Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 60, NWS Milwaukee, WI

August 14, 2015Jefferson County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 14, 2015, 7:14 PM CDT for Jefferson County, Waukesha County, Wisconsin. It was in force for 46 min. 4 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: Aug 14, 2015, 7:14 PM CDT (00:14 UTC)
Expired: Aug 14, 2015, 8:00 PM CDT
In force: 46 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jefferson County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 25 km from the middle of the area, began a volume at 00:16 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 14, 7:15 PM CDT	TSTM WND GST 55	Lannon, WI	LOCATION AT CORNER OF GOOD HOPE AND LANNON ROAD. TREES WERE SNAPPED AS WELL.
Aug 14, 7:33 PM CDT	HAIL 1	3 Nw Waukesha, WI
Aug 14, 7:48 PM CDT	HAIL 0.5	Waukesha, WI	3 MILES WEST OF CRITES FIELD. RELAYED VIA FACEBOOK.
Aug 14, 7:48 PM CDT	HAIL 0.88	4 Ese Delafield, WI	REPORTED ALONG I-94 BETWEEN DELAFIELD AND PEWAUKEE.

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 one storm report to this severe thunderstorm warning; the first came 19 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.2 hours before the alert went out and 157 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: 194 J/kg
Mixed-layer CIN: -276 J/kg
Mixed-layer LCL: 1837 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 144 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.

863 
WUUS53 KMKX 150014
SVRMKX
WIC055-133-150100-
/O.NEW.KMKX.SV.W.0060.150815T0014Z-150815T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
714 PM CDT FRI AUG 14 2015

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN JEFFERSON COUNTY IN SOUTHEASTERN WISCONSIN...
  WAUKESHA COUNTY IN SOUTHEASTERN WISCONSIN...

* UNTIL 800 PM CDT

* AT 714 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER HARTLAND...
  MOVING SOUTHWEST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  WAUKESHA...NEW BERLIN...BROOKFIELD...MENOMONEE FALLS...MUSKEGO...
  PEWAUKEE...SUSSEX...HARTLAND...DELAFIELD...ELM GROVE...WALES...
  OKAUCHEE LAKE...OCONOMOWOC...MERTON...DOUSMAN...NORTH PRAIRIE...
  BUTLER...LANNON...LAC LA BELLE AND NASHOTAH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4291 8810 4294 8854 4320 8854 4320 8842
      4319 8841 4319 8807 4305 8807
TIME...MOT...LOC 0014Z 024DEG 34KT 4309 8832 

HAIL...0.75IN
WIND...60MPH
 
$$

HENTZ

3 follow-up statements

839 
WWUS53 KMKX 150031
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
731 PM CDT FRI AUG 14 2015

WIC055-133-150100-
/O.CON.KMKX.SV.W.0060.000000T0000Z-150815T0100Z/
JEFFERSON WI-WAUKESHA WI-
731 PM CDT FRI AUG 14 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHEASTERN JEFFERSON AND WAUKESHA COUNTIES...

AT 731 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTH
PRAIRIE...OR NEAR WALES...AND IS NEARLY STATIONARY.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
WAUKESHA...NEW BERLIN...BROOKFIELD...MENOMONEE FALLS...MUSKEGO...
PEWAUKEE...SUSSEX...HARTLAND...DELAFIELD...ELM GROVE...WALES...
OKAUCHEE LAKE...OCONOMOWOC...MERTON...DOUSMAN...NORTH PRAIRIE...
BUTLER...LANNON...LAC LA BELLE AND NASHOTAH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4291 8810 4294 8854 4320 8854 4320 8842
      4319 8841 4319 8807 4305 8807
TIME...MOT...LOC 0031Z 024DEG 34KT 4296 8839 

HAIL...0.75IN
WIND...60MPH
 
$$

MBK

076 
WWUS53 KMKX 150048
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
748 PM CDT FRI AUG 14 2015

WIC055-133-150100-
/O.CON.KMKX.SV.W.0060.000000T0000Z-150815T0100Z/
JEFFERSON WI-WAUKESHA WI-
748 PM CDT FRI AUG 14 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHEASTERN JEFFERSON AND WAUKESHA COUNTIES...

