Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Milwaukee, WI

May 11, 2011Green County, Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 11, 2011, 5:11 PM CDT for Green County, Rock County, Wisconsin. It was in force for 49 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 11, 2011, 5:11 PM CDT (22:11 UTC)
Expired: May 11, 2011, 6:00 PM CDT
In force: 49 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Green County, WI, Rock County, WI

The radar

The Milwaukee radar (KMKX), 72 km from the middle of the area, began a volume at 22:12 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 11, 1:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.2 hours before the alert went out and 148 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: 2842 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

832 
WUUS53 KMKX 112211
SVRMKX
WIC045-105-112300-
/O.NEW.KMKX.SV.W.0041.110511T2211Z-110511T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
511 PM CDT WED MAY 11 2011

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GREEN COUNTY IN SOUTH CENTRAL WISCONSIN...
  SOUTHERN ROCK COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 600 PM CDT

* AT 508 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR DURAND...OR 9 MILES SOUTH OF
  BRODHEAD...AND MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRODHEAD AROUND 520 PM CDT.
  ORFORDVILLE AROUND 535 PM CDT.
  FOOTVILLE AROUND 545 PM CDT.
  JANESVILLE AIRPORT AROUND 555 PM CDT.
  DOWNTOWN JANESVILLE AROUND 600 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
NEWARK...HANOVER AND AFTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4250 8949 4278 8931 4265 8886 4249 8916
TIME...MOT...LOC 2211Z 224DEG 20KT 4250 8933
WIND...HAIL <50MPH 1.25IN

$$

SEARS

3 follow-up statements

849 
WWUS53 KMKX 112228
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
528 PM CDT WED MAY 11 2011

WIC045-112237-
/O.CAN.KMKX.SV.W.0041.000000T0000Z-110511T2300Z/
GREEN WI-
528 PM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREEN COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4250 8936 4269 8937 4278 8931 4265 8886
      4249 8916
TIME...MOT...LOC 2227Z 236DEG 17KT 4258 8926

$$

WIC105-112300-
/O.CON.KMKX.SV.W.0041.000000T0000Z-110511T2300Z/
ROCK WI-
528 PM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ROCK
COUNTY UNTIL 600 PM CDT...

AT 521 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL.  THIS
STORM WAS LOCATED 5 MILES SOUTH OF ORFORDVILLE...OR 6 MILES SOUTHEAST
OF BRODHEAD...MOVING NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ORFORDVILLE AROUND 535 PM CDT.
  FOOTVILLE AROUND 545 PM CDT.
  JANESVILLE AIRPORT AND DOWNTOWN JANESVILLE AROUND 600 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE HANOVER
AND AFTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4250 8936 4269 8937 4278 8931 4265 8886
      4249 8916
TIME...MOT...LOC 2227Z 236DEG 17KT 4258 8926
WIND...HAIL <50MPH 1.25IN

$$

MRC

549 
WWUS53 KMKX 112240
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
540 PM CDT WED MAY 11 2011

WIC105-112300-
/O.CON.KMKX.SV.W.0041.000000T0000Z-110511T2300Z/
ROCK WI-
540 PM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL ROCK
COUNTY UNTIL 600 PM CDT...

AT 539 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR FOOTVILLE...OR 8 MILES WEST OF DOWNTOWN
JANESVILLE...MOVING NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  JANESVILLE AIRPORT AROUND 550 PM CDT.
  DOWNTOWN JANESVILLE AROUND 600 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE AFTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4256 8904 4258 8924 4263 8929 4271 8929
      4277 8926 4265 8886
TIME...MOT...LOC 2240Z 235DEG 21KT 4265 8917
WIND...HAIL <50MPH 1.00IN

$$

MRC

493 
WWUS53 KMKX 112252
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
552 PM CDT WED MAY 11 2011

WIC105-112302-
/O.EXP.KMKX.SV.W.0041.000000T0000Z-110511T2300Z/
ROCK WI-
552 PM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ROCK COUNTY WILL
EXPIRE AT 600 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4256 8904 4258 8924 4263 8929 4271 8929
      4277 8926 4265 8886
TIME...MOT...LOC 2252Z 235DEG 21KT 4269 8909

$$

MRC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 1:02 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	43 min
May 11, 1:04 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	41 min
May 11, 1:17 PM CDT	Severe Thunderstorm Warning	MKX	Dane	28 min
May 11, 1:39 PM CDT	Severe Thunderstorm Warning	MKX	Dane	36 min
May 11, 1:43 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	32 min
May 11, 2:03 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Dodge, Jefferson	42 min
May 11, 2:21 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge	24 min
May 11, 2:27 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Rock, Walworth	48 min
May 11, 2:54 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Racine, Walworth, Waukesha	36 min
May 11, 3:10 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	35 min
May 11, 3:22 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	38 min
May 11, 3:53 PM CDT	Severe Thunderstorm Warning	MKX	Dane	52 min
May 11, 3:58 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	32 min
May 11, 4:28 PM CDT	Severe Thunderstorm Warning	MKX	Waukesha	47 min
May 11, 4:36 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	39 min
May 11, 4:42 PM CDT	Severe Thunderstorm Warning	MKX	Dane	48 min
May 11, 5:13 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Rock	37 min
May 11, 5:27 PM CDT	Areal Flood Advisory	MKX	Kenosha	93 min
May 11, 5:55 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	29 min
May 11, 6:13 PM CDT	Severe Thunderstorm Warning	MKX	Racine	32 min

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.