Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 14, NWS Milwaukee, WI

May 3, 2012Jefferson County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 3, 2012, 4:10 PM CDT for Jefferson County, Waukesha County, Wisconsin. It was in force for 35 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 3, 2012, 4:10 PM CDT (21:10 UTC)
Expired: May 3, 2012, 4:45 PM CDT
In force: 35 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Jefferson County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 15 km from the middle of the area, began a volume at 21:11 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 3, 4:27 PM CDT	HAIL 1.75	1 Ne Fort Atkinson, WI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 3, 1:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.2 hours before the alert went out and 178 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: 321 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

269 
WUUS53 KMKX 032110
SVRMKX
WIC055-133-032145-
/O.NEW.KMKX.SV.W.0014.120503T2110Z-120503T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
410 PM CDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN JEFFERSON COUNTY IN SOUTHEAST WISCONSIN...
  SOUTHWESTERN WAUKESHA COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 445 PM CDT

* AT 406 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR LAKE RIPLEY...OR 6 MILES SOUTH OF LAKE
  MILLS...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FORT ATKINSON...JEFFERSON...PALMYRA...DOUSMAN...HELENVILLE...
  HEBRON...ROME...SULLIVAN AND NWS SULLIVAN/MILWAUKEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 4294 8898 4309 8894 4304 8846 4284 8852
      4284 8854
TIME...MOT...LOC 2110Z 280DEG 29KT 4298 8888
WIND...HAIL <50MPH 1.50IN

$$

WIMBERLEY

3 follow-up statements

852 
WWUS53 KMKX 032120
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
420 PM CDT THU MAY 3 2012

WIC055-133-032145-
/O.CON.KMKX.SV.W.0014.000000T0000Z-120503T2145Z/
JEFFERSON WI-WAUKESHA WI-
420 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
WAUKESHA AND SOUTHERN JEFFERSON COUNTIES UNTIL 445 PM CDT...

AT 415 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED NEAR JEFFERSON...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  PALMYRA...DOUSMAN...HELENVILLE...HEBRON...ROME...SULLIVAN AND NWS
  SULLIVAN/MILWAUKEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 4293 8894 4308 8889 4304 8846 4284 8852
      4284 8855
TIME...MOT...LOC 2120Z 280DEG 29KT 4296 8877
WIND...HAIL <50MPH 1.50IN

$$

BROOKS

753 
WWUS53 KMKX 032128
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
428 PM CDT THU MAY 3 2012

WIC055-133-032145-
/O.CON.KMKX.SV.W.0014.000000T0000Z-120503T2145Z/
JEFFERSON WI-WAUKESHA WI-
428 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
WAUKESHA AND SOUTHEASTERN JEFFERSON COUNTIES UNTIL 445 PM CDT...

AT 422 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING
GOLF BALL SIZE HAIL.  THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF
JEFFERSON...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  PALMYRA...DOUSMAN...ROME...SULLIVAN AND NWS SULLIVAN/MILWAUKEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 4291 8885 4307 8881 4304 8846 4284 8852
      4284 8856
TIME...MOT...LOC 2128Z 280DEG 29KT 4295 8868
WIND...HAIL <50MPH 1.75IN

$$

BROOKS

508 
WWUS53 KMKX 032137
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
437 PM CDT THU MAY 3 2012

WIC055-133-032147-
/O.EXP.KMKX.SV.W.0014.000000T0000Z-120503T2145Z/
JEFFERSON WI-WAUKESHA WI-
437 PM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WAUKESHA AND
SOUTHEASTERN JEFFERSON COUNTIES WILL EXPIRE AT 445 PM CDT...

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

LAT...LON 4291 8885 4307 8881 4304 8846 4284 8852
      4284 8856
TIME...MOT...LOC 2137Z 280DEG 29KT 4294 8858

$$

BROOKS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 2:09 AM CDT	Areal Flood Advisory	MKX	Fond du Lac, Green Lake, Marquette	3 hr
May 3, 8:34 AM CDT	Areal Flood Advisory	MKX	Green Lake, Marquette	3 hr
May 3, 11:41 AM CDT	Small Craft Advisory	MKX		4 hr
May 3, 12:54 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	51 min
May 3, 1:05 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson	40 min
May 3, 1:29 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	46 min
May 3, 1:31 PM CDT	Special Marine Warning	MKX		29 min
May 3, 1:41 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Washington	49 min
May 3, 1:53 PM CDT	Special Marine Warning	MKX		37 min
May 3, 2:15 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	30 min
May 3, 2:23 PM CDT	Special Marine Warning	MKX		12 min
May 3, 2:29 PM CDT	Special Marine Warning	MKX		31 min
May 3, 2:54 PM CDT	Special Marine Warning	MKX		66 min
May 3, 2:59 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge	46 min
May 3, 3:21 PM CDT	Severe Thunderstorm Warning	MKX	Dane	39 min
May 3, 3:52 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	23 min
May 3, 3:52 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	23 min
May 3, 4:17 PM CDT	Special Marine Warning	MKX		43 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every severe thunderstorm warning in 2012

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.