AT 748 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTH
PRAIRIE...OR NEAR MUKWONAGO...MOVING SOUTH AT 20 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
WAUKESHA...NEW BERLIN...BROOKFIELD...MENOMONEE FALLS...MUSKEGO...
PEWAUKEE...SUSSEX...HARTLAND...DELAFIELD...ELM GROVE...WALES...
OKAUCHEE LAKE...OCONOMOWOC...MERTON...DOUSMAN...NORTH PRAIRIE...
BUTLER...LANNON...LAC LA BELLE AND NASHOTAH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4291 8810 4294 8854 4320 8854 4320 8842
      4319 8841 4319 8807 4305 8807
TIME...MOT...LOC 0048Z 003DEG 17KT 4292 8835 

HAIL...0.75IN
WIND...60MPH
 
$$

MBK

244 
WWUS53 KMKX 150059
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
759 PM CDT FRI AUG 14 2015

WIC055-133-150109-
/O.EXP.KMKX.SV.W.0060.000000T0000Z-150815T0100Z/
JEFFERSON WI-WAUKESHA WI-
759 PM CDT FRI AUG 14 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON AND
WAUKESHA COUNTIES WILL EXPIRE AT 800 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL
HAIL....GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4291 8810 4294 8854 4320 8854 4320 8842
      4319 8841 4319 8807 4305 8807
TIME...MOT...LOC 0058Z 024DEG 34KT 4292 8835 

$$

MBK

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 Aug 14, 2:13 PM CDT, 5 hours 1 minute earlier.

Area forecast discussion, Aug 14, 2:13 PM CDT, 5 hours 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
213 PM CDT FRI AUG 14 2015

.SHORT TERM...

.TONIGHT AND SATURDAY...FORECAST CONFIDENCE...MEDIUM

STILL LOOKS LIKE THERE WILL BE A CHANCE FOR STORMS THIS AFTERNOON AS
A WEAK WAVES MOVES THROUGH...THOUGH STRUGGLING TO GET MUCH IN THE
WAY OF CUMULUS RIGHT NOW. HRRR HAS THE BEST HANDLE ON CONVECTION TO
THE NORTH AND EAST OF THE FORECAST AREA THOUGH...AND STILL SHOWS
CONVECTION DEVELOPING ACROSS THE FORECAST AREA MID TO LATE
AFTERNOON. HAVE THUS MAINTAINED POPS FOR NOW.

THOUGH A FEW STORMS COULD HANG ON INTO LATE EVENING...ANY STORMS
THAT DO DEVELOP WILL LIKELY DIMINISH DURING THE EVENING AS DAYTIME
HEATING IS LOST. SHOULD SEE MOSTLY CLEAR SKIES THEN LATER IN THE
NIGHT. WITH LIGHT WINDS IN PLACE...MAY SEE SOME FOG
DEVELOP...ESPECIALLY IN LOW LYING AREAS.

UPPER RIDGING WILL CONTINUE TO BUILD INTO THE AREA SATURDAY. TEMPS
ALOFT LOOK FAIRLY SIMILAR TO TODAY...SO WENT WITH SIMILAR HIGH
TEMPS. ONLY BIG DIFFERENCE IS NEAR THE LAKE...WHERE WINDS WILL TURN
ONSHORE BY AFTERNOON...KEEPING IT FROM GETTING AS HOT AS INLAND. MAY
SEE A FEW STORMS FIRE WITHIN AREA OF LOW LEVEL CONVERGENCE IN THE
AFTERNOON. MODELS ARE HIGHLIGHTING A CORRIDOR FROM THE SE TO NW
FORECAST AS HAVING THE BEST CHANCE. OTHERWISE...NOT SEEING A TRIGGER
FOR CONVECTIVE DEVELOPMENT UNDER THE RIDGE.

