Alert archive / Wisconsin / Tornado Warnings in 2012

Tornado Warning 4, NWS Green Bay, WI

June 18, 2012Marathon County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jun 18, 2012, 3:22 PM CDT for Marathon County, Wisconsin. It was in force for 23 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: Jun 18, 2012, 3:22 PM CDT (20:22 UTC)
Expired: Jun 18, 2012, 3:45 PM CDT
In force: 23 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

County Marathon County, WI

The radar

The Green Bay radar (KGRB), 129 km from the middle of the area, began a volume at 20:22 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
Jun 18, 12:24 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.4 hours before the alert went out and 131 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: 67 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 382 m²/s²
0-3 km storm-relative helicity: 524 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

014 
WFUS53 KGRB 182022
TORGRB
WIC073-182045-
/O.NEW.KGRB.TO.W.0004.120618T2022Z-120618T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
322 PM CDT MON JUN 18 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MARATHON COUNTY IN CENTRAL WISCONSIN...

* UNTIL 345 PM CDT

* AT 318 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 9 MILES WEST OF RIB MOUNTAIN...OR 12 MILES WEST
  OF WAUSAU...AND MOVING EAST AT 45 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  RIB MOUNTAIN AROUND 330 PM CDT.
  WAUSAU AND WESTON AROUND 335 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE RIB MOUNTAIN
STATE PARK...EVERGREEN...ROTHSCHILD...SCHOFIELD...NUTTERVILLE AND
RINGLE.

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 4508 8951 4498 8949 4484 8935 4476 8988
      4496 8997
TIME...MOT...LOC 2022Z 257DEG 40KT 4491 8979

$$

EB

2 follow-up statements

675 
WWUS53 KGRB 182030
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
330 PM CDT MON JUN 18 2012

WIC073-182045-
/O.CON.KGRB.TO.W.0004.000000T0000Z-120618T2045Z/
MARATHON WI-
330 PM CDT MON JUN 18 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MARATHON COUNTY
UNTIL 345 PM CDT...

AT 326 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED 3 MILES WEST OF RIB MOUNTAIN...OR 6 MILES 
SOUTHWEST OF WAUSAU...MOVING EAST AT 45 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  RIB MOUNTAIN AROUND 335 PM CDT.
  ROTHSCHILD AROUND 340 PM CDT.

THIS IS A DANGEROUS STORM!

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 4478 8979 4498 8987 4508 8951 4498 8949
      4484 8935
TIME...MOT...LOC 2028Z 257DEG 40KT 4492 8970

$$

EB

392 
WWUS53 KGRB 182034
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
334 PM CDT MON JUN 18 2012

WIC073-182045-
/O.CON.KGRB.TO.W.0004.000000T0000Z-120618T2045Z/
MARATHON WI-
334 PM CDT MON JUN 18 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MARATHON COUNTY 
UNTIL 345 PM CDT...

AT 331 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED NEAR RIB MOUNTAIN...OR SOUTH OF WAUSAU...MOVING 
EAST AT 45 MPH.

RADAR INDICATED STRONG ROTATION. THIS IS A VERY DANGEROUS STORM!  
TAKE COVER IMMEDIATELY!

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 4479 8972 4500 8979 4508 8951 4498 8949
      4484 8935
TIME...MOT...LOC 2033Z 257DEG 40KT 4493 8962

$$

EB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:03 AM CDT	Special Marine Warning	GRB		87 min
Jun 18, 1:34 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Oneida	56 min
Jun 18, 2:14 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	46 min
Jun 18, 2:28 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Lincoln, Oconto	47 min
Jun 18, 2:58 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	47 min
Jun 18, 3:28 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Portage, Shawano, Waupaca	47 min
Jun 18, 3:41 PM CDT	Tornado Warning	GRB	Langlade, Marathon, Menominee, Shawano	34 min
Jun 18, 3:44 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	31 min
Jun 18, 3:47 PM CDT	Special Marine Warning	GRB		88 min
Jun 18, 3:48 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Shawano	42 min
Jun 18, 3:55 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Portage, Shawano, Waupaca	41 min
Jun 18, 3:58 PM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	47 min
Jun 18, 4:07 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Shawano	20 min
Jun 18, 4:19 PM CDT	Tornado Warning	GRB	Marinette, Oconto	26 min
Jun 18, 4:45 PM CDT	Special Marine Warning	GRB		90 min
Jun 18, 4:51 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Winnebago	39 min
Jun 18, 5:12 PM CDT	Special Marine Warning	GRB		75 min
Jun 18, 5:30 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Calumet, Manitowoc, Outagamie, Winnebago	45 min
Jun 18, 5:31 PM CDT	Special Marine Warning	GRB		89 min
Jun 18, 6:08 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Manitowoc, Winnebago	37 min

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.