Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Green Bay, WI

May 6, 2012Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 6, 2012, 6:35 AM CDT for Portage County, Wood County, Wisconsin. It was in force for 40 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: May 6, 2012, 6:35 AM CDT (11:35 UTC)
Expired: May 6, 2012, 7:15 AM CDT
In force: 40 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Portage County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 103 km from the middle of the area, began a volume at 11:38 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
May 6, 6:50 AM CDT	HAIL 0.25	Pittsville, WI
May 6, 6:50 AM CDT	HAIL 0.75	Pittsville, WI
May 6, 7:15 AM CDT	HAIL 0.25	Wisconsin Rapids, WI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 11.6 hours before the alert went out and 164 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

974 
WUUS53 KGRB 061135
SVRGRB
WIC097-141-061215-
/O.NEW.KGRB.SV.W.0004.120506T1135Z-120506T1215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
635 AM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN PORTAGE COUNTY IN CENTRAL WISCONSIN...
  WOOD COUNTY IN CENTRAL WISCONSIN...

* UNTIL 715 AM CDT

* AT 629 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHWEST OF MARSHFIELD
  TO BABCOCK...AND MOVING EAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PITTSVILLE AROUND 640 AM CDT.
  WISCONSIN RAPIDS AROUND 715 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
DEXTERVILLE...HEWITT...BETHEL...ARPIN...AUBURNDALE...VESPER...
SHERRY...NEKOOSA...BLENKER AND PORT EDWARDS.

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 4434 9032 4468 9032 4468 8974 4424 8968
      4424 9031 4425 9032 4434 9033
TIME...MOT...LOC 1135Z 269DEG 21KT 4456 9021 4425 9014
WIND...HAIL 60MPH 1.00IN

$$

SKOWRONSKI

3 follow-up statements

165 
WWUS53 KGRB 061146
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
646 AM CDT SUN MAY 6 2012

WIC097-141-061215-
/O.CON.KGRB.SV.W.0004.000000T0000Z-120506T1215Z/
PORTAGE WI-WOOD WI-
646 AM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WOOD AND
WESTERN PORTAGE COUNTIES UNTIL 715 AM CDT...

AT 643 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF MARSHFIELD TO 6
MILES EAST OF BABCOCK...MOVING EAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  WISCONSIN RAPIDS AROUND 700 AM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE ARPIN...
AUBURNDALE...VESPER...NEKOOSA...BLENKER...SHERRY...PORT EDWARDS...
MILLADORE...RUDOLPH AND KELLNER.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS.

&&

LAT...LON 4434 9032 4468 9032 4468 8974 4424 8968
      4424 9031 4425 9032 4434 9033
TIME...MOT...LOC 1144Z 265DEG 29KT 4457 9010 4426 9001
WIND...HAIL 60MPH 1.00IN

$$

SKOWRONSKI

208 
WWUS53 KGRB 061158
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
658 AM CDT SUN MAY 6 2012

WIC097-141-061215-
/O.CON.KGRB.SV.W.0004.000000T0000Z-120506T1215Z/
PORTAGE WI-WOOD WI-
658 AM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WOOD AND
WESTERN PORTAGE COUNTIES UNTIL 715 AM CDT...

AT 655 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 11 MILES SOUTHEAST OF MARSHFIELD
TO NEW ROME...MOVING EAST AT 35 MPH.

THE POTENTIAL FOR LARGE HAIL HAD DIMINISHED SOME DURING THE PAST 15 
MINUTES...BUT THE POTENTIAL FOR DAMAGING WIND GUSTS CONTINUES. 

SEVERE THUNDERSTORMS WILL AFFECT MILLADORE...RUDOLPH...KELLNER... 
JUNCTION CITY AND BIRON.

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 8968 4424 9022 4445 9017 4468 9024
      4468 8974
TIME...MOT...LOC 1156Z 265DEG 29KT 4458 8996 4427 8988
WIND...HAIL 60MPH 1.00IN

$$

SKOWRONSKI

435 
WWUS53 KGRB 061211
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
711 AM CDT SUN MAY 6 2012

WIC097-141-061220-
/O.EXP.KGRB.SV.W.0004.000000T0000Z-120506T1215Z/
PORTAGE WI-WOOD WI-
711 AM CDT SUN MAY 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR WOOD AND WESTERN PORTAGE
COUNTIES WILL EXPIRE AT 715 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING WAS WEAKENING. THE 
SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 715 AM...AND IT IS NOT 
ANTICIPATED THAT A NEW WARNING WILL BE NEEDED BEYOND THAT POINT. 
HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE AS THE STORMS 
CONTINUE TO WORK EAST ACROSS CENTRAL WISCONSIN.

LAT...LON 4424 8968 4424 9022 4445 9017 4468 9024
      4468 8974
TIME...MOT...LOC 1210Z 265DEG 29KT 4459 8980 4428 8972

$$

SKOWRONSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 3:46 AM CDT	Flood Watch	GRB	Calumet, Manitowoc, Winnebago	15 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.