Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Green Bay, WI

July 30, 2012Brown County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2012, 7:11 PM CDT for Brown County, Wisconsin. It was in force for 49 min. 4 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 30, 2012, 7:11 PM CDT (00:11 UTC)
Expired: Jul 30, 2012, 8:00 PM CDT
In force: 49 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Brown County, WI

The radar

The Green Bay radar (KGRB), 24 km from the middle of the area, began a volume at 00:12 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 30, 7:12 PM CDT	HAIL 1	Wrightstown, WI	HAIL BEGAN AT 710 PM AND ENDED AT 712 PM.
Jul 30, 7:25 PM CDT	HAIL 0.75	Morrison, WI
Jul 30, 7:28 PM CDT	HAIL 1.75	Greenleaf, WI	WINDSHIELD CRACKED
Jul 30, 7:28 PM CDT	HAIL 1.75	Wrightstown, WI	WINDSHIELD CRACKED

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 30, 1:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 361 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: 693 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

476 
WUUS53 KGRB 310011
SVRGRB
WIC009-310100-
/O.NEW.KGRB.SV.W.0083.120731T0011Z-120731T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
711 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BROWN COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 800 PM CDT

* AT 708 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 6 MILES EAST OF KAUKAUNA...OR 12 MILES EAST OF
  APPLETON...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DENMARK AROUND 745 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
MORRISON...SHIRLEY...WAYSIDE...GLENMORE...LARK AND LANGES CORNERS.

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 4425 8820 4440 8819 4442 8776 4433 8777
      4433 8789 4424 8789 4424 8791 4424 8816
TIME...MOT...LOC 0011Z 271DEG 22KT 4431 8813
WIND...HAIL <50MPH 1.00IN

$$

TH

4 follow-up statements

735 
WWUS53 KGRB 310023
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
723 PM CDT MON JUL 30 2012

WIC009-310100-
/O.CON.KGRB.SV.W.0083.000000T0000Z-120731T0100Z/
BROWN WI-
723 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROWN COUNTY UNTIL 800 PM CDT...

AT 722 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 9 MILES NORTH OF BRILLION...OR 14 MILES SOUTH OF
GREEN BAY...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  DENMARK AROUND 745 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE
MORRISON...SHIRLEY...WAYSIDE...GLENMORE...LARK AND LANGES CORNERS.

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 4440 8807 4442 8777 4441 8776 4433 8777
      4433 8778 4433 8789 4424 8789 4424 8815
TIME...MOT...LOC 0023Z 271DEG 22KT 4431 8803
WIND...HAIL <50MPH 1.00IN

$$

TH

473 
WWUS53 KGRB 310033
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
733 PM CDT MON JUL 30 2012

WIC009-310100-
/O.CON.KGRB.SV.W.0083.000000T0000Z-120731T0100Z/
BROWN WI-
733 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROWN COUNTY UNTIL 800 PM CDT...

AT 731 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING UP TO GOLF BALL SIZE HAIL.  THIS STORM WAS 
LOCATED 7 MILES WEST OF DENMARK...OR 14 MILES SOUTH OF GREEN 
BAY...MOVING EAST AT 25 MPH.

IN ADDITION...AT 728 PM CDT GOLF BALL SIZE HAIL WAS REPORTED IN 
WRIGHTSTOWN WITH THIS STORM.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  DENMARK AROUND 745 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE LANGES
CORNERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. IF INDOORS...STAY AWAY FROM WINDOWS. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING.

&&

LAT...LON 4440 8807 4442 8777 4441 8776 4435 8777
      4433 8778 4433 8789 4424 8789 4424 8815
TIME...MOT...LOC 0032Z 271DEG 22KT 4431 8795
WIND...HAIL <50MPH 1.75IN

$$

TH

533 
WWUS53 KGRB 310047 RRA
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
747 PM CDT MON JUL 30 2012

WIC009-310100-
/O.CON.KGRB.SV.W.0083.000000T0000Z-120731T0100Z/
BROWN WI-
747 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROWN COUNTY UNTIL 800 PM CDT...

AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR DENMARK...OR 16 MILES SOUTHEAST OF GREEN
BAY...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
SOUTHEASTERN BROWN COUNTY.

LAT...LON 4425 8806 4438 8798 4439 8780 4438 8777
      4435 8777 4433 8778 4433 8789 4424 8789
TIME...MOT...LOC 0047Z 271DEG 22KT 4431 8782
WIND...HAIL <50MPH 1.00IN

$$

TH

816 
WWUS53 KGRB 310057
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
757 PM CDT MON JUL 30 2012

WIC009-310107-
/O.EXP.KGRB.SV.W.0083.000000T0000Z-120731T0100Z/
BROWN WI-
757 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BROWN COUNTY WILL
EXPIRE AT 800 PM CDT...

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

LAT...LON 4425 8806 4438 8798 4439 8780 4438 8777
      4435 8777 4433 8778 4433 8789 4424 8789
TIME...MOT...LOC 0057Z 271DEG 22KT 4431 8773

$$

TH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:21 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	54 min
Jul 30, 7:30 PM CDT	Severe Thunderstorm Warning	GRB	Kewaunee	30 min
Jul 30, 7:44 PM CDT	Severe Thunderstorm Warning	GRB	Door	61 min
Jul 30, 8:14 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	46 min
Jul 30, 8:38 PM CDT	Special Marine Warning	GRB		2 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.