This alert expired on 12 May 2026 at 16:00 UTC. It is kept here as a record.
It is the 4th strongest of the 23 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 12 at 11:26AM EDT until May 12 at 12:00PM EDT by NWS Melbourne FL
An estimated 1,250,460 people live within 50 km of this point.
Nearby, since 15 March 2026
- March 15, 2026 · score 76 · 5.1 km
- June 14, 2026 · score 46 · 6.7 km
- May 12, 2026 · score 52 · 10.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 82 % 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) | 52 / 100 |
| Our confidence | 82% |
| Coordinates | 28.7589, -81.3347 |
| Nearest City | Lake Mary (1 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Date | 2026-05-12 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.dd4af9855b888473c3186aa56f2a44cb |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Seminole, FL; Orange, FL; Seminole, FL |
| Headline | Severe Thunderstorm Warning issued May 12 at 11:26AM EDT until May 12 at 12:00PM EDT by NWS Melbourne FL |
| Expires | 2026-05-12T12:00:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dd4af9855b888473c3186aa56f2a44cb3199ff98.001.1","noaa_urn:oid:2.49.0.1.840.0.92d271dca3f02fe806cf384882b8647cad29d57b.001.1"] |
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 52/100, near Lake Mary (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.