Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 95, NWS Milwaukee, WI

June 21, 2011Dane County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jun 21, 2011, 7:20 PM CDT for Dane County, Wisconsin. It was in force for 16 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: Jun 21, 2011, 7:20 PM CDT (00:20 UTC)
Expired: Jun 21, 2011, 7:36 PM CDT
In force: 16 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Dane County, WI

The radar

The Milwaukee radar (KMKX), 60 km from the middle of the area, began a volume at 00:22 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
Jun 21, 2:11 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.3 hours before the alert went out and 175 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: 1109 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

636 
WUUS53 KMKX 220020
SVRMKX
WIC025-220100-
/O.NEW.KMKX.SV.W.0095.110622T0020Z-110622T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
720 PM CDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL DANE COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 800 PM CDT

* AT 718 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  COTTAGE GROVE...OR NEAR MONONA...AND MOVING NORTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MADISON TRUAX AIRPORT AROUND 725 PM CDT.
  SUN PRAIRIE AROUND 735 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE TOKEN
CREEK AND EAST BRISTOL.

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.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT TUESDAY EVENING
FOR SOUTHEASTERN WISCONSIN.

LAT...LON 4306 8933 4328 8934 4328 8908 4304 8917
TIME...MOT...LOC 0020Z 190DEG 27KT 4309 8924
WIND...HAIL 60MPH 1.00IN

$$

DAVIS

2 follow-up statements

346 
WWUS53 KMKX 220030
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
730 PM CDT TUE JUN 21 2011

WIC025-220100-
/O.CON.KMKX.SV.W.0095.000000T0000Z-110622T0100Z/
DANE WI-
730 PM CDT TUE JUN 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
DANE COUNTY UNTIL 800 PM CDT...

AT 727 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR I90/94 INTERCHANGE...OR NEAR SUN PRAIRIE...
MOVING NORTH AT 30 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH 
CENTRAL DANE COUNTY...INCLUDING THE FOLLOWING LOCATIONS TOKEN CREEK. 
HOWEVER...THIS STORM WAS SHOWING SIGNS OF WEAKENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. 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.

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 4305 8922 4306 8933 4319 8934 4328 8932
      4328 8908
TIME...MOT...LOC 0030Z 178DEG 26KT 4317 8926
WIND...HAIL <50MPH 1.00IN

$$

MRC

541 
WWUS53 KMKX 220036
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
736 PM CDT TUE JUN 21 2011

WIC025-220046-
/O.CAN.KMKX.SV.W.0095.000000T0000Z-110622T0100Z/
DANE WI-
736 PM CDT TUE JUN 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL DANE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 9 PM.

LAT...LON 4305 8922 4306 8933 4319 8934 4328 8932
      4328 8908
TIME...MOT...LOC 0036Z 178DEG 26KT 4321 8926

$$

MRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:22 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	38 min
Jun 21, 7:41 PM CDT	Areal Flood Advisory	MKX	Kenosha, Milwaukee, Ozaukee, Racine, Walworth, Washington and 1 more	3 hr
Jun 21, 7:53 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Racine, Waukesha	12 min
Jun 21, 7:55 PM CDT	Special Marine Warning	MKX		95 min
Jun 21, 7:57 PM CDT	Flash Flood Warning	MKX	Milwaukee, Waukesha	4 hr
Jun 21, 8:03 PM CDT	Areal Flood Advisory	MKX	Dane	2 hr
Jun 21, 8:24 PM CDT	Special Marine Warning	MKX		96 min
Jun 21, 8:27 PM CDT	Areal Flood Advisory	MKX	Columbia, Green Lake, Marquette, Sauk	4 hr
Jun 21, 8:51 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	24 min
Jun 21, 8:57 PM CDT	Special Marine Warning	MKX		75 min
Jun 22, 12:34 AM CDT	Areal Flood Advisory	MKX	Fond du Lac, Green Lake, Marquette	3 hr
Jun 22, 9:39 AM CDT	Small Craft Advisory	MKX		10 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.