Severe Thunderstorm Warning 39, NWS Milwaukee, WI

324 
WWUS53 KMKX 142158
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
458 PM CDT Tue Apr 14 2026

WIC021-025-027-142245-
/O.CON.KMKX.SV.W.0039.000000T0000Z-260414T2245Z/
Columbia WI-Dane WI-Dodge WI-
458 PM CDT Tue Apr 14 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN COLUMBIA...NORTHEASTERN DANE AND WEST CENTRAL DODGE
COUNTIES...

At 457 PM CDT, a severe thunderstorm was located near Waunakee, and
is nearly stationary.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Trained weather spotters near Middleton report golf ball 
         sized hail.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Madison, Sun Prairie, Middleton, Waunakee, McFarland, Monona,
Windsor, Columbus, Cottage Grove, Fall River, Shorewood Hills, Maple
Bluff, Deansville, East Bristol, Camp Randall Stadium, Danville,
Henry Vilas Zoo, Token Creek, and UW-Madison.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for south central
and southeastern Wisconsin.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4306 8964 4333 8910 4341 8900 4337 8883
      4303 8930
TIME...MOT...LOC 2157Z 238DEG 34KT 4314 8943 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PATTERSON

835 
WWUS53 KMKX 142201
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
501 PM CDT Tue Apr 14 2026

WIC021-025-027-142245-
/O.CON.KMKX.SV.W.0039.000000T0000Z-260414T2245Z/
Columbia WI-Dane WI-Dodge WI-
501 PM CDT Tue Apr 14 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN COLUMBIA...NORTHEASTERN DANE AND WEST CENTRAL DODGE
COUNTIES...

At 501 PM CDT, a severe thunderstorm was located near Waunakee,
moving northeast at 40 mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters reports 2.5 inch hail near 
         Middleton.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Madison, Sun Prairie, Middleton, Waunakee, McFarland, Monona,
Windsor, Columbus, Cottage Grove, Fall River, Shorewood Hills, Maple
Bluff, Deansville, East Bristol, Camp Randall Stadium, Danville,
Henry Vilas Zoo, Token Creek, and UW-Madison.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for south central
and southeastern Wisconsin.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4308 8959 4333 8910 4341 8900 4337 8883
      4303 8930
TIME...MOT...LOC 2201Z 238DEG 34KT 4314 8943 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PATTERSON

127 
WWUS53 KMKX 142214
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
514 PM CDT Tue Apr 14 2026

WIC021-025-027-142245-
/O.CON.KMKX.SV.W.0039.000000T0000Z-260414T2245Z/
Columbia WI-Dane WI-Dodge WI-
514 PM CDT Tue Apr 14 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN COLUMBIA...NORTHEASTERN DANE AND WEST CENTRAL DODGE
COUNTIES...

At 514 PM CDT, a severe thunderstorm was located near Windsor, moving
northeast at 25 mph.

THIS IS A DESTRUCTIVE STORM.

HAZARD...Baseball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be severely injured. 
         Expect shattered windows, extensive damage to roofs, 
         siding, and vehicles.

Locations impacted include...
Madison, Sun Prairie, Middleton, Waunakee, McFarland, Monona,
Windsor, Columbus, Cottage Grove, Fall River, Shorewood Hills, Maple
Bluff, Deansville, East Bristol, Camp Randall Stadium, Danville,
Henry Vilas Zoo, Token Creek, and UW-Madison.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for south central
and southeastern Wisconsin.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4341 8900 4337 8883 4303 8930 4304 8933
      4308 8959 4333 8910
TIME...MOT...LOC 2214Z 243DEG 23KT 4316 8933 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DDV

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
313 PM CDT Tue Apr 14 2026

.KEY MESSAGES...

- Significant severe weather event remains forecast this
  afternoon & evening (peak intensity 3-10 PM). All severe
  weather hazards, including very large hail greater than golf
  ball size and tornadoes, are possible. Seek immediate shelter
  if a warning is issued for your area later today.

- Additional severe storms possible Wednesday afternoon if a
  front remains stalled across the area. If the front sets up
  south of the area, severe potential will greatly decrease but
  flash flooding will remain possible due to training
  convection.

- Heavy rainfall could lead to additional periods of flooding
  this afternoon into Wednesday. Additional Flood Watches are
  possible especially tomorrow.

- Additional windows for heavy rainfall, flooding, and severe
  thunderstorms Friday into Saturday. All severe hazards will
  be possible later Tuesday afternoon into the evening.