.SATURDAY NIGHT AND SUNDAY...FORECAST CONFIDENCE...HIGH

THE UPPER RIDGE EXTENDS FROM THE SOUTHWEST U.S. ACROSS SOUTHERN
WISCONSIN. THE 700 MB WINDS INCREASE ACROSS THE UPPER GREAT LAKES
AND SOUTHERN CANADA...BUT REMAIN WEAK OVER SOUTHERN WISCONSIN. THE
850 MB WINDS INCREASE A LITTLE MORE...BUT THE STRONGEST WINDS ARE
TO THE NORTH. THE 850 MB TEMPERATURES REMAIN NEAR 20 CELSIUS AS
THE 500 MB TEMPERATURES INCREASE. DESPITE STEEP LOW LEVEL LAPSE
RATES...THE MID LEVEL LAPSE RATES ARE NEAR 6 CELSIUS/KM...WITH
ONLY A SHALLOW LAYER OF MOISTURE NEAR 700 MB. THEREFORE SUNDAY
SHOULD NOT HAVE ANY THUNDERSTORM DEVELOPMENT.

925 TEMPERATURES RISE TO AROUND 28 CELSIUS...SO ANOTHER HOT DAY
IS EXPECTED. MOST PLACES SHOULD GET TO AT LEAST 90. APPEARS STEEP
LAPSE RATES WILL MIX OUT DEW POINTS AGAIN DURING THE AFTERNOON
THEREFORE HEAT INDEX VALUES SHOULD REMAIN BELOW ADVISORY CRITERIA.

.SUNDAY NIGHT AND MONDAY...FORECAST CONFIDENCE...HIGH

THE UPPER RIDGE SAGS SOUTH WITH AN UPPER LEVEL ZONAL FLOW ACROSS
THE U.S. CANADIAN BORDER AREA DROPPING TOWARDS SOUTHERN WISCONSIN.
AN 115 KNOT 250 MB UPPER JET WILL LIFT NORTH OF THE UPPER GREAT
LAKES LATER MONDAY. THIS INCREASES THE UPPER DIVERGENCE ACROSS
SOUTHERN WISCONSIN IN THE RIGHT ENTRANCE REGION OF THE JET. THE
850 MB THERMAL RIDGE MOVES ACROSS SOUTHERN WISCONSIN BUT COOLS A
LITTLE AS IT DOES. 850 MB DEW POINTS INCREASE TO 10 TO 13 CELSIUS.
THE 850 MB WINDS ARE RATHER WEAK AROUND 20 KNOTS.

A WEAK COLD FRONT MOVES TOWARDS SOUTHERN WISCONSIN DURING THIS
PERIOD BUT THE FRONTAL PASSAGE IS SLOWER AND DOES NOT MOVE ACROSS
SOUTHERN WISCONSIN YET ON THE GFS.

ZERO TO 1 KM CAPE IS WEAKER AT ONLY AROUND 500 TO 1000 JOULES/KG
WITH MID LEVEL LAPSE RATES AROUND 5.7 CELSIUS/KM. THE GFS HAS
SOME PRECIPITATION MONDAY...BUT IT IS FAIRLY LIGHT.

.LONG TERM...

.MONDAY NIGHT AND TUESDAY...FORECAST CONFIDENCE...MEDIUM

THE UPPER LEVEL ZONAL FLOW BECOMES MORE WEST SOUTHWEST AS A
SHORTWAVE MOVES ACROSS THE NORTHERN ROCKIES.

THE GFS STALLS THE FRONT ACROSS SOUTHERN WISCONSIN AS HIGH
PRESSURE MOVES ACROSS LAKE SUPERIOR AND SOUTHERN CANADA.

THE 00Z ECMWF STALLS THE FRONT ACROSS NORTHERN OR CENTRAL
ILLINOIS. AS A RESULT THE GFS BRINGS A MODERATE AMOUNT OF
PRECIPITATION TUESDAY...WHILE THE 00Z ECMWF IS MAINLY DRY.

