Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 43, NWS Milwaukee, WI

August 5, 2019Iowa County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 5, 2019, 10:03 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 5, 2019, 10:03 PM CDT (03:03 UTC)
Expired: Aug 5, 2019, 10:45 PM CDT
In force: 42 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iowa County, WI, Lafayette County, WI

The radar

The Milwaukee radar (KMKX), 130 km from the middle of the area, began a volume at 03:04 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, 3.1 hours before the alert went out and 138 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: 19 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 1668 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

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 5, 9:36 PM CDT, 27 minutes earlier.

Area forecast discussion, Aug 5, 9:36 PM CDT, 27 minutes before

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Hazardous weather outlook, Aug 5, 9:47 PM CDT, 16 minutes before

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In the hours before

Special weather statement, Aug 5, 8:25 PM CDT, 1 hour 38 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
825 PM CDT Mon Aug 5 2019

WIZ051-057>059-063-060200-
Dodge-Columbia-Washington-Fond Du Lac-Dane-
825 PM CDT Mon Aug 5 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT FOND DU LAC...
COLUMBIA...NORTHEASTERN DANE...NORTHWESTERN WASHINGTON AND DODGE
COUNTIES...

At 824 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Southern Lake Winnebago to near
Beaver Dam to Portage. Movement was southeast at 45 mph.

Winds of 40 to 50 mph are possible with these storms.

Locations impacted include...
Fond Du Lac, Watertown, Beaver Dam, Waupun, Portage, Windsor,
Mayville, North Fond Du Lac, Columbus, Kewaskum, Horicon, Juneau,
Lake Wisconsin, Deforest, Poynette, Lomira, Pardeeville,
Campbellsport, Fall River and Theresa.

LAT...LON 4364 8816 4354 8816 4354 8815 4321 8867
      4321 8948 4360 8956 4357 8895 4390 8856
      4389 8841 4392 8840
TIME...MOT...LOC 0124Z 330DEG 38KT 4388 8849 4352 8891 4355 8943

KUROSKI

Special weather statement, Aug 5, 8:49 PM CDT, 1 hour 14 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
849 PM CDT Mon Aug 5 2019

WIZ051-052-058>060-064>066-060245-
Dodge-Waukesha-Sheboygan-Milwaukee-Ozaukee-Washington-Fond Du
Lac-Jefferson-
849 PM CDT Mon Aug 5 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT OZAUKEE...SOUTHEASTERN
FOND DU LAC...MILWAUKEE...WAUKESHA...WASHINGTON...JEFFERSON...
SOUTHERN SHEBOYGAN AND SOUTHERN DODGE COUNTIES...

At 849 PM CDT, radar indicated strong thunderstorms were located
along a line extending from 7 miles east of Sheboygan, to near
Campbellsport, to near Watertown, to near Waterloo. Movement was
southeast at 40 mph.

Winds of 30 to 40 mph are possible with these storms.

Locations impacted include...
Milwaukee, Waukesha, West Allis, Sheboygan, Wauwatosa, New Berlin,
Brookfield, Greenfield, Menomonee Falls, Oak Creek, West Bend,
Muskego, Watertown, Mequon, South Milwaukee, Cudahy, Hartford,
Whitefish Bay, Greendale and Pewaukee.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4357 8779 4349 8779 4338 8787 4326 8791
      4307 8787 4302 8790 4294 8784 4284 8784
      4284 8869 4309 8901 4331 8901 4330 8886
      4348 8847 4366 8830 4375 8771 4368 8770
TIME...MOT...LOC 0149Z 312DEG 36KT 4374 8757 4361 8822 4344 8839 4325
8879 4315 8892

WOOD

Special weather statement, Aug 5, 9:03 PM CDT, 1 hour before

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Special weather statement, Aug 5, 9:09 PM CDT, 54 minutes before

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Special weather statement, Aug 5, 9:37 PM CDT, 26 minutes before

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Local storm report, Aug 5, 9:47 PM CDT, 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 7:20 PM CDT	Special Weather Statement	MKX	Green Lake, Marquette	40 min
Aug 5, 7:30 PM CDT	Severe Thunderstorm Warning	MKX	Green Lake, Marquette	30 min
Aug 5, 7:57 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge, Fond du Lac, Green Lake, Marquette	33 min
Aug 5, 8:07 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	38 min
Aug 5, 8:25 PM CDT	Special Weather Statement	MKX	Columbia, Dodge, Fond du Lac	35 min
Aug 5, 8:33 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	27 min
Aug 5, 8:49 PM CDT	Special Weather Statement	MKX	Jefferson, Milwaukee, Ozaukee, Sheboygan, Washington, Waukesha	56 min
Aug 5, 9:03 PM CDT	Special Weather Statement	MKX	Columbia	42 min
Aug 5, 9:09 PM CDT	Special Weather Statement	MKX	Dane, Iowa	81 min
Aug 5, 9:37 PM CDT	Special Weather Statement	MKX	Dane, Green, Jefferson, Kenosha, Milwaukee, Racine and 3 more	53 min
Aug 5, 10:47 PM CDT	Special Weather Statement	MKX	Green	43 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2019 Every severe thunderstorm warning in 2019

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.