####018001964####
FZUS73 KLOT 160142

MWSLOT



Marine Weather Statement

National Weather Service Chicago/Romeoville

842 PM CDT Thu May 15 2025



LMZ741-160150-

/O.CAN.KLOT.MA.W.0009.000000T0000Z-250516T0200Z/

842 PM CDT Thu May 15 2025



...THE SPECIAL MARINE WARNING IS CANCELLED...



The affected areas were...



  Nearshore Waters from Wilmette Harbor to Northerly Island...



The thunderstorms have moved out of the warned area and no longer 

poses a significant threat to boaters.



A Tornado Watch remains in effect until 1000 PM CDT for the adjacent

waters of Lake Michigan.



&&



LAT...LON 4213 8696 4188 8697 4189 8738 4216 8729

      4238 8700

TIME...MOT...LOC 0140Z 235DEG 49KT 4258 8667 



$$



LMZ777-779-160200-

/O.CON.KLOT.MA.W.0009.000000T0000Z-250516T0200Z/

842 PM CDT Thu May 15 2025



...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 900 PM CDT...



For the following areas...



  Open Waters from Winthrop Harbor to Michigan City out to Mid

Lake...



At 840 PM CDT, a line of severe thunderstorms was located 19 nm 

northwest of South Haven Light, moving northeast at 45 knots.



HAZARD...Wind gusts in excess of 50 knots and large hail.



SOURCE...Radar indicated.



IMPACT...Boats could suffer significant structural damage in high 

         winds and hail. Small craft could capsize in suddenly 

         higher waves.



The severe thunderstorm will remain over mainly open waters.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



A Tornado Watch remains in effect until 1000 PM CDT for the adjacent

waters of Lake Michigan.



Frequent lightning is occurring with these storms. If caught on the 

open water stay below deck if possible, keep away from ungrounded 

metal objects.



&&



LAT...LON 4213 8696 4188 8697 4189 8738 4216 8729

      4238 8700

TIME...MOT...LOC 0140Z 235DEG 49KT 4258 8667 



HAIL...>.75IN

WIND...50KTS



$$



Doom

####018000862####
FZUS73 KGRB 160144

MWSGRB



Marine Weather Statement

National Weather Service GREEN BAY WI

Issued by National Weather Service Milwaukee/Sullivan WI

844 PM CDT Thu May 15 2025



LMZ542-543-565-567-160153-

/O.CAN.KGRB.MA.W.0005.000000T0000Z-250516T0215Z/

844 PM CDT Thu May 15 2025



...THE SPECIAL MARINE WARNING IS CANCELLED...



The affected areas were... 

NEARSHORE AND OPEN WATERS OF LAKE MICHIGAN FROM STURGEON BAY TO

SHEBOYGAN...



The thunderstorms have weakened and no longer pose a significant

threat to boaters.



LAT...LON 4390 8758 4390 8773 4402 8768 4406 8765

      4409 8765 4410 8768 4414 8761 4417 8762

      4413 8759 4416 8757 4415 8757 4419 8751

      4423 8751 4429 8754 4436 8752 4444 8687

      4413 8701 4383 8709

TIME...MOT...LOC 0142Z 243DEG 23KT 4449 8680 4393 8681 



$$



GEHRING

####018002167####
FZUS73 KLOT 160145

MWSLOT



Marine Weather Statement

National Weather Service Chicago/Romeoville

845 PM CDT Thu May 15 2025



LMZ741-742-160153-

/O.CAN.KLOT.MA.W.0010.000000T0000Z-250516T0215Z/

845 PM CDT Thu May 15 2025



...THE SPECIAL MARINE WARNING IS CANCELLED...



The affected areas were...



  Nearshore Waters from Wilmette Harbor to Calumet Harbor...



The thunderstorms have moved out of the warned area and no longer 

poses a significant threat to boaters.



A Tornado Watch remains in effect until 1000 PM CDT for northwestern

Indiana...and the adjacent waters of Lake Michigan.



&&



LAT...LON 4169 8740 4190 8738 4189 8697 4179 8697

      4179 8696 4172 8691 4163 8716 4162 8727

TIME...MOT...LOC 0143Z 236DEG 43KT 4193 8722 



$$



LMZ743>745-779-160215-

/O.CON.KLOT.MA.W.0010.000000T0000Z-250516T0215Z/

845 PM CDT Thu May 15 2025



...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 915 PM CDT...



For the following areas...



  Nearshore Waters from Calumet Harbor to Michigan City...

  Open Waters from Wilmette Harbor to Michigan City out to Mid

Lake...



At 843 PM CDT, a cluster of severe thunderstorm was located 15 nm 

southeast of Harrison-Dever Crib, moving northeast at 45 knots.



HAZARD...Wind gusts in excess of 65 knots and large hail.



SOURCE...Radar indicated.



IMPACT...Boats could suffer significant structural damage in high 

         winds and hail. Small craft could capsize in suddenly 

         higher waves.



Locations impacted include...

Marina Shores at Dune Harbor and Burns Harbor.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



A Tornado Watch remains in effect until 1000 PM CDT for northwestern

Indiana...and the adjacent waters of Lake Michigan.



Frequent lightning is occurring with these storms. If caught on the 

open water stay below deck if possible, keep away from ungrounded 

metal objects.



&&



LAT...LON 4169 8740 4190 8738 4189 8697 4179 8697

      4179 8696 4172 8691 4163 8716 4162 8727

TIME...MOT...LOC 0143Z 236DEG 43KT 4193 8722 



HAIL...>.75IN

WIND...65KTS



$$



Doom