Alert archive / Wisconsin / Flash Flood Warnings in 2025
Flash Flood Warning 10, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood warning at Aug 9, 2025, 8:04 PM CDT for Milwaukee County, Waukesha County, Wisconsin. It was in force for 6 hr. 18 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 9, 2025, 8:04 PM CDT (01:04 UTC)
- Expired
- Aug 10, 2025, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Milwaukee County, WI, Waukesha County, WI
The radar
The Milwaukee radar (KMKX), 53 km from the middle of the area, began a volume at 01:05 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 9, 8:52 PM CDT | FLASH FLOOD | 1 Ne West Allis, WI | Water reported up to the bottom of car doors. |
| Aug 9, 9:30 PM CDT | RAIN 3.4 | 1 N Greenfield, WI | Delayed Report: From 7pm to 9:30pm, measured 3.40 inches with gauge. Trained Spotter. |
| Aug 9, 11:30 PM CDT | RAIN 3.93 | 2 W Milwaukee, WI | Trained spotter reports daily total of 3.93 inches near 27th and Highland BLVD in Milwaukee, measured 11:30 PM. |
| Aug 9, 11:50 PM CDT | RAIN 3.92 | 4 Nw Milwaukee, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 4.28 | 3 S Milwaukee, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 4.38 | 1 Sse Milwaukee, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 4.83 | 2 Nne Brookfield, WI | |
| Aug 9, 11:50 PM CDT | RAIN 4.84 | 1 W Hales Corners, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 4.98 | 2 Nne West Allis, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 5.14 | 1 Se Elm Grove, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 5.21 | 1 Ssw Glendale, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 5.86 | 1 N Glendale, WI | MMSD Gauge between Fox Point and Glendale. Daily total measurement, taken 1150 PM. |
| Aug 9, 11:50 PM CDT | RAIN 5.99 | 2 Ssw West Allis, WI | MMSD Gauge. Daily total measurement, taken 1150 PM. |
| Aug 10, 12:00 AM CDT | RAIN 5.77 | New Berlin, WI | New Berlin Wisconet site storm total. |
| Aug 10, 12:07 AM CDT | FLASH FLOOD | 2 Sw Wauwatosa, WI | Flooding at 113th St and Watertown Plank Rd Wauwatosa, photos on X depict cars stalled / stranded / abandoned in flooded roadways. |
| Aug 10, 12:19 AM CDT | FLASH FLOOD | New Berlin, WI | Lots of street flooding in New Berlin area with cars stuck in the water. |
| Aug 10, 1:10 AM CDT | FLASH FLOOD | 2 Se New Berlin, WI | Numerous local news channels with footage of flooded roadways near I-43 and Moorland Rd intersection. Reports of stranded vehicles across the area. |
| Aug 10, 2:09 AM CDT | RAIN 10.16 | 3 N Butler, WI |
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 4 storm reports to this flash flood warning; the first came 48 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, 1.1 hours before the alert went out and 165 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.
- Mixed-layer CAPE
- 42 J/kg
- Mixed-layer CIN
- -349 J/kg
- Mixed-layer LCL
- 1159 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
000
WGUS53 KMKX 100104
FFWMKX
WIC079-133-100700-
/O.NEW.KMKX.FF.W.0010.250810T0104Z-250810T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Milwaukee/Sullivan WI
804 PM CDT Sat Aug 9 2025
The National Weather Service in Milwaukee/Sullivan has issued a
* Flash Flood Warning for...
Milwaukee County in southeastern Wisconsin...
Eastern Waukesha County in southeastern Wisconsin...
* Until 200 AM CDT.
