{"url_path":"/weather/alerts/2.49.0.1.840.0.20a5e9b32adceed1e84ccb7387d3167cee9f28cc.001.1","section_key":"alert","section_title":"Small Craft Advisory issued September 17 at 3:48PM EDT until September 19 at 12:00AM EDT by NWS Detroit/Pontiac MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.20a5e9b32adceed1e84ccb7387d3167cee9f28cc.001.1","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 17 at 3:48PM 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:** 2026-09-17T15:48:00-04:00\n**Effective:** 2026-09-17T15:48:00-04:00\n**Expires:** 2026-09-18T04:15:00-04:00\n\n## Description\n* WHAT...Expect sustained winds up to 16 knots from the north\nwith gusts up to 20 knots. The largest significant waves will\nbe 4 feet with a potential maximum wave height of 6 feet.\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 8 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."}