Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 13, NWS Milwaukee, WI

April 13, 2006Dodge County, Washington County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 13, 2006, 10:09 PM CDT for Dodge County, Washington County, Waukesha County, Wisconsin. It was in force for 66 min. 10 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: Apr 13, 2006, 10:09 PM CDT (03:09 UTC)
Expired: Apr 13, 2006, 11:15 PM CDT
In force: 66 min
Issued by: NWS Milwaukee, WI
Area: Counties, with a storm outline in the text

Counties Dodge County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 32 km from the middle of the area, began a volume at 03:09 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
Apr 13, 10:15 PM CDT	HAIL 1	2 W Oconomowoc, WI
Apr 13, 10:18 PM CDT	HAIL 2.75	Oconomowoc, WI	CORNER OF HIGHWAY P AND K...NE SIDE OF OCONOMOWOC. WINDOW BROKEN OUT OF SQUAD CAR.
Apr 13, 10:20 PM CDT	HAIL 1.75	Hartland, WI
Apr 13, 10:21 PM CDT	HAIL 0.5	Nashotah, WI
Apr 13, 10:23 PM CDT	HAIL 1.75	Ashippun, WI
Apr 13, 10:25 PM CDT	HAIL 1.75	5 Nw Hartland, WI
Apr 13, 10:27 PM CDT	HAIL 2	Merton, WI
Apr 13, 10:30 PM CDT	HAIL 0.5	8 S Hartford, WI
Apr 13, 10:53 PM CDT	HAIL 0.25	1 Nw Waukesha, WI
Apr 13, 10:58 PM CDT	HAIL 0.88	4 S Waukesha, WI	NEAR THE INTERSECTION OF HIGHWAYS 164 AND 59.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this severe thunderstorm warning; the first came 6 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 13, 8:24 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.2 hours before the alert went out and 141 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: 1721 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 543 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.

000 
WUUS53 KMKX 140310
SVRMKX
WIC027-131-133-140415-
/O.NEW.KMKX.SV.W.0013.060414T0309Z-060414T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1009 PM CDT THU APR 13 2006

THE NATIONAL WEATHER SERVICE IN MILWAUKEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DODGE COUNTY IN SOUTHEAST WISCONSIN
  WASHINGTON COUNTY IN SOUTHEAST WISCONSIN
  WAUKESHA COUNTY IN SOUTHEAST WISCONSIN

* UNTIL 1115 PM CDT

* AT 1005 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.      
  THIS STORM WAS LOCATED 11 MILES WEST OF DOUSMAN...OR ABOUT 8       
  MILES NORTHEAST OF JEFFERSON...AND MOVING EAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OKAUCHEE LAKE...DOUSMAN...NORTH PRAIRIE AND IRON RIDGE AROUND 1015
  PM CDT...
  HARTLAND...DELAFIELD...MERTON AND WALES AROUND 1020 PM CDT...
  PEWAUKEE AND WAUKESHA AROUND 1025 PM CDT...

LAT...LON 4351 8856 4285 8853 4285 8823 4313 8825
      4354 8823

$$
COLLAR/HENTZ

3 follow-up statements

000 
WWUS53 KMKX 140325
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1024 PM CDT THU APR 13 2006

WIC027-131-133-140415-
/O.CON.KMKX.SV.W.0013.000000T0000Z-060414T0415Z/
DODGE WI-WASHINGTON WI-WAUKESHA WI-
1024 PM CDT THU APR 13 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR WAUKESHA...WASHINGTON AND DODGE COUNTIES...

AT 1017 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO BASEBALL SIZE.  THIS
STORM WAS LOCATED NEAR OCONOMOWOC...OR ABOUT NEAR OKAUCHEE LAKE...
MOVING EAST AT 60 MPH.

AT 1018 PM CDT...LAW ENFORCEMENT REPORTED BASEBALL SIZE HAIL AT THE 
CORNER OF HIGWAY P AND K...ON THE NORTHEAST SIDE OF OCONOMOWOC. A 
WINDOW WAS BROKEN OUT OF THE SQUAD CAR. NUMEROUS OTHER REPORTS OF 
GOLFBALL TO BASEBALL SIZE HAIL HAVE BEEN REPORTED WITH THIS STORM. 
THIS IS A VERY DANGEROUS STORM

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT 
FRIDAY MORNING FOR SOUTH CENTRAL AND SOUTHEAST WISCONSIN.

LAT...LON 4351 8856 4285 8853 4285 8823 4313 8825
      4354 8823

$$

WOOD

000 
WWUS53 KMKX 140350
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1050 PM CDT THU APR 13 2006

WIC027-131-140357-
/O.CAN.KMKX.SV.W.0013.000000T0000Z-060414T0415Z/
DODGE WI-WASHINGTON WI-
1050 PM CDT THU APR 13 2006

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON AND DODGE COUNTIES
IS CANCELLED...