* At 804 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 inches of
rain have fallen. The expected rainfall rate is 1 to 2 inches per
hour. 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, West Allis, Wauwatosa, New Berlin, Brookfield,
Greenfield, Menomonee Falls, Oak Creek, Muskego, South Milwaukee,
Cudahy, Whitefish Bay, Greendale, Brown Deer, St. Francis, Hales
Corners, Fox Point, Elm Grove, West Milwaukee and Franklin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4315 8789 4313 8790 4307 8786 4305 8788
4304 8790 4303 8790 4300 8789 4298 8786
4296 8785 4293 8785 4291 8784 4289 8785
4288 8785 4284 8783 4284 8815 4316 8814
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
BOXELL3 follow-up statements
069
WGUS73 KMKX 100212
FFSMKX
Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
912 PM CDT Sat Aug 9 2025
WIC079-133-100700-
/O.CON.KMKX.FF.W.0010.000000T0000Z-250810T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Milwaukee WI-Waukesha WI-
912 PM CDT Sat Aug 9 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 AM CDT SUNDAY FOR
MILWAUKEE AND EASTERN WAUKESHA COUNTIES...
At 912 PM CDT, local law enforcement reported thunderstorms
producing heavy rain and flooding of some roadways in central
Milwaukee County. The two right lanes on Wisconsin 175 North at I-94
are closed. Between 2 and 3.5 inches of rain have fallen. Additional
rainfall amounts of 1 to 2 inches are possible in the warned area.
Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Milwaukee, West Allis, Wauwatosa, New Berlin, Brookfield,
Greenfield, Menomonee Falls, Oak Creek, Muskego, South Milwaukee,
Cudahy, Whitefish Bay, Greendale, Brown Deer, St. Francis, Hales
Corners, Fox Point, Elm Grove, West Milwaukee and Franklin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4315 8789 4313 8790 4307 8786 4305 8788
4304 8790 4303 8790 4300 8789 4298 8786
4296 8785 4293 8785 4291 8784 4289 8785
4288 8785 4284 8783 4284 8815 4316 8814
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
GEHRING405
WGUS73 KMKX 100328
FFSMKX
Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
1028 PM CDT Sat Aug 9 2025
WIC079-133-100700-
/O.CON.KMKX.FF.W.0010.000000T0000Z-250810T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Milwaukee WI-Waukesha WI-
1028 PM CDT Sat Aug 9 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 AM CDT SUNDAY FOR
MILWAUKEE AND EASTERN WAUKESHA COUNTIES...
At 1028 PM CDT, Doppler radar, automated rain gauges, and DOT
cameras indicated thunderstorms producing heavy rain. Street
flooding and significant ponding of water on some roadways in
northern and central Milwaukee County. Between 2 and 4 inches of
rain have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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, West Allis, Wauwatosa, New Berlin, Brookfield,
Greenfield, Menomonee Falls, Oak Creek, Muskego, South Milwaukee,
Cudahy, Whitefish Bay, Greendale, Brown Deer, St. Francis, Hales
Corners, Fox Point, Elm Grove, West Milwaukee and Franklin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4315 8789 4313 8790 4307 8786 4305 8788
4304 8790 4303 8790 4300 8789 4298 8786
4296 8785 4293 8785 4291 8784 4289 8785
4288 8785 4284 8783 4284 8815 4316 8814
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
GEHRING038
WGUS73 KMKX 100526
FFSMKX
Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
1226 AM CDT Sun Aug 10 2025
WIC079-133-100700-
/O.CON.KMKX.FF.W.0010.000000T0000Z-250810T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Milwaukee WI-Waukesha WI-
1226 AM CDT Sun Aug 10 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 AM CDT EARLY THIS
MORNING FOR MILWAUKEE AND EASTERN WAUKESHA COUNTIES...
