Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Green Bay, WI

July 4, 2012Florence County, Forest County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 4, 2012, 7:44 PM CDT for Florence County, Forest County, Wisconsin. It was in force for 46 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 4, 2012, 7:44 PM CDT (00:44 UTC)
Expired: Jul 4, 2012, 8:30 PM CDT
In force: 46 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Florence County, WI, Forest County, WI

The radar

The Marquette radar (KMQT), 101 km from the middle of the area, began a volume at 00:44 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.7 hours before the alert went out and 162 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: 5454 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 13.0

Open this sounding in Storm Lab

The text

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

886 
WUUS53 KGRB 050044
SVRGRB
WIC037-041-050145-
/O.NEW.KGRB.SV.W.0065.120705T0044Z-120705T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
744 PM CDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FLORENCE COUNTY IN NORTHEAST WISCONSIN...
  NORTHERN FOREST COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 845 PM CDT

* AT 738 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM AMASA TO 6 MILES NORTHWEST OF TIPLER TO 10 MILES SOUTHEAST OF
  EAGLE RIVER...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TIPLER...FLORENCE...LONG LAKE...NEWALD...COMMONWEALTH...SPREAD
  EAGLE...FENCE AND AURORA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE FOR WINDS OF 60 MPH OR
STRONGER. IF INDOORS...STAY AWAY FROM WINDOWS. IF OUTSIDE...QUICKLY
MOVE TO A STURDY SHELTER.

IF ON A LAKE GET OUT OF THE WATER AND MOVE INDOORS OR INSIDE A 
VEHICLE. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING. IN ADDITION...THUNDERSTORMS CAN PRODUCE LARGE 
CAPSIZING WAVES...EVEN ON SMALL BODIES OF WATER.  MOVE INTO DOCK 
AND SEEK SAFE SHELTER NOW. DON'T BE CAUGHT ON THE WATER IN A 
THUNDERSTORM.

&&

LAT...LON 4603 8882 4602 8868 4599 8866 4602 8861
      4602 8851 4600 8849 4599 8837 4596 8832
      4593 8810 4587 8807 4581 8813 4578 8805
      4573 8806 4571 8810 4572 8842 4566 8843
      4578 8905 4598 8905 4598 8894 4607 8893
TIME...MOT...LOC 0042Z 285DEG 38KT 4625 8843 4597 8864
          4584 8900
WIND...HAIL 60MPH <.75IN

$$

TH

3 follow-up statements

809 
WWUS53 KGRB 050059
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
759 PM CDT WED JUL 4 2012

WIC037-041-050145-
/O.CON.KGRB.SV.W.0065.000000T0000Z-120705T0145Z/
FLORENCE WI-FOREST WI-
759 PM CDT WED JUL 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
FOREST AND FLORENCE COUNTIES UNTIL 845 PM CDT...

AT 754 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 7 MILES WEST OF CHANNING TO 9 MILES WEST OF FLORENCE TO 13 MILES
SOUTHWEST OF TIPLER...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  FLORENCE...NEWALD...COMMONWEALTH...FENCE...SPREAD EAGLE AND AURORA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4603 8882 4602 8868 4599 8866 4602 8861
      4602 8851 4600 8849 4599 8837 4596 8832
      4593 8810 4587 8807 4581 8813 4578 8805
      4573 8806 4571 8810 4572 8842 4566 8843
      4578 8905 4598 8905 4598 8894 4607 8893
TIME...MOT...LOC 0058Z 285DEG 38KT 4615 8816 4587 8837
          4575 8873
WIND...HAIL 60MPH <.75IN

$$

TH

753 
WWUS53 KGRB 050124
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
824 PM CDT WED JUL 4 2012

WIC037-041-050145-
/O.CON.KGRB.SV.W.0065.000000T0000Z-120705T0145Z/
FLORENCE WI-FOREST WI-
824 PM CDT WED JUL 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
FOREST AND FLORENCE COUNTIES UNTIL 845 PM CDT...

AT 820 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 6 MILES NORTH OF FELCH TO IRON MOUNTAIN TO 5 MILES NORTHWEST OF
GOODMAN...MOVING EAST AT 45 MPH.

IN ADDITION...STRONG WINDS FROM THESE STORMS CREATED POWER OUTAGES 
IN BOULDER JUNCTION EARLIER THIS EVENING.

LOCATIONS IMPACTED INCLUDE...
  IRON MOUNTAIN.
  HOMESTEAD.
  MORGAN LAKE CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE FOR WINDS OF 60 MPH OR
STRONGER. IF INDOORS...STAY AWAY FROM WINDOWS. IF OUTSIDE...QUICKLY
MOVE TO A STURDY SHELTER.

&&

LAT...LON 4602 8851 4600 8849 4600 8844 4598 8842
      4599 8837 4596 8832 4593 8810 4589 8810
      4587 8807 4581 8813 4578 8805 4573 8806
      4571 8810 4572 8842 4566 8843 4571 8867
TIME...MOT...LOC 0123Z 285DEG 38KT 4608 8779 4580 8800
          4568 8836
WIND...HAIL 60MPH <.75IN

$$

MPC

277 
WWUS53 KGRB 050130
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
830 PM CDT WED JUL 4 2012

WIC037-041-050140-
/O.CAN.KGRB.SV.W.0065.000000T0000Z-120705T0145Z/
FLORENCE WI-FOREST WI-
830 PM CDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FOREST AND
FLORENCE COUNTIES IS CANCELLED...

THE LINE OF STORMS 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 40 MPH ARE STILL POSSIBLE WITH 
THESE THUNDERSTORMS.

LAT...LON 4602 8851 4600 8849 4600 8844 4598 8842
      4599 8837 4596 8832 4593 8810 4589 8810
      4587 8807 4581 8813 4578 8805 4573 8806
      4571 8810 4572 8842 4566 8843 4571 8867
TIME...MOT...LOC 0130Z 285DEG 38KT 4606 8769 4578 8790
          4566 8826

$$

MPC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 8:11 PM CDT	Special Marine Warning	GRB		64 min
Jul 4, 10:00 PM CDT	Severe Thunderstorm Warning	GRB	Door, Kewaunee	15 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.