&&

.SHORT TERM...
Issued 309 PM CDT Tue Apr 14 2026

Tonight through Wednesday night:

Storms have begun to fire this afternoon over central to NW
Iowa. This corroborates a westward shift in initiation trends in
recent runs of the HRRR model. Current runs of the WoFS support
two main areas of storms this afternoon with a cluster of
storms over central WI through Sauk, Columbia, Green Lake, and
Marquette Counties that will then track east to the lakeshore
and a cluster that will move through southwest Wisconsin and
east to the lake. These storms are projected to be supercells
when they enter our area but may cluster into a line with
eastward extent

An 18z sounding from Davenport supports a very unstable
environment supportive of 4000 J/kg held by a cap at 800mb. With
the cap eroding to our west, explosive supercell development is
expected, leading to the corridors of storms in southern WI
mentioned in the previous paragraph. All hazards will be
possible during the supercell mode, as mid level lapse rates ~8
C/km and hodograph curvature will support large hail, and
curvature in the low levels of the hodographs and 3CAPE >150J/kg
will support 0-1 km SRH >200 m2/s2 and low level stretching for
tornado formation. As we head into the evening, there may be
some potential for these storms to become linear, leading to a
damaging wind and QLCS tornado threat, especially as the LLJ
increases near sunset and lengthens the low level hodographs.
Todays severe weather hazards are expected to be high end and
should not be taken lightly. Have multiple ways to receive
warnings.

Storms are largely expected to be out of the area after 10PM,
and may push a surface boundary through our area. If this
happens, storms tomorrow will be less severe though flash
flooding will still be a threat. Runs of the CAMs depict a west
to east oriented line of storms that may set up along the WI/IL
border during the late afternoon into the evening, capable of
heavy rain. The wind, hail, and tornado threat with the storms
tomorrow will be far less than today.

CMiller

&&

.LONG TERM...
Issued 245 PM CDT Tue Apr 14 2026

Thursday through Tuesday:

A shortwave trough will track across southern WI Thursday morning.
Scattered showers and a few thunderstorms are expected with this
feature, especially in the morning with deeper moisture still in
place over the region. The chance for showers and thunderstorms
will linger into the afternoon. As the deeper moisture departs
during this time and we heat up, the low level lapse rates will
increase to allow for instability (up to 1000 j/kg) to develop. A
lake breeze should push inland and help to trigger some of the
showers/storms. Look for the precip chances to exit by sunset.

High pressure will pass through Thursday night and lows will dip
into the 40s wherever the lake breeze hit, so bisecting southern
WI from east to west. Friday morning and early afternoon look
quiet, but we will be getting primed for the next system to arrive
Friday late afternoon and night.

Low pressure tracking across the northern Plains on Friday, in
response to a high-amplitude upper trough, will cross Lake
Superior Friday night. A strong cold front will slide across WI
from west to east late Friday night through Saturday morning.
Showers are thunderstorms are expected within the warm sector
Friday afternoon/evening and also along the cold front. Scattered
showers are possible behind the front during the day Saturday.
Strong cold air advection will follow, so low temps should dip
down to around or below freezing Saturday night on brisk westerly
winds. The models dry out the atmosphere quickly, but if there
happens to be any lingering moisture, the precip type would chance
to flurries/snow.

Brisk westerly winds will persist through Sunday. Finally, high
pressure will dominate and give us dry weather through Monday or
Tuesday. The weather pattern has a large degree of uncertainty
beyond Monday between the models.

Cronce

&&

.AVIATION...
Issued 236 PM CDT Tue Apr 14 2026

Severe storms are expected this evening across all of southern
Wisconsin. These storms will be capable of all severe weather
hazards. The storms should track from west to east across the
area between 21Z and 03Z tonight. Higher surface moisture has
supported low VFR to high MVFR BKN to SCT conditions and those
cigs should largely continue into tonight. Ambient, background
flow should be southerly to southwesterly with breezes from 15
to 20 knots. After storms move through tonight, winds should
briefly become light and variable for a time before southerly
winds return. Fog may also form over south central WI.

CMiller

&&

.MARINE...
Issued 245 PM CDT Tue Apr 14 2026

A stationary front will remain parked over the middle third of
the lake into tomorrow, slowly sinking south to the southern end
of the lake by Thursday morning. Winds will remain southerly
south of the front and modestly breezy, while winds north of the
front will remain light and variable to northerly during this
time. Today, severe storms are expected over the southern half
to southern two thirds of the lake. Hail and gusty winds will be
possible and waterspouts may occur with any tornadic storms from
land that move over the waters. This will be most likely near
the shoreline of Wisconsin and Illinois.