THE SEVERE THUNDERSTORMS THAT PROMPTED THE WARNING FOR WASHINGTON 
AND DODGE COUNTIES HAVE MOVED OUT OF THE AREA. THEREFORE...THE 
SEVERE THUNDERSTORM WARNING FOR WASHINGTON AND DODGE COUNTIES HAVE 
BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT 
FRIDAY MORNING FOR ALL OF SOUTH CENTRAL AND SOUTHEAST WISCONSIN.

LAT...LON 4318 8853 4285 8853 4285 8823 4313 8825
      4318 8824

$$

WIC133-140415-
/O.CON.KMKX.SV.W.0013.000000T0000Z-060414T0415Z/
WAUKESHA WI-
1050 PM CDT THU APR 13 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR WAUKESHA COUNTY...

AT 1043 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL
SIZE.  THIS STORM WAS LOCATED NEAR WALES...MOVING EAST AT 50 MPH.

NUMEROUS REPORTS OF HAIL UP TO GOLFBALL SIZE HAVE BEEN RECEIVED WITH 
THIS STORM. THIS IS A VERY DANGEROUS STORM

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT 
FRIDAY MORNING FOR ALL OF SOUTH CENTRAL AND SOUTHEAST WISCONSIN.

LAT...LON 4318 8853 4285 8853 4285 8823 4313 8825
      4318 8824

$$

WOOD

000 
WWUS53 KMKX 140415
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1115 PM CDT THU APR 13 2006

WIC133-140421-
/O.EXP.KMKX.SV.W.0013.000000T0000Z-060414T0415Z/
WAUKESHA WI-
1115 PM CDT THU APR 13 2006

...THE SEVERE THUNDERSTORM WARNING FOR WAUKESHA COUNTY EXPIRES AT
1115 PM CDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING FOR WAUKESHA 
COUNTY HAS MOVED OUT OF THE AREA. THEREFORE...THE SEVERE 
THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT 
FRIDAY MORNING FOR ALL OF SOUTH CENTRAL AND SOUTHEAST WISCONSIN.

LAT...LON 4318 8853 4285 8853 4285 8823 4313 8825
      4318 8824

$$

WOOD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 13, 3:34 PM CDT, 6 hours 35 minutes earlier.

Area forecast discussion, Apr 13, 3:34 PM CDT, 6 hours 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
334 PM CDT THU APR 13 2006

.DISCUSSION...FCST FOCUS ON SEVERE POSSIBILITIES WITH
THUNDERSTORMS TONIGHT...AND AGAIN ON SAT NIGHT/SUNDAY.

AS EXPECTED...RETURNS ON AREA 88-D RADARS PICKING UP BEGINNING OF
CONVECTIVE DEVELOPMENT IN SE MN AHEAD OF WEAK SHRT WAVE ON
DAKOTAS/MN BRDR AND IN MASS CONVERGENCE ZONE AS 30 KT 850 MB WINDS
ON SLATER IA PROFILER MOVE INTO RGN OF LIGHTER WINDS EVIDENCED
WITH 5-10 KTS ON BLUE RIVER PROFILER.

DIFFICULTY OF GETTING DEEP CONVECTION TONIGHT DUE TO LACK OF
MOISTURE INDICATED BY LACK OF CEILINGS BLO 12K FT IN AREA OF
DEVELOPING RADAR RETURNS. OVER SRN WI SFC DEW POINTS IN THE
40S...WITH SPC RIGHTFULLY INDICATING BEST CHC OF SEVERE WILL BE
ALONG AND SOUTH OF SHARP DEW POINT GRADIENT CURRENTLY ALONG A DSM
STL LINE...THAT LOOKS TO REMAIN SOUTH OF WI TONIGHT. HOWEVER 30 TO
40KT LOW LVL JET MAY BE ENOUGH TO FEED ELEVATED CONVECTION OVER
RGN THIS EVENING...BRINGING A CHC OF HAIL BEFORE TURNING WEST
AROUND 06Z AS TROF MOVES THRU.

NRLY WINDS FOR FRI THO WK CAA AS ZONAL FLOW AND THERMAL RDG AHEAD OF
WAVE ACROSS SRN CANADA KEEPS 850 TEMPS FROM DROPPING OVER CWA.
LOOKING FOR TEMPS IN THE 70S WITH CHC OF PCPN IN UNSTABLE AIRMASS
LIMITED TO LOCATIONS SOUTH OF WI IN BETTER 1000-850MB AND 850-700
MB FRONTOGENTIC FORCING AND Q VECTOR CONVERGENCE.

MORE VIGOROUS WAVE TO APPROACH AND BRING BETTER CHC FOR SEVERE ON
SAT NIGHT INTO SUNDAY AS WAVE BECOMES NEG TILTED AND CLOSES OFF.
SOME DIFFERENCES...BUT SIMILAR AGREEMENT IN BRINGING LOW LVL JET
INTO SW WI SAT BY 00Z...AND FORCING ALONG BAROCLINIC ZONE ACROSS
SRN WI SAT EVE.

