Gale Warning 40, NWS Milwaukee, WI

314 
WHUS73 KMKX 200303
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
903 PM CST Fri Dec 19 2025

LMZ643>646-201115-
/O.CON.KMKX.SC.Y.0116.251220T0500Z-251220T2100Z/
/O.CON.KMKX.GL.W.0040.251220T2100Z-251221T0900Z/
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-
903 PM CST Fri Dec 19 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST
SATURDAY...
...GALE WARNING REMAINS IN EFFECT FROM 3 PM SATURDAY TO 3 AM CST
SUNDAY...

* WHAT...For the Small Craft Advisory, southwest winds 15 to 25 
  kt with gusts up to 35 kt and waves 5 to 8 ft expected. For 
  the Gale Warning, west winds 20 to 30 kt with gusts up to 40 
  kt expected.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...For the Small Craft Advisory, until 3 PM CST Saturday. 
  For the Gale Warning, from 3 PM Saturday to 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-201115-
/O.CON.KMKX.GL.W.0040.251220T0700Z-251221T0900Z/
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-
903 PM CST Fri Dec 19 2025

...GALE WARNING REMAINS IN EFFECT FROM 1 AM SATURDAY TO 3 AM CST
SUNDAY...

* WHAT...West winds 25 to 35 kt with gusts up to 40 kt and waves 
  8 to 13 ft expected.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...From 1 AM Saturday to 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

254 
WHUS73 KMKX 200817
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
217 AM CST Sat Dec 20 2025

LMZ643>646-201800-
/O.CON.KMKX.SC.Y.0116.000000T0000Z-251220T2100Z/
/O.CON.KMKX.GL.W.0040.251220T2100Z-251221T0900Z/
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-
217 AM CST Sat Dec 20 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS
AFTERNOON...
...GALE WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO
3 AM CST SUNDAY...

* WHAT...For the Small Craft Advisory, southwest winds 15 to 25 
  kt with gusts up to 30 kt and waves 5 to 8 ft. For the Gale 
  Warning, west winds 20 to 30 kt with gusts up to 35 kt 
  expected.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...For the Small Craft Advisory, until 3 PM CST this 
  afternoon. For the Gale Warning, from 3 PM this afternoon to 3 
  AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-201800-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
217 AM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...

* WHAT...West winds 25 to 35 kt with gusts up to 40 kt and waves 
  8 to 13 ft.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

712 
WHUS73 KMKX 201514
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
914 AM CST Sat Dec 20 2025

LMZ643>646-202315-
/O.CON.KMKX.SC.Y.0116.000000T0000Z-251220T2100Z/
/O.CON.KMKX.GL.W.0040.251220T2100Z-251221T0900Z/
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-
914 AM CST Sat Dec 20 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS
AFTERNOON...
...GALE WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO
3 AM CST SUNDAY...

* WHAT...For the Small Craft Advisory, southwest winds 15 to 25 
  kt with gusts up to 30 kt and waves 5 to 8 ft. For the Gale 
  Warning, west winds 20 to 30 kt with gusts up to 35 kt 
  expected.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...For the Small Craft Advisory, until 3 PM CST this 
  afternoon. For the Gale Warning, from 3 PM this afternoon to 3 
  AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-202315-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
914 AM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...

* WHAT...Southwest winds 20 to 30 kt with gale force gusts up to
  35 kt, becoming west 25 to 35 kt with gale force gusts to 40 kt.  
  Waves 8 to 13 ft.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

* ADDITIONAL INFORMATION...The stronger westerly winds will arrive
  along a cold front earlier in the north half than the south
  half, between 3 PM and 9 PM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

MRC

228 
WHUS73 KMKX 202044
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
244 PM CST Sat Dec 20 2025

LMZ643>646-210445-
/O.EXP.KMKX.SC.Y.0116.000000T0000Z-251220T2100Z/
/O.CON.KMKX.GL.W.0040.251220T2100Z-251221T0900Z/
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-
244 PM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CST THIS AFTERNOON...

* WHAT...West winds 20 to 30 kt with gusts up to 35 kt expected.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-210445-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
244 PM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...

