Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS Green Bay, WI

July 30, 2012Brown County, Oconto County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2012, 5:28 PM CDT for Brown County, Oconto County, Wisconsin. It was in force for 47 min. 3 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, 5:28 PM CDT (22:28 UTC)
Expired: Jul 30, 2012, 6:15 PM CDT
In force: 47 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Brown County, WI, Oconto County, WI

The radar

The Green Bay radar (KGRB), 36 km from the middle of the area, began a volume at 22:29 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
Jul 30, 5:30 PM CDT	HAIL 2	4 W Sobieski, WI
Jul 30, 5:42 PM CDT	HAIL 1	Little Suamico, WI
Jul 30, 5:57 PM CDT	HAIL 1	1 S Suamico, 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
Jul 30, 1:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.5 hours before the alert went out and 37 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: 455 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

278 
WUUS53 KGRB 302228
SVRGRB
WIC009-083-302315-
/O.NEW.KGRB.SV.W.0076.120730T2228Z-120730T2315Z/

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

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BROWN COUNTY IN NORTHEAST WISCONSIN...
  OCONTO COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 615 PM CDT

* AT 525 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7
  MILES WEST OF OCONTO TO PULASKI...AND MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  OCONTO AROUND 540 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
SOBIESKI...BROOKSIDE...SUAMICO...CULLEN...COUNTY LINE...PENSAUKEE AND
LITTLE SUAMICO.

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 4493 8783 4487 8782 4481 8790 4472 8798
      4465 8797 4466 8799 4463 8800 4459 8797
      4460 8801 4459 8802 4459 8824 4486 8825
      4502 8812 4501 8794 4499 8794 4499 8776
      4496 8775
TIME...MOT...LOC 2228Z 270DEG 27KT 4492 8797 4468 8815
WIND...HAIL <50MPH 1.00IN

$$

TH

3 follow-up statements

877 
WWUS53 KGRB 302244
SVSGRB

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

WIC009-083-302315-
/O.CON.KGRB.SV.W.0076.000000T0000Z-120730T2315Z/
BROWN WI-OCONTO WI-
544 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OCONTO AND
NORTHWESTERN BROWN COUNTIES UNTIL 615 PM CDT...

AT 539 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE 
THUNDERSTORMS PRODUCING UP TO 2 INCH SIZE HAIL.  THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM OCONTO TO 10 MILES EAST OF 
PULASKI...MOVING EAST AT 30 MPH.

IN ADDITION...AT 530 PM CDT...2 INCH HAIL WAS REPORTED NEAR THE TOWN 
OF SOBIESKI.

SEVERE THUNDERSTORM WILL AFFECT THE LITTLE SUAMICO AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. MOVE TO AN INTERIOR ROOM OF YOUR HOME OR
BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4483 8809 4487 8797 4487 8782 4481 8790
      4472 8798 4465 8797 4466 8799 4463 8800
      4459 8797 4460 8801 4459 8802 4459 8824
TIME...MOT...LOC 2242Z 270DEG 27KT 4485 8787 4468 8800
WIND...HAIL <50MPH 1.75IN

$$

TH

886 
WWUS53 KGRB 302254
SVSGRB

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

WIC009-083-302315-
/O.CON.KGRB.SV.W.0076.000000T0000Z-120730T2315Z/
BROWN WI-OCONTO WI-
554 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
OCONTO AND NORTH CENTRAL BROWN COUNTIES UNTIL 615 PM CDT...

AT 553 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PING PONG BALL SIZE
HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES
EAST OF OCONTO TO 13 MILES NORTHEAST OF GREEN BAY...MOVING EAST AT 30
MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL
BROWN AND SOUTHERN OCONTO COUNTIES.

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 4459 8818 4473 8803 4482 8797 4481 8790
      4472 8798 4465 8797 4466 8799 4463 8800
      4459 8797 4460 8801 4459 8802
TIME...MOT...LOC 2254Z 270DEG 27KT 4485 8774 4468 8787
WIND...HAIL <50MPH 1.50IN

$$

TH

103 
WWUS53 KGRB 302312
SVSGRB

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

WIC009-083-302320-
/O.EXP.KGRB.SV.W.0076.000000T0000Z-120730T2315Z/
BROWN WI-OCONTO WI-
612 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OCONTO AND FAR 
NORTHWEST BROWN COUNTIES WILL EXPIRE AT 615 PM CDT...

A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR CENTRAL 
AND SOUTHEAST PORTIONS OF BROWN COUNTY. 

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.

LAT...LON 4459 8818 4473 8803 4482 8797 4481 8790
      4472 8798 4465 8797 4466 8799 4463 8800
      4459 8797 4460 8801 4459 8802
TIME...MOT...LOC 2310Z 270DEG 27KT 4485 8757 4468 8770

$$

TH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 4:36 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	24 min
Jul 30, 5:32 PM CDT	Special Marine Warning	GRB		51 min
Jul 30, 5:50 PM CDT	Severe Thunderstorm Warning	GRB	Brown	40 min
Jul 30, 5:58 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Door, Kewaunee	62 min
Jul 30, 6:04 PM CDT	Special Marine Warning	GRB		86 min
Jul 30, 6:06 PM CDT	Severe Thunderstorm Warning	GRB	Door	39 min
Jul 30, 6:36 PM CDT	Severe Thunderstorm Warning	GRB	Brown	39 min
Jul 30, 6:44 PM CDT	Severe Thunderstorm Warning	GRB	Door	61 min
Jul 30, 6:49 PM CDT	Special Marine Warning	GRB		116 min
Jul 30, 6:53 PM CDT	Severe Thunderstorm Warning	GRB	Kewaunee, Manitowoc	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.