{"url_path":"/weather/alerts/2.49.0.1.840.0.52c9f3b7698b9adb8762830dc05ad418b9de501e.001.1","section_key":"alert","section_title":"Special Marine Warning issued July 17 at 6:53PM EDT until July 17 at 7:30PM EDT by NWS Marquette MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.52c9f3b7698b9adb8762830dc05ad418b9de501e.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Marquette MI"},"word_count":182,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued July 17 at 6:53PM EDT until July 17 at 7:30PM EDT by NWS Marquette MI\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore\n**Issued by:** NWS Marquette MI\n**Sent:** 2026-07-17T18:53:00-04:00\n**Effective:** 2026-07-17T18:53:00-04:00\n**Expires:** 2026-07-17T19:30:00-04:00\n\n## Description\nFor the following areas...\nLake Superior East of a line from Manitou Island to Marquette MI and\nWest of a line from Grand Marais MI to the US/Canadian Border Beyond\n5NM from shore...\n\nAt 653 PM EDT, a severe thunderstorm was located 20 nm northeast of\nGranite Island, moving southeast at 40 knots.\n\nHAZARD...Wind gusts 34 knots or greater and large hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Small craft could be damaged in briefly higher winds and\nsuddenly higher waves. Large hail could result in\nstructural damage.\n\nThe severe thunderstorm will remain over mainly open waters.\n\n## Instructions\nFrequent lightning is occurring with this storm. If caught on the\nopen water stay below deck if possible, keep away from ungrounded\nmetal objects."}