{"url_path":"/weather/alerts/2.49.0.1.840.0.11efcadbf86b382cacf544b20d75a753474f0d04.001.1","section_key":"alert","section_title":"Small Craft Advisory issued September 18 at 11:32AM EDT until September 19 at 12:00PM EDT by NWS Boston/Norton MA","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-18","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.11efcadbf86b382cacf544b20d75a753474f0d04.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Boston/Norton MA"},"word_count":222,"has_tables":false,"body_markdown":"# Small Craft Advisory: Small Craft Advisory issued September 18 at 11:32AM EDT until September 19 at 12:00PM EDT by NWS Boston/Norton MA\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM; Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket; Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island\n**Issued by:** NWS Boston/Norton MA\n**Sent:** 2026-09-18T11:32:00-04:00\n**Effective:** 2026-09-18T11:32:00-04:00\n**Expires:** 2026-09-19T00:45:00-04:00\n\n## Description\n* WHAT...North winds 10 to 20 kt with gusts up to 25 kt and seas\n3 to 5 feet expected.\n\n* WHERE...In Massachusetts coastal waters, Coastal waters east\nof Ipswich Bay and the Stellwagen Bank National Marine\nSanctuary, Massachusetts Bay and Ipswich Bay, Coastal waters\nfrom Provincetown MA to Chatham MA to Nantucket MA out 20 NM\nand Coastal Waters extending out to 25 NM South of Marthas\nVineyard and Nantucket. In Rhode Island coastal waters,\nCoastal Waters from Montauk NY to Marthas Vineyard extending\nout to 20 NM South of Block Island.\n\n* WHEN...From 8 PM this evening to noon EDT Saturday.\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."}