Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Milwaukee, WI

March 12, 2012Milwaukee County, Racine County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Mar 12, 2012, 11:39 AM CDT for Milwaukee County, Racine County, Wisconsin. It was in force for 36 min. 2 reports 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: Mar 12, 2012, 11:39 AM CDT (16:39 UTC)
Expired: Mar 12, 2012, 12:15 PM CDT
In force: 36 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Milwaukee County, WI, Racine County, WI

The radar

The Milwaukee radar (KMKX), 54 km from the middle of the area, began a volume at 16:40 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
Mar 12, 12:00 PM CDT	HAIL 1	N Union Grove, WI
Mar 12, 12:01 PM CDT	HAIL 1.75	Caledonia, WI

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 4.7 hours before the alert went out and 184 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: 461 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 112 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.

038 
WUUS53 KMKX 121639
SVRMKX
WIC079-101-121715-
/O.NEW.KMKX.SV.W.0001.120312T1639Z-120312T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1139 AM CDT MON MAR 12 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MILWAUKEE COUNTY IN SOUTHEAST WISCONSIN...
  RACINE COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 1215 PM CDT

* AT 1135 AM CDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE   
THUNDERSTORM PRODUCING QUARTER SIZE HAIL IN KANSASVILLE.  THIS STORM 
WAS LOCATED NEAR EAGLE LAKE...OR NEAR UNION GROVE...AND MOVING 
NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OAK CREEK AROUND 1155 AM CDT.
  SOUTH MILWAUKEE...CUDAHY...MILWAUKEE INTERNATIONAL AIRPORT AND ST.
  FRANCIS AROUND NOON CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
FRANKSVILLE...CALEDONIA 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 4267 8799 4267 8806 4271 8819 4299 8787
      4299 8786 4296 8784 4291 8783 4289 8784
      4286 8783 4280 8778
TIME...MOT...LOC 1639Z 227DEG 42KT 4274 8808
WIND...HAIL <50MPH 1.00IN

$$

MRC

3 follow-up statements

588 
WWUS53 KMKX 121648
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1148 AM CDT MON MAR 12 2012

WIC079-101-121715-
/O.CON.KMKX.SV.W.0001.000000T0000Z-120312T1715Z/
MILWAUKEE WI-RACINE WI-
1148 AM CDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RACINE AND
SOUTHEASTERN MILWAUKEE COUNTIES UNTIL 1215 PM CDT...

AT 1145 AM CDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM
PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 7 MILES SOUTH OF
FRANKLIN...MOVING NORTHEAST AT 50 MPH.

IN ADDITION...AT 1145 PM PEA SIZE HAIL WAS REPORTED 2 MILES WEST OF 
MITCHELL AIRPORT WITH THIS STORM. THIS STORM WILL BE NEAR SAINT 
FRANCIS AND SOUTH MILWAUKEE BY 1150 PM.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  OAK CREEK AROUND 1155 AM CDT.
  SOUTH MILWAUKEE...CUDAHY...MILWAUKEE INTERNATIONAL AIRPORT AND ST.
  FRANCIS AROUND NOON CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE 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 4267 8799 4267 8806 4271 8819 4299 8787
      4299 8786 4296 8784 4291 8783 4289 8784
      4286 8783 4280 8778
TIME...MOT...LOC 1647Z 227DEG 42KT 4280 8798
WIND...HAIL <50MPH 1.00IN

$$

MRC

294 
WWUS53 KMKX 121659
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1159 AM CDT MON MAR 12 2012

WIC079-101-121715-
/O.CON.KMKX.SV.W.0001.000000T0000Z-120312T1715Z/
MILWAUKEE WI-RACINE WI-
1159 AM CDT MON MAR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
RACINE AND SOUTHEASTERN MILWAUKEE COUNTIES UNTIL 1215 PM CDT...

AT 1154 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING QUARTER SIZE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR OAK 
CREEK...MOVING NORTHEAST AT 50 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT AREAS OF NORTHEASTERN RACINE AND 
SOUTHEASTERN MILWAUKEE COUNTIES NEAR OAK CREEK AND THE LAKESHORE.

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 4274 8787 4284 8795 4292 8795 4299 8787
      4299 8786 4296 8784 4291 8783 4289 8784
      4286 8783 4280 8778
TIME...MOT...LOC 1658Z 233DEG 44KT 4288 8783
WIND...HAIL 60MPH 1.00IN

$$

MRC

049 
WWUS53 KMKX 121706
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1206 PM CDT MON MAR 12 2012

WIC079-101-121716-
/O.EXP.KMKX.SV.W.0001.000000T0000Z-120312T1715Z/
MILWAUKEE WI-RACINE WI-
1206 PM CDT MON MAR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RACINE AND
SOUTHEASTERN MILWAUKEE COUNTIES WILL EXPIRE AT 1215 PM CDT...

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

LAT...LON 4274 8787 4284 8795 4292 8795 4299 8787
      4299 8786 4296 8784 4291 8783 4289 8784
      4286 8783 4280 8778
TIME...MOT...LOC 1706Z 233DEG 44KT 4294 8772

$$

MRC

The office that day

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

Issued	Product	Office	Lasted
Mar 12, 3:55 AM CDT	Small Craft Advisory	MKX	15 hr
Mar 12, 9:29 AM CDT	Marine Dense Fog Advisory	MKX	6 hr
Mar 12, 11:51 AM CDT	Special Marine Warning	MKX	54 min
Mar 12, 12:41 PM CDT	Special Marine Warning	MKX	49 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.