.TUESDAY NIGHT AND WEDNESDAY...FORECAST CONFIDENCE...MEDIUM

THE GFS AND ECMWF MOVES THE TROUGH ACROSS THE UPPER AND MID
MISSISSIPPI VALLEY LATER WEDNESDAY AND WEDNESDAY NIGHT.

PRECIPITATION CONTINUES TUESDAY NIGHT AND WEDNESDAY AS THE GFS
TAKES A STRONG LOW INTO NORTHERN WISCONSIN. PREFER THE WEAKER AND
SLOWER LOW ON THE ECMWF WHICH BRINGS MOST OF THE PRECIPITATION
WEDNESDAY.

.THURSDAY AND FRIDAY...FORECAST CONFIDENCE...MEDIUM

A ZONAL FLOW AGAIN DEVELOPS IN THE MID/UPPER LEVELS ACROSS THE
NORTHERN U.S. WITH THE ECMWF SHOWING MORE OF A TROUGH NEAR THE
NORTHWEST U.S. FRIDAY.

BOTH THE GFS AND ECMWF ARE DRY THURSDAY...WITH THE 12Z GFS
BRINGING A QUICKER SOUTH FLOW AND WARM AIR ADVECTION.

BOTH THE 12Z GFS AND 00Z ECMWF KEEP A LOW OVER THE HIGH PLAINS
FRIDAY WITH SOME PRECIPITATION MAINLY JUST NORTHWEST OF THE
FORECAST AREA.

&&

.AVIATION/00Z TAFS/...

STILL THINK A FEW STORMS MAY DEVELOP THIS AFTERNOON AS A WEAK WAVE
MOVES THROUGH. ANY STORMS THAT TO FORM WILL PROBABLY DIMINISH IN THE
EVENING AS DAYTIME HEATING IS LOST.

COULD SEE SOME FOG IN A FEW SPOTS TONIGHT...ESPECIALLY IN LOW LYING
AREAS. OTHERWISE...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
SATURDAY.

A COUPLE MODELS ARE FIRING OFF A FEW STORMS SATURDAY AFTERNOON
WITHIN A ZONE OF LOW LEVEL CONVERGENCE. MODELS ARE HIGHLIGHTING A
CORRIDOR FROM THE SE TO NW FORECAST AS HAVING THE BEST CHANCE.
OTHERWISE...LOOKS MAINLY DRY AS STRONG UPPER RIDGING LEANS EASTWARD
INTO THE AREA.

&&

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

TONIGHT/SATURDAY AND AVIATION/MARINE...DDV
SATURDAY NIGHT THROUGH FRIDAY...HENTZ

Hazardous weather outlook, Aug 14, 3:20 PM CDT, 3 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
320 PM CDT FRI AUG 14 2015

WIZ046-047-051-052-056>060-062>072-152030-
MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE-
WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE-
LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA-
320 PM CDT FRI AUG 14 2015

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

.DAY ONE...TONIGHT

HEAT INDEX VALUES WILL APPROACH 95 THROUGH LATE AFTERNOON.

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING
WITH PASSAGE OF A WEAK TROUGH. THERE IS A MARGINAL RISK OF SEVERE
THUNDERSTORMS WITH STRONG WINDS AND HAIL MAINLY NORTH OF A SPRING
GREEN TO BELOIT LINE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

HEAT INDEX VALUES WILL BE AROUND 95 SATURDAY AFTERNOON AND EARLY
EVENING...WITH SOME COOLING POSSIBLE ALONG THE LAKE MICHIGAN
SHORE. HEAT INDEX VALUES WILL APPROACH 95 AGAIN SUNDAY AFTERNOON
AND EARLY EVENING.

CHANCES FOR THUNDERSTORMS RETURN LATE SUNDAY NIGHT THROUGH MONDAY
NIGHT AS A COLD FRONT MOVES THROUGH THE REGION.

