Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 44, NWS Milwaukee, WI

July 18, 2012Green County, Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 18, 2012, 5:27 PM CDT for Green County, Rock County, Wisconsin. It was in force for 33 min. 3 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
Jul 18, 2012, 5:27 PM CDT (22:27 UTC)
Expired
Jul 18, 2012, 6:00 PM CDT
In force
33 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Green County, WI, Rock County, WI

The radar

The Milwaukee radar (KMKX), 66 km from the middle of the area, began a volume at 22:28 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

TimeReportWhereRemark
Jul 18, 5:43 PM CDTHAIL 1Evansville, WI
Jul 18, 5:50 PM CDTTSTM WND DMG2 N Orfordville, WIMULTIPLE HEALTHY BRANCHES DOWNED...SIX INCHES IN DIAMETER...AT A LOCATION ALONG HIGHWAY 213. TIME BASED ON RADAR.
Jul 18, 5:50 PM CDTHAIL 24 N Orfordville, WISIGNIFICANT HAIL DAMAGE TO A FARM HOUSE...LARGE HOLES PUNCHED IN ROOF. TIME AND HAIL SIZE ESTIMATED BASED ON RADAR.

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.

IssuedProductOfficeLasted
Jul 18, 12:58 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.5 hours before the alert went out and 161 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2012-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1900 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2012-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1900 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1674 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
44 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.

422 
WUUS53 KMKX 182227
SVRMKX
WIC045-105-182300-
/O.NEW.KMKX.SV.W.0044.120718T2227Z-120718T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
527 PM CDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GREEN COUNTY IN SOUTH CENTRAL WISCONSIN...
  NORTHWESTERN ROCK COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 600 PM CDT

* AT 523 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
  NEAR EVANSVILLE...AND MOVING EAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  EVANSVILLE AROUND 540 PM CDT.
  FOOTVILLE AROUND 555 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
MAGNOLIA...UNION...COOKSVILLE AND FULTON.

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 4281 8950 4285 8935 4285 8908 4269 8902
      4263 8944
TIME...MOT...LOC 2227Z 255DEG 10KT 4274 8935
WIND...HAIL 60MPH 1.25IN

$$

BROOKS
1 follow-up statement
709 
WWUS53 KMKX 182240
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
540 PM CDT WED JUL 18 2012

WIC045-182250-
/O.CAN.KMKX.SV.W.0044.000000T0000Z-120718T2300Z/
GREEN WI-
540 PM CDT WED JUL 18 2012

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

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

LAT...LON 4267 8937 4280 8937 4285 8935 4284 8918
      4285 8917 4285 8908 4269 8902
TIME...MOT...LOC 2240Z 255DEG 10KT 4275 8930

$$

WIC105-182300-
/O.CON.KMKX.SV.W.0044.000000T0000Z-120718T2300Z/
ROCK WI-
540 PM CDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
ROCK COUNTY UNTIL 600 PM CDT...

AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP TO
TENNIS BALL SIZE...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS
STORM WAS LOCATED NEAR EVANSVILLE...MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  EVANSVILLE AROUND 545 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE UNION...
COOKSVILLE AND FULTON.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4267 8937 4280 8937 4285 8935 4284 8918
      4285 8917 4285 8908 4269 8902
TIME...MOT...LOC 2240Z 255DEG 10KT 4275 8930
WIND...HAIL 60MPH 2.50IN

$$

CRAVEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 6:41 AM CDTAreal Flood AdvisoryMKXDane3 hr
Jul 18, 5:34 PM CDTSevere Thunderstorm WarningMKXGreen, Lafayette32 min
Jul 18, 5:36 PM CDTSevere Thunderstorm WarningMKXIowa, Sauk39 min
Jul 18, 5:51 PM CDTSevere Thunderstorm WarningMKXRock39 min
Jul 18, 6:03 PM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Green, Iowa, Sauk42 min
Jul 18, 6:19 PM CDTSevere Thunderstorm WarningMKXGreen, Lafayette26 min
Jul 18, 6:21 PM CDTSevere Thunderstorm WarningMKXRock54 min
Jul 18, 6:41 PM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Dodge, Green, Iowa, Jefferson and 3 more49 min
Jul 18, 6:43 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge, Sauk62 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every 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.