Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 25, NWS Milwaukee, WI

May 15, 2012Milwaukee County, Racine County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 15, 2012, 6:10 PM CDT for Milwaukee County, Racine County, Waukesha County, Wisconsin. It was in force for 35 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 15, 2012, 6:10 PM CDT (23:10 UTC)
Expired: May 15, 2012, 6:45 PM CDT
In force: 35 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Milwaukee County, WI, Racine County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 44 km from the middle of the area, began a volume at 23:10 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.2 hours before the alert went out and 183 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: 2744 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 167 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.

824 
WUUS53 KMKX 152310
SVRMKX
WIC079-101-133-152345-
/O.NEW.KMKX.SV.W.0025.120515T2310Z-120515T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
610 PM CDT TUE MAY 15 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MILWAUKEE COUNTY IN SOUTHEAST WISCONSIN...
  NORTHERN RACINE COUNTY IN SOUTHEAST WISCONSIN...
  FAR SOUTHEASTERN WAUKESHA COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 645 PM CDT

* AT 605 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
  WATERFORD NORTH...OR NEAR WIND LAKE...AND MOVING EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MUSKEGO AROUND 615 PM CDT.
  FRANKLIN AND HALES CORNERS AROUND 620 PM CDT.
  GREENDALE AND GREENFIELD AROUND 625 PM CDT.
  SOUTH MILWAUKEE...OAK CREEK...CUDAHY AND MILWAUKEE INTERNATIONAL
  AIRPORT AROUND 630 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE NORTH
CAPE...FRANKLIN...CALEDONIA...MILWAUKEE SOUTH SHORE PARK AND SAINT
FRANCIS.

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 4270 8819 4270 8831 4290 8831 4301 8789
      4296 8784 4287 8783 4282 8779
TIME...MOT...LOC 2309Z 252DEG 42KT 4284 8819
WIND...HAIL 60MPH 1.00IN

$$

WOOD

3 follow-up statements

613 
WWUS53 KMKX 152321
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
621 PM CDT TUE MAY 15 2012

WIC079-101-133-152345-
/O.CON.KMKX.SV.W.0025.000000T0000Z-120515T2345Z/
MILWAUKEE WI-RACINE WI-WAUKESHA WI-
621 PM CDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
WAUKESHA...NORTHERN RACINE AND SOUTHERN MILWAUKEE COUNTIES UNTIL 645
PM CDT...

AT 614 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THIS STORM WAS LOCATED NEAR MUSKEGO...MOVING EAST AT 50
MPH.

THE TERMINAL DOPPLER RADAR INDICATED 76 MPH WEST WINDS 1 MILE EAST 
OF WIND LAKE IN RACINE COUNTY AT JUST 200-300 FEET ABOVE THE 
GROUND.  

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREENDALE AND GREENFIELD AROUND 625 PM CDT.
  OAK CREEK...CUDAHY...MILWAUKEE INTERNATIONAL AIRPORT AND ST.
  FRANCIS AROUND 630 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE
CALEDONIA...MILWAUKEE SOUTH SHORE PARK AND SAINT FRANCIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SULLIVAN.

&&

LAT...LON 4270 8819 4284 8819 4293 8818 4301 8789
      4296 8784 4287 8783 4282 8779
TIME...MOT...LOC 2319Z 252DEG 42KT 4287 8804
WIND...HAIL 70MPH <.75IN

$$

CRAVEN

760 
WWUS53 KMKX 152328
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
628 PM CDT TUE MAY 15 2012

WIC133-152337-
/O.CAN.KMKX.SV.W.0025.000000T0000Z-120515T2345Z/
WAUKESHA WI-
628 PM CDT TUE MAY 15 2012

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

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

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SULLIVAN.

LAT...LON 4275 8803 4286 8804 4296 8806 4301 8789
      4296 8784 4287 8783 4282 8779
TIME...MOT...LOC 2327Z 252DEG 42KT 4289 8792

$$

WIC079-101-152345-
/O.CON.KMKX.SV.W.0025.000000T0000Z-120515T2345Z/
MILWAUKEE WI-RACINE WI-
628 PM CDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
RACINE AND SOUTHERN MILWAUKEE COUNTIES UNTIL 645 PM CDT...

AT 624 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED NEAR FRANKLIN...MOVING EAST AT 50
MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN RACINE AND SOUTHERN MILWAUKEE COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SULLIVAN.

&&

LAT...LON 4275 8803 4286 8804 4296 8806 4301 8789
      4296 8784 4287 8783 4282 8779
TIME...MOT...LOC 2327Z 252DEG 42KT 4289 8792
WIND...HAIL 60MPH <.75IN

$$

CRAVEN

504 
WWUS53 KMKX 152340
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
640 PM CDT TUE MAY 15 2012

WIC101-152349-
/O.CAN.KMKX.SV.W.0025.000000T0000Z-120515T2345Z/
RACINE WI-
640 PM CDT TUE MAY 15 2012

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

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

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SULLIVAN.

LAT...LON 4284 8783 4284 8790 4289 8793 4299 8795
      4301 8789 4296 8784 4291 8783 4288 8784
      4288 8783 4287 8783
TIME...MOT...LOC 2339Z 252DEG 42KT 4293 8774

$$

WIC079-152345-
/O.CON.KMKX.SV.W.0025.000000T0000Z-120515T2345Z/
MILWAUKEE WI-
640 PM CDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MILWAUKEE COUNTY UNTIL 645 PM CDT...

AT 638 PM CDT...THIS STORM CAPABLE OF PRODUCING 60 MPH WIND GUSTS 
WAS LOCATED 6 MILES EAST OF SOUTH MILWAUKEE...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...

THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MILWAUKEE COUNTY 
WILL EXPIRE AT 645 PM CDT...

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

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SULLIVAN.

LAT...LON 4284 8783 4284 8790 4289 8793 4299 8795
      4301 8789 4296 8784 4291 8783 4288 8784
      4288 8783 4287 8783
TIME...MOT...LOC 2339Z 252DEG 42KT 4293 8774
WIND...HAIL <50MPH <.75IN

$$

CRAVEN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 4:00 AM CDT	Small Craft Advisory	MKX		20 hr
May 15, 6:00 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Waukesha	45 min
May 15, 6:17 PM CDT	Special Marine Warning	MKX		58 min
May 15, 6:51 PM CDT	Special Marine Warning	MKX		34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.