Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 35, NWS Green Bay, WI

June 18, 2012Marathon County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 18, 2012, 2:58 PM CDT for Marathon County, Wisconsin. It was in force for 47 min. 1 report 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: Jun 18, 2012, 2:58 PM CDT (19:58 UTC)
Expired: Jun 18, 2012, 3:45 PM CDT
In force: 47 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

County Marathon County, WI

The radar

The Green Bay radar (KGRB), 155 km from the middle of the area, began a volume at 20:01 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
Jun 18, 3:08 PM CDT	HAIL 1.25	Brokaw, 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
Jun 18, 12:24 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.0 hours before the alert went out and 156 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: 67 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 382 m²/s²
0-3 km storm-relative helicity: 524 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

490 
WUUS53 KGRB 181958
SVRGRB
WIC073-182045-
/O.NEW.KGRB.SV.W.0035.120618T1958Z-120618T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
258 PM CDT MON JUN 18 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARATHON COUNTY IN CENTRAL WISCONSIN...

* UNTIL 345 PM CDT

* AT 252 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
  LOCATED 11 MILES WEST OF RIB MOUNTAIN...OR 13 MILES WEST OF
  WAUSAU...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WAUSAU AROUND 310 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
BROKAW...NUTTERVILLE...SUNSET AND HOGARTY.

THIS WARNING REPLACES THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR 
PARTS OF MARATHON AND LINCOLN COUNTIES.

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.

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 4503 9032 4504 9020 4505 9020 4512 8975
      4512 8923 4485 8923 4468 9031
TIME...MOT...LOC 1957Z 253DEG 35KT 4499 8983
WIND...HAIL 70MPH 1.50IN

$$

EB

3 follow-up statements

399 
WWUS53 KGRB 182008
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
308 PM CDT MON JUN 18 2012

WIC073-182045-
/O.CON.KGRB.SV.W.0035.000000T0000Z-120618T2045Z/
MARATHON WI-
308 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MARATHON
COUNTY UNTIL 345 PM CDT...

AT 301 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 6
MILES WEST OF WAUSAU...MOVING EAST AT 40 MPH.

ANOTHER SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTH OF STRATFORD 
MOVING EAST AT 45 MPH

THE SEVERE THUNDERSTORMS WILL AFFECT EDGAR...WAUSAU...BROKAW AND RIB 
MOUNTAIN. 

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.

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 4505 9020 4512 8975 4512 8923 4485 8923
      4470 9020
TIME...MOT...LOC 2006Z 253DEG 35KT 4502 8971
WIND...HAIL 70MPH 1.00IN

$$

EB

251 
WWUS53 KGRB 182013
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
313 PM CDT MON JUN 18 2012

WIC073-182045-
/O.CON.KGRB.SV.W.0035.000000T0000Z-120618T2045Z/
MARATHON WI-
313 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MARATHON
COUNTY UNTIL 345 PM CDT...

AT 309 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS 
OF 70 MPH AND LARGE HAIL. THIS STORM WAS LOCATED NEAR 
WAUSAU...MOVING EAST AT 45 MPH.

A SPOTTER REPORTED ONE AND A QUARTER INCH HAIL IN BROKAW AT 308 PM 
CDT.

LOCATIONS IMPACTED INCLUDE...
  NUTTERVILLE...SUNSET...RINGLE...HATLEY...HOGARTY AND NORRIE.

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.

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 4507 9010 4512 8975 4512 8923 4485 8923
      4471 9011
TIME...MOT...LOC 2012Z 264DEG 42KT 4500 8956
WIND...HAIL 70MPH <.75IN

$$

EB

197 
WWUS53 KGRB 182020
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
320 PM CDT MON JUN 18 2012

WIC073-182045-
/O.CON.KGRB.SV.W.0035.000000T0000Z-120618T2045Z/
MARATHON WI-
320 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MARATHON 
COUNTY UNTIL 345 PM CDT...

AT 314 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 12
MILES WEST OF RIB MOUNTAIN...OR 15 MILES SOUTHWEST OF WAUSAU...MOVING
EAST AT 50 MPH.  THIS STORM HAS ALSO EXHIBITED WEAK ROTATION.

ANOTHER SEVERE THUNDERSTORM WAS LOCATED JUST EAST OF WAUSAU MOVING 
EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  WAUSAU...RIB MOUNTAIN...WESTON...MARATHON CITY...LITTLE CHICAGO...
  RIB MOUNTAIN STATE PARK...EVERGREEN AND BROKAW.

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.

THESE STORMS HAVE 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 4508 9001 4512 8975 4512 8923 4485 8923
      4473 9001
TIME...MOT...LOC 2018Z 264DEG 42KT 4488 8985
WIND...HAIL 70MPH 1.00IN

$$

EB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:03 AM CDT	Special Marine Warning	GRB		87 min
Jun 18, 1:34 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Oneida	56 min
Jun 18, 2:14 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	46 min
Jun 18, 2:28 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Lincoln, Oconto	47 min
Jun 18, 3:22 PM CDT	Tornado Warning	GRB	Marathon	23 min
Jun 18, 3:28 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Portage, Shawano, Waupaca	47 min
Jun 18, 3:41 PM CDT	Tornado Warning	GRB	Langlade, Marathon, Menominee, Shawano	34 min
Jun 18, 3:44 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	31 min
Jun 18, 3:47 PM CDT	Special Marine Warning	GRB		88 min
Jun 18, 3:48 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Shawano	42 min
Jun 18, 3:55 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Portage, Shawano, Waupaca	41 min
Jun 18, 3:58 PM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	47 min
Jun 18, 4:07 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Shawano	20 min
Jun 18, 4:19 PM CDT	Tornado Warning	GRB	Marinette, Oconto	26 min
Jun 18, 4:45 PM CDT	Special Marine Warning	GRB		90 min
Jun 18, 4:51 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Winnebago	39 min
Jun 18, 5:12 PM CDT	Special Marine Warning	GRB		75 min
Jun 18, 5:30 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Calumet, Manitowoc, Outagamie, Winnebago	45 min
Jun 18, 5:31 PM CDT	Special Marine Warning	GRB		89 min
Jun 18, 6:08 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Manitowoc, Winnebago	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.