Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Green Bay, WI

May 22, 2011Oconto County, Shawano County, Waupaca County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 22, 2011, 7:23 PM CDT for Oconto County, Shawano County, Waupaca County, Wisconsin. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 22, 2011, 7:23 PM CDT (00:23 UTC)
Expired: May 22, 2011, 8:15 PM CDT
In force: 52 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Oconto County, WI, Shawano County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 48 km from the middle of the area, began a volume at 00:26 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.

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 22, 2:04 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 49 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: 753 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 942 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 325 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

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

308 
WUUS53 KGRB 230023
SVRGRB
WIC083-115-135-230115-
/O.NEW.KGRB.SV.W.0039.110523T0023Z-110523T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
723 PM CDT SUN MAY 22 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OCONTO COUNTY IN NORTHEAST WISCONSIN...
  SHAWANO COUNTY IN NORTHEAST WISCONSIN...
  NORTHEASTERN WAUPACA COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 815 PM CDT

* AT 722 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 8 MILES WEST OF SHAWANO TO CLINTONVILLE...AND MOVING NORTHEAST
  AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHAWANO...CLINTONVILLE...GILLETT...THORNTON...EMBARRASS...ADAMS
  BEACH...BELLE PLAINE AND SHAWANO LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE FOR WINDS OF 60 MPH OR
STRONGER. IF INDOORS...STAY AWAY FROM WINDOWS. IF OUTSIDE...QUICKLY
MOVE TO A STURDY SHELTER.

&&

LAT...LON 4474 8885 4486 8857 4485 8849 4489 8849
      4498 8826 4471 8826 4459 8866 4459 8873
      4456 8874 4452 8889
TIME...MOT...LOC 0023Z 242DEG 42KT 4480 8874 4459 8881
WIND...HAIL 60MPH <.75IN

$$

MPC

2 follow-up statements

514 
WWUS53 KGRB 230052
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
752 PM CDT SUN MAY 22 2011

WIC135-230101-
/O.CAN.KGRB.SV.W.0039.000000T0000Z-110523T0115Z/
WAUPACA WI-
752 PM CDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WAUPACA COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.  A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.

LAT...LON 4468 8860 4476 8862 4480 8862 4486 8857
      4485 8849 4489 8849 4498 8826 4471 8826
      4461 8857 4461 8861
TIME...MOT...LOC 0051Z 242DEG 38KT 4486 8845 4465 8852

$$

WIC083-115-230115-
/O.CON.KGRB.SV.W.0039.000000T0000Z-110523T0115Z/
SHAWANO WI-OCONTO WI-
752 PM CDT SUN MAY 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OCONTO AND
SHAWANO COUNTIES UNTIL 815 PM CDT...

AT 749 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 7 MILES NORTHEAST OF SHAWANO TO 10 MILES EAST OF CLINTONVILLE...
MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  GILLETT...CECIL...BONDUEL...UNDERHILL...PULCIFER...ADVANCE AND
  ZACHOW.

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 4468 8860 4476 8862 4480 8862 4486 8857
      4485 8849 4489 8849 4498 8826 4471 8826
      4461 8857 4461 8861
TIME...MOT...LOC 0051Z 242DEG 38KT 4486 8845 4465 8852
WIND...HAIL 60MPH <.75IN

$$

TDH

939 
WWUS53 KGRB 230110
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
810 PM CDT SUN MAY 22 2011

WIC083-115-230119-
/O.EXP.KGRB.SV.W.0039.000000T0000Z-110523T0115Z/
SHAWANO WI-OCONTO WI-
810 PM CDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR OCONTO AND SHAWANO COUNTIES
WILL EXPIRE AT 815 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.

LAT...LON 4468 8860 4476 8862 4480 8862 4486 8857
      4485 8849 4489 8849 4498 8826 4471 8826
      4461 8857 4461 8861
TIME...MOT...LOC 0109Z 242DEG 38KT 4495 8821 4474 8828

$$

TDH

The office that day

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

Issued	Product	Office	Lasted
May 22, 8:25 PM CDT	Special Marine Warning	GRB	95 min
May 22, 8:48 PM CDT	Special Marine Warning	GRB	117 min
May 22, 9:18 PM CDT	Special Marine Warning	GRB	42 min
May 23, 4:25 AM CDT	Small Craft Advisory	GRB	23 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.