Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Green Bay, WI

May 11, 2011Oneida County, Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 11, 2011, 2:10 AM CDT for Oneida County, Vilas County, Wisconsin. It was in force for 50 min. 2 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 11, 2011, 2:10 AM CDT (07:10 UTC)
Expired: May 11, 2011, 3:00 AM CDT
In force: 50 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Oneida County, WI, Vilas County, WI

The radar

The Marquette radar (KMQT), 179 km from the middle of the area, began a volume at 07:13 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 11, 2:20 AM CDT	HAIL 0.5	Lac Du Flambeau, WI
May 11, 3:05 AM CDT	HAIL 0.5	St Germain, WI	MOD TO HEAVY RAIN, NO WIND

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, 7.2 hours before the alert went out and 208 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: 883 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.8

Open this sounding in Storm Lab

The text

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

103 
WUUS53 KGRB 110710
SVRGRB
WIC085-125-110800-
/O.NEW.KGRB.SV.W.0009.110511T0710Z-110511T0800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
210 AM CDT WED MAY 11 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ONEIDA COUNTY IN NORTH CENTRAL WISCONSIN...
  SOUTHERN VILAS COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 300 AM CDT

* AT 209 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 6 MILES SOUTH OF LAC DU FLAMBEAU...OR 28
  MILES EAST OF PARK FALLS...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EAGLE RIVER...PHELPS...HAZELHURST...MINOCQUA...WOODRUFF...ARBOR
  VITAE...LAKE TOMAHAWK AND SAYNER.

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 4592 9005 4598 9004 4599 9003 4599 8994
      4601 8993 4614 8906 4613 8905 4579 8906
      4567 9005
TIME...MOT...LOC 0710Z 268DEG 50KT 4588 8985
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG

3 follow-up statements

323 
WWUS53 KGRB 110732
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
232 AM CDT WED MAY 11 2011

WIC085-125-110800-
/O.CON.KGRB.SV.W.0009.000000T0000Z-110511T0800Z/
ONEIDA WI-VILAS WI-
232 AM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN VILAS
AND NORTHERN ONEIDA COUNTIES UNTIL 300 AM CDT...

AT 228 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED 5 MILES EAST OF LAC DU FLAMBEAU...OR 21 MILES
WEST OF EAGLE RIVER...MOVING NORTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAYNER AROUND 235 AM CDT.
  STAR LAKE AND ST. GERMAIN AROUND 245 AM CDT.
  CONOVER AROUND 250 AM CDT. 
  EAGLE RIVER AROUND 255 AM CDT.
  PHELPS AROUND 300 AM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE SAYNER...
ST GERMAIN...STAR LAKE AND CONOVER.

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 4573 8994 4594 8992 4599 8994 4601 8993
      4614 8906 4613 8905 4579 8906
TIME...MOT...LOC 0730Z 262DEG 40KT 4596 8964
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG

722 
WWUS53 KGRB 110748
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
248 AM CDT WED MAY 11 2011

WIC085-125-110800-
/O.CON.KGRB.SV.W.0009.000000T0000Z-110511T0800Z/
ONEIDA WI-VILAS WI-
248 AM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN VILAS
AND NORTHEASTERN ONEIDA COUNTIES UNTIL 300 AM CDT...

AT 243 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED 15 MILES WEST OF EAGLE RIVER...MOVING
NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CONOVER AROUND 250 AM CDT. 
  EAGLE RIVER AROUND 255 AM CDT.
  PHELPS AROUND 300 AM CDT.

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 4575 8970 4600 8975 4614 8906 4613 8905
      4579 8906
TIME...MOT...LOC 0744Z 262DEG 25KT 4593 8950
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG

198 
WWUS53 KGRB 110800
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
300 AM CDT WED MAY 11 2011

WIC085-125-110809-
/O.EXP.KGRB.SV.W.0009.000000T0000Z-110511T0800Z/
ONEIDA WI-VILAS WI-
300 AM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN VILAS AND
NORTHEASTERN ONEIDA COUNTIES WILL EXPIRE AT 300 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
ADDITIONAL THUNDERSTORMS COULD STILL PRODUCE LARGE HAIL ACROSS 
EASTERN VILAS AND ONEIDA COUNTIES THROUGH 4 AM CDT. 

LAT...LON 4575 8970 4600 8975 4614 8906 4613 8905
      4579 8906
TIME...MOT...LOC 0759Z 262DEG 25KT 4593 8935

$$

ECKBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 1:43 AM CDT	Severe Thunderstorm Warning	GRB	Vilas	47 min
May 11, 3:05 AM CDT	Severe Thunderstorm Warning	GRB	Oneida	40 min
May 11, 3:40 AM CDT	Severe Thunderstorm Warning	GRB	Forest	50 min
May 11, 4:47 AM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Oconto	43 min
May 11, 5:38 AM CDT	Severe Thunderstorm Warning	GRB	Marinette	37 min
May 11, 6:16 AM CDT	Severe Thunderstorm Warning	GRB	Marinette	44 min
May 11, 6:56 AM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	37 min
May 11, 7:26 AM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	49 min
May 11, 7:32 AM CDT	Special Marine Warning	GRB		88 min
May 11, 8:56 AM CDT	Special Marine Warning	GRB		94 min
May 11, 9:05 AM CDT	Severe Thunderstorm Warning	GRB	Door	43 min
May 11, 9:44 AM CDT	Areal Flood Advisory	GRB	Oconto	106 min
May 11, 10:27 AM CDT	Severe Thunderstorm Warning	GRB	Oconto	48 min
May 11, 10:31 AM CDT	Special Marine Warning	GRB		60 min
May 11, 11:28 AM CDT	Areal Flood Advisory	GRB	Oconto	2 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.