Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS Milwaukee, WI

June 29, 2017Rock County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this special weather statement at Jun 29, 2017, 12:51 AM CDT for Rock County, Walworth County, Wisconsin. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 29, 2017, 12:51 AM CDT (05:51 UTC)
Expired
Jun 29, 2017, 1:15 AM CDT
In force
24 min
Issued by
NWS Milwaukee, WI

Counties Rock County, WI, Walworth County, WI

The radar

The Milwaukee radar (KMKX), 34 km from the middle of the area, began a volume at 05:56 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.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.9 hours before the alert went out and 190 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 00:00Z on 2017-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1521 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 00:00Z on 2017-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 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
1521 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1099 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
2.7
Supercell composite
15.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 29, 12:37 AM CDT, 14 minutes earlier.

Area forecast discussion, Jun 29, 12:37 AM CDT, 14 minutes before
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Hazardous weather outlook, Jun 28, 9:38 PM CDT, 3 hours 13 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
938 PM CDT Wed Jun 28 2017

WIZ046-047-051-052-056>060-062>072-291200-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
938 PM CDT Wed Jun 28 2017

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin, and southeast Wisconsin.

.DAY ONE...Rest of Tonight

There is a chance of thunderstorms through the overnight hours.

A small threat of flash flooding also exists as some areas may
see repeated rounds of thunderstorms and heavy rain.

A Beach Hazard Statement is in effect into tonight for beaches in
Sheboygan County. Breezy southerly winds and high waves will
result in dangerous rip, structural, and longshore currents.

.DAYS TWO THROUGH SEVEN...Thursday through Wednesday

Thunderstorms are possible at times from Friday through Tuesday as
multiple low pressure systems move through the region.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will no longer be needed Tonight.

LMZ643>646-291200-
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-
938 PM CDT Wed Jun 28 2017

This Hazardous Weather Outlook is for portions of Lake Michigan.

.DAY ONE...Tonight

A Small Craft Advisory is in effect through tonight due to breezy
southerly winds and high waves.

There is a chance of thunderstorms through the overnight hours.

.DAYS TWO THROUGH SEVEN...Thursday through Wednesday

Thunderstorms are possible at times from Friday through Tuesday
as multiple low pressure systems move through the region.

Cronce

www.weather.gov/mkx

In the hours before

Local storm report, Jun 28, 10:11 PM CDT, 2 hours 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1011 PM CDT WED JUN 28 2017

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

0725 PM     TSTM WND DMG     4 ESE MCFARLAND         42.99N 89.23W
06/28/2017                   DANE               WI   TRAINED SPOTTER

            3 FOOT DIAMETER TREE SNAPPED.

&&
Special weather statement, Jun 28, 11:04 PM CDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1104 PM CDT WED JUN 28 2017

WIZ063-290430-
Dane-
1104 PM CDT WED JUN 28 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN DANE COUNTY...

At 1103 PM CDT, a strong thunderstorm was located near Belleville, or
near Oregon, moving northeast at 45 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Eastern Madison, Fitchburg, Stoughton, Verona, Oregon, McFarland,
Monona, Cottage Grove, Belleville, Brooklyn, Utica and Paoli.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4286 8937 4286 8954 4294 8960 4315 8916
      4289 8902 4284 8935 4285 8937
TIME...MOT...LOC 0403Z 247DEG 40KT 4291 8948

HENTZ
Special weather statement, Jun 28, 11:30 PM CDT, 1 hour 21 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1130 PM CDT WED JUN 28 2017

WIZ058-063-064-290500-
Dodge-Jefferson-Dane-
1130 PM CDT WED JUN 28 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN DANE...NORTHERN
JEFFERSON AND SOUTH CENTRAL DODGE COUNTIES...

At 1130 PM CDT, a strong thunderstorm was located over Deerfield, or
9 miles west of Lake Mills, moving northeast at 55 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Watertown, Jefferson, Lake Mills, Waterloo, Cottage Grove, Johnson
Creek, Deerfield, Cambridge, Lake Ripley, Milford, Utica, Richwood,
Rockdale, Hubbleton and Pipersville.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4289 8913 4305 8925 4320 8897 4328 8881
      4319 8868 4308 8857
TIME...MOT...LOC 0430Z 241DEG 47KT 4302 8909

HENTZ
Special weather statement, Jun 29, 12:00 AM CDT, 51 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1200 AM CDT THU JUN 29 2017

WIZ058-059-064-065-290530-
Dodge-Waukesha-Washington-Jefferson-
1200 AM CDT THU JUN 29 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN WAUKESHA...SOUTHWESTERN
WASHINGTON...NORTHEASTERN JEFFERSON AND SOUTHEASTERN DODGE
COUNTIES...

