Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 24, NWS Milwaukee, WI

April 27, 2024Green County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 27, 2024, 6:07 PM CDT for Green County, Lafayette County, Wisconsin. It was in force for 53 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: Apr 27, 2024, 6:07 PM CDT (23:07 UTC)
Expired: Apr 27, 2024, 7:00 PM CDT
In force: 53 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Green County, WI, Lafayette County, WI

The radar

The Milwaukee radar (KMKX), 112 km from the middle of the area, began a volume at 23:06 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 27, 5:58 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.1 hours before the alert went out and 128 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: 392 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 673 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

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 Apr 27, 3:46 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Apr 27, 3:46 PM CDT, 2 hours 21 minutes before

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Hazardous weather outlook, Apr 27, 4:47 PM CDT, 1 hour 20 minutes before

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
447 PM CDT Sat Apr 27 2024

WIZ046-047-051-052-056>060-062>072-282200-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
447 PM CDT Sat Apr 27 2024

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

.DAY ONE...Tonight

Thunderstorms are expected to develop this afternoon into this
evening. Hail, damaging wind gusts, and isolated tornadoes are all
possible.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

Additional rounds of thunderstorms are expected Sunday and Sunday
night. There is only a marginal threat for these storms to become
severe. Localized heavy rain may result in urban and small stream
flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times this weekend, especially
this afternoon and evening.

LMZ643>646-282200-
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-
447 PM CDT Sat Apr 27 2024

This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.

.DAY ONE...Tonight

A Small Craft Advisory is in effect for gusty southwest winds into
the early evening. and building waves. Brisk northeast winds will
then develop toward sunrise Sunday.

Scattered thunderstorms are expected tonight and may be strong to
severe.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

A Small Craft Advisory continues Sunday into Monday for breezy
winds and high waves.

Additional rounds of thunderstorms are expected Sunday and Sunday
night.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-282200-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and North of a line from Charlevoix MI to South
Fox Island 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
447 PM CDT Sat Apr 27 2024

This Hazardous Weather Outlook is for the open waters of Lake
Michigan.

.DAY ONE...Tonight

Showers and thunderstorms are expected tonight. Some storms may
be strong to severe.

Wind gusts may approach or reach gale force late this afternoon,
especially over the northern half of the lake.

Areas of dense fog may redevelop over the northern half of the
lake this evening and over the southern half of the lake late
tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

Additional rounds of thunderstorms are expected Sunday into
Monday. Areas of dense fog is possible on Sunday.

www.weather.gov/mkx

In the hours before

Special weather statement, Apr 27, 5:03 PM CDT, 1 hour 4 minutes before

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Special weather statement, Apr 27, 5:05 PM CDT, 1 hour 2 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
505 PM CDT Sat Apr 27 2024

WIZ063-064-272230-
Jefferson WI-Dane WI-
505 PM CDT Sat Apr 27 2024

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL DANE AND NORTHERN
JEFFERSON COUNTIES THROUGH 530 PM CDT...

At 505 PM CDT, Doppler radar was tracking a strong thunderstorm over
Deerfield, or 7 miles west of Lake Mills, moving northeast at 45 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Watertown, Lake Mills, Johnson Creek, Deerfield, Cambridge, Lake
Ripley, Ixonia, Milford, Pipersville, Hubbleton, and Lake Lac La
Belle.

This includes the following highways...
 Interstate 94 between mile markers 251 and 275.
 Wisconsin Highway 26 between mile markers 31 and 43.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4307 8915 4320 8890 4320 8854 4309 8854
      4299 8910
TIME...MOT...LOC 2205Z 243DEG 37KT 4305 8904

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

CMILLER

Local storm report, Apr 27, 5:35 PM CDT, 32 minutes before

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
535 PM CDT Sat Apr 27 2024

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

0518 PM     Hail             Lake Mills              43.07N 88.91W
04/27/2024  M0.25 Inch       Jefferson          WI   Trained Spotter

&&

TP

Local storm report, Apr 27, 5:37 PM CDT, 30 minutes before

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
537 PM CDT Sat Apr 27 2024

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

0532 PM     Hail             2 WSW Watertown         43.18N 88.75W
04/27/2024  M0.50 Inch       Jefferson          WI   NWS Employee

            Reports of dime and pea sized hail.

&&

TP

Special weather statement, Apr 27, 5:52 PM CDT, 15 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
552 PM CDT Sat Apr 27 2024

WIZ058-059-272330-
Dodge WI-Washington WI-
552 PM CDT Sat Apr 27 2024

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL WASHINGTON AND
SOUTHEASTERN DODGE COUNTIES THROUGH 630 PM CDT...

At 551 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hartford, moving northeast at 40 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
West Bend, Hartford, Jackson, Slinger, Newburg, Iron Ridge, Addison,
Rubicon, Woodland, Neosho, Fillmore, Allenton, Keowns, Nabob, and
Saint Lawrence.

This includes the following highways...
 Interstate 41 between mile markers 64 and 74.
 U.S. Highway 45 between mile markers 64 and 73.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4336 8806 4325 8851 4340 8854 4354 8805
TIME...MOT...LOC 2251Z 241DEG 36KT 4332 8846

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

HALBACH

Special weather statement, Apr 27, 5:53 PM CDT, 14 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
553 PM CDT Sat Apr 27 2024

WIZ067-068-272345-
Green WI-Lafayette WI-
553 PM CDT Sat Apr 27 2024

...STRONG THUNDERSTORMS WILL IMPACT CENTRAL LAFAYETTE AND
NORTHWESTERN GREEN COUNTIES THROUGH 645 PM CDT...

At 553 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms near Darlington, moving east at 30 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Darlington, New Glarus, Monticello, Benton, Argyle, Blanchardville,
Wiota, Elk Grove, Fayette, Lamont, Calamine, Lead Mine, Jordan
Center, Yellowstone Lake St Park, and Woodford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4272 9040 4285 8965 4267 8953 4256 9040
TIME...MOT...LOC 2253Z 252DEG 27KT 4270 9004

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

CMILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 11:03 AM CDT	Marine Dense Fog Advisory	MKX		14 hr
Apr 27, 12:28 PM CDT	Wind Advisory	MKX	Fond du Lac, Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan and 2 more	4 hr
Apr 27, 3:54 PM CDT	Special Weather Statement	MKX	Rock	36 min
Apr 27, 5:03 PM CDT	Special Weather Statement	MKX	Lafayette	27 min
Apr 27, 5:05 PM CDT	Special Weather Statement	MKX	Jefferson	25 min
Apr 27, 5:17 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	43 min
Apr 27, 5:20 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson	29 min
Apr 27, 5:52 PM CDT	Special Weather Statement	MKX	Washington	38 min
Apr 27, 5:53 PM CDT	Special Weather Statement	MKX	Green, Lafayette	52 min
Apr 27, 6:15 PM CDT	Special Weather Statement	MKX	Sheboygan	45 min
Apr 27, 6:40 PM CDT	Tornado Warning	MKX	Green	16 min
Apr 27, 6:53 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	67 min
Apr 27, 6:54 PM CDT	Severe Thunderstorm Warning	MKX	Green	51 min
Apr 27, 6:58 PM CDT	Special Marine Warning	MKX		35 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2024 Every severe thunderstorm warning in 2024

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.