At 1226 AM CDT, Doppler radar and local law enforcement reported
thunderstorms producing heavy rain. Street flooding and basement
flooding over eastern Waukesha County into Milwaukee County
continues. Some vehicles stranded in New Berlin. Between 3 and 5
inches of rain have fallen. Additional rainfall amounts of 1 to 2
inches are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Milwaukee, West Allis, Wauwatosa, New Berlin, Brookfield,
Greenfield, Menomonee Falls, Oak Creek, Muskego, South Milwaukee,
Cudahy, Whitefish Bay, Greendale, Brown Deer, St. Francis, Hales
Corners, Fox Point, Elm Grove, West Milwaukee and Franklin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4315 8789 4313 8790 4307 8786 4305 8788
4304 8790 4303 8790 4300 8789 4298 8786
4296 8785 4293 8785 4291 8784 4289 8785
4288 8785 4284 8783 4284 8815 4316 8814
FLASH FLOOD...OBSERVED
$$
GEHRINGWhat forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Aug 9, 3:01 PM CDT, 5 hours 3 minutes earlier. Its key messages:
- Showers and storms expected across the area this afternoon/evening, with additional development possible after midnight. A few storms could be strong with damaging winds through this evening, with torrential downpours accompanying all storms.
- Additional periods of storms expected Sunday afternoon into Monday, posing additional heavy rainfall potential. A Flood Watch remains in effect through 7 AM Monday morning for areas northwest of Milwaukee.
- Hot and humid through the rest of this afternoon, with heat indices in the upper 90s to near 100 over southeast Wisconsin.
- High swimming risk continues into this evening at all Lake Michigan beaches.&&
Area forecast discussion, Aug 9, 3:01 PM CDT, 5 hours 3 minutes before
Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
301 PM CDT Sat Aug 9 2025
.KEY MESSAGES...
- Showers and storms expected across the area this
afternoon/evening, with additional development possible after
midnight. A few storms could be strong with damaging winds through
this evening, with torrential downpours accompanying all storms.
- Additional periods of storms expected Sunday afternoon into
Monday, posing additional heavy rainfall potential. A Flood Watch
remains in effect through 7 AM Monday morning for areas northwest of
Milwaukee.
- Hot and humid through the rest of this afternoon, with heat
indices in the upper 90s to near 100 over southeast Wisconsin.
- High swimming risk continues into this evening at all Lake
Michigan beaches.&&
.SHORT TERM...
Issued 300 PM CDT Sat Aug 9 2025
Tonight through Sunday night:
Synopsis/Mesoanalysis: A weak surface boundary is working into
southern Wisconsin this afternoon, encouraging shower and storm
development from the Madison metro north into the Fox River Valley.
Lift from the surface boundary is being further supported by subtle
MCV extending from central Wisconsin into the Wisconsin River
Valley, with an additional MCV apparent over the Waterloo, IA
vicinity. Expect shower and storm activity to continue sagging south
and east with the surface boundary through the remainder of the
afternoon, with additional storm development anticipated this
evening as the Waterloo MCV tracks into southern Wisconsin. An
isolated strong to severe storm is possible in this activity, with
damaging winds being the primary concern. A brief lull may follow
the evening activity, with additional storm development anticipated
after midnight as the low level jet ramps up. Torrential downpours
will be possible in this evening's & overnight's storms, which could
lead to hydro impacts across the area, with the greatest potential
for impacts (particularly any flash flooding) in areas experiencing
multiple rounds of storms. Additional storm development is
anticipated Sunday afternoon into Monday morning, with development
corridors being highly dependent on MCV's & where the progressing
surface boundary settles following tonight's convection. Additional
torrential downpours and flooding potential will exist in these
storms, with potential once more being maximized in areas of
training. A Flood Watch remains in effect through 7 AM Monday to the
northwest of the Milwaukee metro, where training potential will be
greatest.
Rest Of This Afternoon & Tonight: Heat and humidity will continue,
with heat indices in the upper 90s over southeastern Wisconsin. A
few spots will briefly climb to the 100 degree mark over this part
of the area. A high swimming risk continues through the first part
of this evening at Ozaukee and Sheboygan County beaches, with a
moderate swimming risk further south. Exercise extreme caution if
heading lakeside through this evening.
Quigley
&&
.LONG TERM...
