{"url_path":"/weather/alerts/2.49.0.1.840.0.c0c05f649a1e5af9fa37ee102be6160dd9bad3d1.004.1","section_key":"alert","section_title":"Small Craft Advisory issued July 20 at 3:56PM EDT until July 21 at 10:00PM EDT by NWS Detroit/Pontiac MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-20","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c0c05f649a1e5af9fa37ee102be6160dd9bad3d1.004.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Detroit/Pontiac MI"},"word_count":154,"has_tables":false,"body_markdown":"# Small Craft Advisory: Small Craft Advisory issued July 20 at 3:56PM EDT until July 21 at 10:00PM EDT by NWS Detroit/Pontiac MI\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Lake St. Clair Open Lake (U.S. Portion); Michigan Waters of Lake Erie from Detroit River to North Cape MI\n**Issued by:** NWS Detroit/Pontiac MI\n**Sent:** 2026-07-20T15:56:00-04:00\n**Effective:** 2026-07-20T15:56:00-04:00\n**Expires:** 2026-07-21T04:15:00-04:00\n\n## Description\n* WHAT...Expect sustained winds up to 20 knots from the west\nwith gusts up to 27 knots. The largest significant waves will\nbe 3 feet with a potential maximum wave height of 4 feet.\n\n* WHERE...In Lake St Clair, Lake St Clair. In Lake Erie,\nMichigan Waters of Lake Erie from Detroit River to North Cape\nMI.\n\n* WHEN...The maximum winds are expected around 4 AM EDT Tuesday\nwith the largest waves expected around 8 AM EDT Tuesday.\n\n* IMPACTS...Conditions will be hazardous to small craft.\n\n## Instructions\nInexperienced mariners, especially those operating smaller\nvessels, should avoid navigating in hazardous conditions."}