Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 25, NWS Green Bay, WI

August 23, 2011Wood County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Aug 23, 2011, 5:20 PM CDT for Wood County, Wisconsin. It was in force for 25 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, 5:20 PM CDT (22:20 UTC)
Expired: Aug 23, 2011, 5:45 PM CDT
In force: 25 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

County Wood County, WI

The radar

The La Crosse radar (KARX), 109 km from the middle of the area, began a volume at 22:21 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, 5:38 PM CDT	FUNNEL CLOUD	4 Sw Marshfield, WI	FUNNEL LOCATED NEAR CNTY ROAD B AND BB

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, 10.3 hours before the alert went out and 167 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.

009 
WFUS53 KGRB 232220
TORGRB
WIC141-232245-
/O.NEW.KGRB.TO.W.0025.110823T2220Z-110823T2245Z/

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

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN WOOD COUNTY IN CENTRAL WISCONSIN...

* UNTIL 545 PM CDT

* AT 517 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO 8 MILES
  WEST OF MARSHFIELD...OR 29 MILES NORTHWEST OF WISCONSIN RAPIDS.
  DOPPLER RADAR SHOWED THIS TORNADO MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PITTSVILLE...LINDSEY...BAKERVILLE...BETHEL...ARPIN...VESPER AND
  DEXTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4450 9032 4469 9032 4456 8995 4430 8998
      4446 9033
TIME...MOT...LOC 2220Z 303DEG 23KT 4462 9030

$$

SKOWRONSKI

2 follow-up statements

497 
WWUS53 KGRB 232234
SVSGRB

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

WIC141-232245-
/O.CON.KGRB.TO.W.0025.000000T0000Z-110823T2245Z/
WOOD WI-
534 PM CDT TUE AUG 23 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN WOOD COUNTY UNTIL
545 PM CDT...

AT 530 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
STORM WAS LOCATED 7 MILES SOUTHWEST OF MARSHFIELD...OR 22 MILES 
NORTHWEST OF WISCONSIN RAPIDS...MOVING SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  PITTSVILLE...BETHEL...ARPIN...VESPER AND DEXTERVILLE.

ALTHOUGH THE STORM HAD WEAKENED A BIT...IT REMAINED CAPABLE OF 
PRODUCING ADDITIONAL TORNADOES. THE TORNADO WARNING WILL REMAIN IN 
EFFECT UNTIL 545 PM.

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 4450 9032 4469 9032 4456 8995 4430 8998
      4446 9033
TIME...MOT...LOC 2232Z 309DEG 24KT 4456 9022

$$

SKOWRONSKI

898 
WWUS53 KGRB 232244
SVSGRB

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

WIC141-232252-
/O.EXP.KGRB.TO.W.0025.000000T0000Z-110823T2245Z/
WOOD WI-
544 PM CDT TUE AUG 23 2011

...THE TORNADO WARNING FOR WESTERN WOOD COUNTY WILL EXPIRE AT 545 PM
CDT...

THE STORM WHICH PROMPTED THE WARNING CONTINUED TO SLOWLY WEAKEN. THE 
TORNADO WARNING WILL BE ALLOWED TO EXPIRE AT 545 PM. BUT 
THUNDERSTORMS WITH STRONG GUSTY WINDS WILL REMAIN IN THE AREA...SO 
STAY INDOORS UNTIL THEY EXIT THE AREA. 

LAT...LON 4450 9032 4469 9032 4456 8995 4430 8998
      4446 9033
TIME...MOT...LOC 2242Z 309DEG 24KT 4452 9015

$$

SKOWRONSKI

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, 5:44 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	61 min
Aug 23, 6:00 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Wood	50 min
Aug 23, 6:56 PM CDT	Tornado Warning	GRB	Outagamie, Shawano	19 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.