Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Milwaukee, WI

May 11, 2011Green County, Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 11, 2011, 4:36 PM CDT for Green County, Rock County, Wisconsin. It was in force for 39 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, 4:36 PM CDT (21:36 UTC)
Expired: May 11, 2011, 5:15 PM CDT
In force: 39 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Green County, WI, Rock County, WI

The radar

The Milwaukee radar (KMKX), 86 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 139 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.

422 
WUUS53 KMKX 112136
SVRMKX
WIC045-105-112215-
/O.NEW.KMKX.SV.W.0039.110511T2136Z-110511T2215Z/

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

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

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

* UNTIL 515 PM CDT

* AT 434 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR MONROE AIRPORT...OR NEAR MONROE...AND MOVING
  NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MONTICELLO AROUND 445 PM CDT.
  BRODHEAD AND ALBANY AROUND 505 PM CDT.
  ORFORDVILLE AROUND 515 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE JUDA.

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 8964 4284 8978 4285 8940 4250 8916
      4249 8927
TIME...MOT...LOC 2136Z 243DEG 17KT 4258 8956
WIND...HAIL <50MPH 1.00IN

$$

SEARS

2 follow-up statements

080 
WWUS53 KMKX 112148
SVSMKX

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

WIC045-105-112215-
/O.CON.KMKX.SV.W.0039.000000T0000Z-110511T2215Z/
GREEN WI-ROCK WI-
448 PM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
ROCK AND EASTERN GREEN COUNTIES UNTIL 515 PM CDT...

AT 443 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. 
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MONTICELLO TO
MONROE AIRPORT...MOVING NORTHEAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BRODHEAD AND ALBANY AROUND 505 PM CDT.
  ORFORDVILLE AROUND 515 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE DAYTON.

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 8953 4284 8967 4285 8940 4250 8916
      4249 8927
TIME...MOT...LOC 2148Z 243DEG 17KT 4277 8957 4259 8948
WIND...HAIL <50MPH 1.00IN

$$

MRC

953 
WWUS53 KMKX 112204
SVSMKX

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

WIC045-105-112215-
/O.CON.KMKX.SV.W.0039.000000T0000Z-110511T2215Z/
GREEN WI-ROCK WI-
504 PM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
ROCK AND EASTERN GREEN COUNTIES UNTIL 515 PM CDT...

AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR ALBANY...OR 7 MILES NORTHWEST OF BRODHEAD...
MOVING NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ORFORDVILLE AROUND 515 PM CDT.

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 4261 8950 4284 8956 4285 8940
      4250 8916 4249 8927
TIME...MOT...LOC 2205Z 240DEG 19KT 4272 8941
WIND...HAIL <50MPH 1.00IN

$$

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, 4:42 PM CDT	Severe Thunderstorm Warning	MKX	Dane	48 min
May 11, 5:11 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	49 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.