{"url_path":"/weather/alerts/2.49.0.1.840.0.acbb1f15a254636e9a57619e17f55b17f8dfbcf7.001.1","section_key":"alert","section_title":"Special Marine Warning issued July 17 at 6:11PM CDT until July 17 at 7:30PM CDT by NWS Duluth MN","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.acbb1f15a254636e9a57619e17f55b17f8dfbcf7.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Duluth MN"},"word_count":261,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued July 17 at 6:11PM CDT until July 17 at 7:30PM CDT by NWS Duluth MN\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Chequamegon Bay-Bayfield to Oak Point WI; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM\n**Issued by:** NWS Duluth MN\n**Sent:** 2026-07-17T18:11:00-05:00\n**Effective:** 2026-07-17T18:11:00-05:00\n**Expires:** 2026-07-17T19:30:00-05:00\n\n## Description\nFor the following areas...\nChequamegon Bay-Bayfield to Oak Point WI...\nLake Superior west of a line from Saxon Harbor WI to Grand Portage MN\nbeyond 5NM...\nOak Point to Saxon Harbor WI...\nOuter Apostle Islands Beyond 5 NM from Mainland...\nSand Island to Bayfield WI...\n\nAt 611 PM CDT, severe thunderstorms were located along a line\nextending from near Oak Point to 9 nm southwest of Ashland Breakwater\nLighthouse, moving southeast at 30 knots.\n\nHAZARD...Dangerous wind gusts in excess of 50 knots and small hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Boats could suffer significant structural damage in high\nwinds. Small craft could capsize in suddenly higher waves.\n\nsevere thunderstorms will be near...\nChequamegon Bay and Oak Point around 615 PM CDT.\nMarble Point around 620 PM CDT.\nSaxon Harbor around 625 PM CDT.\n\nOther locations impacted by severe thunderstorms include Marble\nPoint, Saxon Harbor, Basswood Island, and Apostle Islands National\nLake Shore.\n\nWith dense fog and smoke over the lake, you will not be able to see\nthe storm approaching. See safe harbor immediately.\n\n## Instructions\nMove to safe harbor immediately as gusty winds and high waves are\nexpected."}