This alert expired on 21 June 2026 at 01:45 UTC. It is kept here as a record.
It is the 4th strongest of the 20 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 9:36PM EDT until June 20 at 9:45PM EDT by NWS Key West FL
An estimated 538,333 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 1, 2026 · score 48 · 4.3 km
- May 31, 2026 · score 43 · 6.3 km
- June 3, 2026 · score 43 · 8.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 85 % 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) | 48 / 100 |
| Our confidence | 85% |
| Coordinates | 25.2537, -80.3510 |
| Nearest City | Homestead (27 km) |
| Population Exposed | 538.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T01:36:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.45904413af330b172818b1ab67de9ee4 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 Deerfield Beach to Ocean Reef FL out 20 NM |
| Headline | Special Marine Warning issued June 20 at 9:36PM EDT until June 20 at 9:45PM EDT by NWS Key West FL |
| Expires | 2026-06-20T21:45:00-04:00 |
| SenderName | NWS Key West FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.45904413af330b172818b1ab67de9ee45077ec9b.001.1","noaa_urn:oid:2.49.0.1.840.0.02037d1968bd2b00d82370f6cb7869d5c030a5eb.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 47 |
| Iem Unit | MPH |
| Iem City | 8 ESE North Key Largo |
| Iem County | GMZ042 |
| Iem State | FL |
| Iem Wfo | KEY |
| Iem Remark | A north wind gust of 41 knots, or 47 mph, was recorded by the XCFL WeatherFlow mesonet site at Carysfort Reef Light. Winds were sustained at 31 knots, or 36 mph. |
| MergedSources | [{"id":"iem_M_25.230_-80.210_1782004320000","source":"iem","severity":"low","severityValue":25,"timestamp":1782004320000,"latitude":25.23,"longitude":-80.21}] |
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.
Want to know when something happens near Homestead?
Calamity.live data shows a weather event with CalamityScore 48/100, near Homestead (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.