Issued 300 PM CDT Sat Aug 9 2025
Monday through Saturday:
Synopsis: The surface boundary at the center of the short term's
shower and storm chances will linger across southern Wisconsin
during the Monday-Tuesday timeframe, supporting additional periods
of showers and thunderstorms. Much like in the short term period,
weak wind shear should keep severe potential lower in any Monday-
Tuesday activity, though a still very humid air mass will support
additional torrential downpour potential (particularly on Monday).
Additional hydrologic impacts are thus possible in early week
thunderstorms, particularly in regions experiencing repeated rounds
of heavy rainfall. What's left of the surface boundary will push
east of the region Tuesday night, resulting in a brief period of
west-northwest winds & slightly less humid conditions through
Wednesday. The briefly lower humidity will be short-lived, as re-
establishing south-southeasterly winds will push dew points upward
Wednesday night through Saturday. Additional periods of showers and
storms return to the forecast during this time period as
temperatures gradually trend upward.
Monday through Tuesday: With a surface boundary still draped across
the area, additional periods of showers and embedded storms are
forecast. Chances for storms are overall higher Monday relative to
Tuesday (~40-60% Monday compared to ~15-30% Tuesday), with activity
expected to shutdown entirely by Tuesday night as the responsible
boundary pushes east of the region. Shear will remain weak through
the entirety of this time frame, making severe potential overall low
in any storm development. Still elevated humidity & precipitable
waters pooled along the surface boundary, however, will support the
continued possibility for heavy downpours. Could thus continue to
see more minor hydro impacts (urban/small stream flooding, small
rises on area rivers/creeks) through Tuesday afternoon. Have
maintained the 12Z Monday end time of the Flood Watch in this
forecast, but will continue to monitor trends in the coming
updates.
Quigley
&&
.AVIATION...
Issued 300 PM CDT Sat Aug 9 2025
VFR conditions continue into this afternoon at all southern
Wisconsin terminals. Already reflected in current observations,
southerly winds will become gusty through early evening. SHRA and
TSRA development remains likely this afternoon and evening as a
surface front slowly sags into southern Wisconsin. Have continued
prevailing mentions at all terminals in the 15Z update, and will
continue to monitor timing trends. Precip will be accompanied by
reduced VIS readings, which will result in temporary reductions in
flight categories. Periods of SHRA & TSRA will continue into the
overnight hours, with CIGs gradually lowering approaching daybreak
on Sunday.
Quigley
&&
.MARINE...
Issued 300 PM CDT Sat Aug 9 2025
1002 mb low pressure will linger across Manitoba into this evening,
with 1024 mb high pressure remaining centered over the Mid-Atlantic
states. Placed between the two surface features, breezy southerly
winds will continue across the open waters through the first half of
tonight. Prevailing southerlies will gradually decrease after
midnight as the aforementioned surface high migrates east into the
Atlantic Ocean. Generally southerly winds will continue into the day
on Sunday as a weak surface front moves into western Wisconsin,
ultimately stopping short of the open waters. Periods of showers and
storms are forecast this evening through Sunday night. Widespread
severe weather is not expected, though a few storms could produce
brief gusty winds. Winds will trend south to southwesterly during
the day Monday as 1002 mb low pressure moves into the Hudson Bay.
Breezy southerly winds will continue in nearshore zones through the
rest of this afternoon, with widespread 22-25 knot gusts
anticipated. The gusts will be accompanied by elevated wave heights,
particularly from Port Washington and points north. Gusts and wave
heights will gradually taper from south to north through this
evening, with decreasing trends continuing after midnight. A Small
Craft Advisory thus remains in effect until 7 PM CDT from Port
Washington south to Winthrop Harbor, and until 10 PM CDT from Port
Washington to Sheboygan. Periods of showers and thunderstorms are
forecast this evening through early Monday morning. A few storms
could produce gusty winds, particularly this evening.
Quigley
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Beach Hazards Statement...WIZ052-WIZ060 until 10 PM Saturday.