* WHAT...West winds 25 to 35 kt with gusts up to 40 kt and waves 
  7 to 12 ft.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

* ADDITIONAL INFORMATION...The stronger westerly winds will 
  arrive along a cold front earlier in the north half than the 
  south half, between 3 PM and 9 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

MRC

026 
WHUS73 KMKX 210209
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
809 PM CST Sat Dec 20 2025

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-210900-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
809 PM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...

* WHAT...Northwest winds 25 to 35 kt and waves 7 to 12 ft.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

* ADDITIONAL INFORMATION...The stronger westerly winds will 
  arrive along a cold front earlier in the north half than the 
  south half, between 3 PM and 9 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ643>646-210900-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
809 PM CST Sat Dec 20 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST SUNDAY...

* WHAT...Northwest winds 20 to 25 kt with gusts up to 35 kt.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...Until 3 AM CST Sunday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

397 
WHUS73 KMKX 210818
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
218 AM CST Sun Dec 21 2025

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-210930-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
218 AM CST Sun Dec 21 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST EARLY THIS
MORNING...

* WHAT...Northwest winds around 25 kt with gusts up to 30 kt and 
  waves 7 to 10 ft.

* WHERE...All Open Waters of Lake Michigan.

* WHEN...Until 3 AM CST early this morning.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

* ADDITIONAL INFORMATION...The stronger westerly winds will 
  arrive along a cold front earlier in the north half than the 
  south half, between 3 PM and 9 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LMZ643>646-210930-
/O.CON.KMKX.GL.W.0040.000000T0000Z-251221T0900Z/
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-
218 AM CST Sun Dec 21 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM CST EARLY THIS
MORNING...

* WHAT...Northwest winds around 20 kt with gusts up to 25 kt.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...Until 3 AM CST early this morning.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
1056 AM CST Fri Dec 19 2025

.KEY MESSAGES...

- Light snow & freezing drizzle possible (~15-25% chances) along/ahead
  of a cold front Saturday.

- Light rain & snow possible (~15-25% chances) north of I-94 &
  US-18 Monday through Monday night.

- Temperatures trending well above normal Tuesday through
  Christmas Day.

&&

.UPDATE...
Issued 1038 AM CST Fri Dec 19 2025

Forecast details remain on track this morning. Winds are slowly
easing from west to east this morning as a surface ridge builds
into the area. Gusts to 30 mph are lingering along the
lakeshore, but obs from Madison westward are showing a sharp
drop in gusts with westward extent from around 20mph to 10mph.
With the easing winds, expect wind chills to improve a bit this
afternoon. However, conditions will still be chilly with air
temperatures in the upper teens.

CMiller

&&

.SHORT TERM...
Issued 350 AM CST Fri Dec 19 2025

Today through Saturday:

Synopsis/Mesoanalysis: Surface observations place an area of low
pressure along the Ontario-Quebec border this morning. Positioned
along the back side of the low, blustery northwest winds continue
across southern Wisconsin, advecting Arctic air into the area. Light
flurries & snow showers continue in the vicinity of an upper trough
over the eastern half of the area. The combination of blustery winds
and cold air advection will result in a very chilly start to the day
today, with wind chills falling into the -5 to -15 range through
sunrise. Currently centered over the Northern Plains, a narrow ridge
of surface high pressure will cross southern Wisconsin today,
allowing winds to taper by the early afternoon hours. The high will
push east of the region tonight, allowing for a southerly wind shift
and steadily climbing temperatures after midnight. Currently
ejecting into the Canadian Prairies, a second upper disturbance and
affiliated surface low will move into Ontario tonight, ultimately
progressing into Quebec during the day on Saturday. Progression of
these features will drag a cold front across southern Wisconsin
Saturday morning and afternoon. Light precipitation is possible
along the approaching/passing front, potentially beginning as
drizzle or freezing drizzle before transitioning to snow. While
snow & ice accumulations will remain minor, a few slick spots
can't be ruled out on elevated and untreated surfaces Saturday
morning & afternoon. Budget a few extra minutes of travel time
if planning to be on the roads.