LOW PRESSURE MOVING TOWARD WISCONSIN WEDNESDAY WILL BRING CHANCES
FOR THUNDERSTORMS TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...WITH THE
CHANCE FOR STORMS LINGERING THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

LMZ643>646-152030-
SHEBOYGAN TO PORT WASHINGTON WI-
PORT WASHINGTON TO NORTH POINT LIGHT WI-
NORTH POINT LIGHT TO WIND POINT WI-
WIND POINT WI TO WINTHROP HARBOR IL-
320 PM CDT FRI AUG 14 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS...INTO THE EVENING...WITH
PASSAGE OF A WEAK TROUGH. THE STORMS COULD PRODUCE STRONG WINDS
AND HAIL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

CHANCES FOR THUNDERSTORMS RETURN MONDAY AND MONDAY NIGHT WITH A
COLD FRONT.

LOW PRESSURE MOVING TOWARD WISCONSIN WEDNESDAY WILL BRING CHANCES
FOR THUNDERSTORMS TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...WITH THE
CHANCE FOR STORMS LINGERING THROUGH THURSDAY.

HENTZ

WWW.WEATHER.GOV/MKX

In the hours before

Local storm report, Aug 14, 6:27 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
627 PM CDT FRI AUG 14 2015

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

0559 PM     TSTM WND GST     SHEBOYGAN               43.75N 87.72W
08/14/2015  M46 MPH          SHEBOYGAN          WI   C-MAN STATION

            SUSTAINED 34 MPH WIND SPEED.

&&

SCHULTZ

Special weather statement, Aug 14, 6:47 PM CDT, 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
647 PM CDT FRI AUG 14 2015

WIZ051-052-058>060-150015-
SHEBOYGAN-OZAUKEE-FOND DU LAC-WASHINGTON-DODGE-
647 PM CDT FRI AUG 14 2015

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN WASHINGTON
AND WESTERN OZAUKEE COUNTIES...

AT 645 PM CDT...AN AREA OF STRONG THUNDERSTORMS WAS OVER WEST BEND...
MOVING SOUTHEAST AT 35 MPH.

WINDS IN EXCESS OF 30 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
WEST BEND...MEQUON...GRAFTON...CEDARBURG...PORT WASHINGTON...
JACKSON...SAUKVILLE...KEWASKUM...THIENSVILLE...FREDONIA...NEWBURG...
GERMANTOWN...ADDISON...FILLMORE...WAUBEKA...ALLENTON...NENNO...
KOHLSVILLE AND BOLTONVILLE.

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

LAT...LON 4344 8844 4357 8814 4343 8787 4321 8796
TIME...MOT...LOC 2345Z 325DEG 36KT 4345 8818

HENTZ

Local storm report, Aug 14, 6:48 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
648 PM CDT FRI AUG 14 2015

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

0556 PM     TSTM WND DMG     7 NNW SHEBOYGAN         43.84N 87.77W
08/14/2015                   SHEBOYGAN          WI   BROADCAST MEDIA

            LEADERBOARD AT PGA GOLF CHAMPIONSHIP AT WHISTLING STRAITS
            WAS BLOWN OVER. TIME ESTIMATED BY RADAR. IMAGES RELAYED
            VIA TWITTER.

&&

SCHULTZ

Special weather statement, Aug 14, 6:48 PM CDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
648 PM CDT FRI AUG 14 2015

WIZ051-058-150015-
FOND DU LAC-DODGE-
648 PM CDT FRI AUG 14 2015

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN DODGE AND
CENTRAL FOND DU LAC COUNTIES...

AT 648 PM CDT...AN AREA OF STRONG THUNDERSTORMS WAS NEAR ROSENDALE...
OR 7 MILES NORTHWEST OF NORTH FOND DU LAC...MOVING SOUTHEAST AT 30
MPH.

WINDS IN EXCESS OF 30 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
FOND DU LAC...NORTH FOND DU LAC...LOMIRA...OAKFIELD...ROSENDALE...
TAYCHEEDAH...LAMARTINE...BYRON...EDEN...BROWNSVILLE...PEEBLES...
KNOWLES...OAK CENTER...WAUCOUSTA AND WEST ROSENDALE.