PCPN LINGERS THRU SUNDAY AS CLOSED SYSTEM MOVES ACROSS WRN GRT
LAKES...WITH A DRY MONDAY INTO TUE. NEXT WAVE IN BUSY PATTERN TO
AFFECT RGN BEGINNING TUE AFTERNOON/EVE THRU WED. GFS SHOWING THIS
SYSTEM CLOSING OFF AND LINGERING INTO FRIDAY. THO SUPPORTED BY
POSITIVE HEIGHT ANOMALY OVER HUDSON BAY...WILL WAIT FOR SUPPORT
FROM LATER RUNS TO SPREAD PCPN CHS THRU THE END OF NEXT WEEK.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

09/09

Hazardous weather outlook, Apr 13, 5:20 PM CDT, 4 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
520 PM CDT THU APR 13 2006

WIZ046-047-051-052-056>060-062>072-141000-
COLUMBIA-DANE-DODGE-FOND DU LAC-GREEN-GREEN LAKE-IOWA-JEFFERSON-
KENOSHA-LAFAYETTE-MARQUETTE-MILWAUKEE-OZAUKEE-RACINE-ROCK-SAUK-
SHEBOYGAN-WALWORTH-WASHINGTON-WAUKESHA-
520 PM CDT THU APR 13 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN.

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT. LARGE HAIL
IS THE MAIN HAZARD...ALTHOUGH DAMAGING WINDS ARE ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON...WITH
THUNDERSTORMS BECOMING LIKELY SATURDAY NIGHT. THERE IS A SLIGHT RISK
OF SEVERE THUNDERSTORMS SATURDAY NIGHT...SOUTH OF A PRINCETON...TO
CAMPBELLSPORT...TO PORT WASHINGTON LINE.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AND SUNDAY EVENING...AND
AGAIN TUESDAY AFTERNOON INTO TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

LMZ643>646-665-141000-
NORTH POINT LIGHTHOUSE TO WIND POINT-
PORT WASHINGTON TO NORTH POINT LIGHTHOUSE-
SHEBOYGAN WI TO PORT WASHINGTON-
WIND POINT TO WINTHROP HARBOR ILLINOIS-
520 PM CDT THU APR 13 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT. LARGE HAIL
IS THE MAIN HAZARD...ALTHOUGH DAMAGING WINDS ARE ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SMALL CRAFT ADVISORY CONDITIONS MAY BE MET SATURDAY NIGHT THROUGH
SUNDAY.

THERE IS A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON...WITH
THUNDERSTORMS BECOMING LIKELY SATURDAY NIGHT. THERE IS A SLIGHT RISK
OF SEVERE THUNDERSTORMS SATURDAY NIGHT...SOUTH OF PORT WASHINGTON.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AND SUNDAY EVENING...AND
AGAIN TUESDAY AFTERNOON INTO TUESDAY NIGHT.

MBK

In the hours before

Local storm report, Apr 13, 9:45 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
945 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0938 PM     HAIL             1 NW MCFARLAND          43.03N 89.31W
04/13/2006  M1.50 INCH       DANE               WI   AMATEUR RADIO

&&

DRH

Local storm report, Apr 13, 9:49 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
949 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 PM     HAIL             3 SE BLUE MOUNDS        42.99N 89.78W
04/13/2006  M1.75 INCH       DANE               WI   PUBLIC

&&

DRH

Local storm report, Apr 13, 9:54 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
954 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0939 PM     HAIL             1 WSW SHOREWOOD HILLS   43.07N 89.46W
04/13/2006  M1.50 INCH       DANE               WI   AMATEUR RADIO

0945 PM     HAIL             COTTAGE GROVE           43.08N 89.20W
04/13/2006  M3.00 INCH       DANE               WI   TRAINED SPOTTER

&&

DRH

Local storm report, Apr 13, 9:55 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
955 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0937 PM     HAIL             MADISON                 43.08N 89.39W
04/13/2006  M2.00 INCH       DANE               WI   TRAINED SPOTTER

            UNIVERSITY OF WISCONSIN...MADISON CAMPUS.

&&

DRH

Local storm report, Apr 13, 9:56 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
956 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 PM     HAIL             MONONA                  43.05N 89.33W
04/13/2006  M3.00 INCH       DANE               WI   TRAINED SPOTTER

&&

DRH

Local storm report, Apr 13, 10:06 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1006 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0955 PM     HAIL             3 NW LAKE MILLS         43.10N 88.95W
04/13/2006  M4.25 INCH       JEFFERSON          WI   LAW ENFORCEMENT

            AT NEWVILLE ROAD AND INTERSTATE 94.

&&

DRH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:09 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	81 min
Apr 13, 8:58 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green	77 min
Apr 13, 9:45 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	45 min
Apr 13, 10:00 PM CDT	Severe Thunderstorm Warning	MKX	Rock	38 min
Apr 13, 10:07 PM CDT	Special Marine Warning	MKX		83 min
Apr 13, 10:12 PM CDT	Severe Thunderstorm Warning	MKX	Dane	18 min
Apr 13, 10:26 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	34 min
Apr 13, 10:29 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee	59 min
Apr 14, 12:13 AM CDT	Special Marine Warning	MKX		92 min
Apr 14, 12:19 AM CDT	Severe Thunderstorm Warning	MKX	Sheboygan	41 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2006 Every severe thunderstorm warning in 2006

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.