881 

FZUS73 KMKX 180027
MWSMKX

Marine Weather Statement
National Weather Service Milwaukee/Sullivan WI
727 PM CDT Fri Apr 17 2026

LMZ644>646-671-673-675-180245-
/O.CON.KMKX.MA.W.0018.000000T0000Z-260418T0245Z/
727 PM CDT Fri Apr 17 2026

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM CDT...

For the following areas...
Lake Michigan nearshore and open waters to mid lake from Port
Washington WI to Winthrop Harbor IL...

At 727 PM CDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from 7 nm west of Bayside to
Milwaukee to 9 nm west of Oak Creek, moving northeast at 25 knots.

HAZARD...Waterspouts, wind gusts to nearly 50 knots, and large hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally
         hazardous seas. Small craft could be damaged in briefly
         higher winds and suddenly higher waves. Large hail could
         result in structural damage.

Severe thunderstorms will remain over mainly open waters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CDT for southeastern
Wisconsin.

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4335 8788 4338 8714 4246 8702 4248 8780
      4261 8782 4278 8775 4286 8784 4297 8785
      4303 8790 4307 8786 4313 8790 4318 8788
      4324 8791
TIME...MOT...LOC 0027Z 242DEG 24KT 4318 8808 4298 8801 4287 8811

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...49KTS

$$

WAGNER






701 

FZUS73 KMKX 180049
MWSMKX

Marine Weather Statement
National Weather Service Milwaukee/Sullivan WI
749 PM CDT Fri Apr 17 2026

LMZ644>646-671-673-675-180245-
/O.CON.KMKX.MA.W.0018.000000T0000Z-260418T0245Z/
749 PM CDT Fri Apr 17 2026

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM CDT...

For the following areas...
Lake Michigan nearshore and open waters to mid lake from Port
Washington WI to Winthrop Harbor IL...

At 749 PM CDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from near Bayside to North Pt.
Lt. to Milwaukee, moving northeast at 25 knots.

HAZARD...Waterspouts, wind gusts in excess of 50 knots, and large
         hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally
         hazardous seas. Boats could suffer significant structural
         damage in high winds and hail. Small craft could capsize in
         suddenly higher waves.

Severe thunderstorms will remain over mainly open waters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4335 8788 4338 8714 4246 8702 4248 8780
      4261 8782 4278 8775 4286 8784 4297 8785
      4303 8790 4307 8786 4313 8790 4318 8788
      4324 8791
TIME...MOT...LOC 0049Z 242DEG 24KT 4325 8791 4305 8784 4294 8794

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...50KTS

$$

WAGNER






111 

FZUS73 KGRB 180052
MWSGRB

Marine Weather Statement
National Weather Service Green Bay WI
752 PM CDT Fri Apr 17 2026

LMZ521-522-541-542-563-565-567-180130-
/O.CON.KGRB.MA.W.0006.000000T0000Z-260418T0130Z/
752 PM CDT Fri Apr 17 2026

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 830 PM CDT...

For the following areas...

Central and Southern Bay of Green Bay...
Nearshore waters from Washington Island to Two Rivers...
Open waters of Lake Michigan from Rock Island Passage to Sheboygan...

At 749 PM CDT, a gust front was located along a line extending from
20 nm southeast of Whitefish Point to 10 nm southeast of Sturgeon
Bay Ship Canal Light to near Sherwood Point Light to near Oconto,
moving northeast at 40 knots. Persistent gusts to around 40 knots
have been reported at Green Bay for nearly an hour.

HAZARD...Wind gusts to 40 knots.

SOURCE...Radar indicated.

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

Locations impacted include...
Sherwood Point Light, Long Tail Point Light, Peshtigo Reef Light, Bay
Shore Park, Whitefish Point, Kewaunee Pierhead Light, Eagle Bluff
Light, Rawley Point Light, Green Bay Harbor Entrance Light, and
Chambers Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

&&

LAT...LON 4533 8629 4488 8669 4406 8703 4416 8754
      4447 8754 4509 8705 4530 8699 4530 8707
      4493 8740 4480 8733 4481 8734 4489 8743
      4485 8758 4464 8777 4455 8802 4457 8804
      4493 8784 4498 8763 4515 8760 4540 8736
TIME...MOT...LOC 0049Z 210DEG 33KT 4466 8684 4470 8709 4485 8744 4493
8788

HAIL...0.00IN
WIND...40KTS

$$
Kieckbusch