681 FZUS73 KGRR 120110 MWSGRR Marine Weather Statement National Weather Service Grand Rapids MI 910 PM EDT Thu Jun 11 2026 LMZ845>847-872-874-876-120119- /O.CAN.KGRR.MA.W.0039.000000T0000Z-260612T0130Z/ 910 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Nearshore and Open Waters from South Haven to Whitehall MI... The thunderstorms have moved out of the area and no longer pose a significant threat to boaters. Thunderstorms are still possible across the area tonight. A Tornado Watch remains in effect until 200 AM EDT for southwestern and west central Michigan...and the adjacent waters of Lake Michigan. LAT...LON 4258 8624 4262 8633 4270 8652 4301 8654 4313 8628 4312 8627 4296 8622 4269 8621 TIME...MOT...LOC 0107Z 250DEG 45KT 4298 8591 4289 8589 $$ TJT 737 FZUS73 KLOT 120117 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 817 PM CDT Thu Jun 11 2026 LMZ740-777-120215- /O.CON.KLOT.MA.W.0039.000000T0000Z-260612T0215Z/ 817 PM CDT Thu Jun 11 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 915 PM CDT... For the following areas... Nearshore Waters from Winthrop Harbor to Wilmette Harbor... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... At 817 PM CDT, severe thunderstorms were located along a line extending from 16 nm east of Winthrop Harbor to near Ohare Airport to near Joliet, moving northeast at 45 knots. HAZARD...Wind gusts in excess of 50 knots. SOURCE...Radar indicated. IMPACT...Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. Severe thunderstorms will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for the adjacent waters of Lake Michigan. Frequent lightning is occurring with these storms. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 4223 8781 4247 8732 4246 8702 4212 8696 4211 8760 4208 8768 4221 8779 TIME...MOT...LOC 0117Z 245DEG 45KT 4238 8745 4199 8781 4159 8806 HAIL...0.00IN WIND...50KTS $$ Ogorek 395 FZUS73 KLOT 120120 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 820 PM CDT Thu Jun 11 2026 LMZ741>745-779-120245- /O.CON.KLOT.MA.W.0041.000000T0000Z-260612T0245Z/ 820 PM CDT Thu Jun 11 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM CDT... For the following areas... Nearshore Waters from Wilmette Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 819 PM CDT, severe thunderstorms capable of producing waterspouts and damaging winds were located along a line extending from near Wilmette Harbor to near Midway Airport to near Joliet, moving east at 60 knots. HAZARD...Waterspouts and wind gusts in excess of 65 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. Locations impacted include... Harrison-Dever Crib, Wilmette Harbor, 31st Street Harbor, Monroe Harbor, Burns Harbor, Calumet Harbor, Indiana Harbor, Montrose Harbor, Burnham Harbor, Hammond Marina, Jackson Park Harbor, and Belmont Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for northeastern Illinois...northwestern Indiana...and the adjacent waters of Lake Michigan. && LAT...LON 4162 8733 4164 8742 4166 8743 4167 8742 4169 8750 4183 8760 4188 8762 4189 8760 4190 8762 4208 8768 4211 8760 4212 8696 4179 8697 4172 8692 4165 8711 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 0119Z 263DEG 59KT 4213 8771 4174 8782 4157 8805 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...65KTS $$ Ogorek 831 FZUS73 KGRB 120124 MWSGRB Marine Weather Statement National Weather Service Green Bay WI 824 PM CDT Thu Jun 11 2026 LMZ521-522-541-120330- 824 PM CDT Thu Jun 11 2026 The areas affected include... Nearshore waters from Washington Island to Sturgeon Bay... Central and Southern Bay of Green Bay... * At 824 PM CDT, Doppler radar indicated a front, capable of producing winds to around 30 knots along with a shift in wind direction to the west. This front was located along a line from 12 miles southwest of Pembine to near Black Creek, or along a line from 36 miles east of Crandon to 15 miles north of Appleton, moving east at 20 mph. The front will be near... Long Tail Point Light around 910 PM CDT. Green Bay Harbor Entrance Light around 920 PM CDT. Other locations impacted by this front include Howard and Red Banks. