Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Milwaukee, WI

August 20, 2012Kenosha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 20, 2012, 1:54 PM CDT for Kenosha County, Wisconsin. It was in force for 53 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: Aug 20, 2012, 1:54 PM CDT (18:54 UTC)
Expired: Aug 20, 2012, 2:47 PM CDT
In force: 53 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Kenosha County, WI

The radar

The Milwaukee radar (KMKX), 72 km from the middle of the area, began a volume at 18:57 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
Aug 20, 2:35 PM CDT	HAIL 1	Pleasant Prairie, WI	INTERSECTION OF INTERSTATE 94 AND HIGHWAY 165.

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, 6.9 hours before the alert went out and 216 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: 16 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 53 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.

164 
WUUS53 KMKX 201854
SVRMKX
WIC059-202000-
/O.NEW.KMKX.SV.W.0083.120820T1854Z-120820T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
154 PM CDT MON AUG 20 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN KENOSHA COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 300 PM CDT

* AT 152 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
  UNION GROVE...AND MOVING SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KENOSHA AIRPORT AROUND 220 PM CDT.
  PLEASANT PRAIRIE AROUND 235 PM CDT.
  DOWNTOWN KENOSHA AROUND 250 PM CDT.

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 4249 8781 4249 8793 4249 8795 4264 8804
      4267 8801 4259 8780 4252 8781 4250 8780
TIME...MOT...LOC 1854Z 313DEG 8KT 4263 8800
WIND...HAIL 60MPH 1.00IN

$$

WOOD

4 follow-up statements

606 
WWUS53 KMKX 201912
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
212 PM CDT MON AUG 20 2012

WIC059-202000-
/O.CON.KMKX.SV.W.0083.000000T0000Z-120820T2000Z/
KENOSHA WI-
212 PM CDT MON AUG 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
KENOSHA COUNTY UNTIL 300 PM CDT...

AT 206 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
KENOSHA AIRPORT...OR NEAR PLEASANT PRAIRIE...MOVING SOUTHEAST AT 10
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PLEASANT PRAIRIE AROUND 225 PM CDT.
  DOWNTOWN KENOSHA AROUND 240 PM CDT.

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 4249 8781 4249 8795 4261 8802 4265 8796
      4259 8780 4252 8781 4250 8780
TIME...MOT...LOC 1912Z 315DEG 9KT 4259 8794
WIND...HAIL 60MPH 1.00IN

$$

TOWNSEND

307 
WWUS53 KMKX 201924
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
224 PM CDT MON AUG 20 2012

WIC059-202000-
/O.CON.KMKX.SV.W.0083.000000T0000Z-120820T2000Z/
KENOSHA WI-
224 PM CDT MON AUG 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
KENOSHA COUNTY UNTIL 300 PM CDT...

AT 216 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
KENOSHA AIRPORT...OR NEAR PLEASANT PRAIRIE...MOVING SOUTHEAST AT 10
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PLEASANT PRAIRIE AROUND 230 PM CDT.
  DOWNTOWN KENOSHA AROUND 245 PM CDT.

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 4249 8781 4249 8795 4259 8801 4264 8795
      4259 8780 4252 8781 4250 8780
TIME...MOT...LOC 1924Z 318DEG 7KT 4257 8793
WIND...HAIL 60MPH 1.00IN

$$

TOWNSEND

652 
WWUS53 KMKX 201936
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
236 PM CDT MON AUG 20 2012

WIC059-202000-
/O.CON.KMKX.SV.W.0083.000000T0000Z-120820T2000Z/
KENOSHA WI-
236 PM CDT MON AUG 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
KENOSHA COUNTY UNTIL 300 PM CDT...

AT 226 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
PLEASANT PRAIRIE...MOVING SOUTHEAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
SOUTHEASTERN KENOSHA COUNTY.

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 4249 8781 4249 8795 4257 8800 4262 8789
      4260 8785 4255 8780 4252 8781 4250 8780
TIME...MOT...LOC 1936Z 330DEG 12KT 4250 8792
WIND...HAIL 60MPH 1.00IN

$$

TOWNSEND

933 
WWUS53 KMKX 201947
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
247 PM CDT MON AUG 20 2012

WIC059-201958-
/O.CAN.KMKX.SV.W.0083.000000T0000Z-120820T2000Z/
KENOSHA WI-
247 PM CDT MON AUG 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KENOSHA 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.

LAT...LON 4249 8781 4249 8795 4257 8800 4262 8789
      4260 8785 4255 8780 4252 8781 4250 8780
TIME...MOT...LOC 1948Z 330DEG 12KT 4247 8789

$$

TOWNSEND

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.