Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 38, NWS Milwaukee, WI

May 28, 20126 counties in Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 28, 2012, 6:27 PM CDT for 6 counties in Wisconsin. It was in force for 48 min. 5 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
May 28, 2012, 6:27 PM CDT (23:27 UTC)
Expired
May 28, 2012, 7:15 PM CDT
In force
48 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Green County, WI, Jefferson County, WI, Milwaukee County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 17 km from the middle of the area, began a volume at 23:31 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
May 28, 6:45 PM CDTTSTM WND GST 50Whitewater, WISOUTHWESTERLY WIND GUST
May 28, 6:50 PM CDTTSTM WND DMG2 E Palmyra, WILARGE BRANCHES UP TO 12 INCHES IN DIAMETER DISCOVERED LYING NEAR INTERSECTION OF HIGHWAY 59 AND COUNTY Z. SOME BRANCHES WERE FOUND ON THE OTHER SIDE OF THE ROAD...50 FEET FROM WHERE THEY WERE BROKEN OFF TREES. TIME OF EVENT ESTIMATED FROM RADAR.
May 28, 7:03 PM CDTTSTM WND GST 47East Troy, WIDW3201
May 28, 7:13 PM CDTTSTM WND DMG2 Sw Waukesha, WITREE DOWN ON ROADWAY.
May 28, 7:18 PM CDTTSTM WND DMGWaukesha, WITREE DOWN ON ROADWAY

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
May 28, 12:54 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.5 hours before the alert went out and 186 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, Green Bay/Straub, WI at 12:00Z on 2012-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 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, Green Bay/Straub, WI at 12:00Z on 2012-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.19395878Sfc1 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
42 J/kg
Mixed-layer CIN
-178 J/kg
Mixed-layer LCL
1757 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
158 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.

120 
WUUS53 KMKX 282327
SVRMKX
WIC045-055-079-105-127-133-290015-
/O.NEW.KMKX.SV.W.0038.120528T2327Z-120529T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
627 PM CDT MON MAY 28 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GREEN COUNTY IN SOUTH CENTRAL WISCONSIN...
  SOUTHERN JEFFERSON COUNTY IN SOUTHEAST WISCONSIN...
  NORTHWESTERN MILWAUKEE COUNTY IN SOUTHEAST WISCONSIN...
  ROCK COUNTY IN SOUTH CENTRAL WISCONSIN...
  NORTHERN WALWORTH COUNTY IN SOUTHEAST WISCONSIN...
  WAUKESHA COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 715 PM CDT

* AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM JEFFERSON TO 6 MILES SOUTH OF BRODHEAD...AND MOVING EAST AT 45
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  MILTON...DOWNTOWN JANESVILLE...WHITEWATER...DELAFIELD...HARTLAND...
  SUSSEX...WALES...PEWAUKEE...MENOMONEE FALLS...DOWNTOWN WAUKESHA...
  BROWN DEER...BROOKFIELD...MUKWONAGO...ELM GROVE...EAST TROY...
  ELKHORN...JANESVILLE AIRPORT...DOUSMAN...LAPHAM PEAK STATE PARK AND
  PALMYRA.

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 4299 8884 4319 8806 4319 8790 4268 8851
      4250 8931 4250 8947
TIME...MOT...LOC 2327Z 248DEG 38KT 4304 8863 4255 8925
WIND...HAIL 60MPH <.75IN

$$

WIMBERLEY
2 follow-up statements
003 
WWUS53 KMKX 282348
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
648 PM CDT MON MAY 28 2012

WIC045-282358-
/O.CAN.KMKX.SV.W.0038.000000T0000Z-120529T0015Z/
GREEN WI-
648 PM CDT MON MAY 28 2012

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

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

LAT...LON 4258 8896 4269 8921 4287 8890 4302 8871
      4319 8806 4319 8790 4268 8851
TIME...MOT...LOC 2348Z 246DEG 60KT 4309 8842 4287 8851
          4275 8865

$$

WIC055-079-105-127-133-290015-
/O.CON.KMKX.SV.W.0038.000000T0000Z-120529T0015Z/
MILWAUKEE WI-JEFFERSON WI-WAUKESHA WI-WALWORTH WI-ROCK WI-
648 PM CDT MON MAY 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
ROCK...NORTHERN WALWORTH...WAUKESHA...SOUTHEASTERN JEFFERSON AND
NORTHWESTERN MILWAUKEE COUNTIES UNTIL 715 PM CDT...

AT 645 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM DOUSMAN TO PALMYRA TO 7 MILES SOUTH OF WHITEWATER...MOVING
NORTHEAST AT 60 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  DELAFIELD...HARTLAND...WALES...PEWAUKEE...SUSSEX...EAST TROY...
  DOWNTOWN WAUKESHA...MUKWONAGO...MENOMONEE FALLS...BROOKFIELD...ELM
  GROVE...BROWN DEER...LAPHAM PEAK STATE PARK...NORTH PRAIRIE...
  WAUKESHA AIRPORT...LANNON...POTTER LAKE...BUTLER...MILWAUKEE
  TIMMERMAN AIRPORT AND RIVER HILLS.

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 4258 8896 4269 8921 4287 8890 4302 8871
      4319 8806 4319 8790 4268 8851
TIME...MOT...LOC 2348Z 246DEG 50KT 4309 8842 4287 8851
          4275 8865
WIND...HAIL 60MPH 0.75IN

$$

CRAVEN
628 
WWUS53 KMKX 290007
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
707 PM CDT MON MAY 28 2012

WIC055-079-105-127-133-290017-
/O.EXP.KMKX.SV.W.0038.000000T0000Z-120529T0015Z/
MILWAUKEE WI-JEFFERSON WI-WAUKESHA WI-WALWORTH WI-ROCK WI-
707 PM CDT MON MAY 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ROCK...NORTHERN
WALWORTH...WAUKESHA...SOUTHEASTERN JEFFERSON AND NORTHWESTERN
MILWAUKEE COUNTIES WILL EXPIRE AT 715 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA.  HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THESE THUNDERSTORMS.

LAT...LON 4258 8896 4269 8921 4287 8890 4302 8871
      4319 8806 4319 8790 4268 8851
TIME...MOT...LOC 0007Z 246DEG 50KT 4319 8808 4297 8818
          4285 8832

$$

CRAVEN

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 3:49 PM CDTSevere Thunderstorm WarningMKXColumbia, Sauk32 min
May 28, 4:07 PM CDTSevere Thunderstorm WarningMKXMarquette38 min
May 28, 4:33 PM CDTSevere Thunderstorm WarningMKXGreen Lake42 min
May 28, 4:54 PM CDTSevere Thunderstorm WarningMKXDane51 min
May 28, 5:00 PM CDTSevere Thunderstorm WarningMKXFond du Lac60 min
May 28, 5:05 PM CDTSevere Thunderstorm WarningMKXDane, Green, Rock55 min
May 28, 5:33 PM CDTSpecial Marine WarningMKX117 min
May 28, 5:39 PM CDTSevere Thunderstorm WarningMKXDane, Dodge, Jefferson, Rock, Walworth51 min
May 28, 6:23 PM CDTSevere Thunderstorm WarningMKXDodge, Jefferson, Ozaukee, Sheboygan, Washington, Waukesha52 min
May 28, 6:29 PM CDTSpecial Marine WarningMKX91 min
May 28, 6:42 PM CDTSmall Craft AdvisoryMKX2 hr

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.