Flood Watch...WIZ046-WIZ047-WIZ051-WIZ052-WIZ056-WIZ057-WIZ058-
WIZ059-WIZ062-WIZ063-WIZ064-WIZ067-WIZ068-WIZ069 until 7
AM Monday.
LM...Small Craft Advisory...LMZ643 until 10 PM Saturday.
Small Craft Advisory...LMZ644-LMZ645-LMZ646 until 7 PM
Saturday.
&&
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www.youtube.com/NWSMilwaukeeHazardous weather outlook, Aug 9, 7:52 PM CDT, 12 minutes before
Hazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 752 PM CDT Sat Aug 9 2025 WIZ046-047-051-052-056>060-062>072-110100- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 752 PM CDT Sat Aug 9 2025 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Tonight A Flood Watch is in effect for the potential for flash flooding across all of southern Wisconsin into Monday morning. Multiple rounds of thunderstorms with heavy rain are forecast. .DAYS TWO THROUGH SEVEN...Sunday through Saturday A Flood Watch will remain in effect for the potential for flash flooding across all of southern Wisconsin into Monday morning. Multiple rounds of thunderstorms with heavy rain are forecast. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. LMZ643>646-110100- 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- 752 PM CDT Sat Aug 9 2025 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Tonight Numerous thunderstorms with frequent lightning and heavy rain. .DAYS TWO THROUGH SEVEN...Sunday through Saturday Thunderstorm chances linger into next week. LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-110100- 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- 752 PM CDT Sat Aug 9 2025 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Tonight Numerous thunderstorms with frequent lightning and heavy rain over the south half. .DAYS TWO THROUGH SEVEN...Sunday through Saturday Thunderstorm chances linger into next week. www.weather.gov/mkx
In the hours before
Special weather statement, Aug 9, 2:46 PM CDT, 5 hours 18 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
246 PM CDT Sat Aug 9 2025
WIZ058-092030-
Dodge WI-
246 PM CDT Sat Aug 9 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN DODGE COUNTY
THROUGH 330 PM CDT...
At 246 PM CDT, Doppler radar was tracking a strong thunderstorm near
Fall River, or near Columbus, moving northeast at 20 mph.
HAZARD...Wind gusts of 50 to 55 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...
Beaver Dam, Waupun, Columbus, Lomira, Burnett, Fox Lake, Brownsville,
Danville, South Beaver Dam, Atwater, Astico, and Leipsig.
This includes U.S. Highway 151 between mile markers 120 and 146.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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 4327 8901 4345 8901 4363 8897 4363 8844
TIME...MOT...LOC 1946Z 221DEG 17KT 4339 8896
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
BOXELLSpecial weather statement, Aug 9, 3:06 PM CDT, 4 hours 58 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
306 PM CDT Sat Aug 9 2025
WIZ051-052-058-059-063>065-092030-
Dodge WI-Waukesha WI-Sheboygan WI-Washington WI-Fond Du Lac WI-
Jefferson WI-Dane WI-
306 PM CDT Sat Aug 9 2025
...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN FOND DU LAC...
NORTHWESTERN WAUKESHA...SOUTHEASTERN DANE...WASHINGTON...JEFFERSON...
EASTERN DODGE AND SOUTHWESTERN SHEBOYGAN COUNTIES THROUGH 330 PM
CDT...
At 304 PM CDT, Doppler radar was tracking strong thunderstorms
developing along a line extending from near Theresa to near
Stoughton. This line of development is moving southeast at 25 mph.
Once storms develop individual storms will move to the northeast.