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

LAT...LON 4369 8817 4352 8852 4387 8877 4390 8869
      4389 8841 4394 8840 4394 8837
TIME...MOT...LOC 2348Z 324DEG 27KT 4386 8861

HENTZ

Local storm report, Aug 14, 6:59 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
659 PM CDT FRI AUG 14 2015

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

0556 PM     TSTM WND DMG     7 NNW SHEBOYGAN         43.84N 87.77W
08/14/2015                   SHEBOYGAN          WI   BROADCAST MEDIA

            FLAG POLE BLOWN OVER AT WHISTLING STRAITS GOLF COURSE.
            FLAG POLE FELL ON AN INDIVIDUAL...BREAKING INDIVIDUALS
            ARM. TIME ESTIMATED BY RADAR.

&&

SCHULTZ

Special weather statement, Aug 14, 7:10 PM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
710 PM CDT FRI AUG 14 2015

WIZ058-059-064-065-150045-
JEFFERSON-WAUKESHA-WASHINGTON-DODGE-
710 PM CDT FRI AUG 14 2015

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN
WASHINGTON...EAST CENTRAL JEFFERSON...SOUTHEASTERN DODGE AND WAUKESHA
COUNTIES...

AT 709 PM CDT...AN AREA OF STRONG THUNDERSTORMS WAS OVER PEWAUKEE...
MOVING SOUTH AT 50 MPH.

WIND GUSTS OF 50 TO 55 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
WAUKESHA...WAUWATOSA...NEW BERLIN...BROOKFIELD...MENOMONEE FALLS...
MUSKEGO...PEWAUKEE...SUSSEX...HARTLAND...DELAFIELD...ELM GROVE...
WALES...OKAUCHEE LAKE...OCONOMOWOC...MERTON...DOUSMAN...BUTLER...BIG
BEND...LANNON AND LAC LA BELLE.

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

LAT...LON 4289 8815 4309 8864 4329 8846 4318 8806
      4300 8807
TIME...MOT...LOC 0009Z 008DEG 43KT 4308 8826

HENTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 7:08 PM CDT	Special Marine Warning	MKX		97 min
Aug 14, 7:10 PM CDT	Special Weather Statement	MKX	Waukesha	35 min
Aug 14, 7:16 PM CDT	Special Weather Statement	MKX	Milwaukee, Racine	29 min
Aug 14, 7:33 PM CDT	Special Weather Statement	MKX	Walworth	27 min
Aug 14, 7:44 PM CDT	Special Weather Statement	MKX	Kenosha	31 min
Aug 14, 8:55 PM CDT	Special Weather Statement	MKX	Walworth	35 min
Aug 14, 9:56 PM CDT	Special Weather Statement	MKX	Rock	34 min
Aug 14, 10:04 PM CDT	Severe Thunderstorm Warning	MKX	Rock	26 min
Aug 15, 8:12 AM CDT	Special Weather Statement	MKX	Green	33 min
Aug 15, 1:20 PM CDT	Special Weather Statement	MKX	Rock	25 min
Aug 15, 1:27 PM CDT	Special Weather Statement	MKX	Dane	33 min
Aug 15, 1:46 PM CDT	Special Weather Statement	MKX	Rock	29 min
Aug 15, 2:19 PM CDT	Special Weather Statement	MKX	Rock	26 min
Aug 15, 2:37 PM CDT	Special Weather Statement	MKX	Kenosha	23 min
Aug 15, 2:41 PM CDT	Special Weather Statement	MKX	Rock	19 min
Aug 15, 2:49 PM CDT	Special Weather Statement	MKX	Kenosha	11 min
Aug 15, 3:09 PM CDT	Special Weather Statement	MKX	Kenosha	21 min
Aug 15, 3:44 PM CDT	Special Weather Statement	MKX	Green	16 min
Aug 15, 4:07 PM CDT	Special Weather Statement	MKX	Rock	23 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2015 Every severe thunderstorm warning in 2015

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.