Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS Green Bay, WI

May 11, 2011Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 11, 2011, 1:43 AM CDT for Vilas 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: May 11, 2011, 1:43 AM CDT (06:43 UTC)
Expired: May 11, 2011, 2:30 AM CDT
In force: 47 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

County Vilas County, WI

The radar

The Marquette radar (KMQT), 159 km from the middle of the area, began a volume at 06:45 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, 2:00 AM CDT	HAIL 0.5	Presque Isle, 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, 6.7 hours before the alert went out and 222 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.

362 
WUUS53 KGRB 110643
SVRGRB
WIC125-110730-
/O.NEW.KGRB.SV.W.0008.110511T0643Z-110511T0730Z/

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

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 230 AM CDT

* AT 133 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR MERCER...OR 23 MILES SOUTH OF
  IRONWOOD...AND MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BOULDER JUNCTION AROUND 155 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE LAND O
LAKES.

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 4623 8952 4615 8910 4613 8906 4601 8993
      4628 8993 4630 8988
TIME...MOT...LOC 0643Z 264DEG 38KT 4615 8984
WIND...HAIL <50MPH 1.50IN

$$
ECKBERG

1 follow-up statement

592 
WWUS53 KGRB 110658
SVSGRB

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

WIC125-110730-
/O.CON.KGRB.SV.W.0008.000000T0000Z-110511T0730Z/
VILAS WI-
158 AM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN VILAS
COUNTY UNTIL 230 AM CDT...

AT 155 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 8 MILES EAST OF WINCHESTER...OR 26 MILES SOUTHEAST
OF IRONWOOD...MOVING NORTHEAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT PRESQUE ISLE BY BY 205 AM CDT...
AND RURAL AREAS OF NORTHERN VILAS COUNTY THROUGH 230 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 4623 8952 4615 8910 4613 8906 4601 8993
      4628 8993 4630 8988
TIME...MOT...LOC 0656Z 252DEG 37KT 4621 8973
WIND...HAIL <50MPH 1.00IN

$$

ECKBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 2:10 AM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	50 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.