Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 39, NWS Green Bay, WI

June 18, 20124 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 18, 2012, 3:55 PM CDT for 4 counties in Wisconsin. It was in force for 41 min. 5 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: Jun 18, 2012, 3:55 PM CDT (20:55 UTC)
Expired: Jun 18, 2012, 4:36 PM CDT
In force: 41 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Outagamie County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 74 km from the middle of the area, began a volume at 20:57 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
Jun 18, 4:05 PM CDT	HAIL 0.5	Waupaca, WI	SLIGHTLY LARGER THAN A HALF INCH
Jun 18, 4:09 PM CDT	HAIL 1	King, WI
Jun 18, 4:09 PM CDT	HAIL 1.25	Clintonville, WI
Jun 18, 4:10 PM CDT	HAIL 1	Clintonville, WI
Jun 18, 4:11 PM CDT	HAIL 0.75	Waupaca, 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.

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, 8.9 hours before the alert went out and 75 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.

345 
WUUS53 KGRB 182055
SVRGRB
WIC087-097-115-135-182145-
/O.NEW.KGRB.SV.W.0039.120618T2055Z-120618T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
355 PM CDT MON JUN 18 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OUTAGAMIE COUNTY IN NORTHEAST WISCONSIN...
  SOUTHEASTERN PORTAGE COUNTY IN CENTRAL WISCONSIN...
  SHAWANO COUNTY IN NORTHEAST WISCONSIN...
  WAUPACA COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 445 PM CDT

* AT 352 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  SOUTH OF AMHERST...OR 11 MILES WEST OF WAUPACA...AND MOVING EAST AT
  50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAUPACA...NEW LONDON...CLINTONVILLE...BLACK CREEK...SHERIDAN...
  RURAL...KING AND LIND CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4441 8941 4455 8913 4471 8848 4447 8832
      4424 8917 4424 8935
TIME...MOT...LOC 2055Z 248DEG 45KT 4436 8923
WIND...HAIL 60MPH 1.75IN

$$

MPC

4 follow-up statements

586 
WWUS53 KGRB 182108
SVSGRB

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

WIC087-097-115-135-182145-
/O.CON.KGRB.SV.W.0039.000000T0000Z-120618T2145Z/
OUTAGAMIE WI-WAUPACA WI-SHAWANO WI-PORTAGE WI-
408 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PORTAGE...SHAWANO...WAUPACA AND NORTHERN OUTAGAMIE COUNTIES UNTIL 445
PM CDT...

AT 405 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
WAUPACA...MOVING EAST AT 50 MPH.

IN ADDITION...AT 4 PM DIME SIZED HAIL WAS REPORTED IN WAUPACA WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  NEW LONDON...CLINTONVILLE...BLACK CREEK...WEYAUWEGA...WHITE LAKE...
  MANAWA...SYMCO AND ROYALTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4441 8941 4455 8913 4471 8848 4447 8832
      4424 8917 4424 8935
TIME...MOT...LOC 2108Z 258DEG 45KT 4436 8900
WIND...HAIL 60MPH 1.00IN

$$

MPC

073 
WWUS53 KGRB 182117 RRA
SVSGRB

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

WIC087-097-115-135-182145-
/O.CON.KGRB.SV.W.0039.000000T0000Z-120618T2145Z/
OUTAGAMIE WI-WAUPACA WI-SHAWANO WI-PORTAGE WI-
417 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PORTAGE...SHAWANO...WAUPACA AND NORTHERN OUTAGAMIE COUNTIES UNTIL 445
PM CDT...

AT 414 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
WEST OF NEW LONDON...OR 8 MILES EAST OF WAUPACA...MOVING EAST AT 50
MPH.

IN ADDITION...AT 409 PM...QUARTER SIZED HAIL WAS REPORTED IN WAUPACA 
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  NEW LONDON...CLINTONVILLE...BLACK CREEK...NORTHPORT...SUGAR BUSH...
  BEAR CREEK...SHIOCTON AND LEEMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4424 8935 4431 8931 4454 8901 4471 8848
      4447 8832 4424 8917
TIME...MOT...LOC 2116Z 258DEG 45KT 4438 8886
WIND...HAIL 60MPH 1.00IN

$$

MPC

733 
WWUS53 KGRB 182132
SVSGRB

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

WIC097-182142-
/O.CAN.KGRB.SV.W.0039.000000T0000Z-120618T2145Z/
PORTAGE WI-
432 PM CDT MON JUN 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PORTAGE COUNTY IS
CANCELLED...

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

LAT...LON 4424 8920 4454 8901 4471 8848 4447 8832
TIME...MOT...LOC 2132Z 258DEG 45KT 4442 8859

$$

WIC087-115-135-182145-
/O.CON.KGRB.SV.W.0039.000000T0000Z-120618T2145Z/
OUTAGAMIE WI-WAUPACA WI-SHAWANO WI-
432 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SHAWANO...
WAUPACA AND NORTHERN OUTAGAMIE COUNTIES UNTIL 445 PM CDT...

AT 430 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
EAST OF NEW LONDON...OR 15 MILES NORTHWEST OF APPLETON...MOVING EAST
AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  BLACK CREEK...LEEMAN...NAVARINO...NICHOLS AND BRIARTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND DEADLY
LIGHTNING. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4424 8920 4454 8901 4471 8848 4447 8832
TIME...MOT...LOC 2132Z 258DEG 45KT 4442 8859
WIND...HAIL 60MPH 1.00IN

$$

MPC

120 
WWUS53 KGRB 182136
SVSGRB

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

WIC087-115-135-182146-
/O.CAN.KGRB.SV.W.0039.000000T0000Z-120618T2145Z/
OUTAGAMIE WI-WAUPACA WI-SHAWANO WI-
436 PM CDT MON JUN 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR SHAWANO...WAUPACA AND NORTHERN
OUTAGAMIE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED 
AREA.  GUSTY WINDS UP TO 40 MPH AND SMALL HAIL WILL STILL BE 
POSSIBLE WITH THESE STORMS.

LAT...LON 4424 8920 4454 8901 4471 8848 4447 8832
TIME...MOT...LOC 2136Z 258DEG 45KT 4443 8852

$$

MPC

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, 3:22 PM CDT	Tornado Warning	GRB	Marathon	23 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, 3:58 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

Severe Thunderstorm Warnings in Wisconsin, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.