At 1159 PM CDT, a strong thunderstorm was located near Lac La Belle,
or 7 miles southeast of Watertown, moving east at 50 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Brookfield, Menomonee Falls, Watertown, Pewaukee, Sussex, Hartland,
Delafield, Jackson, Okauchee Lake, Oconomowoc, Merton, Lannon, Lac La
Belle, Richfield, Ixonia, Ashippun, Nashotah, Oconomowoc Lake,
Chenequa and Mapleton.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4302 8867 4319 8873 4333 8814 4310 8809
TIME...MOT...LOC 0459Z 256DEG 43KT 4313 8860

HENTZ
Special weather statement, Jun 29, 12:13 AM CDT, 38 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1213 AM CDT THU JUN 29 2017

WIZ068>070-290545-
Green-Walworth-Rock-
1213 AM CDT THU JUN 29 2017

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT GREEN...WALWORTH AND
ROCK COUNTIES...

At 1213 AM CDT, strong thunderstorms were clustered over Janesville,
moving east at 60 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Janesville, Beloit, Whitewater, Monroe, Elkhorn, Delavan, Lake
Geneva, Milton, Edgerton, Evansville, Brodhead, Williams Bay,
Walworth, Clinton, Fontana-On-Geneva Lake, Sharon, Darien,
Orfordville, Monticello and Albany.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4251 8980 4276 8970 4285 8910 4283 8843
      4249 8840 4249 8885
TIME...MOT...LOC 0513Z 267DEG 53KT 4264 8902

HENTZ
Special weather statement, Jun 29, 12:51 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 7:08 PM CDTSevere Thunderstorm WarningMKXDane, Jefferson67 min
Jun 28, 7:10 PM CDTAreal Flood AdvisoryMKXLafayette110 min
Jun 28, 7:11 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge34 min
Jun 28, 7:18 PM CDTFlash Flood WarningMKXLafayette3 hr
Jun 28, 7:22 PM CDTSevere Thunderstorm WarningMKXRock38 min
Jun 28, 7:38 PM CDTTornado WarningMKXRock22 min
Jun 28, 7:45 PM CDTSevere Thunderstorm WarningMKXWaukesha45 min
Jun 28, 7:47 PM CDTSevere Thunderstorm WarningMKXWalworth43 min
Jun 28, 8:13 PM CDTSpecial Marine WarningMKX92 min
Jun 28, 8:16 PM CDTSpecial Weather StatementMKXKenosha, Milwaukee, Racine44 min
Jun 28, 8:21 PM CDTAreal Flood AdvisoryMKXMilwaukee, Waukesha114 min
Jun 28, 8:26 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine34 min
Jun 28, 9:59 PM CDTSpecial Weather StatementMKXLafayette31 min
Jun 28, 10:20 PM CDTSevere Thunderstorm WarningMKXLafayette25 min
Jun 28, 10:44 PM CDTSevere Thunderstorm WarningMKXGreen, Lafayette31 min
Jun 28, 11:04 PM CDTSpecial Weather StatementMKXDane26 min
Jun 28, 11:13 PM CDTSevere Thunderstorm WarningMKXGreen32 min
Jun 28, 11:30 PM CDTSpecial Weather StatementMKXJefferson30 min
Jun 28, 11:38 PM CDTSevere Thunderstorm WarningMKXGreen, Rock23 min
Jun 29, 12:00 AM CDTSpecial Weather StatementMKXWaukesha30 min
Jun 29, 12:13 AM CDTSpecial Weather StatementMKXGreen, Rock, Walworth32 min
Jun 29, 1:15 AM CDTSpecial Weather StatementMKXWalworth60 min
Jun 29, 1:39 AM CDTSevere Thunderstorm WarningMKXKenosha, Racine, Walworth34 min
Jun 29, 1:45 AM CDTSpecial Marine WarningMKX90 min
Jun 29, 11:29 AM CDTRiver Flood WarningMKXKenosha3 days
Jun 29, 6:23 PM CDTRiver Flood WarningMKXGreen, Rock22 hr

Nearby

Special Weather Statements in Wisconsin, 2017Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.