Rest Of Overnight: Blustery conditions continue along the back side
of departing low pressure, with low level cold advection
allowing single digit & low teen air temps to move into southern
Wisconsin before sunrise. The arriving Arctic air will combine
with the gusty northwest winds to support chilly wind chills in
the -5 to -15 range through daybreak. Bundle up if heading
outdoors this morning. Light flurries & snow showers will wrap
up after sunrise.

Saturday: Light precipitation is expected along/ahead of an
approaching cold front, with the best potential currently
anticipated over the eastern part of the area. Given low level warm
advection ahead of the front, in addition to a lack of cloud
ice in the prefrontal environment, some precip could start as
light drizzle or freezing drizzle. Precip will then quickly
transition to all snow along/behind the front as frontogenesis &
cold advection allow for the return of cloud ice. Snow & ice
accumulations are expected to remain light (dusting/glaze or
less), though isolated slick spots can't be ruled out on
elevated and untreated surfaces. Budget a few extra minutes of
travel time if planning to be on the roads Saturday.

Quigley

&&

.LONG TERM...
Issued 350 AM CST Fri Dec 19 2025

Saturday night through Thursday:

With the weak clipper system of Friday night into Saturday afternoon
to the east of the state, high pressure will move into the state and
kick off a stretch of roller coaster temperatures. The upper levels
have a ridge building in across much of the western and central
CONUS. The GFS tends to be a bit more zonal with this ridge for its
deterministic run while the CAN and EURO are a bit more amplified.
This tracks well with much of the ensemble data especially when you
start to look into Sunday and Monday. Model clusters show a monopole
distribution, which points to uncertainty in the amplitude of the
ridge. The uncertainty will definitely increases further out in time
which is why its in the model clusters at 500mb, but the reason for
pointing it out is the strength of this ridge will impact the
ability of a trough/low to dig south into the Great Lakes for later
in the period. More amplification, the less the low digs south and
we get scraps/a glancing blow at precip at best. Less amplified
ridge could allow more shortwaves through for slight better chances
for precip and would allow for a more southern track with the next
strong trough Thursday into Friday (12/25-12/26).

There is a small chance for some light rain and snow along WAA
Monday, but the track of the shortwave looks to have shifted
slightly further north with this run of guidance. This system is
largely in the mid levels around 850 mb with the WAA and shortwave
as the upper levels will still be under the ridge. The better
support for this WAA precip looks to be to our north with the mid
level and sfc level low that traverses from the US/Canada border
near Montana almost due east. The better DIV is north, the better
winds and LLJ are north.... overall the slight chance for
precipitation remains but its mainly across our the northern section
of our forecast area around 10-20%.

Now the roller coaster temps, there will be a prolonged period with
a southerly component to the winds (whether its southwest or due
southerly doesn't seem to matter much). This will allow for WAA to
persist from early next week into the end of the week. Highs in the
20s on Sunday will give way to for temps to potentially crawl into
the 50s by Thursday. Areas along the WI/IL boarder have the best
chances for those 50 degree temps, but overall doesn't matter much
if your like me and desperately hoping for a white Christmas. For
additional context depending on the day, temps in the 50s approach
records, a far cry from the normals in the low 30s. If your a cold
and snowy person, then we can all look to the CMC Ensembles for hope
beyond day 7. For those looking for warmth and rain then the EURO
Ensembles are your friend.

Patterson

&&

.AVIATION...
Issued 1056 AM CST Fri Dec 19 2025

Expect easing northwest wind through the rest of this morning
into the early afternoon. Winds will briefly become light an
westerly during the late afternoon, and light and southerly
this evening. South winds then increase overnight with gusts
between 20 to 25 knots becoming prevalent toward daybreak on
Saturday. Winds then become westerly and northwesterly Saturday
afternoon following a cold front.

Remaining dry and overall VFR through tonight until a cold front
approaches from the northwest. Ceilings should lower along the
front becoming low VFR to MVFR (2500 to 4500ft). Some freezing
drizzle and light snow is possible along the front between 12Z
and 18Z Sat.

