{"url_path":"/weather/alerts/2.49.0.1.840.0.41a645a08794f2f9a7732456fb80f577fc7c6616.002.1","section_key":"alert","section_title":"Small Craft Advisory issued September 18 at 3:53PM EDT until September 19 at 12:00AM EDT by NWS Detroit/Pontiac MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-18","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.41a645a08794f2f9a7732456fb80f577fc7c6616.002.1","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":138,"has_tables":false,"body_markdown":"# Small Craft Advisory: Small Craft Advisory issued September 18 at 3:53PM EDT until September 19 at 12:00AM EDT by NWS Detroit/Pontiac MI\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Harbor Beach to Port Sanilac MI; Port Sanilac to Port Huron MI\n**Issued by:** NWS Detroit/Pontiac MI\n**Sent:** 2026-09-18T15:53:00-04:00\n**Effective:** 2026-09-18T15:53:00-04:00\n**Expires:** 2026-09-19T00:00:00-04:00\n\n## Description\n* WHAT...Expect sustained winds up to 18 knots from the\nnortheast with gusts up to 22 knots. The largest significant\nwaves will be 4 feet with a potential maximum wave height of 5\nfeet.\n\n* WHERE...Harbor Beach to Port Sanilac MI and Port Sanilac to\nPort Huron MI.\n\n* WHEN...The maximum winds are expected around 6 PM EDT Friday\nwith the largest waves expected around 7 PM EDT Friday.\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."}