HAZARD...Wind gusts up to 50 mph and half inch 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, Watertown, Hartford, Stoughton, Fort Atkinson, Jefferson,
Lake Mills, Edgerton, Mayville, Slinger, Kewaskum, Horicon, Waterloo,
Juneau, Okauchee Lake, Oconomowoc, Johnson Creek, Lomira, Deerfield,
and Campbellsport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4364 8788 4354 8799 4354 8804 4350 8804
4284 8879 4285 8934 4365 8846
TIME...MOT...LOC 2004Z 286DEG 22KT 4352 8838 4295 8921
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
BOXELLSpecial weather statement, Aug 9, 3:41 PM CDT, 4 hours 23 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
341 PM CDT Sat Aug 9 2025
WIZ051-052-058>060-063>066-092145-
Dodge WI-Waukesha WI-Milwaukee WI-Sheboygan WI-Washington WI-
Ozaukee WI-Fond Du Lac WI-Jefferson WI-Dane WI-
341 PM CDT Sat Aug 9 2025
...STRONG THUNDERSTORMS WILL IMPACT OZAUKEE...SOUTHEASTERN FOND DU
LAC...NORTHWESTERN MILWAUKEE...NORTHERN WAUKESHA...EASTERN DANE...
WASHINGTON...NORTHERN JEFFERSON...EASTERN DODGE AND SHEBOYGAN
COUNTIES THROUGH 445 PM CDT...
At 339 PM CDT, Doppler radar was tracking a large area of strong
thunderstorms along a line extending from near Elkhart Lake to near
Lake Mills. Movement of this line was east at 30 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Northern Milwaukee, Sheboygan, Wauwatosa, Brookfield, Menomonee
Falls, West Bend, Watertown, Mequon, Hartford, Whitefish Bay,
Pewaukee, Brown Deer, Grafton, Cedarburg, Port Washington, Sussex,
Hartland, Plymouth, Sheboygan Falls, and Delafield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4356 8779 4346 8780 4337 8788 4326 8791
4318 8788 4314 8790 4310 8789 4311 8909
4389 8815 4389 8773 4381 8773 4376 8770
4374 8771 4370 8770
TIME...MOT...LOC 2039Z 252DEG 27KT 4387 8793 4307 8886
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
BOXELLSpecial weather statement, Aug 9, 4:44 PM CDT, 3 hours 20 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
444 PM CDT Sat Aug 9 2025
WIZ052-059-060-065-066-092215-
Waukesha WI-Milwaukee WI-Sheboygan WI-Washington WI-Ozaukee WI-
444 PM CDT Sat Aug 9 2025
...STRONG THUNDERSTORMS WILL IMPACT OZAUKEE...NORTHERN MILWAUKEE...
NORTHERN WAUKESHA...SOUTHEASTERN WASHINGTON AND SOUTHEASTERN
SHEBOYGAN COUNTIES THROUGH 515 PM CDT...
At 444 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from 9 miles east of Sheboygan
to Lisbon. Movement was east at 25 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Northern Milwaukee, Sheboygan, Wauwatosa, Brookfield, Menomonee
Falls, Mequon, Whitefish Bay, Pewaukee, Brown Deer, Grafton,
Cedarburg, Port Washington, Sussex, Hartland, Delafield, Jackson, Fox
Point, Saukville, Bayside, and Thiensville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4368 8770 4357 8779 4349 8779 4338 8787
4326 8791 4318 8788 4312 8790 4310 8788
4310 8844 4373 8771
TIME...MOT...LOC 2144Z 255DEG 24KT 4376 8755 4314 8825
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
BOXELLLocal storm report, Aug 9, 5:12 PM CDT, 2 hours 52 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
512 PM CDT Sat Aug 9 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Tstm Wnd Dmg Menomonee Falls 43.18N 88.12W
08/09/2025 Waukesha WI Law Enforcement
Menomonee Falls PD reports multiple large
branches and a few 7 to 8 inch diameter
trees down, with at least one of those
toppling some power lines.
&&
BHSSpecial weather statement, Aug 9, 6:32 PM CDT, 1 hour 32 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
632 PM CDT Sat Aug 9 2025
WIZ060-066-092345-
Milwaukee WI-Ozaukee WI-
632 PM CDT Sat Aug 9 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL OZAUKEE AND
NORTHWESTERN MILWAUKEE COUNTIES THROUGH 645 PM CDT...
