 4458 8830 4458 8826
      4458 8824 4452 8825
TIME...MOT...LOC 0007Z 290DEG 28KT 4455 8827

$$

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 4:26 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon	64 min
Aug 23, 4:58 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Wood	32 min
Aug 23, 5:20 PM CDT	Tornado Warning	GRB	Wood	25 min
Aug 23, 5:44 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	61 min
Aug 23, 6:00 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Wood	50 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.