Special Marine Warning for Biscayne Bay and Coastal Waters off Florida
If you are in immediate danger, call emergency services now.
For real-time, official alerts and instructions for your exact location, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia) as applicable. This article is a data summary, not a substitute for the issuing agency's live warning.
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Special Marine Warning has been issued by NWS Miami FL for Biscayne Bay and coastal waters from Deerfield Beach to Ocean Reef, effective until 12:45 AM EDT on May 4, 2026, due to strong thunderstorms with wind gusts of 34 knots or greater.
What this NWS weather alert tells you, and what most readers miss
This notice was issued by NOAA on May 13, 2026 and geographically references Southeastern Florida Coastal Waters. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.
For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Special Marine Warning, Florida Coast) map to related alerts in the same area of risk - browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.
Special Marine Warning in Florida Coastal Waters
Alert Details
This Special Marine Warning was issued by the National Weather Service (NWS) Miami FL. It is effective from 12:06 AM EDT on May 4, 2026, until 12:45 AM EDT on the same day.
Affected Areas
The warning affects Biscayne Bay, Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM, and Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM, excluding the territorial waters of Bahamas.
What You Should Do
Move to safe harbor until hazardous weather passes. Report severe weather to the Coast Guard or the National Weather Service.
Expected Conditions
Strong thunderstorms are moving east at 25 knots, with wind gusts of 34 knots or greater.
Timeline
The alert is effective from 12:06 AM EDT on May 4, 2026, and ends at 12:45 AM EDT on May 4, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Frequently Asked Questions
Common questions about this NWS weather alert.