This alert expired on 17 March 2026 at 03:45 UTC. It is kept here as a record.
It is the 6th strongest of the 13 detections recorded within 20 km of this point since 17 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 11:12PM EDT until March 16 at 11:45PM EDT by NWS Miami FL
An estimated 458,092 people live within 50 km of this point.
Nearby, since 17 March 2026
- May 31, 2026 · score 43 · 4.8 km
- June 3, 2026 · score 43 · 7.9 km
- June 21, 2026 · score 48 · 10.5 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 88% |
| Coordinates | 25.2418, -80.4548 |
| Nearest City | Homestead (25 km) |
| Population Exposed | 458.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T03:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.59117eb825b799c6d11926c9c7683933 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas; Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound; Hawk Channel from Ocean Reef to Craig Key out to the reef; Straits of Florida from Ocean Reef to Craig Key out 20 NM; Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Biscayne Bay; Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM; Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM; Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM; Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas and 1 more areas |
| Headline | Special Marine Warning issued March 16 at 11:12PM EDT until March 16 at 11:45PM EDT by NWS Miami FL |
| Expires | 2026-03-16T23:45:00-04:00 |
| SenderName | NWS Miami FL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.59117eb825b799c6d11926c9c7683933751c0703.001.1","noaa_urn:oid:2.49.0.1.840.0.a0b7fd5acf016812a4bdf398aa9c15d5b014d345.001.1","noaa_urn:oid:2.49.0.1.840.0.d2072044c3ab626ce14d3b8589057a18bd2b7515.001.1","noaa_urn:oid:2.49.0.1.840.0.a7d2c494b709d98b6287f3317c49b3d4f9532958.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 45 |
| Iem Unit | MPH |
| Iem City | 5 SSE Islamorada |
| Iem County | GMZ052 |
| Iem State | FL |
| Iem Wfo | KEY |
| Iem Remark | A southerly wind gust of 39 knots, or 45 mph, was recorded by the XALG WeatherFlow mesonet site at Alligator Reef Light. |
| MergedSources | [{"id":"iem_M_24.840_-80.860_1773714000000","source":"iem","severity":"low","severityValue":25,"timestamp":1773714000000,"latitude":24.84,"longitude":-80.86},{"id":"iem_M_24.850_-80.620_1773714180000","source":"iem","severity":"low","severityValue":25,"timestamp":1773714180000,"latitude":24.85,"longitude":-80.62}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 43/100, near Homestead (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.