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Greendale, WI Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: Greendale, WI
Elevation: 781ft
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Active Weather Alerts

Tornado Watch
Issued: 1:39 AM Apr. 15, 2026 – National Weather Service
TORNADO WATCH 109 REMAINS VALID UNTIL 10 PM CDT THIS EVENING FOR
THE FOLLOWING AREAS

IN WISCONSIN THIS WATCH INCLUDES 5 COUNTIES

IN SOUTHEAST WISCONSIN

KENOSHA               MILWAUKEE             RACINE
WALWORTH              WAUKESHA

THIS INCLUDES THE CITIES OF BROOKFIELD, DELAVAN, EAST TROY,
ELKHORN, KENOSHA, LAKE GENEVA, MENOMONEE FALLS, MILWAUKEE,
MUSKEGO, NEW BERLIN, RACINE, WAUKESHA, AND WHITEWATER.

Tornado Watch
Issued: 1:39 AM Apr. 15, 2026 – National Weather Service
TORNADO WATCH 109 REMAINS VALID UNTIL 10 PM CDT THIS EVENING FOR
THE FOLLOWING AREAS

THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS

NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
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

Special Marine Warning
Issued: 1:02 AM Apr. 15, 2026 – National Weather Service
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 915 PM CDT...

For the following areas...
Lake Michigan nearshore and open waters to mid lake from Sheboygan WI
to Wind Point WI...

At 801 PM CDT, strong thunderstorms were located along a line
extending from 20 nm southeast of Oostburg to 27 nm east of Port
Washington to 22 nm east of North Pt. Lt., moving east at 25 knots.

HAZARD...Wind gusts to nearly 50 knots and small hail.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.

Locations impacted include...
Port Washington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Wisconsin...and the adjacent waters of Lake Michigan.

Move to safe harbor until hazardous weather passes.

&&


HAIL...<.75IN;
WIND...49KTS

Special Marine Warning
Issued: 1:00 AM Apr. 15, 2026 – National Weather Service
The National Weather Service in Milwaukee/Sullivan has issued a

* Special Marine Warning for...
Lake Michigan nearshore and open waters to mid lake from North
Point Light WI to Winthrop Harbor IL...

* Until 1000 PM CDT.

* At 800 PM CDT, strong thunderstorms were located along a line
extending from 33 nm southwest of White Lake Pier Heads to 27 nm
northeast of Wind Pt. to near Cudahy to 24 nm west of Milwaukee to
39 nm northwest of McHenry, moving east at 35 knots.

HAZARD...Wind gusts to 40 knots and small hail.

SOURCE...Radar.

IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.

* Strong thunderstorms will remain over mainly open waters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Wisconsin...and the adjacent waters of Lake Michigan.

Move to safe harbor until hazardous weather passes.

&&


HAIL...<.75IN;
WIND...40KTS

Flash Flood Warning
Issued: 12:58 AM Apr. 15, 2026 – National Weather Service
The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Warning for...
Northern Milwaukee County in southeastern Wisconsin...
Northeastern Waukesha County in southeastern Wisconsin...

* Until 1100 PM CDT.

* At 758 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Milwaukee, Waukesha, West Allis, Wauwatosa, New Berlin,
Brookfield, Menomonee Falls, Whitefish Bay, Pewaukee, Brown Deer,
Sussex, St. Francis, Fox Point, Elm Grove, Bayside, West
Milwaukee, Glendale, Butler, River Hills and Lannon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&


FLASH FLOOD...RADAR INDICATED

Flash Flood Warning
Issued: 12:10 AM Apr. 15, 2026 – National Weather Service
The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Warning for...
Southeastern Dodge County in southeastern Wisconsin...
Northwestern Milwaukee County in southeastern Wisconsin...
Southwestern Ozaukee County in southeastern Wisconsin...
Southern Washington County in southeastern Wisconsin...
Northern Waukesha County in southeastern Wisconsin...

* Until 1015 PM CDT.

* At 710 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Northern Milwaukee, Brookfield, Menomonee Falls, Mequon, Hartford,
Pewaukee, Brown Deer, Grafton, Cedarburg, Sussex, Hartland,
Delafield, Jackson, Slinger, Bayside, Thiensville, Germantown,
Okauchee Lake, Glendale and Oconomowoc.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&


FLASH FLOOD...RADAR INDICATED

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