The front will clear the lake as a cold front Friday, before
low pressure of 29.6 inches approaches from the west.

CMiller

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...Dense Fog Advisory...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
     LMZ567-LMZ643-LMZ644-LMZ669-LMZ671-LMZ868-LMZ870-LMZ872
     until 7 AM Wednesday.

&&

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Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
306 PM CDT Tue Apr 14 2026

WIZ046-047-051-052-056>060-062>072-152015-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
306 PM CDT Tue Apr 14 2026

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

.DAY ONE...Tonight

Several significant severe storms are expected through late
evening. All severe weather hazards, including very large hail
greater than golf ball size and a few tornadoes, are possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

Additional severe thunderstorms are possible Wednesday afternoon
and evening. Heavy rain may produce flooding. Keep up with the
latest forecast updates.

There is a chance of thunderstorms Thursday. Another round of
thunderstorms is forecast Friday night into Saturday. Some of
these storms could be severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is needed through this evening. Spotter
activation may be needed once again on Wednesday.

LMZ643>646-152015-
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-
306 PM CDT Tue Apr 14 2026

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

.DAY ONE...Tonight

Dense fog continues mainly north of Milwaukee through tonight.

Severe thunderstorms are expected this evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

Chances for thunderstorms continue through the end of the week,
with some strong to severe storms possible Wednesday and Friday
evening.

Fog may continue into Wednesday morning.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-152015-
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-
306 PM CDT Tue Apr 14 2026

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

.DAY ONE...Tonight

Dense fog continues for the northern two thirds of Lake Michigan
through tonight.

Severe thunderstorms are expected this evening, particularly over
the south half of the lake.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

Chances for thunderstorms continue through the end of the week,
with some strong to severe storms possible Wednesday and Friday
evening.

Fog may continue into Wednesday morning.

MRC

www.weather.gov/mkx

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
434 PM CDT Tue Apr 14 2026

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

0429 PM     Hail             5 SE Arena              43.09N 89.87W
04/14/2026  M2.00 Inch       Iowa               WI   Public

0426 PM     Hail             1 W Mount Horeb         43.01N 89.74W
04/14/2026  E0.75 Inch       Dane               WI   Public

            Report from mPING: Dime (0.75 in.).

0428 PM     Hail             1 SE Blue Mounds        43.01N 89.82W
04/14/2026  E0.75 Inch       Dane               WI   Public

            Report from mPING: Dime (0.75 in.).

0431 PM     Hail             4 W Black Earth         43.11N 89.82W
04/14/2026  M1.75 Inch       Dane               WI   Public

&&

Halbach

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
436 PM CDT Tue Apr 14 2026

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

0433 PM     Hail             1 SE Barneveld          43.01N 89.89W
04/14/2026  E1.00 Inch       Iowa               WI   Public

            Report from mPING: Quarter (1.00 in.).

0434 PM     Hail             2 NE Blue Mounds        43.04N 89.81W
04/14/2026  E1.00 Inch       Dane               WI   Public

            Report from mPING: Quarter (1.00 in.).

&&

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
438 PM CDT Tue Apr 14 2026

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

0436 PM     Hail             1 SW Black Earth        43.13N 89.76W
04/14/2026  M2.75 Inch       Dane               WI   Public

            Baseball sized hail falling causing
            significant damage to siding and roofs in
            the area.

&&

Halbach

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
439 PM CDT Tue Apr 14 2026

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

0437 PM     Hail             Black Earth             43.14N 89.75W
04/14/2026  E0.75 Inch       Dane               WI   Public

            Report from mPING: Dime (0.75 in.).

0438 PM     Hail             1 E Mazomanie           43.17N 89.77W
04/14/2026  M2.50 Inch       Dane               WI   Public

&&

Halbach

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
447 PM CDT Tue Apr 14 2026

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

0439 PM     Hail             Black Earth             43.14N 89.75W
04/14/2026  E1.00 Inch       Dane               WI   Public

            Report from mPING: Quarter (1.00 in.).

0444 PM     Hail             1 W Middleton           43.10N 89.53W
04/14/2026  M1.75 Inch       Dane               WI   Public

&&

Halbach

Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
450 PM CDT Tue Apr 14 2026

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

0438 PM     Hail             2 SSW Mazomanie         43.15N 89.81W
04/14/2026  M1.75 Inch       Dane               WI   Trained Spotter

            One hail stone of 2 inch diameter.

&&

MRC