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and a shift in wind direction to the west. Boaters should seek safe harbor immediately until these storms pass. && LAT...LON 4498 8763 4498 8765 4515 8760 4541 8735 4541 8695 4534 8691 4540 8685 4515 8708 4529 8698 4517 8724 4491 8741 4482 8737 4489 8743 4485 8758 4454 8793 4457 8804 4493 8784 TIME...MOT...LOC 0122Z 278DEG 19KT 4550 8817 4497 8821 4448 8839 $$ Kurimski 246 FZUS71 KLWX 120138 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 938 PM EDT Thu Jun 11 2026 ANZ530>532-538-539-120148- /O.EXP.KLWX.MA.W.0071.000000T0000Z-260612T0145Z/ 938 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING WILL EXPIRE AT 945 PM EDT... The affected areas were... Chesapeake Bay from Pooles Island to Sandy Point MD... Chesapeake Bay from Sandy Point to North Beach MD... Chesapeake Bay north of Pooles Island MD... Chester River to Queenstown MD... Patapsco River including Baltimore Harbor... The thunderstorms have moved out of the warned area and no longer pose a significant threat to boaters. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for central and northern Maryland...and the adjacent coastal waters. A Severe Thunderstorm Watch also remains in effect until midnight EDT for northeastern Maryland...and the adjacent coastal waters. && LAT...LON 3959 7593 3949 7597 3954 7587 3945 7584 3940 7601 3936 7588 3935 7592 3932 7618 3915 7628 3900 7617 3904 7631 3874 7634 3872 7653 3902 7641 3926 7665 3923 7643 3941 7637 3948 7622 3937 7622 TIME...MOT...LOC 0138Z 269DEG 35KT 3972 7575 3939 7580 3909 7599 $$ LFR 023 FZUS71 KLWX 120146 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 946 PM EDT Thu Jun 11 2026 ANZ533-541>543-120156- /O.CAN.KLWX.MA.W.0073.000000T0000Z-260612T0200Z/ 946 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Chesapeake Bay from North Beach to Drum Point MD... Choptank River to Cambridge MD and the Little Choptank River... Patuxent River to Broomes Island MD... Tangier Sound and the inland waters surrounding Bloodsworth Island... The thunderstorms have moved out of the area and no longer pose a significant threat to boaters. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for central Maryland...and the adjacent coastal waters. A Severe Thunderstorm Watch also remains in effect until midnight EDT for southern Maryland...and the adjacent coastal waters. && LAT...LON 3835 7654 3885 7652 3885 7649 3872 7652 3878 7629 3878 7627 3877 7630 3872 7630 3872 7629 3876 7623 3860 7605 3859 7605 3861 7628 3853 7628 3854 7620 3850 7633 3837 7628 3837 7600 TIME...MOT...LOC 0144Z 229DEG 48KT 3995 7581 3943 7596 $$ LFR 260 FZUS71 KLWX 120147 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 947 PM EDT Thu Jun 11 2026 ANZ533-541-542-120157- /O.CAN.KLWX.MA.W.0074.000000T0000Z-260612T0200Z/ 947 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Chesapeake Bay from North Beach to Drum Point MD... Choptank River to Cambridge MD and the Little Choptank River... Patuxent River to Broomes Island MD... The thunderstorms have moved out of the area and no longer pose a significant threat to boaters. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for central Maryland...and the adjacent coastal waters. A Severe Thunderstorm Watch also remains in effect until midnight EDT for southern Maryland...and the adjacent coastal waters. && LAT...LON 3861 7628 3853 7628 3854 7621 3849 7633 3833 7626 3832 7642 3842 7644 3836 7645 3835 7654 3842 7654 3843 7644 3850 7652 3872 7653 3878 7627 3877 7630 3872 7630 3876 7623 3859 7605 TIME...MOT...LOC 0144Z 229DEG 48KT 3994 7583 3942 7597 $$ LFR 631 FZUS73 KLOT 120153 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 853 PM CDT Thu Jun 11 2026 LMZ740-120203- /O.CAN.KLOT.MA.W.0039.000000T0000Z-260612T0215Z/ 853 PM CDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Nearshore Waters from Winthrop Harbor to Wilmette Harbor... The thunderstorms have moved out of the warned area and no longer pose a significant threat to boaters. A Tornado Watch remains in effect until 900 PM CDT for the adjacent waters of Lake Michigan. && LAT...LON 4211 8735 4226 8727 4235 8700 4212 8696 TIME...MOT...LOC 0153Z 255DEG 53KT 4225 8709 4211 8717 4197 8726 $$ LMZ777-120215- /O.CON.KLOT.MA.W.0039.000000T0000Z-260612T0215Z/ 853 PM CDT Thu Jun 11 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 915 PM CDT... For the following areas... