Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 20, NWS Green Bay, WI

May 24, 20125 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 24, 2012, 8:29 PM CDT for 5 counties in Wisconsin. It was in force for 35 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: May 24, 2012, 8:29 PM CDT (01:29 UTC)
Expired: May 24, 2012, 9:04 PM CDT
In force: 35 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Langlade County, WI, Menominee County, WI, Oconto County, WI, Shawano County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 72 km from the middle of the area, began a volume at 01:32 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
May 24, 8:35 PM CDT	TSTM WND GST 60	3 W Marion, 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
May 24, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	2 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 74 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: 2474 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 313 m²/s²
0-3 km storm-relative helicity: 468 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.

690 
WUUS53 KGRB 250129
SVRGRB
WIC067-078-083-115-135-250215-
/O.NEW.KGRB.SV.W.0020.120525T0129Z-120525T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
829 PM CDT THU MAY 24 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LANGLADE COUNTY IN NORTH CENTRAL WISCONSIN...
  MENOMINEE COUNTY IN NORTHEAST WISCONSIN...
  OCONTO COUNTY IN NORTHEAST WISCONSIN...
  SHAWANO COUNTY IN NORTHEAST WISCONSIN...
  NORTH CENTRAL WAUPACA COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 915 PM CDT

* AT 827 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 5 MILES SOUTHWEST OF WITTENBERG TO 8 MILES SOUTHEAST OF
  WITTENBERG TO 11 MILES NORTH OF WAUPACA...AND MOVING NORTHEAST AT
  65 MPH.

  AT 804 PM, TREES DOWN WAS REPORTED IN PORTAGE WITH THESE STORMS.

* LOCATIONS IMPACTED INCLUDE...
  WITTENBERG...NEOPIT...KESHENA...MOUNTAIN...SPLIT ROCK...WHITCOMB...
  BIG FALLS AND SHEPLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 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 4447 8911 4467 8912 4471 8923 4480 8922
      4524 8864 4519 8841 4498 8841
TIME...MOT...LOC 0129Z 223DEG 58KT 4478 8919 4473 8904
          4453 8903
WIND...HAIL 60MPH <.75IN

$$

MPC

3 follow-up statements

624 
WWUS53 KGRB 250142
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
842 PM CDT THU MAY 24 2012

WIC135-250152-
/O.CAN.KGRB.SV.W.0020.000000T0000Z-120525T0215Z/
WAUPACA WI-
842 PM CDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WAUPACA COUNTY
IS CANCELLED...

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

LAT...LON 4470 8889 4481 8894 4491 8905 4524 8864
      4519 8841 4498 8841
TIME...MOT...LOC 0142Z 223DEG 58KT 4493 8899 4488 8884
          4468 8883

$$

WIC067-078-083-115-250215-
/O.CON.KGRB.SV.W.0020.000000T0000Z-120525T0215Z/
LANGLADE WI-MENOMINEE WI-SHAWANO WI-OCONTO WI-
842 PM CDT THU MAY 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OCONTO...
SHAWANO...MENOMINEE AND SOUTHEASTERN LANGLADE COUNTIES UNTIL 915 PM
CDT...

AT 840 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 9 MILES NORTHEAST OF WITTENBERG TO 9 MILES SOUTH OF NEOPIT TO 6
MILES NORTHWEST OF CLINTONVILLE...MOVING NORTHEAST AT 65 MPH.

LOCATIONS IMPACTED INCLUDE...
  NEOPIT...KESHENA...MOUNTAIN...MORGAN...LYNDHURST...GRESHAM...HAYES
  AND BREED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 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 4470 8889 4481 8894 4491 8905 4524 8864
      4519 8841 4498 8841
TIME...MOT...LOC 0142Z 223DEG 58KT 4493 8899 4488 8884
          4468 8883
WIND...HAIL 60MPH <.75IN

$$

MPC

001 
WWUS53 KGRB 250156
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
856 PM CDT THU MAY 24 2012

WIC067-115-250206-
/O.CAN.KGRB.SV.W.0020.000000T0000Z-120525T0215Z/
LANGLADE WI-SHAWANO WI-
856 PM CDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SHAWANO AND SOUTHEASTERN
LANGLADE COUNTIES IS CANCELLED...

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

LAT...LON 4493 8874 4494 8873 4494 8875 4505 8881
      4512 8871 4512 8865 4516 8864 4522 8856
      4519 8841 4498 8841 4487 8870
TIME...MOT...LOC 0156Z 223DEG 58KT 4509 8877 4504 8862
          4484 8861

$$

WIC078-083-250215-
/O.CON.KGRB.SV.W.0020.000000T0000Z-120525T0215Z/
MENOMINEE WI-OCONTO WI-
856 PM CDT THU MAY 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OCONTO AND
EASTERN MENOMINEE COUNTIES UNTIL 915 PM CDT...

AT 853 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 5 MILES NORTH OF NEOPIT TO 7 MILES EAST OF NEOPIT TO SHAWANO...
MOVING NORTHEAST AT 65 MPH.

LOCATIONS IMPACTED INCLUDE...
  MOUNTAIN...HAYES AND BREED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 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 4493 8874 4494 8873 4494 8875 4505 8881
      4512 8871 4512 8865 4516 8864 4522 8856
      4519 8841 4498 8841 4487 8870
TIME...MOT...LOC 0156Z 223DEG 58KT 4509 8877 4504 8862
          4484 8861
WIND...HAIL 60MPH <.75IN

$$

MPC

329 
WWUS53 KGRB 250204
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
904 PM CDT THU MAY 24 2012

WIC078-083-250214-
/O.CAN.KGRB.SV.W.0020.000000T0000Z-120525T0215Z/
MENOMINEE WI-OCONTO WI-
904 PM CDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR OCONTO AND EASTERN MENOMINEE
COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED ACROSS 
THE WARNED AREA.

LAT...LON 4493 8874 4494 8873 4494 8875 4505 8881
      4512 8871 4512 8865 4516 8864 4522 8856
      4519 8841 4498 8841 4487 8870
TIME...MOT...LOC 0204Z 223DEG 58KT 4519 8865 4514 8850
          4494 8849

$$

MPC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:03 PM CDT	Tornado Warning	GRB	Marathon	27 min
May 24, 7:20 PM CDT	Tornado Warning	GRB	Langlade, Lincoln	25 min
May 24, 7:32 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Oneida	29 min
May 24, 7:49 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Shawano, Waupaca, Waushara, Wood	41 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.