Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 67, NWS Green Bay, WI

July 6, 2012Oneida County, Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 6, 2012, 7:05 PM CDT for Oneida County, Vilas County, Wisconsin. It was in force for 40 min. 2 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: Jul 6, 2012, 7:05 PM CDT (00:05 UTC)
Expired: Jul 6, 2012, 7:45 PM CDT
In force: 40 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Oneida County, WI, Vilas County, WI

The radar

The Marquette radar (KMQT), 164 km from the middle of the area, began a volume at 00:06 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
Jul 6, 7:20 PM CDT	HAIL 0.5	Hazelhurst, WI	BY LAKE KATHRINE.
Jul 6, 7:24 PM CDT	HAIL 0.88	Hazelhurst, WI	LAKE KATHERINE OBSERVER

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
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, 0.1 hours before the alert went out and 179 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.

354 
WUUS53 KGRB 070005
SVRGRB
WIC085-125-070045-
/O.NEW.KGRB.SV.W.0067.120707T0005Z-120707T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
705 PM CDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ONEIDA COUNTY IN NORTH CENTRAL WISCONSIN...
  SOUTH CENTRAL VILAS COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 745 PM CDT

* AT 704 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED 14 MILES SOUTHEAST OF LAC DU FLAMBEAU...OR 19 MILES WEST OF
  EAGLE RIVER...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RHINELANDER...GOODNOW...LAKE TOMAHAWK...MC NAUGHTON...ST GERMAIN...
  SUGAR CAMP...CLEARWATER LAKE AND THREE LAKES.

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 4587 8905 4557 8913 4575 9004 4596 8973
TIME...MOT...LOC 0005Z 280DEG 30KT 4585 8962
WIND...HAIL 60MPH 1.50IN

$$

MPC

4 follow-up statements

390 
WWUS53 KGRB 070020
SVSGRB

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

WIC125-070030-
/O.CAN.KGRB.SV.W.0067.000000T0000Z-120707T0045Z/
VILAS WI-
720 PM CDT FRI JUL 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL VILAS COUNTY IS
CANCELLED...

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

LAT...LON 4575 9004 4590 8968 4590 8966 4590 8965
      4588 8930 4586 8930 4586 8924 4585 8918
      4588 8917 4587 8905 4557 8913
TIME...MOT...LOC 0020Z 280DEG 30KT 4583 8944

$$

WIC085-070045-
/O.CON.KGRB.SV.W.0067.000000T0000Z-120707T0045Z/
ONEIDA WI-
720 PM CDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
ONEIDA COUNTY UNTIL 745 PM CDT...

AT 718 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
MILES SOUTHWEST OF EAGLE RIVER...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  RHINELANDER...SUGAR CAMP...CLEARWATER LAKE...THREE LAKES AND
  STARKS.

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 4575 9004 4590 8968 4590 8966 4590 8965
      4588 8930 4586 8930 4586 8924 4585 8918
      4588 8917 4587 8905 4557 8913
TIME...MOT...LOC 0020Z 280DEG 30KT 4583 8944
WIND...HAIL 60MPH 1.50IN

$$

MPC

314 
WWUS53 KGRB 070032
SVSGRB

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

WIC085-070045-
/O.CON.KGRB.SV.W.0067.000000T0000Z-120707T0045Z/
ONEIDA WI-
732 PM CDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
ONEIDA COUNTY UNTIL 745 PM CDT...

AT 728 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 8 MILES
SOUTHWEST OF EAGLE RIVER...MOVING EAST AT 35 MPH.

IN ADDITION...AT 720 PM...NICKEL SIZE HAIL WAS REPORTED IN HAZELHURST WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  CLEARWATER LAKE...THREE LAKES AND STARKS.

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 4575 9004 4587 8961 4588 8930 4586 8930
      4586 8924 4585 8918 4588 8917 4587 8905
      4557 8913
TIME...MOT...LOC 0032Z 280DEG 30KT 4581 8930
WIND...HAIL 60MPH 1.00IN

$$

MPC

262 
WWUS53 KGRB 070035
SVSGRB

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

WIC085-070045-
/O.CON.KGRB.SV.W.0067.000000T0000Z-120707T0045Z/
ONEIDA WI-
735 PM CDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
ONEIDA COUNTY UNTIL 745 PM CDT...

AT 732 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 9 MILES
NORTHWEST OF RHINELANDER...MOVING SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MCNAUGHTON...RHINELANDER.

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.

DUE TO THE NATURE OF THESE DANGEROUS STORMS...THEY ARE CAPABLE OF
PRODUCING ALL TYPES OF SEVERE WEATHER...INCLUDING EXTREMELY LARGE
HAIL...DESTRUCTIVE STRAIGHT LINE WINDS AND POSSIBLY TORNADOES. BE
PREPARED TO ACT QUICKLY SHOULD A TORNADO OCCUR OR A TORNADO WARNING
BE ISSUED.

&&

LAT...LON 4575 8996 4585 8958 4583 8906 4557 8913
TIME...MOT...LOC 0035Z 309DEG 25KT 4572 8950
WIND...HAIL 60MPH 1.00IN

$$

MPC

315 
WWUS53 KGRB 070041
SVSGRB

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

WIC085-070051-
/O.EXP.KGRB.SV.W.0067.000000T0000Z-120707T0045Z/
ONEIDA WI-
741 PM CDT FRI JUL 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ONEIDA COUNTY IS HAS 
BEEN REPLACED BY A TORNADO WARNING...

PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER
INFORMATION.

REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN ONEIDA 
COUNTY UNTIL 815 PM.

LAT...LON 4575 8996 4585 8958 4583 8906 4557 8913
TIME...MOT...LOC 0041Z 309DEG 25KT 4569 8945

$$

MPC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:40 PM CDT	Tornado Warning	GRB	Oneida	35 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

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.