833 WHUS71 KBOX 201315 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 915 AM EDT Wed May 20 2026 ANZ232>235-237-210000- /O.EXB.KBOX.SC.Y.0057.260520T1500Z-260521T0000Z/ Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound- Block Island Sound- 915 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and seas 3 to 5 feet expected. * WHERE...In Massachusetts coastal waters, Nantucket Sound, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound and Block Island Sound. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ ANZ254>256-210215- /O.CON.KBOX.SC.Y.0057.000000T0000Z-260521T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 915 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT THURSDAY... * WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and seas 4 to 6 feet. * WHERE...In Massachusetts coastal waters, Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM and Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket. In Rhode Island coastal waters, Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island. * WHEN...Until 2 AM EDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  028 WHHW70 PHFO 201320 MWWHFO URGENT - MARINE WEATHER MESSAGE National Weather Service Honolulu HI 320 AM HST Wed May 20 2026 PHZ115>118-122-210230- /O.EXB.PHFO.SC.Y.0025.000000T0000Z-260522T1600Z/ Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters- Maui County Leeward Waters-Big Island Windward Waters- 320 AM HST Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM HST FRIDAY... * WHAT...East winds 15 to 25 kt and seas 7 to 11 feet. * WHERE...Oahu Leeward Waters, Kaiwi Channel, Maui County Windward Waters, Maui County Leeward Waters and Big Island Windward Waters. * WHEN...Until 6 AM HST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ PHZ110>114-210230- /O.EXB.PHFO.SC.Y.0025.260521T0400Z-260522T1600Z/ Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters- Kauai Channel-Oahu Windward Waters- 320 AM HST Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 AM HST FRIDAY... * WHAT...East winds 20 to 25 kt and seas 7 to 11 feet expected. * WHERE...Kauai Northwest Waters, Kauai Windward Waters, Kauai Leeward Waters, Kauai Channel and Oahu Windward Waters. * WHEN...From 6 PM this evening to 6 AM HST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ PHZ120-121-210230- /O.EXT.PHFO.SC.Y.0025.000000T0000Z-260521T1600Z/ /O.NEW.PHFO.GL.A.0006.260521T1600Z-260522T1600Z/ Pailolo Channel-Alenuihaha Channel- 320 AM HST Wed May 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM HST THURSDAY... ...GALE WATCH IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, east winds 20 to 30 kt. For the Gale Watch, northeast winds 25 to 35 kt and seas 7 to 10 feet possible. * WHERE...Pailolo Channel and Alenuihaha Channel. * WHEN...For the Small Craft Advisory, until 6 AM HST Thursday. For the Gale Watch, from Thursday morning through late Thursday night. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Gale Watch is issued when the risk of gale force winds of 34 to 47 knots has significantly increased but the specific timing and/or location is still uncertain. It is intended to provide additional lead time for mariners who may wish to consider altering their plans. && $$ PHZ119-123-124-210230- /O.EXT.PHFO.SC.Y.0025.000000T0000Z-260522T1600Z/ Maalaea Bay-Big Island Leeward Waters-Big Island Southeast Waters- 320 AM HST Wed May 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM HST FRIDAY... * WHAT...Northeast winds 20 to 30 kt and seas 8 to 12 feet. * WHERE...Maalaea Bay, Big Island Leeward Waters and Big Island Southeast Waters. * WHEN...Until 6 AM HST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$  254 WHUS71 KLWX 201329 MWWLWX URGENT - MARINE WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 929 AM EDT Wed May 20 2026 ANZ533-534-537-542-543-202130- /O.CON.KLWX.SC.Y.0088.260520T1900Z-260521T0000Z/ Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Cobb Island MD to Smith Point VA- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island- 929 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... * WHAT...South winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE...Chesapeake Bay from North Beach MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Patuxent River to Broomes Island MD, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN...From 3 PM this afternoon to 8 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  080 WHUS73 KMKX 201351 MWWMKX URGENT - MARINE WEATHER MESSAGE National Weather Service Milwaukee/Sullivan WI 851 AM CDT Wed May 20 2026 LMZ645-646-202200- /O.EXT.KMKX.SC.Y.0056.260520T2000Z-260521T1800Z/ North Point Light to Wind Point WI- Wind Point WI to Winthrop Harbor IL- 851 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 3 PM THIS AFTERNOON TO 1 PM CDT THURSDAY... * WHAT...Northeast to easterly winds 10 to 15 kt with gusts to around 20 kt and waves 3 to 5 feet expected. * WHERE...Nearshore Waters from North Point Lighthouse to Winthrop Harbor IL. * WHEN...From 3 PM this afternoon to 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ MRC  279 WHCA72 TJSJ 201357 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 957 AM AST Wed May 20 2026 AMZ711-202200- /O.CON.TJSJ.SC.Y.0018.000000T0000Z-260521T2200Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 957 AM AST Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM AST THURSDAY... * WHAT...East winds 15 to 20 kt with gusts up to 30 kt and seas 6 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N. * WHEN...Until 6 PM AST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  329 WHUS73 KAPX 201358 MWWAPX URGENT - MARINE WEATHER MESSAGE National Weather Service Gaylord MI 958 AM EDT Wed May 20 2026 LHZ345>348-201800- /O.CON.KAPX.SC.Y.0041.000000T0000Z-260520T1800Z/ Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island-St Ignace to False Detour Channel- 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island- Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary- 958 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...Highest gusts up to 25 kts from the northwest and highest waves around 6 feet. * WHERE...Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island, St Ignace to False Detour Channel, 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island and Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary. * WHEN...Until 2 PM EDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LSZ321-322-201800- /O.CON.KAPX.SC.Y.0041.000000T0000Z-260520T1800Z/ Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI- St. Marys River Point Iroquois to E. Potagannissing Bay- 958 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...Highest gusts up to 25 kts from the northwest and highest waves around 5 feet. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI and St. Marys River Point Iroquois to E. Potagannissing Bay. * WHEN...Until 2 PM EDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$