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... At 853 PM CDT, severe thunderstorms were located along a line extending from 27 nm west of St. Joseph Light to 22 nm northeast of Montrose Harbor to 14 nm east of Harrison-Dever Crib, moving east at 55 knots. HAZARD...Wind gusts in excess of 50 knots. SOURCE...Radar indicated. IMPACT...Boats could suffer significant structural damage in high winds. 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 900 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 4211 8735 4226 8727 4235 8700 4212 8696 TIME...MOT...LOC 0153Z 255DEG 53KT 4225 8709 4211 8717 4197 8726 HAIL...0.00IN WIND...50KTS $$ Ogorek 303 FZUS71 KLWX 120155 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 955 PM EDT Thu Jun 11 2026 ANZ537-120205- /O.CAN.KLWX.MA.W.0075.000000T0000Z-260612T0230Z/ 955 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Tidal Potomac from Cobb Island MD to Smith Point VA... The thunderstorms have weakened and no longer pose a significant threat to boaters. A Severe Thunderstorm Watch remains in effect until midnight EDT for southern Maryland...and the adjacent coastal waters. && LAT...LON 3803 7651 3815 7661 3817 7685 3826 7686 3827 7700 3829 7687 3823 7658 3833 7652 3835 7640 3834 7643 3832 7646 3831 7647 3830 7637 3826 7640 3810 7633 3816 7637 3813 7648 3809 7633 3791 7627 TIME...MOT...LOC 0153Z 262DEG 46KT 3886 7541 3870 7555 3847 7571 $$ LFR 803 FZUS73 KLOT 120155 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 855 PM CDT Thu Jun 11 2026 LMZ741-742-120205- /O.CAN.KLOT.MA.W.0041.000000T0000Z-260612T0245Z/ 855 PM CDT Thu Jun 11 2026 ...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 pose a significant threat to boaters. A Tornado Watch remains in effect until 900 PM CDT for northwestern Indiana...and the adjacent waters of Lake Michigan. && LAT...LON 4162 8733 4164 8742 4166 8743 4167 8742 4211 8734 4212 8696 4179 8697 4172 8692 4165 8711 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 0155Z 259DEG 54KT 4213 8709 4183 8713 4161 8737 $$ LMZ743>745-779-120245- /O.CON.KLOT.MA.W.0041.000000T0000Z-260612T0245Z/ 855 PM CDT Thu Jun 11 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM CDT... For the following areas... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 855 PM CDT, severe thunderstorms capable of producing waterspouts and damaging winds were located along a line extending from 25 nm northeast of Harrison-Dever Crib to 10 nm north of Burns Harbor to Gary, moving east at 55 knots. HAZARD...Waterspouts and wind gusts in excess of 65 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. Locations impacted include... Burns Harbor and Marina Shores at Dune Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM CDT for northwestern Indiana...and the adjacent waters of Lake Michigan. && LAT...LON 4162 8733 4164 8742 4166 8743 4167 8742 4211 8734 4212 8696 4179 8697 4172 8692 4165 8711 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 0155Z 259DEG 54KT 4213 8709 4183 8713 4161 8737 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...65KTS $$ Ogorek 994 FZUS71 KLWX 120155 RRA MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 955 PM EDT Thu Jun 11 2026 ANZ534-543-120205- /O.CAN.KLWX.MA.W.0076.000000T0000Z-260612T0300Z/ 955 PM EDT Thu Jun 11 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Chesapeake Bay from Drum Point MD to Smith Point VA... Tangier Sound and the inland waters surrounding Bloodsworth Island... The thunderstorms have weakened and no longer pose a significant threat to boaters. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for central Maryland...and the adjacent coastal waters. A Severe Thunderstorm Watch also remains in effect until midnight EDT for southern Maryland...and the adjacent coastal waters. && LAT...LON 3790 7625 3814 7650 3807 7633 3829 7640 3813 7653 3824 7680 3824 7669 3823 7659 3840 7655 3831 7640 3841 7654 3909 7645 3910 7643 3832 7640 3840 7622 3822 7603 3836 7586 3835 7586 3790 7591 TIME...MOT...LOC 0153Z 262DEG 43KT 3905 7552 3858 7564 3825 7595 $$ LFR