{"url_path":"/weather/alerts/2.49.0.1.840.0.9f85225afdb4c0e56fb4c56a015202a57acd2ce7.001.1","section_key":"alert","section_title":"Small Craft Advisory issued September 21 at 2:47PM EDT until September 22 at 3:00AM EDT by NWS Boston/Norton MA","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-21","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.9f85225afdb4c0e56fb4c56a015202a57acd2ce7.001.1","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":217,"has_tables":false,"body_markdown":"# Small Craft Advisory: Small Craft Advisory issued September 21 at 2:47PM EDT until September 22 at 3:00AM EDT by NWS Boston/Norton MA\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** 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:** 2026-09-21T14:47:00-04:00\n**Effective:** 2026-09-21T14:47:00-04:00\n**Expires:** 2026-09-22T07:00:00-04:00\n\n## Description\n* WHAT...For the Small Craft Advisory, northeast winds 15 to 20\nkt with gusts up to 25 kt and seas 3 to 5 feet. For the Gale\nWatch, northeast winds 20 to 30 kt with gusts up to 40 kt and\nseas 8 to 13 feet possible.\n\n* WHERE...In Massachusetts coastal waters, Coastal Waters\nextending out to 25 NM South of Marthas Vineyard and\nNantucket. In Rhode Island coastal waters, Coastal Waters from\nMontauk NY to Marthas Vineyard extending out to 20 NM South of\nBlock Island.\n\n* WHEN...For the Small Craft Advisory, until 3 AM EDT Tuesday.\nFor the Gale Watch, from Tuesday afternoon through Thursday\nafternoon.\n\n* IMPACTS...Strong winds can cause hazardous seas which could\ncapsize or damage vessels and reduce visibility.\n\n## Instructions\nMariners should consider altering plans to avoid possible\nhazardous conditions.  Remain in port, seek safe harbor, alter\ncourse, and/or secure the vessel for severe wind and seas."}