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Marine Weather Warnings: Live NWS Alerts

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Check for active marine hazard alerts (Small Craft Advisory, Gale Warning, Storm Warning, Coastal Flood, High Surf, and more) from the official NOAA/National Weather Service feed, filtered by US coastal state. For boating operators, ports and shipping, and marine insurance. No key, no proxy.

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Pay per usage

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Timothy Kelvin

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2 days ago

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Marine Weather Warning Tracker: NWS Alerts by Area

Check for active marine hazard alerts from the official NOAA/National Weather Service feed: Small Craft Advisory, Gale Warning, Storm Warning, Coastal Flood, High Surf, Rip Current, and more, filtered by US coastal state.

Who this is for

Boating and marine recreation operators checking active hazard alerts before heading out.
Ports and shipping operations monitoring coastal conditions across multiple areas at once.
Marine insurance underwriters tracking active marine hazard warnings by region.

Input

Field	Type	Description
`areas`	array	Two-letter US coastal state/territory codes, e.g. `["FL", "CA", "HI"]`. Leave empty for all coastal areas nationwide.
`eventTypes`	array	Limit to specific alert types (see list below). Leave empty for all of them.

{
  "areas": ["FL"]
}

Alert types supported: Small Craft Advisory, Gale Watch, Gale Warning, Storm Warning, Hurricane Force Wind Watch, Hurricane Force Wind Warning, Special Marine Warning, Marine Weather Statement, Coastal Flood Advisory, Coastal Flood Watch, Coastal Flood Warning, Coastal Flood Statement, High Surf Advisory, High Surf Warning, Rip Current Statement.

Output

One record per active alert:

{
  "id": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840...",
  "event": "Small Craft Advisory",
  "severity": "Moderate",
  "certainty": "Likely",
  "urgency": "Expected",
  "headline": "Small Craft Advisory issued...",
  "description": "...",
  "instruction": "...",
  "areaDesc": "Coastal waters from...",
  "senderName": "NWS Miami FL",
  "effective": "2026-09-19T06:00:00-04:00",
  "expires": "2026-09-19T18:00:00-04:00",
  "nwsUrl": "https://api.weather.gov/alerts/urn:oid:..."
}

An empty result means no active marine alerts match your filters right now.

How it works

Direct calls to api.weather.gov, official NOAA/National Weather Service alerts feed, US federal government data. No proxy, no scraping.

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