Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 77, NWS Milwaukee, WI

July 31, 2012Kenosha County, Racine County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 31, 2012, 1:11 AM CDT for Kenosha County, Racine County, Wisconsin. It was in force for 34 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: Jul 31, 2012, 1:11 AM CDT (06:11 UTC)
Expired: Jul 31, 2012, 1:45 AM CDT
In force: 34 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kenosha County, WI, Racine County, WI

The radar

The Milwaukee radar (KMKX), 64 km from the middle of the area, began a volume at 06:15 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

Davenport, (KDVN), launched 00:00Z, 6.2 hours before the alert went out and 241 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: 693 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

122 
WUUS53 KMKX 310611
SVRMKX
WIC059-101-310645-
/O.NEW.KMKX.SV.W.0077.120731T0611Z-120731T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
111 AM CDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KENOSHA COUNTY IN SOUTHEAST WISCONSIN...
  EAST CENTRAL RACINE COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 145 AM CDT

* AT 105 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF FRANKLIN TO
  EAGLE LAKE TO BOHNERS LAKE...AND MOVING SOUTHEAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  DOWNTOWN RACINE...RACINE BATTEN AIRPORT...WIND POINT AND KENOSHA
  AIRPORT AROUND 120 AM CDT.
  PLEASANT PRAIRIE AND DOWNTOWN KENOSHA AROUND 125 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
SALEM...BRISTOL...ELMWOOD PARK AND NORTH BAY.

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 4276 8776 4271 8776 4265 8781 4261 8781
      4250 8780 4249 8781 4249 8823 4253 8831
      4256 8830 4262 8798 4283 8780 4278 8774
TIME...MOT...LOC 0611Z 301DEG 42KT 4277 8794 4264 8806
          4260 8825
WIND...HAIL 60MPH 1.00IN

$$
DDV

2 follow-up statements

307 
WWUS53 KMKX 310622
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
122 AM CDT TUE JUL 31 2012

WIC059-101-310645-
/O.CON.KMKX.SV.W.0077.000000T0000Z-120731T0645Z/
RACINE WI-KENOSHA WI-
122 AM CDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR KENOSHA AND
EAST CENTRAL RACINE COUNTIES UNTIL 145 AM CDT...

AT 119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM DOWNTOWN RACINE TO KENOSHA
AIRPORT TO SILVER LAKE...MOVING SOUTHEAST AT 50 MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
RACINE AND KENOSHA COUNTIES.

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 4276 8776 4271 8776 4265 8781 4261 8781
      4250 8780 4249 8781 4249 8823 4253 8831
      4256 8830 4262 8798 4283 8780 4278 8774
TIME...MOT...LOC 0621Z 301DEG 42KT 4271 8781 4258 8793
          4254 8812
WIND...HAIL 60MPH 1.00IN

$$

BROOKS

406 
WWUS53 KMKX 310640
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
140 AM CDT TUE JUL 31 2012

WIC059-101-310650-
/O.EXP.KMKX.SV.W.0077.000000T0000Z-120731T0645Z/
RACINE WI-KENOSHA WI-
140 AM CDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR KENOSHA AND EAST CENTRAL
RACINE COUNTIES WILL EXPIRE AT 145 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA.

LAT...LON 4276 8776 4271 8776 4265 8781 4261 8781
      4250 8780 4249 8781 4249 8823 4253 8831
      4256 8830 4262 8798 4283 8780 4278 8774
TIME...MOT...LOC 0640Z 301DEG 42KT 4259 8755 4246 8767
          4242 8786

$$

BROOKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:16 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac	29 min
Jul 30, 11:05 PM CDT	Special Marine Warning	MKX		55 min
Jul 30, 11:53 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	37 min
Jul 31, 12:05 AM CDT	Special Marine Warning	MKX		55 min
Jul 31, 12:23 AM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	37 min
Jul 31, 12:40 AM CDT	Special Marine Warning	MKX		110 min
Jul 31, 12:50 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Walworth, Waukesha	40 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.