Alert archive / Wisconsin / Tornado Warnings in 2012

Tornado Warning 7, NWS Green Bay, WI

July 6, 2012Oneida County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 6, 2012, 7:40 PM CDT for Oneida County, Wisconsin. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 6, 2012, 7:40 PM CDT (00:40 UTC)
Expired: Jul 6, 2012, 8:15 PM CDT
In force: 35 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

County Oneida County, WI

The radar

The Green Bay radar (KGRB), 159 km from the middle of the area, began a volume at 00:42 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 6, 6:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.7 hours before the alert went out and 161 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: 1332 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

591 
WFUS53 KGRB 070040
TORGRB
WIC085-070115-
/O.NEW.KGRB.TO.W.0007.120707T0040Z-120707T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
740 PM CDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ONEIDA COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 815 PM CDT

* AT 737 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 7 MILES NORTHWEST OF RHINELANDER...AND MOVING
  SOUTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RHINELANDER...STARKS...ENTERPRISE...GAGEN...MONICO AND PELICAN
  LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.

&&

LAT...LON 4569 8972 4582 8956 4567 8904 4556 8905
      4547 8912 4547 8924
TIME...MOT...LOC 0040Z 296DEG 29KT 4569 8947

$$

MPC

2 follow-up statements

932 
WWUS53 KGRB 070052
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
752 PM CDT FRI JUL 6 2012

WIC085-070115-
/O.CON.KGRB.TO.W.0007.000000T0000Z-120707T0115Z/
ONEIDA WI-
752 PM CDT FRI JUL 6 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ONEIDA COUNTY
UNTIL 815 PM CDT...

AT 746 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR MCNAUGHTON...MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  MCNAUGHTON...NEWBOLD...RHINELANDER...AND MONICO.

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 4577 8950 4566 8904 4562 8904 4556 8905
      4547 8912 4547 8924 4569 8964
TIME...MOT...LOC 0051Z 296DEG 29KT 4565 8936

$$

MPC

172 
WWUS53 KGRB 070113
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
813 PM CDT FRI JUL 6 2012

WIC085-070123-
/O.EXP.KGRB.TO.W.0007.000000T0000Z-120707T0115Z/
ONEIDA WI-
813 PM CDT FRI JUL 6 2012

...THE TORNADO WARNING FOR SOUTHEASTERN ONEIDA COUNTY WILL EXPIRE AT
815 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER...GUSTY WINDS UP TO 50 MPH ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

LAT...LON 4577 8950 4566 8904 4562 8904 4556 8905
      4547 8912 4547 8924 4569 8964
TIME...MOT...LOC 0113Z 296DEG 29KT 4557 8913

$$

MPC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:05 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	40 min
Jul 6, 9:11 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Oneida, Vilas	35 min
Jul 7, 3:03 AM CDT	Small Craft Advisory	GRB		12 hr

Nearby

Tornado Warnings in Wisconsin, 2012 Every tornado warning in 2012 Tornadoes in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.