This alert expired on 15 March 2026 at 21:00 UTC. It is kept here as a record.
No stronger detection stands among the 147 recorded within 20 km of this point since 15 March 2026 — 52 others scored the same. 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 March 15 at 4:19PM EDT until March 15 at 5:00PM EDT by NWS Melbourne FL
An estimated 347,890 people live within 50 km of this point.
Nearby, since 15 March 2026
- March 17, 2026 · score 43 · 2.2 km
- June 24, 2026 · score 43 · 5.9 km
- July 12, 2026 · score 43 · 8.4 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 87 % 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 | 87% |
| Coordinates | 28.3122, -80.6189 |
| Nearest City | Merritt Island (9 km) |
| Population Exposed | 347.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T20:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_014a6fd04ef782521c8a1f582d1e6f04fec9774d_001_1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Volusia-Brevard County Line to Sebastian Inlet 0-20 nm |
| Headline | Special Marine Warning issued March 15 at 4:19PM EDT until March 15 at 5:00PM EDT by NWS Melbourne FL |
| Expires | 2026-03-15T17:00:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 3 W Grant-Valkaria |
| Iem County | Brevard |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | Spotter SLC-211 reported half inch to golf ball sized hail on I-95 between MM 168-169 (near Grant-Valkaria) at 3:49 PM. |
| MergedSources | [{"id":"iem_G_28.080_-80.610_1773603120000","source":"iem","severity":"low","severityValue":25,"timestamp":1773603120000,"latitude":28.08,"longitude":-80.61},{"id":"iem_H_28.010_-80.640_1773604680000","source":"iem","severity":"low","severityValue":25,"timestamp":1773604680000,"latitude":28.01,"longitude":-80.64},{"id":"iem_H_27.940_-80.600_1773603420000","source":"iem","severity":"low","severityValue":25,"timestamp":1773603420000,"latitude":27.94,"longitude":-80.6},{"id":"iem_G_28.100_-80.650_1773604380000","source":"iem","severity":"low","severityValue":25,"timestamp":1773604380000,"latitude":28.1,"longitude":-80.65},{"id":"iem_H_27.940_-80.610_1773604140000","source":"iem","severity":"low","severityValue":25,"timestamp":1773604140000,"latitude":27.94,"longitude":-80.61}] |
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 Merritt Island?
Calamity.live data shows a weather event with CalamityScore 43/100, near Merritt Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.