At 631 PM CDT, Doppler radar was tracking a strong thunderstorm over
northern Milwaukee, moving northeast at 35 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Northern Milwaukee, Mequon, Whitefish Bay, Brown Deer, Fox Point,
Bayside, Glendale, and River Hills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4315 8789 4314 8790 4312 8790 4309 8795
4312 8807 4318 8806 4324 8791 4321 8790
4319 8790 4318 8788
TIME...MOT...LOC 2331Z 225DEG 31KT 4315 8796
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
BOXELLThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 10:23 PM CDT | Special Weather Statement | MKX | Jefferson | 52 min |
| Aug 9, 11:14 PM CDT | Flash Flood Warning | MKX | Waukesha | 4 hr |
| Aug 9, 11:29 PM CDT | Areal Flood Advisory | MKX | Waukesha | 3 hr |
| Aug 10, 12:02 AM CDT | Areal Flood Advisory | MKX | Dodge, Milwaukee, Ozaukee, Washington, Waukesha | 3 hr |
| Aug 10, 1:07 AM CDT | Flash Flood Warning | MKX | Milwaukee, Waukesha | 4 hr |
| Aug 10, 1:17 AM CDT | River Flood Warning | MKX | Waukesha | 7 days |
| Aug 10, 1:18 AM CDT | River Flood Warning | MKX | Milwaukee | 21 days |
| Aug 10, 1:38 AM CDT | Flash Flood Warning | MKX | Ozaukee, Washington | 4 hr |
| Aug 10, 2:03 AM CDT | River Flood Warning | MKX | Milwaukee | 21 days |
| Aug 10, 2:05 AM CDT | River Flood Warning | MKX | Milwaukee | 21 days |
| Aug 10, 2:38 AM CDT | River Flood Warning | MKX | Waukesha | 4 hr |
| Aug 10, 2:44 AM CDT | River Flood Warning | MKX | Milwaukee | 3 hr |
| Aug 10, 3:32 AM CDT | Areal Flood Advisory | MKX | Dodge, Ozaukee, Washington | 3 hr |
| Aug 10, 5:02 AM CDT | Areal Flood Warning | MKX | Milwaukee, Waukesha | 14 hr |
| Aug 10, 5:16 AM CDT | Flash Flood Warning | MKX | Ozaukee, Washington | 3 hr |
| Aug 10, 5:27 AM CDT | River Flood Warning | MKX | Milwaukee | 47 hr |
| Aug 10, 6:52 AM CDT | Areal Flood Advisory | MKX | Dane | 3 hr |
| Aug 10, 7:59 AM CDT | Flash Flood Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 3 hr |
| Aug 10, 8:55 AM CDT | Flash Flood Warning | MKX | Dodge, Washington, Waukesha | 3 hr |
| Aug 10, 9:20 AM CDT | Areal Flood Warning | MKX | Ozaukee, Washington | 10 hr |
| Aug 10, 11:03 AM CDT | Areal Flood Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 8 hr |
| Aug 10, 11:42 AM CDT | River Flood Warning | MKX | Ozaukee | 4 days |
| Aug 10, 11:42 AM CDT | River Flood Warning | MKX | Ozaukee | 4 days |
| Aug 10, 11:49 AM CDT | Areal Flood Warning | MKX | Dodge, Washington, Waukesha | 7 hr |
| Aug 10, 2:53 PM CDT | Marine Dense Fog Advisory | MKX | 6 hr | |
| Aug 10, 5:36 PM CDT | Areal Flood Warning | MKX | Dodge, Jefferson, Milwaukee, Ozaukee, Racine, Washington and 1 more | 16 hr |
Nearby
Flash Flood Warnings in Wisconsin, 2025Every flash flood warning in 2025
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.