CMiller

&&

.MARINE...
Issued 350 AM CST Fri Dec 19 2025

983 mb low pressure is centered near the Ontario-Quebec border early
this morning, leading to gusty northwest winds across the open
waters. Gusty conditions will continue into this morning and
afternoon. Gale Warnings remain in effect until 12 PM CST over the
southern two-thirds of Lake Michigan, and until 3 PM CST over the
northern third. Areas of snow showers will continue on the back side
of the low through this afternoon. Winds will subside from late
afternoon through the first half of this evening as a narrow area of
1016 mb high pressure approaches and crosses the open waters. Areas
of moderate freezing spray will continue into this afternoon, with
conditions improving by this evening.

High pressure will quickly shift east of Lake Michigan tonight,
bringing a southerly wind shift to the open waters. Southerly winds
will quickly become gusty by daybreak Saturday as 996 mb low
pressure moves into southwestern Ontario. Winds may briefly approach
gale force over the southern third of Lake Michigan during the early
morning hours Saturday, though any such gusts aren't expected to be
widespread enough to justify headlines at this time. The low will
progress toward the Ontario-Quebec border Saturday night, bringing a
gusty northwest wind shift to the open waters. Widespread gale force
gusts are anticipated during this time frame, particularly over the
northern two-thirds of the waters. A Gale Watch has thus been issued
between 3 PM CST Saturday and 3 AM Sunday for the northern two-
thirds of Lake Michigan. Winds will taper Sunday morning as 1032 mb
high pressure moves into the Upper Midwest. Periods of snow showers
& light to moderate freezing spray will accompany the passing low
Saturday & Saturday night.

Gusty northwest winds continue through the first half of this
morning in nearshore zones, where a Gale Warning remains in effect
until 9 AM CST. Winds will gradually decrease by this evening,
though Small Craft Advisory conditions will continue through the
first half of the afternoon hours. Areas of light to moderate
freezing spray are possible. Winds will increase & shift southerly
tonight as the next area of low pressure builds into the Northern
Plains. Small Craft Advisory conditions are expected to return by
midnight. The aforementioned area of low pressure will move into
Quebec Saturday night, bringing a gusty northwest wind shift &
continued Small Craft Advisory conditions. Additional light to
moderate freezing spray is possible during this time frame. Winds
will taper Sunday morning.

Quigley

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...Gale Warning...LMZ080-LMZ366-LMZ565-LMZ567-LMZ669-LMZ671-
     LMZ673-LMZ675-LMZ777-LMZ779-LMZ868-LMZ870-LMZ872-LMZ874-
     LMZ876-LMZ878 until noon Friday.

     Gale Watch...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-LMZ567-
     LMZ669-LMZ671-LMZ673-LMZ675-LMZ868-LMZ870-LMZ872-LMZ874-
     LMZ876...3 PM Saturday to 3 AM Sunday.

     Gale Warning...LMZ261-LMZ362-LMZ364-LMZ563 until 2 PM Friday.

     Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646 until 2 PM
     Friday.

     Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646...11 PM
     Friday to 8 AM Sunday.

&&

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Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1035 AM CST Fri Dec 19 2025

WIZ046-047-051-052-056>060-062>072-201645-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1035 AM CST Fri Dec 19 2025

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

.DAY ONE...This Afternoon and Tonight

Wind chills in the single digits will persist through the
afternoon.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Light snow and freezing drizzle are possible during the day
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

LMZ643>646-201645-
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-
1035 AM CST Fri Dec 19 2025

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

.DAY ONE...This Afternoon and Tonight

Small Craft Advisory conditions expected through early afternoon,
and once again tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Small Craft Advisory conditions continue Saturday into Sunday
morning, with a few gales possible.

Additional Small Craft Advisory conditions are possible Monday and
Monday night.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-201645-
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-
1035 AM CST Fri Dec 19 2025

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

.DAY ONE...This Afternoon and Tonight

Gale Warning remains in effect until 12 PM CST across the
southern two-thirds of Lake Michigan, and until 3 PM CST over the
northern third.

Areas of moderate freezing spray continue through this afternoon.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Gale Watch is in effect between 3 PM CST Saturday and 3 AM CST
Sunday over the northern third of Lake Michigan.

Areas of moderate freezing spray expected Saturday night into
Sunday morning.

www.weather.gov/mkx